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what does FLUSH do?


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Pedro

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PostPosted: Fri Sep 01, 2017 8:32 pm
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From the manual: "The FLUSH statement flushes the buffers associated with an open output file... [blah blah]"

It is not clear what 'flushes' means. It seems destructive.

Or does it mean that the buffers actually make it to the print file?
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steve-myers

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PostPosted: Fri Sep 01, 2017 9:26 pm
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Pedro wrote:
From the manual: "The FLUSH statement flushes the buffers associated with an open output file... [blah blah]" ...
Which manual? I searched the entire DFSMS manual set and found no "FLUSH" macro.
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Pedro

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PostPosted: Sat Sep 02, 2017 2:47 am
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Sorry for not being clear.

I posted this question in the PLI & Assembler forum... it is a PLI question. I was referring to the Language Reference, SC14-7285.
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prino

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PostPosted: Sat Sep 02, 2017 4:00 am
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FLUSH statement
The FLUSH statement can be used to flush one or all files.

Code:
FLUSH -+- FILE(file-reference) -+- ;
       +- FILE(*) --------------+

FILE
Specifies the name of the output file.
The FLUSH statement flushes the buffers associated with an open output file (or with all open output files if * is specified). This normally happens when the file is closed or the program ends, but the FLUSH statement ensures the buffers are flushed before any other processing occurs.

You can do this for SYSPRINT (after a PUT DATA) to make the output immediately visible in, for example, SDSF.
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Willy Jensen

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PostPosted: Mon Sep 04, 2017 1:35 pm
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FLUSH normally means writing the buffers to ther destination. This is not just a PL/I thing.
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Bernie Rataj

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Joined: 02 Jun 2018
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PostPosted: Thu Jun 14, 2018 11:20 pm
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The FLUSH statement doesn't currently work for record files. See APAR PI95695.
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