SET DESCRIPTOR
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;
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.
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