SET DESCRIPTOR — set information in an SQL descriptor area
SET DESCRIPTORdescriptor_namedescriptor_header_item=value[, ... ] SET DESCRIPTORdescriptor_nameVALUEnumberdescriptor_item=value[, ...]
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.
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.
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;
SET DESCRIPTOR is specified in the SQL standard.
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