GetTablesNeededExist reports the table name needed to execute ast.StmtNode the specified ast.StmtNode must be a DDLNode.

GetTablesNeededNonExist reports the table name that conflicts with ast.StmtNode the specified ast.StmtNode must be a DDLNode.

IsDDL reports weather the table DDLNode.

NewDDLSyncer create a new DDLSyncer.

NewExecutableChecker creates a new ExecutableChecker.

DDLSyncer can sync the table structure from upstream(usually MySQL) to ExecutableChecker.

ExecutableChecker is a part of TiDB to check the sql's executability.