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| author | Thomas Munro <tmunro@postgresql.org> | 2021-07-13 11:13:48 +1200 |
|---|---|---|
| committer | Thomas Munro <tmunro@postgresql.org> | 2021-07-13 11:43:21 +1200 |
| commit | 7c09d2797ecdf779e5dc3289497be85675f3d134 (patch) | |
| tree | 4b223d030bc675e57ae1afde13b0a9217a17e136 /contrib/test_decoding/test_decoding.c | |
| parent | f014b1b9bb8eda4e82c1805969dbae2b07b7d54d (diff) | |
| download | postgresql-7c09d2797ecdf779e5dc3289497be85675f3d134.tar.gz postgresql-7c09d2797ecdf779e5dc3289497be85675f3d134.zip | |
Add PSQL_WATCH_PAGER for psql's \watch command.
Allow a pager to be used by the \watch command. This works but isn't
very useful with traditional pagers like "less", so use a different
environment variable. The popular open source tool "pspg" (also by
Pavel) knows how to display the output if you set PSQL_WATCH_PAGER="pspg
--stream".
To make \watch react quickly when the user quits the pager or presses
^C, and also to increase the accuracy of its timing and decrease the
rate of useless context switches, change the main loop of the \watch
command to use sigwait() rather than a sleeping/polling loop, on Unix.
Supported on Unix only for now (like pspg).
Author: Pavel Stehule <pavel.stehule@gmail.com>
Author: Thomas Munro <thomas.munro@gmail.com>
Discussion: https://postgr.es/m/CAFj8pRBfzUUPz-3gN5oAzto9SDuRSq-TQPfXU_P6h0L7hO%2BEhg%40mail.gmail.com
Diffstat (limited to 'contrib/test_decoding/test_decoding.c')
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