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InterviewSolution
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How Psb Should Be In Ims Dc Program? |
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Answer» In addition to database program control blocks (PCBs), the program specification BLOCK (PSB) contains one or more message PCBs. The message I/O PCB identifies the originating logical device. The I/O PCB must be referenced in the Get UNIQUE (GU) and Insert message (ISRT) calls. In addition, one or more ALTERNATE OUTPUT PCBs (TP PCBs) can be defined. Their logical DESTINATION can be defined in the PCBs or set dynamically by the application program using the Change destination (CHNG) calls. In addition to database program control blocks (PCBs), the program specification block (PSB) contains one or more message PCBs. The message I/O PCB identifies the originating logical device. The I/O PCB must be referenced in the Get Unique (GU) and Insert message (ISRT) calls. In addition, one or more alternate output PCBs (TP PCBs) can be defined. Their logical destination can be defined in the PCBs or set dynamically by the application program using the Change destination (CHNG) calls. |
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