*** a/contrib/pg_trgm/Makefile
--- b/contrib/pg_trgm/Makefile
***************
*** 7,13 **** EXTENSION = pg_trgm
  DATA = pg_trgm--1.3.sql pg_trgm--1.0--1.1.sql pg_trgm--1.1--1.2.sql pg_trgm--1.2--1.3.sql pg_trgm--unpackaged--1.0.sql
  PGFILEDESC = "pg_trgm - trigram matching"
  
! REGRESS = pg_trgm
  
  ifdef USE_PGXS
  PG_CONFIG = pg_config
--- 7,13 ----
  DATA = pg_trgm--1.3.sql pg_trgm--1.0--1.1.sql pg_trgm--1.1--1.2.sql pg_trgm--1.2--1.3.sql pg_trgm--unpackaged--1.0.sql
  PGFILEDESC = "pg_trgm - trigram matching"
  
! REGRESS = pg_trgm pg_substring_trgm
  
  ifdef USE_PGXS
  PG_CONFIG = pg_config
*** /dev/null
--- b/contrib/pg_trgm/data/trgm2.data
***************
*** 0 ****
--- 1,1083 ----
+ Baikal
+ Baikal
+ Baikaluobbal
+ Lake Baikal
+ Baikalakko
+ Baikal Business Centre
+ Baikal Listvyanka Hotel
+ Baikal Airfield
+ Baikalovo
+ Transbaikalia
+ Baikal Mountains
+ Baikal Hotel Moscow
+ Zabaikalie
+ Pribaikalskaya
+ Baikal Plaza
+ Rubaikale
+ Tandobai Algad
+ Daikalay
+ Bakall
+ Stubaital
+ Neustift im Stubaital
+ Neustift im Stubaital
+ Anonyme Appartments Stubaital
+ Barkaladja Pool
+ Awabakal Nature Reserve
+ Awabakal Field Studies Centre
+ Barkala
+ Bailallie
+ Barkala
+ Barkala
+ Bailallie
+ Barkala Park
+ Barkala
+ Barkala
+ Barkala
+ Purba Kalaujan
+ Nabakalas
+ Barkal
+ Baikanthapur
+ Baikarjhuti
+ Baika
+ Baikari
+ Bakalia Char
+ Dakshin Bakalia
+ Barkal
+ Purba Kalmegha
+ Purba Kalmegha
+ Baikari
+ Barkal
+ Efreytor-Bakalovo
+ Baykalsko
+ Baykal
+ Baskaltsi
+ Bakalite
+ Bajkal
+ Efrejtor Bakalovo
+ Kampong Bakaladong
+ Riacho do Sambaibal
+ Sambaibal
+ Barkalabava
+ Zabaykal
+ Bakalar Lake
+ Kaikalahun Indian Reserve 25
+ Tumba-Kalamba
+ Kamba-Kalele
+ Boyagbakala
+ Bombakalo
+ Batikalengbe
+ Bakalukudu
+ Bakalawa
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+ Bakala
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+ Kusu-Bakali
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+ Matamba-Kalenga
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+ Kabankala
+ Bumba-Kalumba
+ Kabankala
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+ Kabikala
+ Mubikale
+ Kanampumba-Kalawa
+ Tshiabakale
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+ Xibaitaling
+ Baikai
+ Baikang
+ Baitaling
+ Baikan
+ Baimaling Linchang
+ Baimalong
+ Baikanzui
+ Baiyali
+ Baimaling
+ Baikan
+ Baimalang Donggang
+ Baimaling
+ Baimaling
+ Baimaling
+ Baikangshuoma
+ Baitaliao
+ Baimaling
+ Taikale
+ Babainale
+ Bailale
+ Baibale
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+ Baiwale
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+ Baikai
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+ Xiabaikan
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+ Baika
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+ Baikacun
+ Baisala
+ Bailalin
+ Baimala
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+ Dabaika
+ Caikalong
+ Cuobaikacun
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+ Baikang
+ Baimalin
+ Baikang
+ Subaika
+ Baykal
+ Gabakkale
+ Barkallou
+ Rokba Kala Sardoun
+ Embatkala
+ Bodega Tabaibal
+ Golba Kalo
+ Haikala
+ Haikala
+ Kaikale
+ Waikaloulevu
+ Waikalou Creek
+ Waikalou Creek
+ Waikalou Creek
+ Waikalou Creek
+ Waikalou Creek
+ Waikalou Creek
+ Waikalou Creek
+ Waikalou Creek
+ Waikalou Creek
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+ Ndelaikalokalo
+ Bay of Backaland
+ Bankali
+ Bankali
+ Baika
+ Ker Samba Kalla
+ Demba Kali
+ Bakalarr
+ Baipal
+ Kalibakalako
+ Dalabakala
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+ Sembaikan
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+ Tanjung Ompaikalio
+ Bonebabakal
+ Tanjung Batikala
+ Pulau Bakalanpauno
+ Teluk Bakalan
+ Bakaltua Bank
+ Bakalrejo
+ Bakalan
+ Bakalan
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+ Bakalan
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+ Bakalan Dua
+ Kali Purbakala
+ Desa Bakalanwringinpitu
+ Bakalan
+ Tukad Kubakal
+ Praikalangga
+ Banjar Kubakal
+ Eat Bakal
+ Sungai Bakala
+ Kombakalada
+ Bankalan
+ Sori Rabakalo
+ Kahambikalela
+ Baikarara
+ Baikapaka
+ Bakalan
+ Tukad Bakalan
+ Teluk Haludubakal
+ Yabakalewa
+ Praikalumbang
+ Waikalowo
+ Praikalubu
+ Loko Praikalubu
+ Ramuk Ombakalada
+ Praikalebung
+ Praikaleka
+ Praikalumbang
+ Bakalan
+ Andabakal
+ Praikalau
+ Praikalokat
+ Praikalimbung
+ Bambakalo
+ Leubakkalian
+ Pematang Baitalimbangan
+ Lebakalil
+ Gereba Kaler
+ Krajan Bakalan
+ Bakalan Lor
+ Bakalan
+ Bakalan
+ Bakal
+ Bakalan Barat
+ Bakalan
+ Bakalan
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+ Bakalan
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+ Bakalan
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+ Bakalan Kulon
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+ Umbulan Maharobakal
+ Bakaldalam
+ Talang Bakal
+ Pematang Bakalpanang
+ Baidaloen
+ Jatibakal
+ Tubu Bakalekuk
+ Dola Peimambakal
+ Bakalang
+ Teluk Bakalang
+ Salu Baidale
+ Bakalerek
+ Ile Bakalibu
+ Parbakalan
+ Praikalembu
+ Palindi Laikali
+ Praikalu
+ Sori Labakalate
+ Air Bakal-kecil
+ Sungaikalung
+ Sungaikalong
+ Pematang Bakalpanjang
+ Bakaldalam
+ Payabakal
+ Waikala
+ Sungaikali
+ Sungai Pebakalan
+ Parit Membakal
+ Bakalpakebo
+ Baikat Abu Jaraban
+ Maikalganj
+ Maikala Range
+ Bakalha
+ Baitalpur
+ Baikanthpur
+ Baihal
+ Barkala Reserved Forest
+ Barkala
+ Babaipalli
+ Kaikalapettai
+ Kambainallur
+ Bakkalale
+ Kaikalui
+ Baijalpur
+ Barkal
+ Barkal
+ Bankalah
+ Nehalla Bankalah Reserved Forest
+ Barkala Rao
+ Barkala
+ Barkala
+ Baijalpur
+ Barkali
+ Barkali
+ Baidal
+ Barkal
+ Barkaleh
+ Darreh Pumba Kal
+ Bahkalleh
+ Wibakale
+ Gaikali
+ Gagaba Kalo
+ Barkalare
+ Bakal
+ Bakkalmal
+ Bakaly
+ Gora Bakalyadyr
+ Rodnik Bakalybulak
+ Urochishche Bakaly
+ Sopka Bakaly
+ Gory Bakaly
+ Bakaly
+ Bugor Arba-Kalgan
+ Ozero Baykal
+ Kolodets Tabakkalgan
+ Walangivattu Vaikal
+ Vattevaikal Anicut
+ Vaikali Tevar Kulam
+ Vaikalitevan Kulam
+ Vaikaladichchenai
+ Uchchodaikallu
+ Sellapattu Vaikal
+ Savata Vaikal
+ Puttadivali Vaikal
+ Palukadu Vaikal
+ Mulaikallu Kulam
+ Koraikallimadu
+ Koraikalapu Kulam
+ Karaiyamullivaikal
+ Karaivaikal Kulam
+ Kanawali Vaikal
+ Habakkala
+ Chalam Vaikal Aru
+ Ambakala Wewa
+ Alaikallupoddakulam
+ Alaikallupodda Alankulam
+ Akamadi Vaikal
+ Alaikalluppodda Kulam
+ Vaikaliththevakulam
+ Baikole
+ Baikai
+ Sidi Mohammed el Bakali
+ Sidi Mohammed Bakkal
+ Sidi Bakal
+ Oulad el Bakkal
+ Zaouia Oulad Bakal
+ Azib el Bakkali
+ Bakal
+ Tombakala
+ Malaikaly
+ Ambadikala
+ Ambadikala
+ Bakalica
+ Bakalica
+ Bakalnica
+ Bakal
+ Abankala
+ Kombakala
+ Bawkalut
+ Bakaleko
+ Bawkalut Chaung
+ Baukala
+ Bankala Hill
+ Bakali
+ Cerro Bainaltzin
+ Sungai Bakal
+ Bukit Ubaibalih
+ Kampong Sombakal
+ Kampung Lebai Ali
+ Batikal
+ Bakalalan Airport
+ Bakal
+ Bankali
+ Bakala
+ Maikali
+ Bikal
+ Barkala
+ Bakalum
+ Bakali
+ Bakalambani
+ Abakaliki
+ Tsaunin Maikalaji
+ Abakaliki
+ Bakale
+ Baikaha
+ Llano Limbaika
+ Barkald
+ Barkald stasjon
+ Barkaleitet
+ Barkaldfossen
+ Barkaldvola
+ Bakkalegskardet
+ Baikajavri
+ Baikajavri
+ Barkald
+ Barkalden
+ Bakkalia
+ Barkald
+ Siljabaika
+ Aikaluokta
+ Blombakkali
+ Bakkalia
+ Bavkalasis
+ Baikajohka
+ Bakkalykkja
+ Bakalauri
+ Bakalauri1
+ Bakalauri2
+ Bakalauri3
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+ Bakalauri5
+ Bakalauri6
+ Bakalauri7
+ Bakalauri8
+ Bakalauri9
+ Bakal
+ Bakal
+ Bakalsen
+ Baika
+ Baiyaldi
+ Bakale
+ Naikala
+ Baikanda
+ Barkalne
+ Baijalpur
+ Bakalipur
+ Bakaldum
+ Bakal
+ Raikal
+ Baikatte
+ Maikal
+ Bakalbhar
+ Waikalabubu Bay
+ Baikai Island
+ Abikal
+ Boikalakalawa Bay
+ Maikal River
+ Bakalao Asibi Point
+ Kabankalan
+ Kabankalan
+ Kabankalan
+ City of Kabankalan
+ Bikal
+ Bankal
+ Bankal
+ Bankal
+ Bakalod Island
+ Bakalao Point
+ Bakalan River
+ Bakal Dos
+ Bakal Uno
+ Daang Bakal
+ Bankal School
+ Kabankalan
+ Bakal Tres
+ Daang Bakal
+ Kabankalan City Public Plaza
+ Ranra Tabai Algad
+ Bairkal Jabal
+ Bairkal Dhora
+ Bairkal
+ Zaibai Algad
+ Gulba Kalle
+ Ragha Bakalzai
+ Dabbarkal Sar
+ Tabai Algad
+ Haikalzai
+ Wuchobai Algad
+ Jabba Kalai
+ Goth Soba Kaloi
+ Baikar Tsarai
+ Dudgaikal
+ Baixale Kamar
+ Zebai Algad
+ Bakal Khel
+ Goth Haikal
+ Haikal
+ Jaba Kalle
+ Bakalovina
+ Bakalovina
+ Salabaikasy
+ Guba Kalita
+ Guba Kalgalaksha
+ Guba Kaldo
+ Bakalovo
+ Baykalovo
+ Baykal
+ Baykal
+ Baskalino
+ Sopka Barkaleptskaya
+ Bakaly
+ Bakaly
+ Bakalovskaya Ferma
+ Bakalovo
+ Bakalinskiy Rayon
+ Sovkhoz Bakalinskiy
+ Bakalinskiy
+ Bakaldy
+ Bakaldinskoye
+ Urochishche Bakaldikha
+ Bakal
+ Zabaykalovskiy
+ Barkalova
+ Barkalovka
+ Gora Barkalova
+ Baykalovo
+ Gora Barkalyu
+ Bikalamakhi
+ Stantsiya Bakal
+ Baykalovskiy Rayon
+ Baykalovskiy
+ Baykalovsk
+ Baykalovo
+ Baykalovo
+ Baykalovo
+ Baykal
+ Bakala
+ Bakalda
+ Bakalinskiy
+ Ozero Baykal
+ Ozero Baykal
+ Boloto Malyy Baykal
+ Boloto Baykal
+ Zabaykalka
+ Stantsiya Baykal
+ Ozero Baykal
+ Baykal
+ Baykal
+ Baykal
+ Baykalo-Amurskaya Zheleznaya Doroga
+ Baykal
+ Baykal
+ Kolkhoz Krasnyy Baykal
+ Zaliv Baykal
+ Ozero Baykal
+ Bakalino
+ Ovrag Bakalda
+ Bakaldovshchina
+ Baykalovo
+ Baykal
+ Ozero Baykal
+ Ozero Baykal
+ Ozero Baykal
+ Ozero Baykal
+ Ozero Baykal
+ Ozero Baykal
+ Prud Novyy Baykal
+ Ozero Baykal
+ Ozero Baykal
+ Baykal
+ Bakaleyka
+ Bakalka
+ Baykal
+ Bakaly TV Mast
+ Urochishche Bakalovo
+ Kambaika
+ Maloye Baykalovo
+ Baykal
+ Boloto Baykal
+ Ozero Baykal
+ Bakaly
+ Bakalinskiy Leskhoz
+ Ozero Baykal
+ Bakaly
+ Bakaly
+ Bikalikha
+ Bakalka
+ Kordon Barkalo
+ Bakalda
+ Sanatoriy Baykal
+ Port Baykal
+ Baykalikha
+ Polevoy Stan Baykal
+ Baykal
+ Ozero Baykal
+ Bakalovka
+ Ramada Makkah Shubaika
+ Mount Tohebakala
+ Tambakale Island
+ Mbanitambaika Island
+ Mbakalaka Island
+ Kumbakale
+ Kaikaloka
+ Kelesaikal
+ Nasb Gabakallah
+ Jabal Barkal
+ Barkal
+ Jabal Abakallah
+ Al Barkali
+ Shabakal Abbass
+ Mabaikuli
+ Gbonkobankala
+ Bambakalema
+ Bambakalia
+ Baiwala
+ Babakalia
+ Babakalia
+ Baikama
+ Bankala
+ Baikama
+ Bankalol
+ Kundebakali
+ Yumbaikamadu
+ Tabakali
+ Keur Samba Kala
+ Daba Kalharereh
+ Barkale
+ Bakalshile
+ Bakaloolay
+ Buur Bakaley
+ Bakaley
+ Buur Bakale
+ Bakale
+ Bakalaale
+ Bakal
+ Bakal
+ Bakal
+ Bakal
+ Bakal
+ Bakal
+ Bakal
+ Bakal
+ Bakal
+ Jabal Mobakali
+ Khor Bakallii
+ Korombaital
+ Barkala
+ Ambakali
+ Ba Kaliin
+ Barkal
+ Bakala
+ Barkale
+ Mbay Bakala
+ Tagobikala
+ Fayzabadkala
+ Aghbai Allazy
+ Aghbai Alikagar
+ Gora Fayzabadkala
+ Daraikalot
+ Aghbai Alakisirak
+ Beikala
+ Foho Berbakalau
+ Mota Caicabaisala
+ Beikala
+ Sungai Utabailale
+ Sungai Utabailale
+ Urochishche Bakalarnyn-Ayasy
+ Urochishche Batkali
+ Khrebet Batkali
+ Ras Barkallah
+ Baykal
+ Babakale
+ Fabrikalar
+ Bakalukalu Shan
+ Bakalukalu
+ Laikala
+ Bakalovo
+ Waikalakaka
+ Columbus Bakalar Municipal Airport
+ Bakalar Library
+ Bakkala Cemetery
+ Clifton T Barkalow Elementary School
+ Barkalow Hollow
+ Kailuapuhi Waikalua Homesteads
+ Kawaikalia Gulch
+ Waikalae
+ Waikaloa Stream
+ Waikalua-Loko Fish Pond
+ Halekou Waikaluakai Homesteads
+ East Waikalua
+ Omar Haikal Islamic Academy
+ Bakalar Air Force Base (historical)
+ Koshbakaly
+ Bagkalen
+ Gora Baikara
+ Sibankala
+ Mfumbaika
+ Mbakalungu
+ Chumbaika
+ Tombankala
+ Ntombankala School
+ Bakalabwa Pans
+ Khobai al Janhra
+ Holiday Inn Dubai Al Barsha
+ Novotel Dubai Al Barsha
+ Holiday Inn Dubai Al Barsha
+ Doubletree Res.Dubai-Al Barsha
+ Doubletree By Hilton Hotel and Apartments Dubai Al Barsha
+ Doubletree By Hilton Dubai Al Barsha Hotel and Res
+ Park Inn By Radisson Dubai Al Barsha
+ Ramee Rose Hotel Dubai Al Barsha
+ Aparthotel Adagio Premium Dubai Al Barsha
+ Ataikala
+ Selman Marrakech
+ Riad Ain Marrakech
+ Taj Palace Marrakech
+ Delano Marrakech
+ Pullman Marrakech Palmeraie Resort And Spa
+ Lalla Calipau Marrakech
+ Hotel Fashion Marrakech
+ Four Seasons Resort Marrakech
+ Adama Resort Marrakech
+ Pullman Marrakech Palmeraie Re
+ Ramada Resort Marrakech Douar Al Hana
+ Hotel Zahia Marrakech
+ Hotel Marrakech Le Tichka
+ Le Chems Marrakech
+ Beachcomber Royal Palm Marrakech
+ Residence Marrakech
+ Riad Hermes Marrakech
+ Riad La Lune De Marrakech
+ Hotel Marrakech Le Sangho Privilege
+ Tempoo Hotel Marrakech
+ Ag Hotel & Spa Marrakech
+ Palm Appart Club Marrakech
+ Hotel Ibis Moussafir Marrakech Palmeraie
+ Ibis Marrakech Gare Voyageurs
+ Marrakech Ryads Parc And Spa
+ Terra Mia Marrakech Riad
+ Residence Dar Lamia Marrakech
+ Pullman Marrakech Palmeraie Rs
+ Moussaf Marrakech Centre Gare
+ Tempoo Hotel Marrakech Adults Only
+ Sahara Palace Marrakech
+ Moroccan House Marrakech
+ El Andalouss And Spa Marrakech
+ Suite Novotel Marrakech Rs
+ Dar Catalina Marrakech Hotel Non Refundable Room
+ Marrakech Hotel
+ Oued Tammarrakech
+ Tammarrakech
+ Cercle de Marrakech-Banlieue
+ Marrakech-Tensift-Al Haouz
+ Koudia Marrakech
+ Hotel Tichka Salam Marrakech
+ L'Atlas Marrakech
+ Royal Mirage Deluxe Marrakech
+ Golden Tulip Farah Marrakech
+ Ryad Mogador Marrakech
+ Coralia Club Marrakech Palmariva
+ La Sultana Marrakech
+ Marrakech-Medina
+ Marrakech
+ Museum of Marrakech
+ Douar Marrakechiyinc
+ Ibis Marrakech Centre Gare
+ Golden Tulip Rawabi Marrakech
+ Murano Resort Marrakech
+ Marrakech Garden Hotel
+ Pullman Marrakech Palmerai Resort & Spa
+ The Pearl Marrakech
+ Palais Calipau Marrakech
+ Hostal Equity Point Marrakech
+ Sofitel Marrakech Lounge And Spa
+ Pullman Marrakech Hotel And Spa
+ Sofitel Marrakech Palais Imperial
+ Hotel Ibis Moussafir Marrakech Centre Gare
+ Red Hotel Marrakech
+ Riad Zenith Marrakech
+ Ksar Catalina Marrakech Hotel
+ Blue Sea Hotel Marrakech Ryads Parc & Spa
+ Bluebay Marrakech
+ Pullman Marrakech Palmeraie Resort & Spa Hotel
+ Sahara Palace Marrakech
+ Riad Litzy Marrakech
+ Sultana Hotel & Spa Marrakech
+ Albatros Club Marrakech
+ Hotel Sangho Club Marrakech
+ Suite Novotel Marrakech Hotel
+ Riad Utopia Suites & Spa Marrakech
+ Riad Fatinat Marrakech
+ Riad Dar El Aila Marrakech
+ Es Saadi And Casino De Marrakech
+ Dar Catalina Marrakech Hotel
+ Grace Marrakech
+ Marrakesh Apartments
+ Marrakesh Country Club
+ Koudiat Lmerrakechiyine
+ Sidi Mohammed el Marrakchi
+ Marrakesh
+ Marrakchien
+ Marrakchia
+ Marrakesh Menara Airport
+ Marrakesh Hua Hin Resort & Spa
+ Marrakesh Hua Hin Resort And Spa
+ Marrakesh Resort And Spa (Pool Suite)
+ Marrakesh Huahin Resort & Spa
+ Ibis Moussafir Marrakesh Centre Gare Hotel
+ Maerak-chi
+ Dar Hammou Ben Merrakchi
+ Lalla el Marakchia
+ Khrebet Marrakh
+ Sungai Maru Kechil
+ Marrache
+ Goth Marracha
+ Maramech Hill
+ Maramech Woods Nature Preserve
+ Oued Karakech
+ Samarra School
+ Jangal-e Marakeh Sar
*** /dev/null
--- b/contrib/pg_trgm/expected/pg_substring_trgm.out
***************
*** 0 ****
--- 1,2211 ----
+ CREATE TABLE test_trgm2(t text COLLATE "C");
+ \copy test_trgm2 from 'data/trgm2.data'
+ select t,substring_similarity('Baykal',t) as sml from test_trgm2 where 'Baykal' <% t order by sml desc, t;
+                   t                  |   sml    
+ -------------------------------------+----------
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Boloto Baykal                       |        1
+  Boloto Baykal                       |        1
+  Boloto Malyy Baykal                 |        1
+  Kolkhoz Krasnyy Baykal              |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Polevoy Stan Baykal                 |        1
+  Port Baykal                         |        1
+  Prud Novyy Baykal                   |        1
+  Sanatoriy Baykal                    |        1
+  Stantsiya Baykal                    |        1
+  Zaliv Baykal                        |        1
+  Baykalikha                          | 0.857143
+  Baykalo-Amurskaya Zheleznaya Doroga | 0.857143
+  Baykalovo                           | 0.857143
+  Baykalovo                           | 0.857143
+  Baykalovo                           | 0.857143
+  Baykalovo                           | 0.857143
+  Baykalovo                           | 0.857143
+  Baykalovo                           | 0.857143
+  Baykalovsk                          | 0.857143
+  Baykalovskiy                        | 0.857143
+  Baykalovskiy Rayon                  | 0.857143
+  Baykalsko                           | 0.857143
+  Maloye Baykalovo                    | 0.857143
+  Zabaykal                            | 0.714286
