Re: Latest PostgreSQL on Raspbian Jessie - solved

-----Original Message-----
From: Adrian Klaver [mailto:adrian.klaver@aklaver.com]
Sent: Thursday, February 23, 2017 5:25 PM
To: Ertan Küçükoğlu <ertan.kucukoglu@1nar.com.tr>;
pgsql-general@postgresql.org
Subject: Re: [GENERAL] Latest PostgreSQL on Raspbian Jessie

On 02/23/2017 06:08 AM, Ertan Küçükoğlu wrote:

-----Original Message-----
From: pgsql-general-owner@postgresql.org
[mailto:pgsql-general-owner@postgresql.org] On Behalf Of Adrian Klaver
Sent: Thursday, February 23, 2017 3:55 PM
To: Ertan Küçükoğlu <ertan.kucukoglu@1nar.com.tr>;
pgsql-general@postgresql.org
Subject: Re: [GENERAL] Latest PostgreSQL on Raspbian Jessie

Hi,

Sorry about not indenting. Have to use Outlook as e-mail app.

I cannot show any work at the moment, I am just researching right now,
before I start actual job. I have a single form making connection to
local PostgreSQL and remote one. Local seems to be OK in all respects.
Remote is a problem.

Below you can see some psql output.

postgres@raspberrypi:~$ psql -d test -U postgres -p 5432 -h
192.168.1.105 Password for user postgres:
DEBUG: CommitTransaction
DEBUG: name: unnamed; blockState: STARTED; state: INPROGR,
xid/subid/cid: 0/1/0, nestlvl: 1, children:
psql (9.4.10, server 9.6.1)
WARNING: psql major version 9.4, server major version 9.6.
Some psql features might not work.
Type "help" for help.

test=# select count(*) from sale;
DEBUG: StartTransactionCommand
DEBUG: StartTransaction
DEBUG: name: unnamed; blockState: DEFAULT; state: INPROGR,
xid/subid/cid: 0/1/0, nestlvl: 1, children:
DEBUG: CommitTransactionCommand
DEBUG: CommitTransaction
DEBUG: name: unnamed; blockState: STARTED; state: INPROGR,
xid/subid/cid: 0/1/0, nestlvl: 1, children:
count
--------
176588
(1 row)

test=#

Btw, I am surprised that psql can make a connection *and* runs a query
just fine.

Yeah with the caveat:

"Some psql features might not work."

The older version of psql does not 'know' about new features in 9.6.

My main problem with my application is to run a query. Connection
seems to be OK. Trying to run a query and my application simply freeze.

So the issue is with the Postgres library that Lazarus/FreePascal is using.

What would that library be?

PgAdmin3 gives lots of error messages some objects missing, assertion
failures, etc. After all these messages PgAdmin3 seems to establish a
connection to PostgreSQL 9.6 database on Windows OS. However, PgAdmin3
cannot run a query, too. When I try to do a select, PgAdmin3 freeze.
Waiting only kills my application, or PgAdmin3. No log messages that I can

find of.

Not all that surprising as pgAdmin3 is no longer supported:

https://www.pgadmin.org/download/source.php

As you found out, I don't think the last version of pgAdmin3 is compatible
with 9.6.

Thanks.
-Ertan

Problem solved,

Actually, library works just fine as I indicated that I am not having any
problem with local database connection which is also over TCP/IP
(localhost).

It turned out that I was doing a "simple" select * from query on a table
with more than 1.6 million rows. Obviously, Raspberry Pi memory can't handle
such a result set. After changing my source of select table into a smaller
one things started to be smooth and nice.

Sorry about all the fuss.

Thanks.
-Ertan

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