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PostgreSQL 9.4.1 Documentation
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DESCRIBE

Name

DESCRIBE -- obtain information about a prepared statement or result set

Synopsis

DESCRIBE [ OUTPUT ]prepared_name USING [ SQL ] DESCRIPTORdescriptor_nameDESCRIBE [ OUTPUT ]prepared_name INTO [ SQL ] DESCRIPTORdescriptor_nameDESCRIBE [ OUTPUT ]prepared_name INTOsqlda_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.