+ (56 rows)
+ 
+ select t,substring_similarity('Kabankala',t) as sml from test_trgm2 where 'Kabankala' <% t order by sml desc, t;
+               t               | sml 
+ ------------------------------+-----
+  Kabankala                    |   1
+  Kabankala                    |   1
+  Kabankala                    |   1
+  Kabankala                    |   1
+  City of Kabankalan           | 0.9
+  Kabankalan                   | 0.9
+  Kabankalan                   | 0.9
+  Kabankalan                   | 0.9
+  Kabankalan                   | 0.9
+  Kabankalan City Public Plaza | 0.9
+  Abankala                     | 0.7
+  Bankala                      | 0.6
+  Bankala Hill                 | 0.6
+  Gbonkobankala                | 0.6
+  Ntombankala School           | 0.6
+  Sibankala                    | 0.6
+  Tombankala                   | 0.6
+ (17 rows)
+ 
+ select t,substring_similarity('Baykal',t) as sml from test_trgm2 where t %> 'Baykal' order by sml desc, t;
+                   t                  |   sml    
+ -------------------------------------+----------
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Boloto Baykal                       |        1
+  Boloto Baykal                       |        1
+  Boloto Malyy Baykal                 |        1
+  Kolkhoz Krasnyy Baykal              |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Polevoy Stan Baykal                 |        1
+  Port Baykal                         |        1
+  Prud Novyy Baykal                   |        1
+  Sanatoriy Baykal                    |        1
+  Stantsiya Baykal                    |        1
+  Zaliv Baykal                        |        1
+  Baykalikha                          | 0.857143
+  Baykalo-Amurskaya Zheleznaya Doroga | 0.857143
+  Baykalovo                           | 0.857143
+  Baykalovo                           | 0.857143
+  Baykalovo                           | 0.857143
+  Baykalovo                           | 0.857143
+  Baykalovo                           | 0.857143
+  Baykalovo                           | 0.857143
+  Baykalovsk                          | 0.857143
+  Baykalovskiy                        | 0.857143
+  Baykalovskiy Rayon                  | 0.857143
+  Baykalsko                           | 0.857143
+  Maloye Baykalovo                    | 0.857143
+  Zabaykal                            | 0.714286
+ (56 rows)
+ 
+ select t,substring_similarity('Kabankala',t) as sml from test_trgm2 where t %> 'Kabankala' order by sml desc, t;
+               t               | sml 
+ ------------------------------+-----
+  Kabankala                    |   1
+  Kabankala                    |   1
+  Kabankala                    |   1
+  Kabankala                    |   1
+  City of Kabankalan           | 0.9
+  Kabankalan                   | 0.9
+  Kabankalan                   | 0.9
+  Kabankalan                   | 0.9
+  Kabankalan                   | 0.9
+  Kabankalan City Public Plaza | 0.9
+  Abankala                     | 0.7
+  Bankala                      | 0.6
+  Bankala Hill                 | 0.6
+  Gbonkobankala                | 0.6
+  Ntombankala School           | 0.6
+  Sibankala                    | 0.6
+  Tombankala                   | 0.6
+ (17 rows)
+ 
+ create index trgm_idx2 on test_trgm2 using gist (t gist_trgm_ops);
+ set enable_seqscan=off;
+ select t,substring_similarity('Baykal',t) as sml from test_trgm2 where 'Baykal' <% t order by sml desc, t;
+                   t                  |   sml    
+ -------------------------------------+----------
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Boloto Baykal                       |        1
+  Boloto Baykal                       |        1
+  Boloto Malyy Baykal                 |        1
+  Kolkhoz Krasnyy Baykal              |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Polevoy Stan Baykal                 |        1
+  Port Baykal                         |        1
+  Prud Novyy Baykal                   |        1
+  Sanatoriy Baykal                    |        1
+  Stantsiya Baykal                    |        1
+  Zaliv Baykal                        |        1
+  Baykalikha                          | 0.857143
+  Baykalo-Amurskaya Zheleznaya Doroga | 0.857143
+  Baykalovo                           | 0.857143
+  Baykalovo                           | 0.857143
+  Baykalovo                           | 0.857143
+  Baykalovo                           | 0.857143
+  Baykalovo                           | 0.857143
+  Baykalovo                           | 0.857143
+  Baykalovsk                          | 0.857143
+  Baykalovskiy                        | 0.857143
+  Baykalovskiy Rayon                  | 0.857143
+  Baykalsko                           | 0.857143
+  Maloye Baykalovo                    | 0.857143
+  Zabaykal                            | 0.714286
+ (56 rows)
+ 
+ select t,substring_similarity('Kabankala',t) as sml from test_trgm2 where 'Kabankala' <% t order by sml desc, t;
+               t               | sml 
+ ------------------------------+-----
+  Kabankala                    |   1
+  Kabankala                    |   1
+  Kabankala                    |   1
+  Kabankala                    |   1
+  City of Kabankalan           | 0.9
+  Kabankalan                   | 0.9
+  Kabankalan                   | 0.9
+  Kabankalan                   | 0.9
+  Kabankalan                   | 0.9
+  Kabankalan City Public Plaza | 0.9
+  Abankala                     | 0.7
+  Bankala                      | 0.6
+  Bankala Hill                 | 0.6
+  Gbonkobankala                | 0.6
+  Ntombankala School           | 0.6
+  Sibankala                    | 0.6
+  Tombankala                   | 0.6
+ (17 rows)
+ 
+ select t,substring_similarity('Baykal',t) as sml from test_trgm2 where t %> 'Baykal' order by sml desc, t;
+                   t                  |   sml    
+ -------------------------------------+----------
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Boloto Baykal                       |        1
+  Boloto Baykal                       |        1
+  Boloto Malyy Baykal                 |        1
+  Kolkhoz Krasnyy Baykal              |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Polevoy Stan Baykal                 |        1
+  Port Baykal                         |        1
+  Prud Novyy Baykal                   |        1
+  Sanatoriy Baykal                    |        1
+  Stantsiya Baykal                    |        1
+  Zaliv Baykal                        |        1
+  Baykalikha                          | 0.857143
+  Baykalo-Amurskaya Zheleznaya Doroga | 0.857143
+  Baykalovo                           | 0.857143
+  Baykalovo                           | 0.857143
+  Baykalovo                           | 0.857143
+  Baykalovo                           | 0.857143
+  Baykalovo                           | 0.857143
+  Baykalovo                           | 0.857143
+  Baykalovsk                          | 0.857143
+  Baykalovskiy                        | 0.857143
+  Baykalovskiy Rayon                  | 0.857143
+  Baykalsko                           | 0.857143
+  Maloye Baykalovo                    | 0.857143
+  Zabaykal                            | 0.714286
+ (56 rows)
+ 
+ select t,substring_similarity('Kabankala',t) as sml from test_trgm2 where t %> 'Kabankala' order by sml desc, t;
+               t               | sml 
+ ------------------------------+-----
+  Kabankala                    |   1
+  Kabankala                    |   1
+  Kabankala                    |   1
+  Kabankala                    |   1
+  City of Kabankalan           | 0.9
+  Kabankalan                   | 0.9
+  Kabankalan                   | 0.9
+  Kabankalan                   | 0.9
+  Kabankalan                   | 0.9
+  Kabankalan City Public Plaza | 0.9
+  Abankala                     | 0.7
+  Bankala                      | 0.6
+  Bankala Hill                 | 0.6
+  Gbonkobankala                | 0.6
+  Ntombankala School           | 0.6
+  Sibankala                    | 0.6
+  Tombankala                   | 0.6
+ (17 rows)
+ 
+ drop index trgm_idx2;
+ create index trgm_idx2 on test_trgm2 using gin (t gin_trgm_ops);
+ set enable_seqscan=off;
+ select t,substring_similarity('Baykal',t) as sml from test_trgm2 where 'Baykal' <% t order by sml desc, t;
+                   t                  |   sml    
+ -------------------------------------+----------
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Boloto Baykal                       |        1
+  Boloto Baykal                       |        1
+  Boloto Malyy Baykal                 |        1
+  Kolkhoz Krasnyy Baykal              |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Polevoy Stan Baykal                 |        1
+  Port Baykal                         |        1
+  Prud Novyy Baykal                   |        1
+  Sanatoriy Baykal                    |        1
+  Stantsiya Baykal                    |        1
+  Zaliv Baykal                        |        1
+  Baykalikha                          | 0.857143
+  Baykalo-Amurskaya Zheleznaya Doroga | 0.857143
+  Baykalovo                           | 0.857143
+  Baykalovo                           | 0.857143
+  Baykalovo                           | 0.857143
+  Baykalovo                           | 0.857143
+  Baykalovo                           | 0.857143
+  Baykalovo                           | 0.857143
+  Baykalovsk                          | 0.857143
+  Baykalovskiy                        | 0.857143
+  Baykalovskiy Rayon                  | 0.857143
+  Baykalsko                           | 0.857143
+  Maloye Baykalovo                    | 0.857143
+  Zabaykal                            | 0.714286
+ (56 rows)
+ 
+ select t,substring_similarity('Kabankala',t) as sml from test_trgm2 where 'Kabankala' <% t order by sml desc, t;
+               t               | sml 
+ ------------------------------+-----
+  Kabankala                    |   1
+  Kabankala                    |   1
+  Kabankala                    |   1
+  Kabankala                    |   1
+  City of Kabankalan           | 0.9
+  Kabankalan                   | 0.9
+  Kabankalan                   | 0.9
+  Kabankalan                   | 0.9
+  Kabankalan                   | 0.9
+  Kabankalan City Public Plaza | 0.9
+  Abankala                     | 0.7
+  Bankala                      | 0.6
+  Bankala Hill                 | 0.6
+  Gbonkobankala                | 0.6
+  Ntombankala School           | 0.6
+  Sibankala                    | 0.6
+  Tombankala                   | 0.6
+ (17 rows)
+ 
+ select t,substring_similarity('Baykal',t) as sml from test_trgm2 where t %> 'Baykal' order by sml desc, t;
+                   t                  |   sml    
+ -------------------------------------+----------
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Boloto Baykal                       |        1
+  Boloto Baykal                       |        1
+  Boloto Malyy Baykal                 |        1
+  Kolkhoz Krasnyy Baykal              |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Polevoy Stan Baykal                 |        1
+  Port Baykal                         |        1
+  Prud Novyy Baykal                   |        1
+  Sanatoriy Baykal                    |        1
+  Stantsiya Baykal                    |        1
+  Zaliv Baykal                        |        1
+  Baykalikha                          | 0.857143
+  Baykalo-Amurskaya Zheleznaya Doroga | 0.857143
+  Baykalovo                           | 0.857143
+  Baykalovo                           | 0.857143
+  Baykalovo                           | 0.857143
+  Baykalovo                           | 0.857143
+  Baykalovo                           | 0.857143
+  Baykalovo                           | 0.857143
+  Baykalovsk                          | 0.857143
+  Baykalovskiy                        | 0.857143
+  Baykalovskiy Rayon                  | 0.857143
+  Baykalsko                           | 0.857143
+  Maloye Baykalovo                    | 0.857143
+  Zabaykal                            | 0.714286
+ (56 rows)
+ 
+ select t,substring_similarity('Kabankala',t) as sml from test_trgm2 where t %> 'Kabankala' order by sml desc, t;
+               t               | sml 
+ ------------------------------+-----
+  Kabankala                    |   1
+  Kabankala                    |   1
+  Kabankala                    |   1
+  Kabankala                    |   1
+  City of Kabankalan           | 0.9
+  Kabankalan                   | 0.9
+  Kabankalan                   | 0.9
+  Kabankalan                   | 0.9
+  Kabankalan                   | 0.9
+  Kabankalan City Public Plaza | 0.9
+  Abankala                     | 0.7
+  Bankala                      | 0.6
+  Bankala Hill                 | 0.6
+  Gbonkobankala                | 0.6
+  Ntombankala School           | 0.6
+  Sibankala                    | 0.6
+  Tombankala                   | 0.6
+ (17 rows)
+ 
+ select set_substring_limit(0.5);
+  set_substring_limit 
+ ---------------------
+                  0.5
+ (1 row)
+ 
+ select t,substring_similarity('Baykal',t) as sml from test_trgm2 where 'Baykal' <% t order by sml desc, t;
+                   t                  |   sml    
+ -------------------------------------+----------
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Boloto Baykal                       |        1
+  Boloto Baykal                       |        1
+  Boloto Malyy Baykal                 |        1
+  Kolkhoz Krasnyy Baykal              |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Polevoy Stan Baykal                 |        1
+  Port Baykal                         |        1
+  Prud Novyy Baykal                   |        1
+  Sanatoriy Baykal                    |        1
+  Stantsiya Baykal                    |        1
+  Zaliv Baykal                        |        1
+  Baykalikha                          | 0.857143
+  Baykalo-Amurskaya Zheleznaya Doroga | 0.857143
+  Baykalovo                           | 0.857143
+  Baykalovo                           | 0.857143
+  Baykalovo                           | 0.857143
+  Baykalovo                           | 0.857143
+  Baykalovo                           | 0.857143
+  Baykalovo                           | 0.857143
+  Baykalovsk                          | 0.857143
+  Baykalovskiy                        | 0.857143
+  Baykalovskiy Rayon                  | 0.857143
+  Baykalsko                           | 0.857143
+  Maloye Baykalovo                    | 0.857143
+  Zabaykal                            | 0.714286
+  Bakal Batu                          | 0.571429
+  Zabaykalka                          | 0.571429
+  Zabaykalovskiy                      | 0.571429
+ (59 rows)
+ 
+ select t,substring_similarity('Kabankala',t) as sml from test_trgm2 where 'Kabankala' <% t order by sml desc, t;
+                 t                 |   sml    
+ ----------------------------------+----------
+  Kabankala                        |        1
+  Kabankala                        |        1
+  Kabankala                        |        1
+  Kabankala                        |        1
+  City of Kabankalan               |      0.9
+  Kabankalan                       |      0.9
+  Kabankalan                       |      0.9
+  Kabankalan                       |      0.9
+  Kabankalan                       |      0.9
+  Kabankalan City Public Plaza     |      0.9
+  Abankala                         |      0.7
+  Bankala                          |      0.6
+  Bankala Hill                     |      0.6
+  Gbonkobankala                    |      0.6
+  Ntombankala School               |      0.6
+  Sibankala                        |      0.6
+  Tombankala                       |      0.6
+  Kabakala                         | 0.583333
+  Bankalah                         |      0.5
+  Bankalan                         |      0.5
+  Bankalan                         |      0.5
+  Kamba-Kala                       |      0.5
+  Keur Samba Kala                  |      0.5
+  Nehalla Bankalah Reserved Forest |      0.5
+  Rokba Kala Sardoun               |      0.5
+ (25 rows)
+ 
+ select t,substring_similarity('Baykal',t) as sml from test_trgm2 where t %> 'Baykal' order by sml desc, t;
