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Alexander Korotkov 7a39f43d88 Extend xlogwait infrastructure with write and flush wait types 
Add support for waiting on WAL write and flush LSNs in addition to the
existing replay LSN wait type. This provides the foundation for
extending the WAIT FOR command with MODE parameter.

Key changes are following.
- Add WAIT_LSN_TYPE_STANDBY_WRITE and WAIT_LSN_TYPE_STANDBY_FLUSH to
  WaitLSNType.
- Add GetCurrentLSNForWaitType() to retrieve the current LSN for each wait
  type.
- Add new wait events WAIT_EVENT_WAIT_FOR_WAL_WRITE and
  WAIT_EVENT_WAIT_FOR_WAL_FLUSH for pg_stat_activity visibility.
- Update WaitForLSN() to use GetCurrentLSNForWaitType() internally.

Discussion: https://postgr.es/m/CABPTF7UiArgW-sXj9CNwRzUhYOQrevLzkYcgBydmX5oDes1sjg%40mail.gmail.com
Author: Xuneng Zhou <xunengzhou@gmail.com>
Reviewed-by: Alexander Korotkov <aekorotkov@gmail.com>
Reviewed-by: Chao Li <li.evan.chao@gmail.com>
Reviewed-by: Alvaro Herrera <alvherre@kurilemu.de>
2026-01-05 19:56:19 +02:00
..
access Extend xlogwait infrastructure with write and flush wait types 2026-01-05 19:56:19 +02:00
archive Update copyright for 2026 2026-01-01 13:24:10 -05:00
backup Update copyright for 2026 2026-01-01 13:24:10 -05:00
bootstrap Update copyright for 2026 2026-01-01 13:24:10 -05:00
catalog Add parse location to IndexElem. 2026-01-04 14:16:20 -05:00
commands Fix typos and inconsistencies in code and comments 2026-01-05 09:19:15 +09:00
common Fix typos and inconsistencies in code and comments 2026-01-05 09:19:15 +09:00
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.gitignore Use <stdint.h> and <inttypes.h> for c.h integers. 2024-12-04 15:05:38 +13:00
c.h Fix typos and inconsistencies in code and comments 2026-01-05 09:19:15 +09:00
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Makefile Split some long Makefile lists 2025-12-28 09:17:42 +09:00
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pg_config.h.in Remove unneeded defines from pg_config.h.in 2026-01-05 09:27:19 +09:00
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port.h Fix typos and inconsistencies in code and comments 2026-01-05 09:19:15 +09:00
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postgres_ext.h Move pg_int64 back to postgres_ext.h 2025-09-16 10:48:56 +02:00
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