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Peter Geoghegan bee763aea1 nbtree: Always set skipScan flag on rescan. 
The TimescaleDB extension expects to be able to change an nbtree scan's
keys across rescans.  The issue arises in the extension's implementation
of loose index scan.  This is arguably a misuse of the index AM API,
though apparently it worked until recently.  It stopped working when the
skipScan flag was added to BTScanOpaqueData by commit 8a510275, though.
The flag wouldn't reliably track whether the scan (actually, the current
rescan) has any skip arrays, leading to confusion in _bt_set_startikey.

nbtree preprocessing will now defensively initialize the scan's skipScan
flag in all cases, including the case where _bt_preprocess_array_keys
returns early due to the (re)scan not using arrays.  While nbtree isn't
obligated to support this use case (at least not according to my reading
of the index AM API), it still seems like a good idea to be consistent
here, on general robustness grounds.

Author: Peter Geoghegan <pg@bowt.ie>
Reported-By: Natalya Aksman <natalya@timescale.com>
Discussion: https://postgr.es/m/CAJumhcirfMojbk20+W0YimbNDkwdECvJprQGQ-XqK--ph09nQw@mail.gmail.com
Backpatch-through: 18
2025-09-13 21:01:31 -04:00
..
backend nbtree: Always set skipScan flag on rescan. 2025-09-13 21:01:31 -04:00
bin Translation updates 2025-09-01 13:07:49 +02:00
common Don't put library-supplied -L/-I switches before user-supplied ones. 2025-07-29 15:17:40 -04:00
fe_utils Fix bug in archive streamer with LZ4 decompression 2025-07-02 13:48:41 +09:00
include Fix description of WAL record blocks in hash_xlog.h 2025-09-11 17:17:24 +09:00
interfaces libpq: Fix PQtrace() format for non-printable characters 2025-09-03 12:54:27 +09:00
makefiles pgxs.mk: remove unreachable rule for deleting regress.def. 2025-06-20 12:12:29 -04:00
pl Translation updates 2025-09-01 13:07:49 +02:00
port Fix indentation in pg_numa code 2025-07-01 15:24:19 +02:00
template thread-safety: gmtime_r(), localtime_r() 2024-08-23 07:43:04 +02:00
test Amend recent fix for SIMILAR TO regex conversion. 2025-09-13 16:55:51 -04:00
timezone Update time zone data files to tzdata release 2025b. 2025-04-30 11:13:49 -04:00
tools ci: openbsd: Increase RAM disk's size 2025-09-12 10:19:11 -04:00
tutorial Doc: simplify the tutorial's window-function examples. 2025-01-21 14:43:21 -05:00
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Makefile Remove distprep 2023-11-06 15:18:04 +01:00
Makefile.global.in Don't put library-supplied -L/-I switches before user-supplied ones. 2025-07-29 15:17:40 -04:00
Makefile.shlib Use exported symbols list on macOS for loadable modules as well 2025-06-10 07:04:43 +02:00
meson.build Update copyright for 2025 2025-01-01 11:21:55 -05:00
nls-global.mk Remove distprep 2023-11-06 15:18:04 +01:00