+                   t                  |   sml    
+ -------------------------------------+----------
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Baykal                              |        1
+  Boloto Baykal                       |        1
+  Boloto Baykal                       |        1
+  Boloto Malyy Baykal                 |        1
+  Kolkhoz Krasnyy Baykal              |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Ozero Baykal                        |        1
+  Polevoy Stan Baykal                 |        1
+  Port Baykal                         |        1
+  Prud Novyy Baykal                   |        1
+  Sanatoriy Baykal                    |        1
+  Stantsiya Baykal                    |        1
+  Zaliv Baykal                        |        1
+  Baykalikha                          | 0.857143
+  Baykalo-Amurskaya Zheleznaya Doroga | 0.857143
+  Baykalovo                           | 0.857143
+  Baykalovo                           | 0.857143
+  Baykalovo                           | 0.857143
+  Baykalovo                           | 0.857143
+  Baykalovo                           | 0.857143
+  Baykalovo                           | 0.857143
+  Baykalovsk                          | 0.857143
+  Baykalovskiy                        | 0.857143
+  Baykalovskiy Rayon                  | 0.857143
+  Baykalsko                           | 0.857143
+  Maloye Baykalovo                    | 0.857143
+  Zabaykal                            | 0.714286
+  Bakal Batu                          | 0.571429
+  Zabaykalka                          | 0.571429
+  Zabaykalovskiy                      | 0.571429
+ (59 rows)
+ 
+ select t,substring_similarity('Kabankala',t) as sml from test_trgm2 where t %> 'Kabankala' order by sml desc, t;
+                 t                 |   sml    
+ ----------------------------------+----------
+  Kabankala                        |        1
+  Kabankala                        |        1
+  Kabankala                        |        1
+  Kabankala                        |        1
+  City of Kabankalan               |      0.9
+  Kabankalan                       |      0.9
+  Kabankalan                       |      0.9
+  Kabankalan                       |      0.9
+  Kabankalan                       |      0.9
+  Kabankalan City Public Plaza     |      0.9
+  Abankala                         |      0.7
+  Bankala                          |      0.6
+  Bankala Hill                     |      0.6
+  Gbonkobankala                    |      0.6
+  Ntombankala School               |      0.6
+  Sibankala                        |      0.6
+  Tombankala                       |      0.6
+  Kabakala                         | 0.583333
+  Bankalah                         |      0.5
+  Bankalan                         |      0.5
+  Bankalan                         |      0.5
+  Kamba-Kala                       |      0.5
+  Keur Samba Kala                  |      0.5
+  Nehalla Bankalah Reserved Forest |      0.5
+  Rokba Kala Sardoun               |      0.5
+ (25 rows)
+ 
+ select set_substring_limit(0.3);
+  set_substring_limit 
+ ---------------------
+                  0.3
+ (1 row)
+ 
+ select t,substring_similarity('Baykal',t) as sml from test_trgm2 where 'Baykal' <% t order by sml desc, t;
+                              t                             |   sml    
+ -----------------------------------------------------------+----------
+  Baykal                                                    |        1
+  Baykal                                                    |        1
+  Baykal                                                    |        1
+  Baykal                                                    |        1
+  Baykal                                                    |        1
+  Baykal                                                    |        1
+  Baykal                                                    |        1
+  Baykal                                                    |        1
+  Baykal                                                    |        1
+  Baykal                                                    |        1
+  Baykal                                                    |        1
+  Baykal                                                    |        1
+  Baykal                                                    |        1
+  Baykal                                                    |        1
+  Baykal                                                    |        1
+  Baykal                                                    |        1
+  Boloto Baykal                                             |        1
+  Boloto Baykal                                             |        1
+  Boloto Malyy Baykal                                       |        1
+  Kolkhoz Krasnyy Baykal                                    |        1
+  Ozero Baykal                                              |        1
+  Ozero Baykal                                              |        1
+  Ozero Baykal                                              |        1
+  Ozero Baykal                                              |        1
+  Ozero Baykal                                              |        1
+  Ozero Baykal                                              |        1
+  Ozero Baykal                                              |        1
+  Ozero Baykal                                              |        1
+  Ozero Baykal                                              |        1
+  Ozero Baykal                                              |        1
+  Ozero Baykal                                              |        1
+  Ozero Baykal                                              |        1
+  Ozero Baykal                                              |        1
+  Ozero Baykal                                              |        1
+  Ozero Baykal                                              |        1
+  Ozero Baykal                                              |        1
+  Polevoy Stan Baykal                                       |        1
+  Port Baykal                                               |        1
+  Prud Novyy Baykal                                         |        1
+  Sanatoriy Baykal                                          |        1
+  Stantsiya Baykal                                          |        1
+  Zaliv Baykal                                              |        1
+  Baykalikha                                                | 0.857143
+  Baykalo-Amurskaya Zheleznaya Doroga                       | 0.857143
+  Baykalovo                                                 | 0.857143
+  Baykalovo                                                 | 0.857143
+  Baykalovo                                                 | 0.857143
+  Baykalovo                                                 | 0.857143
+  Baykalovo                                                 | 0.857143
+  Baykalovo                                                 | 0.857143
+  Baykalovsk                                                | 0.857143
+  Baykalovskiy                                              | 0.857143
+  Baykalovskiy Rayon                                        | 0.857143
+  Baykalsko                                                 | 0.857143
+  Maloye Baykalovo                                          | 0.857143
+  Zabaykal                                                  | 0.714286
+  Bakal Batu                                                | 0.571429
+  Zabaykalka                                                | 0.571429
+  Zabaykalovskiy                                            | 0.571429
+  Air Bakal-kecil                                           | 0.444444
+  Bakal                                                     | 0.444444
+  Bakal                                                     | 0.444444
+  Bakal                                                     | 0.444444
+  Bakal                                                     | 0.444444
+  Bakal                                                     | 0.444444
+  Bakal                                                     | 0.444444
+  Bakal                                                     | 0.444444
+  Bakal                                                     | 0.444444
+  Bakal                                                     | 0.444444
+  Bakal                                                     | 0.444444
+  Bakal                                                     | 0.444444
+  Bakal                                                     | 0.444444
+  Bakal                                                     | 0.444444
+  Bakal                                                     | 0.444444
+  Bakal                                                     | 0.444444
+  Bakal                                                     | 0.444444
+  Bakal                                                     | 0.444444
+  Bakal                                                     | 0.444444
+  Bakal                                                     | 0.444444
+  Bakal                                                     | 0.444444
+  Bakal                                                     | 0.444444
+  Bakal                                                     | 0.444444
+  Bakal                                                     | 0.444444
+  Bakal                                                     | 0.444444
+  Bakal Dos                                                 | 0.444444
+  Bakal Julu                                                | 0.444444
+  Bakal Khel                                                | 0.444444
+  Bakal Lama                                                | 0.444444
+  Bakal Tres                                                | 0.444444
+  Bakal Uno                                                 | 0.444444
+  Daang Bakal                                               | 0.444444
+  Daang Bakal                                               | 0.444444
+  Desa Bakal                                                | 0.444444
+  Eat Bakal                                                 | 0.444444
+  Gunung Bakal                                              | 0.444444
+  Sidi Bakal                                                | 0.444444
+  Stantsiya Bakal                                           | 0.444444
+  Sungai Bakal                                              | 0.444444
+  Talang Bakal                                              | 0.444444
+  Uruk Bakal                                                | 0.444444
+  Zaouia Oulad Bakal                                        | 0.444444
+  Al Barkali                                                | 0.428571
+  Aparthotel Adagio Premium Dubai Al Barsha                 | 0.428571
+  Baikal Business Centre                                    | 0.428571
+  Bay of Backaland                                          | 0.428571
+  Boikalakalawa Bay                                         | 0.428571
+  Doubletree By Hilton Dubai Al Barsha Hotel and Res        | 0.428571
+  Doubletree By Hilton Hotel and Apartments Dubai Al Barsha | 0.428571
+  Doubletree Res.Dubai-Al Barsha                            | 0.428571
+  Holiday Inn Dubai Al Barsha                               | 0.428571
+  Holiday Inn Dubai Al Barsha                               | 0.428571
+  Jabal Barkal                                              | 0.428571
+  Novotel Dubai Al Barsha                                   | 0.428571
+  Park Inn By Radisson Dubai Al Barsha                      | 0.428571
+  Ramee Rose Hotel Dubai Al Barsha                          | 0.428571
+  Waikalabubu Bay                                           | 0.428571
+  Baikal                                                    |      0.4
+  Baikal                                                    |      0.4
+  Baikal Airfield                                           |      0.4
+  Baikal Hotel Moscow                                       |      0.4
+  Baikal Listvyanka Hotel                                   |      0.4
+  Baikal Mountains                                          |      0.4
+  Baikal Plaza                                              |      0.4
+  Bajkal                                                    |      0.4
+  Bankal                                                    |      0.4
+  Bankal                                                    |      0.4
+  Bankal                                                    |      0.4
+  Bankal School                                             |      0.4
+  Barkal                                                    |      0.4
+  Barkal                                                    |      0.4
+  Barkal                                                    |      0.4
+  Barkal                                                    |      0.4
+  Barkal                                                    |      0.4
+  Barkal                                                    |      0.4
+  Barkal                                                    |      0.4
+  Barkal                                                    |      0.4
+  Lake Baikal                                               |      0.4
+  Mbay Bakala                                               |      0.4
+  Oulad el Bakkal                                           |      0.4
+  Sidi Mohammed Bakkal                                      |      0.4
+  Bairkal                                                   | 0.363636
+  Bairkal Dhora                                             | 0.363636
+  Bairkal Jabal                                             | 0.363636
+  Batikal                                                   | 0.363636
+  Bakala                                                    | 0.333333
+  Bakala                                                    | 0.333333
+  Bakala                                                    | 0.333333
+  Bakala                                                    | 0.333333
+  Bakala                                                    | 0.333333
+  Bakala                                                    | 0.333333
+  Bakala                                                    | 0.333333
+  Bakala                                                    | 0.333333
+  Bakala                                                    | 0.333333
+  Bakala                                                    | 0.333333
+  Bakala                                                    | 0.333333
+  Bakala                                                    | 0.333333
+  Bakala                                                    | 0.333333
+  Bakala                                                    | 0.333333
+  Bakala                                                    | 0.333333
+  Bakala                                                    | 0.333333
+  Bakala                                                    | 0.333333
+  Bakala                                                    | 0.333333
+  Bakala                                                    | 0.333333
+  Bakala                                                    | 0.333333
+  Bakala                                                    | 0.333333
+  Bakala                                                    | 0.333333
+  Bakala                                                    | 0.333333
+  Bakala                                                    | 0.333333
+  Bakala                                                    | 0.333333
+  Bakala                                                    | 0.333333
+  Bakala                                                    | 0.333333
+  Bakala Koupi                                              | 0.333333
+  Bakalaale                                                 | 0.333333
+  Bakalabwa Pans                                            | 0.333333
+  Bakalaeng                                                 | 0.333333
+  Bakalafoulou                                              | 0.333333
+  Bakalalan Airport                                         | 0.333333
+  Bakalam                                                   | 0.333333
