Added/Updated tests\bugs\gh_8628_test.py: Checked on 6.0.0.1020, 5.0.3.1683

Author: pavel-zotov

tests/bugs/gh_8628_test.py

@@ -0,0 +1,99 @@
+#coding:utf-8
+
+"""
+ID:          n/a
+ISSUE:       https://github.com/FirebirdSQL/firebird/issues/8628
+TITLE:       Incorrect join order for JOIN LATERAL with UNION referencing the outer stream(s) via its select list
+DESCRIPTION:
+NOTES:
+    [17.07.2025] pzotov
+    SQL schema name (introduced since 6.0.0.834), single and double quotes are suppressed in the output.
+    See $QA_HOME/README.substitutions.md or https://github.com/FirebirdSQL/firebird-qa/blob/master/README.substitutions.md
+    Confirmed problem on 6.0.0.877, 5.0.3.1622
+    Checked on 6.0.0.1020, 5.0.3.1683
+"""
+
+import pytest
+from firebird.qa import *
+from firebird.driver import DatabaseError
+
+db = db_factory()
+
+substitutions = []
+# QA_GLOBALS -- dict, is defined in qa/plugin.py, obtain settings
+# from act.files_dir/'test_config.ini':
+#
+addi_subst_settings = QA_GLOBALS['schema_n_quotes_suppress']
+addi_subst_tokens = addi_subst_settings['addi_subst']
+
+for p in addi_subst_tokens.split(' '):
+    substitutions.append( (p, '') )
+
+act = python_act('db', substitutions = substitutions)
+
+#-----------------------------------------------------------
+
+def replace_leading(source, char="."):
+    stripped = source.lstrip()
+    return char * (len(source) - len(stripped)) + stripped
+
+#-----------------------------------------------------------
+
+@pytest.mark.version('>=5.0.3')
+def test_1(act: Action, capsys):
+
+    qry_list = (
+        """
+            select t.name
+            from rdb$relations r
+            cross join lateral (
+                select r.rdb$relation_name as name from rdb$database
+                union all
+                select r.rdb$owner_name as name from rdb$database
+            ) t
+        """,
+    )
+
+    with act.db.connect() as con:
+        cur = con.cursor()
+        for test_sql in qry_list:
+            ps, rs =  None, None
+            try:
+                cur = con.cursor()
+                ps = cur.prepare(test_sql)
+                print(test_sql)
+                # Print explained plan with padding eash line by dots in order to see indentations:
+                print( '\n'.join([replace_leading(s) for s in ps.detailed_plan.split('\n')]) )
+
+                # ::: NB ::: 'ps' returns data, i.e. this is SELECTABLE expression.
+                # We have to store result of cur.execute(<psInstance>) in order to
+                # close it explicitly.
+                # Otherwise AV can occur during Python garbage collection and this
+                # causes pytest to hang on its final point.
+                # Explained by hvlad, email 26.10.24 17:42
+                rs = cur.execute(ps)
+                for r in rs:
+                    pass
+                print('Fetching completed.')
+            except DatabaseError as e:
+                print(e.__str__())
+                print(e.gds_codes)
+            finally:
+                if rs:
+                    rs.close() # <<< EXPLICITLY CLOSING CURSOR RESULTS
+                if ps:
+                    ps.free()
+
+    act.expected_stdout = f"""
+        {qry_list[0]}
+        Select Expression
+        ....-> Nested Loop Join (inner)
+        ........-> Table RDB$RELATIONS as R Full Scan
+        ........-> Union
+        ............-> Table RDB$DATABASE as T RDB$DATABASE Full Scan
+        ............-> Table RDB$DATABASE as T RDB$DATABASE Full Scan
+        Fetching completed.
+    """
+
+    act.stdout = capsys.readouterr().out
+    assert act.clean_stdout == act.clean_expected_stdout