Added/Updated tests\bugs\gh_7727_test.py: Checked on 5.0.0.1183, 4.0.4.2983 (intermediate snapshots).

tests/bugs/gh_7727_test.py

@@ -0,0 +1,53 @@
+#coding:utf-8
+
+"""
+ID:          issue-7727
+ISSUE:       https://github.com/FirebirdSQL/firebird/issues/7727
+TITLE:       Index for integer column cannot be used when INT128/DECFLOAT value is being searched
+DESCRIPTION:
+NOTES:
+    [31.08.2023] pzotov
+    Confirmed problem on 5.0.0.1177, 4.0.4.2979
+    Checked on 5.0.0.1183, 4.0.4.2983 (intermediate snapshots).
+"""
+
+import pytest
+from firebird.qa import *
+
+db = db_factory()
+
+test_script = f"""
+    recreate table test_a (
+        id bigint not null,
+        constraint pk_test primary key(id)
+    );
+
+    recreate table test_b (
+        id bigint not null,
+        constraint pk_test_b primary key(id)
+    );
+
+
+    set plan on;
+
+    select ta.id, tb.id
+    from test_a ta
+    left join test_b tb on tb.id = ta.id / cast(1000 as int128);
+
+    select ta.id, tb.id
+    from test_a ta
+    left join test_b tb on tb.id = ta.id / cast(1000 as decfloat);
+"""
+
+act = isql_act('db', test_script)
+
+expected_stdout = f"""
+    PLAN JOIN (TA NATURAL, TB INDEX (PK_TEST_B))
+    PLAN JOIN (TA NATURAL, TB INDEX (PK_TEST_B))
+"""
+
+@pytest.mark.version('>=4.0.4')
+def test_1(act: Action):
+    act.expected_stdout = expected_stdout
+    act.execute(combine_output = True)
+    assert act.clean_stdout == act.clean_expected_stdout