+  Bakalambani                                               | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan Barat                                             | 0.333333
+  Bakalan Dua                                               | 0.333333
+  Bakalan Kidul                                             | 0.333333
+  Bakalan Kidul                                             | 0.333333
+  Bakalan Kidul                                             | 0.333333
+  Bakalan Kulon                                             | 0.333333
+  Bakalan Kulon                                             | 0.333333
+  Bakalan Kulon                                             | 0.333333
+  Bakalan Lor                                               | 0.333333
+  Bakalan Lor                                               | 0.333333
+  Bakalan Lor                                               | 0.333333
+  Bakalan Lor                                               | 0.333333
+  Bakalan River                                             | 0.333333
+  Bakalan Tengah                                            | 0.333333
+  Bakalan Wetan                                             | 0.333333
+  Bakalan Wetan                                             | 0.333333
+  Bakalang                                                  | 0.333333
+  Bakalao Asibi Point                                       | 0.333333
+  Bakalao Point                                             | 0.333333
+  Bakalar Air Force Base (historical)                       | 0.333333
+  Bakalar Lake                                              | 0.333333
+  Bakalar Library                                           | 0.333333
+  Bakalarr                                                  | 0.333333
+  Bakalauri                                                 | 0.333333
+  Bakalauri1                                                | 0.333333
+  Bakalauri2                                                | 0.333333
+  Bakalauri3                                                | 0.333333
+  Bakalauri4                                                | 0.333333
+  Bakalauri5                                                | 0.333333
+  Bakalauri6                                                | 0.333333
+  Bakalauri7                                                | 0.333333
+  Bakalauri8                                                | 0.333333
+  Bakalauri9                                                | 0.333333
+  Bakalawa                                                  | 0.333333
+  Bakalbhar                                                 | 0.333333
+  Bakalbuah                                                 | 0.333333
+  Bakalda                                                   | 0.333333
+  Bakalda                                                   | 0.333333
+  Bakaldalam                                                | 0.333333
+  Bakaldalam                                                | 0.333333
+  Bakaldinskoye                                             | 0.333333
+  Bakaldovshchina                                           | 0.333333
+  Bakaldukuh                                                | 0.333333
+  Bakaldum                                                  | 0.333333
+  Bakaldy                                                   | 0.333333
+  Bakale                                                    | 0.333333
+  Bakale                                                    | 0.333333
+  Bakale                                                    | 0.333333
+  Bakale                                                    | 0.333333
+  Bakaleko                                                  | 0.333333
+  Bakalerek                                                 | 0.333333
+  Bakaley                                                   | 0.333333
+  Bakaleyka                                                 | 0.333333
+  Bakalha                                                   | 0.333333
+  Bakali                                                    | 0.333333
+  Bakali                                                    | 0.333333
+  Bakali                                                    | 0.333333
+  Bakalia Char                                              | 0.333333
+  Bakalica                                                  | 0.333333
+  Bakalica                                                  | 0.333333
+  Bakalinga                                                 | 0.333333
+  Bakalino                                                  | 0.333333
+  Bakalinskiy                                               | 0.333333
+  Bakalinskiy                                               | 0.333333
+  Bakalinskiy Leskhoz                                       | 0.333333
+  Bakalinskiy Rayon                                         | 0.333333
+  Bakalipur                                                 | 0.333333
+  Bakalite                                                  | 0.333333
+  Bakaljaya                                                 | 0.333333
+  Bakalka                                                   | 0.333333
+  Bakalka                                                   | 0.333333
+  Bakall                                                    | 0.333333
+  Bakalnica                                                 | 0.333333
+  Bakalod Island                                            | 0.333333
+  Bakalongo                                                 | 0.333333
+  Bakaloolay                                                | 0.333333
+  Bakalou                                                   | 0.333333
+  Bakalovina                                                | 0.333333
+  Bakalovina                                                | 0.333333
+  Bakalovka                                                 | 0.333333
+  Bakalovo                                                  | 0.333333
+  Bakalovo                                                  | 0.333333
+  Bakalovo                                                  | 0.333333
+  Bakalovskaya Ferma                                        | 0.333333
+  Bakalpakebo                                               | 0.333333
+  Bakalpokok                                                | 0.333333
+  Bakalrejo                                                 | 0.333333
+  Bakalsen                                                  | 0.333333
+  Bakalshile                                                | 0.333333
+  Bakaltua Bank                                             | 0.333333
+  Bakalua                                                   | 0.333333
+  Bakalukalu                                                | 0.333333
+  Bakalukalu Shan                                           | 0.333333
+  Bakalukudu                                                | 0.333333
+  Bakalum                                                   | 0.333333
+  Bakaly                                                    | 0.333333
+  Bakaly                                                    | 0.333333
+  Bakaly                                                    | 0.333333
+  Bakaly                                                    | 0.333333
+  Bakaly                                                    | 0.333333
+  Bakaly                                                    | 0.333333
+  Bakaly                                                    | 0.333333
+  Bakaly                                                    | 0.333333
+  Bakaly TV Mast                                            | 0.333333
+  Buur Bakale                                               | 0.333333
+  Buur Bakaley                                              | 0.333333
+  Columbus Bakalar Municipal Airport                        | 0.333333
+  Dakshin Bakalia                                           | 0.333333
+  Danau Bakalan                                             | 0.333333
+  Desa Bakalan                                              | 0.333333
+  Desa Bakalan                                              | 0.333333
+  Desa Bakalan                                              | 0.333333
+  Desa Bakalan                                              | 0.333333
+  Desa Bakalan                                              | 0.333333
+  Desa Bakalan                                              | 0.333333
+  Desa Bakalan                                              | 0.333333
+  Desa Bakalan                                              | 0.333333
+  Desa Bakalan                                              | 0.333333
+  Desa Bakalan                                              | 0.333333
+  Desa Bakalan                                              | 0.333333
+  Desa Bakalan                                              | 0.333333
+  Desa Bakalan                                              | 0.333333
+  Desa Bakalankrajan                                        | 0.333333
+  Desa Bakalankrapyak                                       | 0.333333
+  Desa Bakalanpule                                          | 0.333333
+  Desa Bakalanrayung                                        | 0.333333
+  Desa Bakalanwringinpitu                                   | 0.333333
+  Desa Bakalrejo                                            | 0.333333
+  Desa Bakalrejo                                            | 0.333333
+  Desa Bakalrejo                                            | 0.333333
+  Efrejtor Bakalovo                                         | 0.333333
+  Efreytor-Bakalovo                                         | 0.333333
+  Gora Bakalyadyr                                           | 0.333333
+  Gory Bakaly                                               | 0.333333
+  Gunung Bakalan                                            | 0.333333
+  Gunung Bakalan                                            | 0.333333
+  Ile Bakalibu                                              | 0.333333
+  Kali Bakalan                                              | 0.333333
+  Kali Bakalan                                              | 0.333333
+  Kali Bakalan                                              | 0.333333
+  Kampong Bakaladong                                        | 0.333333
+  Khor Bakallii                                             | 0.333333
+  Krajan Bakalan                                            | 0.333333
+  Kusu-Bakali                                               | 0.333333
+  Kwala Bakala                                              | 0.333333
+  Ngao Bakala                                               | 0.333333
+  Ngao Bakala                                               | 0.333333
+  Ovrag Bakalda                                             | 0.333333
+  Pematang Bakalpanang                                      | 0.333333
+  Pematang Bakalpanjang                                     | 0.333333
+  Pulau Bakalan                                             | 0.333333
+  Pulau Bakalanpauno                                        | 0.333333
+  Ragha Bakalzai                                            | 0.333333
+  Rodnik Bakalybulak                                        | 0.333333
+  Salu Bakalaeng                                            | 0.333333
+  Selat Bakalan                                             | 0.333333
+  Selat Bakalanpauno                                        | 0.333333
+  Sidi Mohammed el Bakali                                   | 0.333333
+  Sopka Bakaly                                              | 0.333333
+  Sovkhoz Bakalinskiy                                       | 0.333333
+  Sungai Bakala                                             | 0.333333
+  Sungai Bakaladiyan                                        | 0.333333
+  Tanjung Bakalinga                                         | 0.333333
+  Teluk Bakalan                                             | 0.333333
+  Teluk Bakalang                                            | 0.333333
+  Tubu Bakalekuk                                            | 0.333333
+  Tukad Bakalan                                             | 0.333333
+  Urochishche Bakalarnyn-Ayasy                              | 0.333333
+  Urochishche Bakaldikha                                    | 0.333333
+  Urochishche Bakalovo                                      | 0.333333
+  Urochishche Bakaly                                        | 0.333333
+  Bakkalmal                                                 | 0.307692
+  Alue Bakkala                                              |      0.3
+  Azib el Bakkali                                           |      0.3
+  Ba Kaliin                                                 |      0.3
+  Bagkalen                                                  |      0.3
+  Bahkalleh                                                 |      0.3
+  Baikalakko                                                |      0.3
+  Baikalovo                                                 |      0.3
+  Baikaluobbal                                              |      0.3
+  Bakkala Cemetery                                          |      0.3
+  Bakkalale                                                 |      0.3
+  Bakkalegskardet                                           |      0.3
+  Bakkalia                                                  |      0.3
+  Bakkalia                                                  |      0.3
+  Bakkalykkja                                               |      0.3
+  Bankala                                                   |      0.3
+  Bankala Hill                                              |      0.3
+  Bankalah                                                  |      0.3
+  Bankalan                                                  |      0.3
+  Bankalan                                                  |      0.3
+  Bankali                                                   |      0.3
+  Bankali                                                   |      0.3
+  Bankali                                                   |      0.3
+  Bankalol                                                  |      0.3
+  Barkala                                                   |      0.3
+  Barkala                                                   |      0.3
+  Barkala                                                   |      0.3
+  Barkala                                                   |      0.3
+  Barkala                                                   |      0.3
+  Barkala                                                   |      0.3
+  Barkala                                                   |      0.3
+  Barkala                                                   |      0.3
+  Barkala                                                   |      0.3
+  Barkala                                                   |      0.3
+  Barkala                                                   |      0.3
+  Barkala                                                   |      0.3
+  Barkala Park                                              |      0.3
+  Barkala Rao                                               |      0.3
+  Barkala Reserved Forest                                   |      0.3
+  Barkalabava                                               |      0.3
+  Barkaladja Pool                                           |      0.3
+  Barkalare                                                 |      0.3
+  Barkald                                                   |      0.3
+  Barkald                                                   |      0.3
+  Barkald                                                   |      0.3
+  Barkald stasjon                                           |      0.3
+  Barkalden                                                 |      0.3
+  Barkaldfossen                                             |      0.3
+  Barkaldvola                                               |      0.3
+  Barkale                                                   |      0.3
+  Barkale                                                   |      0.3
+  Barkaleh                                                  |      0.3
+  Barkaleitet                                               |      0.3
