Added/Updated tests\bugs\gh_7758_test.py: Checked on 6.0.0.76. Currently one need to make RECONNECT after this change, otherwise behaviour remains unchanged

tests/bugs/gh_7758_test.py

@@ -0,0 +1,90 @@
+#coding:utf-8
+
+"""
+ID:          issue-7427
+ISSUE:       https://github.com/FirebirdSQL/firebird/pull/7427
+TITLE:       Added the ability to change function DETERMINISTIC option without recompile the entire function body
+DESCRIPTION: 
+    ALTER FUNCTION <name> {DETERMINISTIC | NOT DETERMINISTIC}
+    doc/sql.extensions/README.ddl.txt
+NOTES:
+    [09.10.2023] pzotov
+    1. Test verifies ability to change DETERMINISTIC attribute and actual behaviour of function after this action.
+    2. ::: NB ::: Currently one need to make RECONNECT after this change, otherwise behaviour remains unchanged
+       (see: https://github.com/FirebirdSQL/firebird/issues/7427#issuecomment-1753095418 ).
+
+    Checked on 6.0.0.76.
+"""
+
+import pytest
+from firebird.qa import *
+
+db = db_factory()
+
+test_script = """
+    set list on;
+    create sequence g start with 0;
+    commit;
+    set term ^;
+    create function fn_test returns int deterministic
+    as
+    begin
+        return gen_id(g,1);
+    end
+    ^
+    commit
+    ^
+
+    create procedure sp_test returns(curr_gen int) as
+        declare n int = 10;
+        declare i int;
+    begin
+        while (n > 0) do
+        begin
+            i = fn_test();
+            n = n - 1;
+        end
+        curr_gen = gen_id(g,0);
+        suspend;
+    end
+    ^
+    select p.curr_gen as gen_determ_initial from sp_test p
+    ^
+    commit
+    ^
+    alter sequence g restart with 0
+    ^
+    alter function fn_test not deterministic
+    ^
+    commit
+    ^
+    CONNECT $(DSN)
+    ^
+    select p.curr_gen as gen_non_deterministic from sp_test p
+    ^
+    alter sequence g restart with 0
+    ^
+    alter function fn_test deterministic
+    ^
+    commit
+    ^
+    CONNECT $(DSN)
+    ^
+    select p.curr_gen as gen_determ_returned from sp_test p
+    ^
+
+"""
+
+act = isql_act('db', test_script)
+
+expected_stdout = """
+    GEN_DETERM_INITIAL              0
+    GEN_NON_DETERMINISTIC           9
+    GEN_DETERM_RETURNED             0
+"""
+
+@pytest.mark.version('>=6.0')
+def test_1(act: Action):
+    act.expected_stdout = expected_stdout
+    act.execute(combine_output = True)
+    assert act.clean_stdout == act.clean_expected_stdout