Extension-pointer is a four-byte field that specifies the address of the first or only DBCAREA extension.
In this language... | The variable name for Extension-pointer is... |
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COBOL | DBCAREA-EXT-PTR |
PL/I | EXT_PTR |
C, C++ | extension_pointer |
IBM Assembler | DBCAXP |
This routine... | Takes the action for Extension-pointer... |
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DBCHINI | writes |
DBCHCL | reads (IRQ; IWPF) |
Extension-pointer is used by... | To... |
---|---|
applications | write |
Each extension applies only to particular functions, so care must be taken to address the proper extension before invoking a function and clearing the Extension-pointer when that function is complete.
For more information about DBCAREA extensions, see DBCAREA Extensions.