+  Barkali                                                   |      0.3
+  Barkali                                                   |      0.3
+  Barkallou                                                 |      0.3
+  Barkalne                                                  |      0.3
+  Barkalova                                                 |      0.3
+  Barkalovka                                                |      0.3
+  Barkalow Hollow                                           |      0.3
+  Baskalino                                                 |      0.3
+  Baskaltsi                                                 |      0.3
+  Baukala                                                   |      0.3
+  Bavkalasis                                                |      0.3
+  Bawkalut                                                  |      0.3
+  Bawkalut Chaung                                           |      0.3
+  Bikal                                                     |      0.3
+  Bikal                                                     |      0.3
+  Bikal                                                     |      0.3
+  Clifton T Barkalow Elementary School                      |      0.3
+  Gora Barkalova                                            |      0.3
+  Gora Barkalyu                                             |      0.3
+  Khrebet Batkali                                           |      0.3
+  Kordon Barkalo                                            |      0.3
+  Nehalla Bankalah Reserved Forest                          |      0.3
+  Ras Barkallah                                             |      0.3
+  Sopka Barkaleptskaya                                      |      0.3
+  Urochishche Batkali                                       |      0.3
+ (582 rows)
+ 
+ select t,substring_similarity('Kabankala',t) as sml from test_trgm2 where 'Kabankala' <% t order by sml desc, t;
+                 t                 |   sml    
+ ----------------------------------+----------
+  Kabankala                        |        1
+  Kabankala                        |        1
+  Kabankala                        |        1
+  Kabankala                        |        1
+  City of Kabankalan               |      0.9
+  Kabankalan                       |      0.9
+  Kabankalan                       |      0.9
+  Kabankalan                       |      0.9
+  Kabankalan                       |      0.9
+  Kabankalan City Public Plaza     |      0.9
+  Abankala                         |      0.7
+  Bankala                          |      0.6
+  Bankala Hill                     |      0.6
+  Gbonkobankala                    |      0.6
+  Ntombankala School               |      0.6
+  Sibankala                        |      0.6
+  Tombankala                       |      0.6
+  Kabakala                         | 0.583333
+  Bankalah                         |      0.5
+  Bankalan                         |      0.5
+  Bankalan                         |      0.5
+  Kamba-Kala                       |      0.5
+  Keur Samba Kala                  |      0.5
+  Nehalla Bankalah Reserved Forest |      0.5
+  Rokba Kala Sardoun               |      0.5
+  Kabikala                         | 0.461538
+  Buyamba-Kalala                   | 0.454545
+  Mwalaba-Kalamba                  | 0.454545
+  Bakala Koupi                     |      0.4
+  Bankal                           |      0.4
+  Bankal                           |      0.4
+  Bankal                           |      0.4
+  Bankal School                    |      0.4
+  Bankali                          |      0.4
+  Bankali                          |      0.4
+  Bankali                          |      0.4
+  Bankalol                         |      0.4
+  Jabba Kalai                      |      0.4
+  Kanampumba-Kalawa                |      0.4
+  Purba Kalaujan                   |      0.4
+  Tumba-Kalamba                    |      0.4
+  Daba Kalharereh                  | 0.363636
+  Gagaba Kalo                      | 0.363636
+  Jaba Kalle                       | 0.363636
+  Dabakala                         | 0.333333
+  Dalabakala                       | 0.333333
+  Kambakala                        | 0.333333
+  Ker Samba Kalla                  | 0.333333
+  Fayzabadkala                     | 0.307692
+  Gora Fayzabadkala                | 0.307692
+  Guba Kalgalaksha                 | 0.307692
+  Habakkala                        | 0.307692
+  Kaikalahun Indian Reserve 25     | 0.307692
+  Kaikalapettai                    | 0.307692
+  Alue Bakkala                     |      0.3
+  Ambadikala                       |      0.3
+  Ambadikala                       |      0.3
+  Ambakala Wewa                    |      0.3
+  Ataikala                         |      0.3
+  Ba Kaliin                        |      0.3
+  Bakala                           |      0.3
+  Bakala                           |      0.3
+  Bakala                           |      0.3
+  Bakala                           |      0.3
+  Bakala                           |      0.3
+  Bakala                           |      0.3
+  Bakala                           |      0.3
+  Bakala                           |      0.3
+  Bakala                           |      0.3
+  Bakala                           |      0.3
+  Bakala                           |      0.3
+  Bakala                           |      0.3
+  Bakala                           |      0.3
+  Bakala                           |      0.3
+  Bakala                           |      0.3
+  Bakala                           |      0.3
+  Bakala                           |      0.3
+  Bakala                           |      0.3
+  Bakala                           |      0.3
+  Bakala                           |      0.3
+  Bakala                           |      0.3
+  Bakala                           |      0.3
+  Bakala                           |      0.3
+  Bakala                           |      0.3
+  Bakala                           |      0.3
+  Bakala                           |      0.3
+  Bakala                           |      0.3
+  Bakkala Cemetery                 |      0.3
+  Bambakala                        |      0.3
+  Barkala                          |      0.3
+  Barkala                          |      0.3
+  Barkala                          |      0.3
+  Barkala                          |      0.3
+  Barkala                          |      0.3
+  Barkala                          |      0.3
+  Barkala                          |      0.3
+  Barkala                          |      0.3
+  Barkala                          |      0.3
+  Barkala                          |      0.3
+  Barkala                          |      0.3
+  Barkala                          |      0.3
+  Barkala Park                     |      0.3
+  Barkala Rao                      |      0.3
+  Barkala Reserved Forest          |      0.3
+  Baukala                          |      0.3
+  Beikala                          |      0.3
+  Beikala                          |      0.3
+  Bikala                           |      0.3
+  Bikala                           |      0.3
+  Bikala                           |      0.3
+  Bikala                           |      0.3
+  Bikala                           |      0.3
+  Bikala Madila                    |      0.3
+  Bomba-Kalende                    |      0.3
+  Bonagbakala                      |      0.3
+  Boyagbakala                      |      0.3
+  Bugor Arba-Kalgan                |      0.3
+  Bumba-Kaloki                     |      0.3
+  Bumba-Kalumba                    |      0.3
+  Darreh Pumba Kal                 |      0.3
+  Demba Kali                       |      0.3
+  Embatkala                        |      0.3
+  Gereba Kaler                     |      0.3
+  Golba Kalo                       |      0.3
+  Goth Soba Kaloi                  |      0.3
+  Guba Kaldo                       |      0.3
+  Guba Kalita                      |      0.3
+  Gulba Kalle                      |      0.3
+  Haikala                          |      0.3
+  Haikala                          |      0.3
+  Kali Bakalan                     |      0.3
+  Kali Bakalan                     |      0.3
+  Kali Bakalan                     |      0.3
+  Kali Purbakala                   |      0.3
+  Kalibakal                        |      0.3
+  Kalibakalako                     |      0.3
+  Kalimundubakalan                 |      0.3
+  Kamba-Kalele                     |      0.3
+  Kimbakala                        |      0.3
+  Kombakala                        |      0.3
+  Kwala Bakala                     |      0.3
+  Laikala                          |      0.3
+  Maikala Range                    |      0.3
+  Mambakala                        |      0.3
+  Matamba-Kalenga                  |      0.3
+  Matamba-Kalenge                  |      0.3
+  Mbay Bakala                      |      0.3
+  Mount Tohebakala                 |      0.3
+  Naikala                          |      0.3
+  Ngao Bakala                      |      0.3
+  Ngao Bakala                      |      0.3
+  Purba Kalmegha                   |      0.3
+  Purba Kalmegha                   |      0.3
+  Sungai Bakala                    |      0.3
+  Tagobikala                       |      0.3
+  Tanjung Batikala                 |      0.3
+  Tombakala                        |      0.3
+  Tsibakala                        |      0.3
+  Tumba-Kalumba                    |      0.3
+  Tumba-Kalunga                    |      0.3
+  Waikala                          |      0.3
+ (161 rows)
+ 
+ select t,substring_similarity('Baykal',t) as sml from test_trgm2 where t %> 'Baykal' order by sml desc, t;
+                              t                             |   sml    
+ -----------------------------------------------------------+----------
+  Baykal                                                    |        1
+  Baykal                                                    |        1
+  Baykal                                                    |        1
+  Baykal                                                    |        1
+  Baykal                                                    |        1
+  Baykal                                                    |        1
+  Baykal                                                    |        1
+  Baykal                                                    |        1
+  Baykal                                                    |        1
+  Baykal                                                    |        1
+  Baykal                                                    |        1
+  Baykal                                                    |        1
+  Baykal                                                    |        1
+  Baykal                                                    |        1
+  Baykal                                                    |        1
+  Baykal                                                    |        1
+  Boloto Baykal                                             |        1
+  Boloto Baykal                                             |        1
+  Boloto Malyy Baykal                                       |        1
+  Kolkhoz Krasnyy Baykal                                    |        1
+  Ozero Baykal                                              |        1
+  Ozero Baykal                                              |        1
+  Ozero Baykal                                              |        1
+  Ozero Baykal                                              |        1
+  Ozero Baykal                                              |        1
+  Ozero Baykal                                              |        1
+  Ozero Baykal                                              |        1
+  Ozero Baykal                                              |        1
+  Ozero Baykal                                              |        1
+  Ozero Baykal                                              |        1
+  Ozero Baykal                                              |        1
+  Ozero Baykal                                              |        1
+  Ozero Baykal                                              |        1
+  Ozero Baykal                                              |        1
+  Ozero Baykal                                              |        1
+  Ozero Baykal                                              |        1
+  Polevoy Stan Baykal                                       |        1
+  Port Baykal                                               |        1
+  Prud Novyy Baykal                                         |        1
+  Sanatoriy Baykal                                          |        1
+  Stantsiya Baykal                                          |        1
+  Zaliv Baykal                                              |        1
+  Baykalikha                                                | 0.857143
+  Baykalo-Amurskaya Zheleznaya Doroga                       | 0.857143
+  Baykalovo                                                 | 0.857143
+  Baykalovo                                                 | 0.857143
+  Baykalovo                                                 | 0.857143
+  Baykalovo                                                 | 0.857143
+  Baykalovo                                                 | 0.857143
+  Baykalovo                                                 | 0.857143
+  Baykalovsk                                                | 0.857143
+  Baykalovskiy                                              | 0.857143
+  Baykalovskiy Rayon                                        | 0.857143
+  Baykalsko                                                 | 0.857143
+  Maloye Baykalovo                                          | 0.857143
+  Zabaykal                                                  | 0.714286
+  Bakal Batu                                                | 0.571429
+  Zabaykalka                                                | 0.571429
+  Zabaykalovskiy                                            | 0.571429
+  Air Bakal-kecil                                           | 0.444444
+  Bakal                                                     | 0.444444
+  Bakal                                                     | 0.444444
+  Bakal                                                     | 0.444444
+  Bakal                                                     | 0.444444
+  Bakal                                                     | 0.444444
+  Bakal                                                     | 0.444444
+  Bakal                                                     | 0.444444
+  Bakal                                                     | 0.444444
+  Bakal                                                     | 0.444444
+  Bakal                                                     | 0.444444
+  Bakal                                                     | 0.444444
+  Bakal                                                     | 0.444444
+  Bakal                                                     | 0.444444
+  Bakal                                                     | 0.444444
+  Bakal                                                     | 0.444444
+  Bakal                                                     | 0.444444
+  Bakal                                                     | 0.444444
+  Bakal                                                     | 0.444444
+  Bakal                                                     | 0.444444
+  Bakal                                                     | 0.444444
+  Bakal                                                     | 0.444444
+  Bakal                                                     | 0.444444
+  Bakal                                                     | 0.444444
+  Bakal                                                     | 0.444444
+  Bakal Dos                                                 | 0.444444
+  Bakal Julu                                                | 0.444444
+  Bakal Khel                                                | 0.444444
+  Bakal Lama                                                | 0.444444
+  Bakal Tres                                                | 0.444444
