This exit is called every time CA Dataquery is ready to include a row in the found set of a query. It can reject the row, preventing its inclusion in the set. See DQOPTLST Parameters for information about the DATAXIT= parameter of the System Option Table.
Prerequisites
The exit should be in Assembler language and cannot use monitor or operating system services.
Linkage
Standard linkage conventions apply. On input to the exit, register 1 points to a parameter list as follows:
Address of the data record
Address of 3-byte CA Datacom/DB table name
Address of 2-byte CA Datacom/DB database ID (binary)
Address of 4-byte return code word
Address of 32-byte user name
Address of 100-byte work area for use by the exit
Return Code
On return, all registers except R15 should be restored to their values on entry to the exit. A return code should be placed in R15. The exit should set the return code word to binary zero if the data record can be included in the found set, and any nonzero value if the record should not be included.
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