## Incremental Update: Report Oldest Xmin Source When Autovacuum Cannot Remove Tuples ### Summary Limited new technical substance since the last analysis. The thread saw one bug identification by th...
# pg_rewind Does Not Rewind Diverging Timelines — May 2026 Summary ## Problem Statement Mats Kindahl discovered (via TLA+/TLC model checking) that PostgreSQL's timeline identifier (TLI) system can s...
## Incremental Update: Concrete Benchmarks, WIP Patches, and Protocol Design Discussion ### Key Developments 1. **Nathan posted concrete benchmark results at 1M scale** comparing Jelte's `CreateOne...
## Incremental Analysis: Andrey Borodin's Architectural Review Andrey Borodin provides the first substantive review of the GiST-side architecture, raising three distinct technical concerns and broade...
# Technical Analysis: Fix libxml Leaks in contrib/xml2 XPath Functions ## Core Problem The `contrib/xml2` module contains two memory leak bugs on **successful execution paths** in its XPath evaluat...
# Technical Analysis: Renaming `pg_attribute_always_inline` to a Shorter Form ## Core Problem The macro `pg_attribute_always_inline` — used to force the compiler to inline a function regardless of ...
No substantive technical progress.
# Technical Analysis: pg_stat_lock Blocker Mode Dimension ## Core Problem PostgreSQL's `pg_stat_lock` view (introduced in recent versions to provide cumulative lock wait statistics) currently aggre...
# Monthly Summary: RFC: Allow EXPLAIN to Output Page Fault / Storage I/O Information — May 2026 ## Overview This month saw the discussion mature from technical refinement into a serious viability de...
# Monthly Summary: Online Data Checksums — May 2026 ## Overview May 2026 saw continued post-commit stabilization of the online data checksums feature. The major commit had already landed, and this m...
# Technical Analysis: tablecmds.c `recurse` vs `recursing` Parameter Naming Clarity ## Core Problem PostgreSQL's `tablecmds.c` is one of the largest and most complex files in the codebase, implemen...
# Dynamic Logical Decoding Activation Without Server Restart ## Core Problem PostgreSQL's `wal_level` parameter controls how much information is written to WAL records. Setting it to `logical` enab...
# Monthly Summary: Join Statistics for the PostgreSQL Planner (May 2026) ## Overview May 2026 saw the "join statistics" patch transition from conceptual design convergence to active committer-level ...
# pg_rewind: Skip Vanished Source Files During Traversal ## Core Problem This thread identifies a potential bug in `pg_rewind`'s source directory traversal logic within `recurse_dir()`. The issue c...
# Incremental View Maintenance (IVM) for PostgreSQL — Deep Technical Analysis ## The Core Problem Materialized views in PostgreSQL are static snapshots: they must be fully recomputed via `REFRESH MA...
# Technical Analysis: UTF-8 Substring Validation Bug Report ## Core Problem The reporter encountered a situation where `substring(text, int, int)` (the SQL standard positional substring function) ra...
# Fix Race During Concurrent Logical Decoding Activation ## Background: Dynamic Logical Decoding Toggle This thread addresses a race condition in a newer PostgreSQL feature that allows logical deco...
# Technical Analysis: Reject HEADER with binary and json COPY formats by option presence ## Core Problem The thread identifies an inconsistency between PostgreSQL's documentation and implementation...
# PostgreSQL and OpenSSL 4.0.0 — May 2026 Summary ## Overview OpenSSL 4.0.0 (GA April 2026) introduced return-value constification on APIs used by PostgreSQL's TLS layer (`libpq`, `contrib/sslinfo`)...
# Monthly Summary: Fix ProcKill lock-group vs procLatch recycle race (May 2026) ## Overview This thread addresses a genuine concurrency bug in `ProcKill()` that has existed since PostgreSQL 9.6 (whe...
## Incremental Update: Reproducer Patch Fix and Confirmation This round contains only two messages dealing with reproducing the issue — no new technical insights into the root cause or proposed fixes...
## Incremental Update: v2 Patch Unifies the Full Bug Class ### Key Development Richard (guofenglinux@gmail.com) has posted a **v2 patch** that significantly expands the scope of the fix from the ori...
## Incremental Update: Fix Bug of CHECK Constraint Enforceability Recursion ### Summary of New Developments The thread has progressed from Jian He's simple v1 patch (reject all enforceability chang...
# Fix safe_wal_size for Slots Without restart_lsn ## Core Problem The `pg_replication_slots` system view exposes a `safe_wal_size` column that indicates how much WAL can be written before a replica...
## Incremental Update: v13 Patchset — Switch Back to TEXT Format with Refactored Escaping ### Key Change: CSV → TEXT format reversal, with code deduplication Matheus posted a new patchset (v13) that...
## Update: Patch Committed Andrew Dunstan pushed the patch on 2026-05-30. No further technical discussion accompanied the commit — just a brief confirmation message ("pushed."). This closes the open ...
# Autovacuum Launcher Crash: Assert in pgstat_count_io_op (IOOP_EXTEND on pg_database's VM) ## Technical Problem This thread reports a crash in the autovacuum launcher triggered by an assertion fail...
