From 0288223e268f16255b8754be9a60588ddc7006c9 Mon Sep 17 00:00:00 2001
From: Arseniy Mukhin <arseniy.mukhin.dev@gmail.com>
Date: Wed, 2 Jul 2025 10:29:14 +0300
Subject: [PATCH v4 8/8] Add rounding cases tests for float4

---
 contrib/btree_gin/expected/float4.out | 88 +++++++++++++++++++++++++++
 contrib/btree_gin/sql/float4.sql      | 15 +++++
 2 files changed, 103 insertions(+)

diff --git a/contrib/btree_gin/expected/float4.out b/contrib/btree_gin/expected/float4.out
index 02c88e4007d..ac04a1e2198 100644
--- a/contrib/btree_gin/expected/float4.out
+++ b/contrib/btree_gin/expected/float4.out
@@ -269,3 +269,91 @@ SELECT * FROM test_float4 WHERE i>'NaN'::float8 ORDER BY i;
 ---
 (0 rows)
 
+-- Check rounding cases
+-- 1e-300 rounds to 0 for float4 but not for float8
+SELECT * FROM test_float4 WHERE i < -1e-300::float8 ORDER BY i;
+     i     
+-----------
+ -Infinity
+        -2
+        -1
+(3 rows)
+
+SELECT * FROM test_float4 WHERE i <= -1e-300::float8 ORDER BY i;
+     i     
+-----------
+ -Infinity
+        -2
+        -1
+(3 rows)
+
+SELECT * FROM test_float4 WHERE i = -1e-300::float8 ORDER BY i;
+ i 
+---
+(0 rows)
+
+SELECT * FROM test_float4 WHERE i > -1e-300::float8 ORDER BY i;
+    i     
+----------
+        0
+        1
+        2
+        3
+ Infinity
+      NaN
+(6 rows)
+
+SELECT * FROM test_float4 WHERE i >= -1e-300::float8 ORDER BY i;
+    i     
+----------
+        0
+        1
+        2
+        3
+ Infinity
+      NaN
+(6 rows)
+
+SELECT * FROM test_float4 WHERE i < 1e-300::float8 ORDER BY i;
+     i     
+-----------
+ -Infinity
+        -2
+        -1
+         0
+(4 rows)
+
+SELECT * FROM test_float4 WHERE i <= 1e-300::float8 ORDER BY i;
+     i     
+-----------
+ -Infinity
+        -2
+        -1
+         0
+(4 rows)
+
+SELECT * FROM test_float4 WHERE i = 1e-300::float8 ORDER BY i;
+ i 
+---
+(0 rows)
+
+SELECT * FROM test_float4 WHERE i > 1e-300::float8 ORDER BY i;
+    i     
+----------
+        1
+        2
+        3
+ Infinity
+      NaN
+(5 rows)
+
+SELECT * FROM test_float4 WHERE i >= 1e-300::float8 ORDER BY i;
+    i     
+----------
+        1
+        2
+        3
+ Infinity
+      NaN
+(5 rows)
+
diff --git a/contrib/btree_gin/sql/float4.sql b/contrib/btree_gin/sql/float4.sql
index e850e1a0588..cbda77f26a4 100644
--- a/contrib/btree_gin/sql/float4.sql
+++ b/contrib/btree_gin/sql/float4.sql
@@ -50,3 +50,18 @@ SELECT * FROM test_float4 WHERE i<='NaN'::float8 ORDER BY i;
 SELECT * FROM test_float4 WHERE i='NaN'::float8 ORDER BY i;
 SELECT * FROM test_float4 WHERE i>='NaN'::float8 ORDER BY i;
 SELECT * FROM test_float4 WHERE i>'NaN'::float8 ORDER BY i;
+
+-- Check rounding cases
+-- 1e-300 rounds to 0 for float4 but not for float8
+
+SELECT * FROM test_float4 WHERE i < -1e-300::float8 ORDER BY i;
+SELECT * FROM test_float4 WHERE i <= -1e-300::float8 ORDER BY i;
+SELECT * FROM test_float4 WHERE i = -1e-300::float8 ORDER BY i;
+SELECT * FROM test_float4 WHERE i > -1e-300::float8 ORDER BY i;
+SELECT * FROM test_float4 WHERE i >= -1e-300::float8 ORDER BY i;
+
+SELECT * FROM test_float4 WHERE i < 1e-300::float8 ORDER BY i;
+SELECT * FROM test_float4 WHERE i <= 1e-300::float8 ORDER BY i;
+SELECT * FROM test_float4 WHERE i = 1e-300::float8 ORDER BY i;
+SELECT * FROM test_float4 WHERE i > 1e-300::float8 ORDER BY i;
+SELECT * FROM test_float4 WHERE i >= 1e-300::float8 ORDER BY i;
-- 
2.43.0