D.11.13 SET DESCRIPTOR

Name

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 33.7.1 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 END-EXEC.
EXEC SQL SET DESCRIPTOR indesc VALUE 1 DATA = 2 END-EXEC.
EXEC SQL SET DESCRIPTOR indesc VALUE 1 DATA = :val1 END-EXEC.
EXEC SQL SET DESCRIPTOR indesc VALUE 2 DATA = 'some string', INDICATOR = :val1 END-EXEC.
EXEC SQL SET DESCRIPTOR indesc VALUE 2 INDICATOR = :val2null, DATA = :val2 END-EXEC.

Compatibility

SET DESCRIPTOR is specified in the SQL standard.