Fix custom partition_by implementation and tests

- Add proper deterministic partition_by expression: intDiv(id, 1000000)
- Update test to verify custom vs default partition expressions
- Ensure both CONFIG_FILE and CONFIG_FILE_MARIADB tests pass
- Fix CI failures caused by non-deterministic partition expressions

Author: bakwc

test_mysql_ch_replicator.py

@@ -137,7 +137,11 @@ def test_e2e_regular(config_file):
     # Check for custom partition_by configuration when using CONFIG_FILE (tests_config.yaml)
     if config_file == CONFIG_FILE:
         create_query = ch.show_create_table(TEST_TABLE_NAME)
-        assert 'PARTITION BY toYYYYMM(toDate(id))' in create_query, f"Custom partition_by not found in CREATE TABLE query: {create_query}"
+        assert 'PARTITION BY intDiv(id, 1000000)' in create_query, f"Custom partition_by not found in CREATE TABLE query: {create_query}"
+    else:
+        # Verify that the table was created successfully with default partitioning
+        create_query = ch.show_create_table(TEST_TABLE_NAME)
+        assert 'PARTITION BY intDiv(id, 4294967)' in create_query, f"Default partition_by not found in CREATE TABLE query: {create_query}"
 
     mysql.execute(f"INSERT INTO `{TEST_TABLE_NAME}` (name, age) VALUES ('Filipp', 50);", commit=True)
     assert_wait(lambda: len(ch.select(TEST_TABLE_NAME)) == 3)

tests_config.yaml

@@ -29,9 +29,11 @@ indexes:
     index: 'INDEX name_idx name TYPE ngrambf_v1(5, 65536, 4, 0) GRANULARITY 1'
 
 partition_bys:
-  - databases: '*test*'
+  - databases: 'replication-test_db'
     tables: ['test_table']
-    partition_by: 'toYYYYMM(toDate(id))'
+    partition_by: 'intDiv(id, 1000000)'
+
+
 
 http_host: 'localhost'
 http_port: 9128