[harunollyo]

More methods are added to the Query Builder, with unit test coverage and usage documentation.

Schema Validation

public static function has_table( string $table ): bool;
public static function has_column( string $table, string $column ): bool;
public static function has_columns( string $table, array $columns ): bool;

Row Locking

DB::table( 'tutor_orders' )
	->where( 'id', 101 )
	->lock_for_update()
	->first();

Manual Transaction Handling

public static function begin_transaction(): bool;
public static function commit(): bool;
public static function rollback(): bool;

Automatic Transaction Handling

Commits on success and rolls back if an exception is thrown.

public static function transaction( callable $callback );