Hi, In the implemetation of Pdo-driver (extension) , what's the Sequence/Index scheme for parameter: 'colno' ? This param 'colno' is input in driver calls (of PDO statement) : int SKEL_stmt_describe_col(pdo_stmt_t *stmt, int colno TSRMLS_DC) int SKEL_stmt_get_col_data(pdo_stmt_t *stmt, int colno, ...) e.g If the script has cmds: Insert into Table test1(col1 int, col2 string, col3 real) SELECT col2,col3 from test1; The driver would which values for colno ? -sanjeev