Added/Updated tests\bugs\gh_7482_test.py: Checked on 5.0.0.958, intermediate build of 24-feb-2023. All OK.

tests/bugs/gh_7482_test.py

@@ -0,0 +1,36 @@
+#coding:utf-8
+
+"""
+ID:          issue-7482
+ISSUE:       7482
+TITLE:       Simple SQL crashes firebird: select cast(rdb$db_key as integer) from rdb$database
+NOTES:
+    [14.02.2023] pzotov
+    Checked on 5.0.0.958, intermediate build of 24-feb-2023. All OK.
+"""
+
+import pytest
+from firebird.qa import *
+
+db = db_factory()
+
+test_script = """
+    set list on;
+    set blob all;
+    set sqlda_display on;
+    select blob_append(null, null) as blob_result from rdb$database;
+"""
+
+act = isql_act('db', test_script, substitutions = [('^((?!sqltype:|BLOB_RESULT).)*$', ''), ('[ \t]+', ' ')])
+
+expected_stdout = """
+    01: sqltype: 520 BLOB Nullable scale: 0 subtype: 0 len: 8
+    :  name: BLOB_APPEND  alias: BLOB_RESULT
+    BLOB_RESULT              <null>
+"""
+
+@pytest.mark.version('>=5.0')
+def test_1(act: Action):
+    act.expected_stdout = expected_stdout
+    act.execute()
+    assert act.clean_stdout == act.clean_expected_stdout