DEQ call

Format (full function)

Format (Fast Path DEDB)

Parameters

DEDB pcb (Fast Path only)

Specifies any DEDB PCB for the call.

i/o pcb (full function only)

Specifies the I/O PCB for the DEQ call. This is an input and output parameter.

aib

Specifies the AIB for the call. This is an input and output parameter. These fields must be initialized in the AIB:

AIBID

Eye catcher. This 8-byte field must contain DFSAIBbb.

AIBLEN

AIB lengths. This field must contain the actual length of the AIB that the application program obtained.

AIBRSNM1

Resource name. This 8-byte, left-justified field must contain the PCB name IOPCBbbb.

AIBOALEN

I/O area length. This field must contain the length of the I/O area specified in the call list.

i/o area (full function only)

Specifies the 1-byte area containing a letter (A-J), which represents the lock class of the locks to be released. This is a mandatory input parameter.

Usage

The DEQ call releases all segments that are retrieved using the Q command code, except:

• Segments modified by your program, until your program reaches a commit point
• Segments required to keep your position in the hierarchy, until your program moves to another database record
• A class of segments that has been locked using a different lock class

If your program only reads segments, it can release them by issuing a DEQ call. If your program does not issue a DEQ call, IMS releases the reserved segments when your program reaches a commit point. By releasing the segments with a DEQ call before your program reaches a commit point, you make them available to other programs more quickly.

For more information on the relationship between the DEQ call and the Q command code, see the topic "Reserving Segments for the Exclusive Use of Your Program" in IMS Version 15 Application Programming.

Restrictions

In a CICS® DL/I environment, calls made from one CICS (DBCTL) system are supported in a remote CICS DL/I environment, if the remote environment is also CICS (DBCTL).