DESCRIBE — 得到有关一个预备语句或结果集的信息
DESCRIBE [ OUTPUT ]prepared_name
USING [ SQL ] DESCRIPTORdescriptor_name
DESCRIBE [ OUTPUT ]prepared_name
INTO [ SQL ] DESCRIPTORdescriptor_name
DESCRIBE [ OUTPUT ]prepared_name
INTOsqlda_name
DESCRIBE
检索被一个预备语句所含的结果列的元信息,而不会实际取得一行。
EXEC SQL ALLOCATE DESCRIPTOR mydesc; EXEC SQL PREPARE stmt1 FROM :sql_stmt; EXEC SQL DESCRIBE stmt1 INTO SQL DESCRIPTOR mydesc; EXEC SQL GET DESCRIPTOR mydesc VALUE 1 :charvar = NAME; EXEC SQL DEALLOCATE DESCRIPTOR mydesc;
SQL 标准中说明了DESCRIBE
。