+  Bakal Uno                                                 | 0.444444
+  Daang Bakal                                               | 0.444444
+  Daang Bakal                                               | 0.444444
+  Desa Bakal                                                | 0.444444
+  Eat Bakal                                                 | 0.444444
+  Gunung Bakal                                              | 0.444444
+  Sidi Bakal                                                | 0.444444
+  Stantsiya Bakal                                           | 0.444444
+  Sungai Bakal                                              | 0.444444
+  Talang Bakal                                              | 0.444444
+  Uruk Bakal                                                | 0.444444
+  Zaouia Oulad Bakal                                        | 0.444444
+  Al Barkali                                                | 0.428571
+  Aparthotel Adagio Premium Dubai Al Barsha                 | 0.428571
+  Baikal Business Centre                                    | 0.428571
+  Bay of Backaland                                          | 0.428571
+  Boikalakalawa Bay                                         | 0.428571
+  Doubletree By Hilton Dubai Al Barsha Hotel and Res        | 0.428571
+  Doubletree By Hilton Hotel and Apartments Dubai Al Barsha | 0.428571
+  Doubletree Res.Dubai-Al Barsha                            | 0.428571
+  Holiday Inn Dubai Al Barsha                               | 0.428571
+  Holiday Inn Dubai Al Barsha                               | 0.428571
+  Jabal Barkal                                              | 0.428571
+  Novotel Dubai Al Barsha                                   | 0.428571
+  Park Inn By Radisson Dubai Al Barsha                      | 0.428571
+  Ramee Rose Hotel Dubai Al Barsha                          | 0.428571
+  Waikalabubu Bay                                           | 0.428571
+  Baikal                                                    |      0.4
+  Baikal                                                    |      0.4
+  Baikal Airfield                                           |      0.4
+  Baikal Hotel Moscow                                       |      0.4
+  Baikal Listvyanka Hotel                                   |      0.4
+  Baikal Mountains                                          |      0.4
+  Baikal Plaza                                              |      0.4
+  Bajkal                                                    |      0.4
+  Bankal                                                    |      0.4
+  Bankal                                                    |      0.4
+  Bankal                                                    |      0.4
+  Bankal School                                             |      0.4
+  Barkal                                                    |      0.4
+  Barkal                                                    |      0.4
+  Barkal                                                    |      0.4
+  Barkal                                                    |      0.4
+  Barkal                                                    |      0.4
+  Barkal                                                    |      0.4
+  Barkal                                                    |      0.4
+  Barkal                                                    |      0.4
+  Lake Baikal                                               |      0.4
+  Mbay Bakala                                               |      0.4
+  Oulad el Bakkal                                           |      0.4
+  Sidi Mohammed Bakkal                                      |      0.4
+  Bairkal                                                   | 0.363636
+  Bairkal Dhora                                             | 0.363636
+  Bairkal Jabal                                             | 0.363636
+  Batikal                                                   | 0.363636
+  Bakala                                                    | 0.333333
+  Bakala                                                    | 0.333333
+  Bakala                                                    | 0.333333
+  Bakala                                                    | 0.333333
+  Bakala                                                    | 0.333333
+  Bakala                                                    | 0.333333
+  Bakala                                                    | 0.333333
+  Bakala                                                    | 0.333333
+  Bakala                                                    | 0.333333
+  Bakala                                                    | 0.333333
+  Bakala                                                    | 0.333333
+  Bakala                                                    | 0.333333
+  Bakala                                                    | 0.333333
+  Bakala                                                    | 0.333333
+  Bakala                                                    | 0.333333
+  Bakala                                                    | 0.333333
+  Bakala                                                    | 0.333333
+  Bakala                                                    | 0.333333
+  Bakala                                                    | 0.333333
+  Bakala                                                    | 0.333333
+  Bakala                                                    | 0.333333
+  Bakala                                                    | 0.333333
+  Bakala                                                    | 0.333333
+  Bakala                                                    | 0.333333
+  Bakala                                                    | 0.333333
+  Bakala                                                    | 0.333333
+  Bakala                                                    | 0.333333
+  Bakala Koupi                                              | 0.333333
+  Bakalaale                                                 | 0.333333
+  Bakalabwa Pans                                            | 0.333333
+  Bakalaeng                                                 | 0.333333
+  Bakalafoulou                                              | 0.333333
+  Bakalalan Airport                                         | 0.333333
+  Bakalam                                                   | 0.333333
+  Bakalambani                                               | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan                                                   | 0.333333
+  Bakalan Barat                                             | 0.333333
+  Bakalan Dua                                               | 0.333333
+  Bakalan Kidul                                             | 0.333333
+  Bakalan Kidul                                             | 0.333333
+  Bakalan Kidul                                             | 0.333333
+  Bakalan Kulon                                             | 0.333333
+  Bakalan Kulon                                             | 0.333333
+  Bakalan Kulon                                             | 0.333333
+  Bakalan Lor                                               | 0.333333
+  Bakalan Lor                                               | 0.333333
+  Bakalan Lor                                               | 0.333333
+  Bakalan Lor                                               | 0.333333
+  Bakalan River                                             | 0.333333
+  Bakalan Tengah                                            | 0.333333
+  Bakalan Wetan                                             | 0.333333
+  Bakalan Wetan                                             | 0.333333
+  Bakalang                                                  | 0.333333
+  Bakalao Asibi Point                                       | 0.333333
+  Bakalao Point                                             | 0.333333
+  Bakalar Air Force Base (historical)                       | 0.333333
+  Bakalar Lake                                              | 0.333333
+  Bakalar Library                                           | 0.333333
+  Bakalarr                                                  | 0.333333
+  Bakalauri                                                 | 0.333333
+  Bakalauri1                                                | 0.333333
+  Bakalauri2                                                | 0.333333
+  Bakalauri3                                                | 0.333333
+  Bakalauri4                                                | 0.333333
+  Bakalauri5                                                | 0.333333
+  Bakalauri6                                                | 0.333333
+  Bakalauri7                                                | 0.333333
+  Bakalauri8                                                | 0.333333
+  Bakalauri9                                                | 0.333333
+  Bakalawa                                                  | 0.333333
+  Bakalbhar                                                 | 0.333333
+  Bakalbuah                                                 | 0.333333
+  Bakalda                                                   | 0.333333
+  Bakalda                                                   | 0.333333
+  Bakaldalam                                                | 0.333333
+  Bakaldalam                                                | 0.333333
+  Bakaldinskoye                                             | 0.333333
+  Bakaldovshchina                                           | 0.333333
+  Bakaldukuh                                                | 0.333333
+  Bakaldum                                                  | 0.333333
+  Bakaldy                                                   | 0.333333
+  Bakale                                                    | 0.333333
+  Bakale                                                    | 0.333333
+  Bakale                                                    | 0.333333
+  Bakale                                                    | 0.333333
+  Bakaleko                                                  | 0.333333
+  Bakalerek                                                 | 0.333333
+  Bakaley                                                   | 0.333333
+  Bakaleyka                                                 | 0.333333
+  Bakalha                                                   | 0.333333
+  Bakali                                                    | 0.333333
+  Bakali                                                    | 0.333333
+  Bakali                                                    | 0.333333
+  Bakalia Char                                              | 0.333333
+  Bakalica                                                  | 0.333333
+  Bakalica                                                  | 0.333333
+  Bakalinga                                                 | 0.333333
+  Bakalino                                                  | 0.333333
+  Bakalinskiy                                               | 0.333333
+  Bakalinskiy                                               | 0.333333
+  Bakalinskiy Leskhoz                                       | 0.333333
+  Bakalinskiy Rayon                                         | 0.333333
+  Bakalipur                                                 | 0.333333
+  Bakalite                                                  | 0.333333
+  Bakaljaya                                                 | 0.333333
+  Bakalka                                                   | 0.333333
+  Bakalka                                                   | 0.333333
+  Bakall                                                    | 0.333333
+  Bakalnica                                                 | 0.333333
+  Bakalod Island                                            | 0.333333
+  Bakalongo                                                 | 0.333333
+  Bakaloolay                                                | 0.333333
+  Bakalou                                                   | 0.333333
+  Bakalovina                                                | 0.333333
+  Bakalovina                                                | 0.333333
+  Bakalovka                                                 | 0.333333
+  Bakalovo                                                  | 0.333333
+  Bakalovo                                                  | 0.333333
+  Bakalovo                                                  | 0.333333
+  Bakalovskaya Ferma                                        | 0.333333
+  Bakalpakebo                                               | 0.333333
+  Bakalpokok                                                | 0.333333
+  Bakalrejo                                                 | 0.333333
+  Bakalsen                                                  | 0.333333
+  Bakalshile                                                | 0.333333
+  Bakaltua Bank                                             | 0.333333
+  Bakalua                                                   | 0.333333
+  Bakalukalu                                                | 0.333333
+  Bakalukalu Shan                                           | 0.333333
+  Bakalukudu                                                | 0.333333
+  Bakalum                                                   | 0.333333
+  Bakaly                                                    | 0.333333
+  Bakaly                                                    | 0.333333
+  Bakaly                                                    | 0.333333
+  Bakaly                                                    | 0.333333
+  Bakaly                                                    | 0.333333
+  Bakaly                                                    | 0.333333
+  Bakaly                                                    | 0.333333
+  Bakaly                                                    | 0.333333
+  Bakaly TV Mast                                            | 0.333333
+  Buur Bakale                                               | 0.333333
+  Buur Bakaley                                              | 0.333333
+  Columbus Bakalar Municipal Airport                        | 0.333333
+  Dakshin Bakalia                                           | 0.333333
+  Danau Bakalan                                             | 0.333333
+  Desa Bakalan                                              | 0.333333
+  Desa Bakalan                                              | 0.333333
+  Desa Bakalan                                              | 0.333333
+  Desa Bakalan                                              | 0.333333
+  Desa Bakalan                                              | 0.333333
+  Desa Bakalan                                              | 0.333333
+  Desa Bakalan                                              | 0.333333
+  Desa Bakalan                                              | 0.333333
+  Desa Bakalan                                              | 0.333333
+  Desa Bakalan                                              | 0.333333
+  Desa Bakalan                                              | 0.333333
+  Desa Bakalan                                              | 0.333333
+  Desa Bakalan                                              | 0.333333
+  Desa Bakalankrajan                                        | 0.333333
+  Desa Bakalankrapyak                                       | 0.333333
+  Desa Bakalanpule                                          | 0.333333
+  Desa Bakalanrayung                                        | 0.333333
+  Desa Bakalanwringinpitu                                   | 0.333333
+  Desa Bakalrejo                                            | 0.333333
+  Desa Bakalrejo                                            | 0.333333
+  Desa Bakalrejo                                            | 0.333333
+  Efrejtor Bakalovo                                         | 0.333333
+  Efreytor-Bakalovo                                         | 0.333333
+  Gora Bakalyadyr                                           | 0.333333
+  Gory Bakaly                                               | 0.333333
