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pgsql: ltree: fix case-insensitive matching. 2+ messages / 1 participants [nested] [flat]
* pgsql: ltree: fix case-insensitive matching. @ 2025-12-16 21:00 Jeff Davis <jdavis@postgresql.org> 0 siblings, 0 replies; 2+ messages in thread From: Jeff Davis @ 2025-12-16 21:00 UTC (permalink / raw) To: pgsql-committers@lists.postgresql.org ltree: fix case-insensitive matching. Previously, ltree_prefix_eq_ci() used lowercasing with the default collation; while ltree_crc32_sz() used tolower() directly. These were equivalent only if the default collation provider was libc and the encoding was single-byte. Change both to use casefolding with the default collation. Backpatch through 18, where the casefolding APIs were introduced. The bug exists in earlier versions, but would require some adaptation. A REINDEX is required for ltree indexes where the database default collation is not libc. Reviewed-by: Chao Li <li.evan.chao@gmail.com> Reviewed-by: Peter Eisentraut <peter@eisentraut.org> Backpatch-through: 18 Discussion: https://postgr.es/m/450ceb6260cad30d7afdf155d991a9caafee7c0d.camel@j-davis.com Discussion: https://postgr.es/m/01fc00fd66f641b9693d4f9f1af0ccf44cbdfbdf.camel@j-davis.com Branch ------ master Details ------- https://git.postgresql.org/pg/commitdiff/7f007e4a044a713df5320fca09621d6ba8e632ba Modified Files -------------- contrib/ltree/crc32.c | 46 ++++++++++++++++++++++++++++++++++++++-------- contrib/ltree/lquery_op.c | 39 ++++++++++++++++++++++++++++++++++++--- 2 files changed, 74 insertions(+), 11 deletions(-) ^ permalink raw reply [nested|flat] 2+ messages in thread
* pgsql: ltree: fix case-insensitive matching. @ 2025-12-16 21:00 Jeff Davis <jdavis@postgresql.org> 0 siblings, 0 replies; 2+ messages in thread From: Jeff Davis @ 2025-12-16 21:00 UTC (permalink / raw) To: pgsql-committers@lists.postgresql.org ltree: fix case-insensitive matching. Previously, ltree_prefix_eq_ci() used lowercasing with the default collation; while ltree_crc32_sz() used tolower() directly. These were equivalent only if the default collation provider was libc and the encoding was single-byte. Change both to use casefolding with the default collation. Backpatch through 18, where the casefolding APIs were introduced. The bug exists in earlier versions, but would require some adaptation. A REINDEX is required for ltree indexes where the database default collation is not libc. Reviewed-by: Chao Li <li.evan.chao@gmail.com> Reviewed-by: Peter Eisentraut <peter@eisentraut.org> Backpatch-through: 18 Discussion: https://postgr.es/m/450ceb6260cad30d7afdf155d991a9caafee7c0d.camel@j-davis.com Discussion: https://postgr.es/m/01fc00fd66f641b9693d4f9f1af0ccf44cbdfbdf.camel@j-davis.com Branch ------ REL_18_STABLE Details ------- https://git.postgresql.org/pg/commitdiff/806555e3000d0b0e0c536c1dc65548128d457d86 Modified Files -------------- contrib/ltree/crc32.c | 47 +++++++++++++++++++++++++++++++++++-------- contrib/ltree/lquery_op.c | 39 ++++++++++++++++++++++++++++++++--- src/include/utils/pg_locale.h | 14 +++++++++++++ 3 files changed, 89 insertions(+), 11 deletions(-) ^ permalink raw reply [nested|flat] 2+ messages in thread
end of thread, other threads:[~2025-12-16 21:00 UTC | newest] Thread overview: 2+ messages (download: mbox mbox.gz follow: Atom feed) -- links below jump to the message on this page -- 2025-12-16 21:00 pgsql: ltree: fix case-insensitive matching. Jeff Davis <jdavis@postgresql.org> 2025-12-16 21:00 pgsql: ltree: fix case-insensitive matching. Jeff Davis <jdavis@postgresql.org>
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