Fix handling add unique index (#110)

Author: bakwc

mysql_ch_replicator/converter.py

@@ -448,13 +448,13 @@ def convert_alter_query(self, mysql_query, db_name):
                 tokens = tokens[1:]
 
             if op_name == 'add':
-                if tokens[0].lower() in ('constraint', 'index', 'foreign'):
+                if tokens[0].lower() in ('constraint', 'index', 'foreign', 'unique'):
                     continue
                 self.__convert_alter_table_add_column(db_name, table_name, tokens)
                 continue
 
             if op_name == 'drop':
-                if tokens[0].lower() in ('constraint', 'index', 'foreign'):
+                if tokens[0].lower() in ('constraint', 'index', 'foreign', 'unique'):
                     continue
                 self.__convert_alter_table_drop_column(db_name, table_name, tokens)
                 continue

test_mysql_ch_replicator.py

@@ -137,6 +137,9 @@ def test_e2e_regular(config_file):
     mysql.execute(f"ALTER TABLE `{TEST_TABLE_NAME}` ADD `last_name` varchar(255); ")
     mysql.execute(f"ALTER TABLE `{TEST_TABLE_NAME}` ADD `price` decimal(10,2) DEFAULT NULL; ")
 
+    mysql.execute(f"ALTER TABLE `{TEST_TABLE_NAME}` ADD UNIQUE INDEX prise_idx (price)")
+    mysql.execute(f"ALTER TABLE `{TEST_TABLE_NAME}` DROP INDEX prise_idx, ADD UNIQUE INDEX age_idx (age)")
+
     mysql.execute(f"INSERT INTO `{TEST_TABLE_NAME}` (name, age, last_name, price) VALUES ('Mary', 24, 'Smith', 3.2);", commit=True)
 
     assert_wait(lambda: len(ch.select(TEST_TABLE_NAME)) == 4)