+  Gunung Bakalan                                            | 0.333333
+  Gunung Bakalan                                            | 0.333333
+  Ile Bakalibu                                              | 0.333333
+  Kali Bakalan                                              | 0.333333
+  Kali Bakalan                                              | 0.333333
+  Kali Bakalan                                              | 0.333333
+  Kampong Bakaladong                                        | 0.333333
+  Khor Bakallii                                             | 0.333333
+  Krajan Bakalan                                            | 0.333333
+  Kusu-Bakali                                               | 0.333333
+  Kwala Bakala                                              | 0.333333
+  Ngao Bakala                                               | 0.333333
+  Ngao Bakala                                               | 0.333333
+  Ovrag Bakalda                                             | 0.333333
+  Pematang Bakalpanang                                      | 0.333333
+  Pematang Bakalpanjang                                     | 0.333333
+  Pulau Bakalan                                             | 0.333333
+  Pulau Bakalanpauno                                        | 0.333333
+  Ragha Bakalzai                                            | 0.333333
+  Rodnik Bakalybulak                                        | 0.333333
+  Salu Bakalaeng                                            | 0.333333
+  Selat Bakalan                                             | 0.333333
+  Selat Bakalanpauno                                        | 0.333333
+  Sidi Mohammed el Bakali                                   | 0.333333
+  Sopka Bakaly                                              | 0.333333
+  Sovkhoz Bakalinskiy                                       | 0.333333
+  Sungai Bakala                                             | 0.333333
+  Sungai Bakaladiyan                                        | 0.333333
+  Tanjung Bakalinga                                         | 0.333333
+  Teluk Bakalan                                             | 0.333333
+  Teluk Bakalang                                            | 0.333333
+  Tubu Bakalekuk                                            | 0.333333
+  Tukad Bakalan                                             | 0.333333
+  Urochishche Bakalarnyn-Ayasy                              | 0.333333
+  Urochishche Bakaldikha                                    | 0.333333
+  Urochishche Bakalovo                                      | 0.333333
+  Urochishche Bakaly                                        | 0.333333
+  Bakkalmal                                                 | 0.307692
+  Alue Bakkala                                              |      0.3
+  Azib el Bakkali                                           |      0.3
+  Ba Kaliin                                                 |      0.3
+  Bagkalen                                                  |      0.3
+  Bahkalleh                                                 |      0.3
+  Baikalakko                                                |      0.3
+  Baikalovo                                                 |      0.3
+  Baikaluobbal                                              |      0.3
+  Bakkala Cemetery                                          |      0.3
+  Bakkalale                                                 |      0.3
+  Bakkalegskardet                                           |      0.3
+  Bakkalia                                                  |      0.3
+  Bakkalia                                                  |      0.3
+  Bakkalykkja                                               |      0.3
+  Bankala                                                   |      0.3
+  Bankala Hill                                              |      0.3
+  Bankalah                                                  |      0.3
+  Bankalan                                                  |      0.3
+  Bankalan                                                  |      0.3
+  Bankali                                                   |      0.3
+  Bankali                                                   |      0.3
+  Bankali                                                   |      0.3
+  Bankalol                                                  |      0.3
+  Barkala                                                   |      0.3
+  Barkala                                                   |      0.3
+  Barkala                                                   |      0.3
+  Barkala                                                   |      0.3
+  Barkala                                                   |      0.3
+  Barkala                                                   |      0.3
+  Barkala                                                   |      0.3
+  Barkala                                                   |      0.3
+  Barkala                                                   |      0.3
+  Barkala                                                   |      0.3
+  Barkala                                                   |      0.3
+  Barkala                                                   |      0.3
+  Barkala Park                                              |      0.3
+  Barkala Rao                                               |      0.3
+  Barkala Reserved Forest                                   |      0.3
+  Barkalabava                                               |      0.3
+  Barkaladja Pool                                           |      0.3
+  Barkalare                                                 |      0.3
+  Barkald                                                   |      0.3
+  Barkald                                                   |      0.3
+  Barkald                                                   |      0.3
+  Barkald stasjon                                           |      0.3
+  Barkalden                                                 |      0.3
+  Barkaldfossen                                             |      0.3
+  Barkaldvola                                               |      0.3
+  Barkale                                                   |      0.3
+  Barkale                                                   |      0.3
+  Barkaleh                                                  |      0.3
+  Barkaleitet                                               |      0.3
+  Barkali                                                   |      0.3
+  Barkali                                                   |      0.3
+  Barkallou                                                 |      0.3
+  Barkalne                                                  |      0.3
+  Barkalova                                                 |      0.3
+  Barkalovka                                                |      0.3
+  Barkalow Hollow                                           |      0.3
+  Baskalino                                                 |      0.3
+  Baskaltsi                                                 |      0.3
+  Baukala                                                   |      0.3
+  Bavkalasis                                                |      0.3
+  Bawkalut                                                  |      0.3
+  Bawkalut Chaung                                           |      0.3
+  Bikal                                                     |      0.3
+  Bikal                                                     |      0.3
+  Bikal                                                     |      0.3
+  Clifton T Barkalow Elementary School                      |      0.3
+  Gora Barkalova                                            |      0.3
+  Gora Barkalyu                                             |      0.3
+  Khrebet Batkali                                           |      0.3
+  Kordon Barkalo                                            |      0.3
+  Nehalla Bankalah Reserved Forest                          |      0.3
+  Ras Barkallah                                             |      0.3
+  Sopka Barkaleptskaya                                      |      0.3
+  Urochishche Batkali                                       |      0.3
+ (582 rows)
+ 
+ select t,substring_similarity('Kabankala',t) as sml from test_trgm2 where t %> 'Kabankala' order by sml desc, t;
+                 t                 |   sml    
+ ----------------------------------+----------
+  Kabankala                        |        1
+  Kabankala                        |        1
+  Kabankala                        |        1
+  Kabankala                        |        1
+  City of Kabankalan               |      0.9
+  Kabankalan                       |      0.9
+  Kabankalan                       |      0.9
+  Kabankalan                       |      0.9
+  Kabankalan                       |      0.9
+  Kabankalan City Public Plaza     |      0.9
+  Abankala                         |      0.7
+  Bankala                          |      0.6
+  Bankala Hill                     |      0.6
+  Gbonkobankala                    |      0.6
+  Ntombankala School               |      0.6
+  Sibankala                        |      0.6
+  Tombankala                       |      0.6
+  Kabakala                         | 0.583333
+  Bankalah                         |      0.5
+  Bankalan                         |      0.5
+  Bankalan                         |      0.5
+  Kamba-Kala                       |      0.5
+  Keur Samba Kala                  |      0.5
+  Nehalla Bankalah Reserved Forest |      0.5
+  Rokba Kala Sardoun               |      0.5
+  Kabikala                         | 0.461538
+  Buyamba-Kalala                   | 0.454545
+  Mwalaba-Kalamba                  | 0.454545
+  Bakala Koupi                     |      0.4
+  Bankal                           |      0.4
+  Bankal                           |      0.4
+  Bankal                           |      0.4
+  Bankal School                    |      0.4
+  Bankali                          |      0.4
+  Bankali                          |      0.4
+  Bankali                          |      0.4
+  Bankalol                         |      0.4
+  Jabba Kalai                      |      0.4
+  Kanampumba-Kalawa                |      0.4
+  Purba Kalaujan                   |      0.4
+  Tumba-Kalamba                    |      0.4
+  Daba Kalharereh                  | 0.363636
+  Gagaba Kalo                      | 0.363636
+  Jaba Kalle                       | 0.363636
+  Dabakala                         | 0.333333
+  Dalabakala                       | 0.333333
+  Kambakala                        | 0.333333
+  Ker Samba Kalla                  | 0.333333
+  Fayzabadkala                     | 0.307692
+  Gora Fayzabadkala                | 0.307692
+  Guba Kalgalaksha                 | 0.307692
+  Habakkala                        | 0.307692
+  Kaikalahun Indian Reserve 25     | 0.307692
+  Kaikalapettai                    | 0.307692
+  Alue Bakkala                     |      0.3
+  Ambadikala                       |      0.3
+  Ambadikala                       |      0.3
+  Ambakala Wewa                    |      0.3
+  Ataikala                         |      0.3
+  Ba Kaliin                        |      0.3
+  Bakala                           |      0.3
+  Bakala                           |      0.3
+  Bakala                           |      0.3
+  Bakala                           |      0.3
+  Bakala                           |      0.3
+  Bakala                           |      0.3
+  Bakala                           |      0.3
+  Bakala                           |      0.3
+  Bakala                           |      0.3
+  Bakala                           |      0.3
+  Bakala                           |      0.3
+  Bakala                           |      0.3
+  Bakala                           |      0.3
+  Bakala                           |      0.3
+  Bakala                           |      0.3
+  Bakala                           |      0.3
+  Bakala                           |      0.3
+  Bakala                           |      0.3
+  Bakala                           |      0.3
+  Bakala                           |      0.3
+  Bakala                           |      0.3
+  Bakala                           |      0.3
+  Bakala                           |      0.3
+  Bakala                           |      0.3
+  Bakala                           |      0.3
+  Bakala                           |      0.3
+  Bakala                           |      0.3
+  Bakkala Cemetery                 |      0.3
+  Bambakala                        |      0.3
+  Barkala                          |      0.3
+  Barkala                          |      0.3
+  Barkala                          |      0.3
+  Barkala                          |      0.3
+  Barkala                          |      0.3
+  Barkala                          |      0.3
+  Barkala                          |      0.3
+  Barkala                          |      0.3
+  Barkala                          |      0.3
+  Barkala                          |      0.3
+  Barkala                          |      0.3
+  Barkala                          |      0.3
+  Barkala Park                     |      0.3
+  Barkala Rao                      |      0.3
+  Barkala Reserved Forest          |      0.3
+  Baukala                          |      0.3
+  Beikala                          |      0.3
+  Beikala                          |      0.3
+  Bikala                           |      0.3
+  Bikala                           |      0.3
+  Bikala                           |      0.3
+  Bikala                           |      0.3
+  Bikala                           |      0.3
+  Bikala Madila                    |      0.3
+  Bomba-Kalende                    |      0.3
+  Bonagbakala                      |      0.3
+  Boyagbakala                      |      0.3
+  Bugor Arba-Kalgan                |      0.3
+  Bumba-Kaloki                     |      0.3
+  Bumba-Kalumba                    |      0.3
+  Darreh Pumba Kal                 |      0.3
+  Demba Kali                       |      0.3
+  Embatkala                        |      0.3
+  Gereba Kaler                     |      0.3
+  Golba Kalo                       |      0.3
+  Goth Soba Kaloi                  |      0.3
+  Guba Kaldo                       |      0.3
+  Guba Kalita                      |      0.3
+  Gulba Kalle                      |      0.3
+  Haikala                          |      0.3
+  Haikala                          |      0.3
+  Kali Bakalan                     |      0.3
+  Kali Bakalan                     |      0.3
+  Kali Bakalan                     |      0.3
+  Kali Purbakala                   |      0.3
+  Kalibakal                        |      0.3
+  Kalibakalako                     |      0.3
+  Kalimundubakalan                 |      0.3
+  Kamba-Kalele                     |      0.3
+  Kimbakala                        |      0.3
+  Kombakala                        |      0.3
+  Kwala Bakala                     |      0.3
+  Laikala                          |      0.3
+  Maikala Range                    |      0.3
+  Mambakala                        |      0.3
+  Matamba-Kalenga                  |      0.3
+  Matamba-Kalenge                  |      0.3
+  Mbay Bakala                      |      0.3
+  Mount Tohebakala                 |      0.3
+  Naikala                          |      0.3
+  Ngao Bakala                      |      0.3
+  Ngao Bakala                      |      0.3
+  Purba Kalmegha                   |      0.3
+  Purba Kalmegha                   |      0.3
+  Sungai Bakala                    |      0.3
+  Tagobikala                       |      0.3
+  Tanjung Batikala                 |      0.3
+  Tombakala                        |      0.3
+  Tsibakala                        |      0.3
+  Tumba-Kalumba                    |      0.3
+  Tumba-Kalunga                    |      0.3
+  Waikala                          |      0.3
+ (161 rows)
+ 
*** a/contrib/pg_trgm/expected/pg_trgm.out
--- b/contrib/pg_trgm/expected/pg_trgm.out
***************
*** 59,65 **** select similarity('---', '####---');
            0
  (1 row)
  
