# # Show what happens during ALTER TABLE when an existing file # exists in the target location. # # Bug #19218794: IF TABLESPACE EXISTS, CAN'T CREATE TABLE, # BUT CAN ALTER ENGINE=INNODB # CREATE TABLE t1 (a SERIAL, b CHAR(10)) ENGINE=Memory; INSERT INTO t1(b) VALUES('one'), ('two'), ('three'); # # Create a file called MYSQLD_DATADIR/test/t1.ibd # Directory listing of test/*.ibd # t1.ibd ALTER TABLE t1 ENGINE = InnoDB; ERROR HY000: Error on rename of 'OLD_FILE_NAME' to 'NEW_FILE_NAME' (errno: 184 - Tablespace already exists) # # Move the file to InnoDB as t2 # ALTER TABLE t1 RENAME TO t2, ENGINE = INNODB; SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `a` bigint(20) unsigned NOT NULL AUTO_INCREMENT, `b` char(10) DEFAULT NULL, UNIQUE KEY `a` (`a`) ) ENGINE=InnoDB AUTO_INCREMENT=4 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci SELECT * from t2; a b 1 one 2 two 3 three # # Try to rename t2 to t1 with an existing t1 in the way. # ALTER TABLE t2 RENAME TO t1; ERROR HY000: Error on rename of 'OLD_FILE_NAME' to 'NEW_FILE_NAME' (errno: 184 - Tablespace already exists) # # Create another t1, but in the system tablespace. # SET GLOBAL innodb_file_per_table=OFF; CREATE TABLE t1 (a SERIAL, b CHAR(20)) ENGINE=InnoDB; INSERT INTO t1(b) VALUES('one'), ('two'), ('three'); SHOW CREATE TABLE t1; Table Create Table t1 CREATE TABLE `t1` ( `a` bigint(20) unsigned NOT NULL AUTO_INCREMENT, `b` char(20) DEFAULT NULL, UNIQUE KEY `a` (`a`) ) ENGINE=InnoDB AUTO_INCREMENT=4 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci SELECT name, space_type FROM information_schema.innodb_tables WHERE name = 'test/t1'; name space_type test/t1 System # # ALTER TABLE from system tablespace to system tablespace # ALTER TABLE t1 ADD COLUMN c INT, ALGORITHM=INPLACE; ALTER TABLE t1 ADD COLUMN d INT, ALGORITHM=COPY; # # Try to move t1 from the system tablespace to a file-per-table # while a blocking t1.ibd file exists. # SET GLOBAL innodb_file_per_table=ON; # # Move using TABLESPACE=innodb_file_per_table # SET GLOBAL innodb_file_per_table=OFF; ALTER TABLE t1 TABLESPACE=innodb_file_per_table, ALGORITHM=INPLACE; ERROR HY000: Tablespace 'test/t1' exists. ALTER TABLE t1 TABLESPACE=innodb_file_per_table, ALGORITHM=COPY; ERROR HY000: Error on rename of 'OLD_FILE_NAME' to 'NEW_FILE_NAME' (errno: 184 - Tablespace already exists) # # ALTER TABLE t1 from system tablespace to general tablespace # CREATE TABLESPACE s1 ADD DATAFILE 's1.ibd'; ALTER TABLE t1 TABLESPACE s1; # # Try to move t1 from a general tablespace to a file-per-table # while a blocking t1.ibd file exists. # ALTER TABLE t1 TABLESPACE=innodb_file_per_table, ALGORITHM=INPLACE; ERROR HY000: Tablespace 'test/t1' exists. ALTER TABLE t1 TABLESPACE=innodb_file_per_table, ALGORITHM=COPY; ERROR HY000: Error on rename of 'OLD_FILE_NAME' to 'NEW_FILE_NAME' (errno: 184 - Tablespace already exists) # # Delete the blocking file called MYSQLD_DATADIR/test/t1.ibd # Move t1 to file-per-table using ALGORITHM=INPLACE with no blocking t1.ibd. # SET GLOBAL innodb_file_per_table=ON; ALTER TABLE t1 ADD COLUMN e INT, ALGORITHM=INPLACE; SHOW CREATE TABLE t1; Table Create Table t1 CREATE TABLE `t1` ( `a` bigint(20) unsigned NOT NULL AUTO_INCREMENT, `b` char(20) DEFAULT NULL, `c` int(11) DEFAULT NULL, `d` int(11) DEFAULT NULL, `e` int(11) DEFAULT NULL, UNIQUE KEY `a` (`a`) ) /*!50100 TABLESPACE `s1` */ ENGINE=InnoDB AUTO_INCREMENT=4 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci SELECT name, space_type FROM information_schema.innodb_tables WHERE name = 'test/t1'; name space_type test/t1 General SET GLOBAL innodb_file_per_table=OFF; # # Move t1 back to the system tablespace using ALGORITHM=INPLACE. # ALTER TABLE t1 TABLESPACE=innodb_system, ALGORITHM=INPLACE; SELECT name, space_type FROM information_schema.innodb_tables WHERE name = 'test/t1'; name space_type test/t1 System # # Move t1 to a general tablespace using ALGORITHM=INPLACE. # ALTER TABLE t1 TABLESPACE=s1, ALGORITHM=INPLACE; SELECT name, space_type FROM information_schema.innodb_tables WHERE name = 'test/t1'; name space_type test/t1 General # # Move t1 to a file-per-table tablespace using ALGORITHM=INPLACE. # ALTER TABLE t1 TABLESPACE=innodb_file_per_table, ALGORITHM=INPLACE; SELECT name, space_type FROM information_schema.innodb_tables WHERE name = 'test/t1'; name space_type test/t1 Single # # Move t1 to a general tablespace using ALGORITHM=COPY. # ALTER TABLE t1 TABLESPACE=s1, ALGORITHM=COPY; SELECT name, space_type FROM information_schema.innodb_tables WHERE name = 'test/t1'; name space_type test/t1 General # # Move t1 back to the system tablespace using ALGORITHM=COPY. # ALTER TABLE t1 TABLESPACE=innodb_system, ALGORITHM=COPY; SELECT name, space_type FROM information_schema.innodb_tables WHERE name = 'test/t1'; name space_type test/t1 System # # Move t1 to a file-per-table tablespace using ALGORITHM=COPY. # ALTER TABLE t1 TABLESPACE=innodb_file_per_table, ALGORITHM=COPY; SELECT name, space_type FROM information_schema.innodb_tables WHERE name = 'test/t1'; name space_type test/t1 Single DROP TABLE t1; # # Rename t2.ibd to t1.ibd. # ALTER TABLE t2 RENAME TO t1; SELECT name, space_type FROM information_schema.innodb_tables WHERE name = 'test/t1'; name space_type test/t1 Single SELECT * from t1; a b 1 one 2 two 3 three # # Rename this file-per-table from test.t1 to test2.t2. # CREATE DATABASE test2; ALTER TABLE test.t1 RENAME TO test2.t2; SELECT name, space_type FROM information_schema.innodb_tables WHERE name = 'test%'; name space_type # # Also try the RENAME TABLE syntax. # CREATE DATABASE test3; RENAME TABLE test2.t2 TO test3.t3; SELECT name, space_type FROM information_schema.innodb_tables WHERE name = 'test%'; name space_type # # Cleanup # DROP TABLE test3.t3; DROP TABLESPACE s1; DROP DATABASE test2; DROP DATABASE test3;