Information Schema Name.

ErrCannotAddForeign returns for foreign key exists.

ErrColumnExists returns for column already exists.

ErrColumnNotExists returns for column not exists.

ErrDatabaseDropExists returns for dropping a non-existent database.

ErrDatabaseExists returns for database already exists.

ErrDatabaseNotExists returns for database not exists.

ErrForeignKeyNotExists returns for foreign key not exists.

ErrForeignKeyNotMatch returns for foreign key not match.

ErrIndexExists returns for index already exists.

ErrMultiplePriKey returns for multiple primary keys.

ErrTableDropExists returns for dropping a non-existent table.

ErrTableExists returns for table already exists.

ErrTableNotExists returns for table not exists.

InfoSchema is the interface used to retrieve the schema information.