; ERROR 00000: Key column 'c0' doesn't exist in table ALTER TABLE t0n ADD INDEX(c0), CHANGE c0 c0 INT, ALGORITHM=INPLACE; ### files in MYSQL_DATA_DIR/test fts_aux_index_0.ibd fts_aux_index_0.ibd fts_aux_index_0.ibd fts_aux_index_0.ibd fts_aux_index_0.ibd fts_aux_index_0.ibd fts_aux_being_deleted.ibd fts_aux_being_deleted_cache.ibd fts_aux_config.ibd fts_aux_deleted.ibd fts_aux_deleted_cache.ibd sys_foreign.ibd sys_indexes.ibd sys_tables.ibd t0n.ibd t0o.ibd ### files in MYSQL_TMP_DIR/alt_dir/test fts_aux_index_0.ibd fts_aux_index_0.ibd fts_aux_index_0.ibd fts_aux_index_0.ibd fts_aux_index_0.ibd fts_aux_index_0.ibd fts_aux_being_deleted.ibd fts_aux_being_deleted_cache.ibd fts_aux_config.ibd fts_aux_deleted.ibd fts_aux_deleted_cache.ibd t0c.ibd t0p.ibd tt.ibd SHOW CREATE TABLE t0n; Table Create Table t0n CREATE TABLE `t0n` (   `c0` int NOT NULL,   `c0` int DEFAULT NULL,   `ct` text,   PRIMARY KEY (`c0`),   KEY `c0` (`c0`),   FULLTEXT KEY `ct` (`ct`) ) ENGINE=InnoDB DEFAULT CHARSET=utf0mb0 COLLATE=utf0mb0_0000_ai_ci ALTER TABLE t0n 