Describe the bug

The migration contains invalid MySQL. Applying it produces the following error:

Error in query (1064): Syntax error near 'TO pk_tmp' at line 1.

Reproducing the bug

1. Run make test-resetdb
2. go run -tags sqlite . migrate sql "mysql://root:secret@(127.0.0.1:3444)/mysql?parseTime=true&multiStatements=true"
3. Execute ./persistence/sql/migrations/20211004110001000000_change_client_primary_key.mysql.down.sql

Expected behavior

The down migration reverts schema changes without producing an error.

Environment

• Version: v2.x, 09ac91b
• Environment: Xubuntu, adminer