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Postgres REL_18_4

Postgres: REL_18_4 Release

Release date:

May 11, 2026

Previous version:

REL_18_3 (released February 23, 2026)

Magnitude:

4,015 Diff Delta

Contributors:

20 total committers

Data confidence:

Commits:

113

113 Commits in this Release

Ordered by the degree to which they evolved the repo in this version.

Fix more multibyte issues in ltree

Authored February 26, 2026

Consider collation when proving subquery uniqueness

Authored May 5, 2026

Make palloc_array() and friends safe against integer overflow

Authored May 11, 2026

Fix HAVING-to-WHERE pushdown with nondeterministic collations

Authored May 1, 2026

Harden astreamer tar parsing logic against archives it can't handle

Authored April 2, 2026

Add pg_add_size_overflow() and friends

Authored May 11, 2026

Fix slotsync worker blocking promotion when stuck in wait

Authored April 8, 2026

Consider opfamily and collation when removing redundant GROUP BY columns

Authored May 8, 2026

Add missing connection validation in ECPG

Authored May 1, 2026

Fix incorrect NEW references to generated columns in rule rewriting

Authored April 21, 2026

Guard against overly-long numeric formatting symbols from locale

Authored April 22, 2026

test_custom_types: Test module with fancy custom data types

Authored March 2, 2026

Fix multixact backwards-compatibility with CHECKPOINT race condition

Authored March 23, 2026

Prevent buffer overrun in spell.c's CheckAffix()

Authored April 22, 2026

Allow PG_PRINTF_ATTRIBUTE to be different in C and C++ code

Authored February 25, 2026

Fix size underestimation of DSA pagemap for odd-sized segments

Authored March 9, 2026

Fix integer overflow in nodeWindowAgg.c

Authored April 9, 2026

Fix premature NULL lag reporting in pg_stat_replication

Authored March 26, 2026

In pg_dumpall, don't skip role GRANTs with dangling grantor OIDs

Authored March 2, 2026

Add tests for low-level PGLZ [de]compression routines

Authored April 14, 2026

Fix null-bitmap combining in array_agg_array_combine()

Authored April 6, 2026

Fix HAVING-to-WHERE pushdown for simple-CASE form

Authored May 8, 2026

Fix assorted places that need to use palloc_array()

Authored May 11, 2026

Prevent some buffer overruns in spell.c's parsing of affix files

Authored April 22, 2026

Consider collation when proving uniqueness from unique indexes

Authored May 5, 2026

Fix unsafe RTE_GROUP removal in simplify_EXISTS_query

Authored February 25, 2026

Fix incremental JSON parser numeric token reassembly across chunks

Authored April 9, 2026

Fix unbounded recursive handling of SSL/GSS in ProcessStartupPacket()

Authored May 11, 2026

basic_archive: Allow archive directory to be missing at startup

Authored March 2, 2026

Fix some cases of indirectly casting away const

Authored February 25, 2026

Fix multiple bugs in astreamer pipeline code

Authored March 23, 2026

Prevent buffer overrun in unicode_normalize()

Authored May 11, 2026

jit: Stop emitting lifetime.end for LLVM 22

Authored April 2, 2026

pg_upgrade: Use max_protocol_version=3.0 for older servers

Authored February 24, 2026

Prevent restore of incremental backup from bloating VM fork

Authored March 9, 2026

jit: No backport::SectionMemoryManager for LLVM 22

Authored April 3, 2026

Check for unterminated strings when calling uloc_getLanguage()

Authored April 14, 2026

Fix WITHOUT OVERLAPS' interaction with domains

Authored April 7, 2026

Fix yet another bug in archive streamer with LZ4 decompression

Authored March 4, 2026

Use GetXLogInsertEndRecPtr in gistGetFakeLSN

Authored March 13, 2026

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REL_18_3 Released February 23, 2026

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REL_18_1 Released November 10, 2025

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Top Contributors in REL_18_4

tglsfdc

richard-guo-5f72

jeff-davis

michaelpq

adunstan

MasaoFujii

hlinnaka

robertmhaas

macdice

nathan-bossart

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