! CREATE TABLE test_trgm(t text);
  \copy test_trgm from 'data/trgm.data'
  select t,similarity(t,'qwertyu0988') as sml from test_trgm where t % 'qwertyu0988' order by sml desc, t;
        t      |   sml    
--- 59,65 ----
            0
  (1 row)
  
! CREATE TABLE test_trgm(t text COLLATE "C");
  \copy test_trgm from 'data/trgm.data'
  select t,similarity(t,'qwertyu0988') as sml from test_trgm where t % 'qwertyu0988' order by sml desc, t;
        t      |   sml    
***************
*** 3467,3473 **** select t,similarity(t,'gwertyu1988') as sml from test_trgm where t % 'gwertyu198
   qwertyu0988 | 0.333333
  (1 row)
  
! create table test2(t text);
  insert into test2 values ('abcdef');
  insert into test2 values ('quark');
  insert into test2 values ('  z foo bar');
--- 3467,3473 ----
   qwertyu0988 | 0.333333
  (1 row)
  
! create table test2(t text COLLATE "C");
  insert into test2 values ('abcdef');
  insert into test2 values ('quark');
  insert into test2 values ('  z foo bar');
*** /dev/null
--- b/contrib/pg_trgm/sql/pg_substring_trgm.sql
***************
*** 0 ****
--- 1,37 ----
+ CREATE TABLE test_trgm2(t text COLLATE "C");
+ 
+ \copy test_trgm2 from 'data/trgm2.data'
+ 
+ select t,substring_similarity('Baykal',t) as sml from test_trgm2 where 'Baykal' <% t order by sml desc, t;
+ select t,substring_similarity('Kabankala',t) as sml from test_trgm2 where 'Kabankala' <% t order by sml desc, t;
+ select t,substring_similarity('Baykal',t) as sml from test_trgm2 where t %> 'Baykal' order by sml desc, t;
+ select t,substring_similarity('Kabankala',t) as sml from test_trgm2 where t %> 'Kabankala' order by sml desc, t;
+ 
+ create index trgm_idx2 on test_trgm2 using gist (t gist_trgm_ops);
+ set enable_seqscan=off;
+ 
+ select t,substring_similarity('Baykal',t) as sml from test_trgm2 where 'Baykal' <% t order by sml desc, t;
+ select t,substring_similarity('Kabankala',t) as sml from test_trgm2 where 'Kabankala' <% t order by sml desc, t;
+ select t,substring_similarity('Baykal',t) as sml from test_trgm2 where t %> 'Baykal' order by sml desc, t;
+ select t,substring_similarity('Kabankala',t) as sml from test_trgm2 where t %> 'Kabankala' order by sml desc, t;
+ 
+ drop index trgm_idx2;
+ create index trgm_idx2 on test_trgm2 using gin (t gin_trgm_ops);
+ set enable_seqscan=off;
+ 
+ select t,substring_similarity('Baykal',t) as sml from test_trgm2 where 'Baykal' <% t order by sml desc, t;
+ select t,substring_similarity('Kabankala',t) as sml from test_trgm2 where 'Kabankala' <% t order by sml desc, t;
+ select t,substring_similarity('Baykal',t) as sml from test_trgm2 where t %> 'Baykal' order by sml desc, t;
+ select t,substring_similarity('Kabankala',t) as sml from test_trgm2 where t %> 'Kabankala' order by sml desc, t;
+ 
+ select set_substring_limit(0.5);
+ select t,substring_similarity('Baykal',t) as sml from test_trgm2 where 'Baykal' <% t order by sml desc, t;
+ select t,substring_similarity('Kabankala',t) as sml from test_trgm2 where 'Kabankala' <% t order by sml desc, t;
+ select t,substring_similarity('Baykal',t) as sml from test_trgm2 where t %> 'Baykal' order by sml desc, t;
+ select t,substring_similarity('Kabankala',t) as sml from test_trgm2 where t %> 'Kabankala' order by sml desc, t;
+ 
+ select set_substring_limit(0.3);
+ select t,substring_similarity('Baykal',t) as sml from test_trgm2 where 'Baykal' <% t order by sml desc, t;
+ select t,substring_similarity('Kabankala',t) as sml from test_trgm2 where 'Kabankala' <% t order by sml desc, t;
+ select t,substring_similarity('Baykal',t) as sml from test_trgm2 where t %> 'Baykal' order by sml desc, t;
+ select t,substring_similarity('Kabankala',t) as sml from test_trgm2 where t %> 'Kabankala' order by sml desc, t;
*** a/contrib/pg_trgm/sql/pg_trgm.sql
--- b/contrib/pg_trgm/sql/pg_trgm.sql
***************
*** 13,19 **** select similarity('wow',' WOW ');
  
  select similarity('---', '####---');
  
! CREATE TABLE test_trgm(t text);
  
  \copy test_trgm from 'data/trgm.data'
  
--- 13,19 ----
  
  select similarity('---', '####---');
  
! CREATE TABLE test_trgm(t text COLLATE "C");
  
  \copy test_trgm from 'data/trgm.data'
  
***************
*** 40,46 **** select t,similarity(t,'qwertyu0988') as sml from test_trgm where t % 'qwertyu098
  select t,similarity(t,'gwertyu0988') as sml from test_trgm where t % 'gwertyu0988' order by sml desc, t;
  select t,similarity(t,'gwertyu1988') as sml from test_trgm where t % 'gwertyu1988' order by sml desc, t;
  
! create table test2(t text);
  insert into test2 values ('abcdef');
  insert into test2 values ('quark');
  insert into test2 values ('  z foo bar');
--- 40,46 ----
  select t,similarity(t,'gwertyu0988') as sml from test_trgm where t % 'gwertyu0988' order by sml desc, t;
  select t,similarity(t,'gwertyu1988') as sml from test_trgm where t % 'gwertyu1988' order by sml desc, t;
  
! create table test2(t text COLLATE "C");
  insert into test2 values ('abcdef');
  insert into test2 values ('quark');
  insert into test2 values ('  z foo bar');
