Control blocks for execution of field procedures

Certain control blocks are used to communicate to a field procedure.

Parameter list (FPPL) for field procedures
The field procedure parameter list is pointed to by register 1 on entry to a field procedure. It contains the addresses of five other areas.
Work area for field procedures
The work area is a contiguous, uninitialized area of locally addressable, pageable, swappable, and fetch-protected storage that is obtained in storage key 7 and subpool 229.
Information block (FPIB) for field procedures
The field procedure information block communicates general information to a field procedure.
Parameter value list (FPPVL) for field procedures
The field procedure parameter value list communicates the literal list to the field procedure during the field-definition process. The literal list is supplied in the CREATE TABLE or ALTER TABLE statement.
Value descriptor for field procedures
A value descriptor describes the data type and other attributes of a value.

Parent topic: Field procedures