SET DESCRIPTOR

SET DESCRIPTOR — set information in an SQL descriptor area

Synopsis

SET DESCRIPTOR descriptor_name descriptor_header_item = value [, ... ]
SET DESCRIPTOR descriptor_name VALUE number descriptor_item = value [, ...]

Description

SET DESCRIPTOR populates an SQL descriptor area with values. The descriptor area is then typically used to bind parameters in a prepared query execution.

This command has two forms: The first form applies to the descriptor header, which is independent of a particular datum. The second form assigns values to particular datums, identified by number.

Parameters

descriptor_name #

A descriptor name.

descriptor_header_item #

A token identifying which header information item to set. Only COUNT, to set the number of descriptor items, is currently supported.

number #

The number of the descriptor item to set. The count starts at 1.

descriptor_item #

A token identifying which item of information to set in the descriptor. See Section 34.7.1 for a list of supported items.

value #

A value to store into the descriptor item. This can be an SQL constant or a host variable.

Examples

EXEC SQL SET DESCRIPTOR indesc COUNT = 1;
EXEC SQL SET DESCRIPTOR indesc VALUE 1 DATA = 2;
EXEC SQL SET DESCRIPTOR indesc VALUE 1 DATA = :val1;
EXEC SQL SET DESCRIPTOR indesc VALUE 2 INDICATOR = :val1, DATA = 'some string';
EXEC SQL SET DESCRIPTOR indesc VALUE 2 INDICATOR = :val2null, DATA = :val2;

Compatibility

SET DESCRIPTOR is specified in the SQL standard.