Postgres Pro Standard : Documentation: 17: DESCRIBE : Postgres Professional

DESCRIBE
Prev	Up	34.14. Embedded SQL Commands	Home	Next

DESCRIBE

DESCRIBE — obtain information about a prepared statement or result set

Synopsis

DESCRIBE [ OUTPUT ] prepared_name USING [ SQL ] DESCRIPTOR descriptor_name
DESCRIBE [ OUTPUT ] prepared_name INTO [ SQL ] DESCRIPTOR descriptor_name
DESCRIBE [ OUTPUT ] prepared_name INTO sqlda_name

Description

DESCRIBE retrieves metadata information about the result columns contained in a prepared statement, without actually fetching a row.

Parameters

prepared_name #: The name of a prepared statement. This can be an SQL identifier or a host variable.
descriptor_name #: A descriptor name. It is case sensitive. It can be an SQL identifier or a host variable.
sqlda_name #: The name of an SQLDA variable.

Examples

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;

Compatibility

DESCRIBE is specified in the SQL standard.

See Also

ALLOCATE DESCRIPTOR, GET DESCRIPTOR

Prev	Up	Next
DECLARE STATEMENT	Home	DISCONNECT

epub pdf