Accessing records from a specific member using the SQL Task

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Accessing records from a specific member using the SQL Task

Postby Support_Ron » Wed Mar 04, 2009 5:10 pm

It is quite common for physical files on the iSeries to have multiple members. Often times you may want to process records from a specific member than the default (*FIRST) member. This can be accomplished by:

  • Calling a system procedure to override the default (*FIRST) member (just for this job)
  • Running the Select SQL statement in the usual way
  • Finally by calling another system procedure to reset the default member to what it was
Below is an example:

/* Override to the member (the second parameter must be the exact length of the string) */

CALL QSYS.QCMDEXC('OVRDBF FILE(file) TOFILE(library/file) MBR(member) OVRSCOPE(*JOB)', 0000000065.00000)

The number 0000000065.00000 is the length of the command in BOLD

/* Select records from the member */

SELECT * FROM file;

/* Delete the override to the member */

CALL QSYS.QCMDEXC('DLTOVR FILE(file) LVL(*JOB)', 0000000027.00000);

The number 0000000027.00000 is the length of the command in BOLD.

In essence, You will have 3 Query Elements in your SQL Task, with the first query to override the default member name, the second to run the actual query and the third to delete the override.
Support_Ron
Support Specialist
 
Posts: 11
Joined: Tue Mar 03, 2009 5:45 pm

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