fix unittest error

Author: waketzheng

tests/schema/test_generate_schema.py

@@ -726,8 +726,8 @@ async def test_index_safe(self):
     `full_text` LONGTEXT NOT NULL,
     `geometry` GEOMETRY NOT NULL
 ) CHARACTER SET utf8mb4;
-CREATE FULLTEXT INDEX IF NOT EXISTS `idx_index_full_te_3caba4` ON `index` (`full_text`) WITH PARSER ngram;
-CREATE SPATIAL INDEX IF NOT EXISTS `idx_index_geometr_0b4dfb` ON `index` (`geometry`);""",
+CREATE FULLTEXT INDEX `idx_index_full_te_3caba4` ON `index` (`full_text`) WITH PARSER ngram;
+CREATE SPATIAL INDEX `idx_index_geometr_0b4dfb` ON `index` (`geometry`);""",
         )
 
     async def test_index_unsafe(self):