Shmem queue is not flushed if receiver is not yet attached

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От Pavan Deolasee
Тема Shmem queue is not flushed if receiver is not yet attached
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Msg-id CABOikdPkwtLLCTnzzmpSMXo3QZa2yXq0J7Q61ssdLFAJYrOVvQ@mail.gmail.com
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Ответы Re: Shmem queue is not flushed if receiver is not yet attached  (Robert Haas <robertmhaas@gmail.com>)
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Hello,

While testing on the current PG master, I noticed a problem between backends communicating over a shared memory queue. I think `shm_mq_sendv()` fails to flush the queue, even if  `force_flush` is set to true, if the receiver is not yet attached to the queue. This simple fix solves the problem for me.

On another note, `shm_mq.h` declares `shm_mq_flush()`, but I don't see it being implemented. Maybe just a leftover from the previous work? Though it seems useful to implement that API.

Thanks,
Pavan

--
Pavan Deolasee
EnterpriseDB: https://www.enterprisedb..com
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