# Analysis: First Draft of PG 19 Release Notes — Role/Function Miscategorization Fix ## Core Problem The PostgreSQL 19 release notes contained an inaccuracy in describing a security/privilege enhan...
# Unify Parallel Worker Handling for Index Builds and Instrumentation ## Core Problem PostgreSQL's parallel index build infrastructure has accumulated significant code duplication across different ...
# Monthly Summary: Replace `txid_current()` with `pg_current_xact_id()` — May 2026 ## Overview This thread addresses replacing deprecated `txid_current()` calls in PostgreSQL's own test suite with t...
# Make Memory Checking / Sanitizing Infrastructure Better ## Core Problem PostgreSQL's internal memory management system (aset.c, slab.c, generation.c) includes debug-mode instrumentation to detect...
# Monthly Summary: Support EXCEPT for ALL SEQUENCES / TABLES IN SCHEMA Publications — May 2026 ## Overview This thread tracks two parallel extensions to PostgreSQL's logical replication publication ...
# Technical Analysis: REFRESH MATERIALIZED VIEW CONCURRENTLY + WITH NO DATA Error Checking Location ## Core Problem The thread raises a question about PostgreSQL's internal architecture regarding **...
No substantive technical progress.
## Incremental Update: Tristan Partin's Response to Paquier's Review Tristan Partin responds to Michael Paquier's review, agreeing with some suggestions while pushing back on others. ### Key Decisio...
# CI: Skip minfree file in cores_backtrace.sh ## The Core Problem PostgreSQL's CI infrastructure uses a script (`src/tools/ci/cores_backtrace.sh`) that iterates over files in a core dump directory ...
# Technical Analysis: Make Stack Depth Check Work with ASAN's use-after-return ## Core Problem PostgreSQL implements a stack depth check (`check_stack_depth()`) to prevent unbounded recursion from c...
## Incremental Update: Commit and Follow-up Discussion ### Resolution: Patch Committed (Simplified) Robert Haas committed a simplified version of the fix. The key decisions in the simplification: 1...
# Glob Support in `extension_control_path` / `dynamic_library_path` ## Core Problem PostgreSQL 18 introduced the `extension_control_path` GUC (along with changes to `dynamic_library_path`) to allow ...
## Incremental Update: Patch v2 Addressing Non-Unique Index Handling ### Summary of New Activity Two new messages advance the discussion with a concrete patch revision. Masahiko Sawada (a committer ...
# pg_createsubscriber: Fix incorrect handling of cleanup flags — May 2026 Summary ## Overview A bug in `pg_createsubscriber`'s cleanup flag handling was identified, reviewed, and committed (with bac...
# REPACK [CONCURRENTLY] — May 2026 Monthly Summary ## Overview May 2026 was dominated by the **decision to revert db-specific snapshots** from PG19, while the core REPACK CONCURRENTLY feature remain...
# Monthly Summary: Avoid Leaking System Path from pg_available_extensions (May 2026) ## Overview This thread addresses an information disclosure bug in the `pg_available_extensions` view's `location...
# pg_recvlogical: Send Final Feedback on SIGINT/SIGTERM Exit ## Core Problem `pg_recvlogical` is PostgreSQL's command-line tool for consuming logical replication streams. It connects to a logical r...
## Commit Confirmation Tom Lane has committed the patch by folding it into commit `0f24332ae`. No further technical discussion occurred — this was a brief acknowledgment that the cleanup was incorpor...
## New Buildfarm Failure: Test Race Condition in 038_walsnd_shutdown_timeout Alexander Korotkov reports a new buildfarm failure on `tamandua` (FreeBSD) in the test `038_walsnd_shutdown_timeout.pl`, d...
# Copy-Paste Error in `hash_record_extended()` — `args[1].isnull` Not Set ## Core Problem A straightforward but potentially consequential copy-paste bug exists in `src/backend/utils/adt/rowtypes.c`...
# Monthly Summary: `ON_ERROR TABLE` — Saving COPY FROM Errors to a Table (May 2026) ## Overview May 2026 saw the most active development period for this long-running patch (originally proposed Feb 2...
# Monthly Summary: EXPLAIN ANALYZE Wait Event Reporting (May 2026) ## Overview This RFC proposes adding a new `EXPLAIN (ANALYZE, WAITS)` option that transforms PostgreSQL's wait event subsystem from...
# Fix Race in ReplicationSlotRelease for Ephemeral Slots ## Core Problem The bug exists in `ReplicationSlotRelease()`, a function responsible for releasing a backend's hold on a replication slot. T...
# Technical Analysis: Remove Obsolete tupDesc Assignment in Extended Statistics ## Core Problem This patch addresses a code hygiene issue in PostgreSQL's extended statistics subsystem, specifically...
# Monthly Summary: Rebuild CHECK Constraints After Generated Column SET EXPRESSION (May 2026) ## Overview This thread addressed a data integrity bug where `ALTER TABLE ... ALTER COLUMN ... SET EXPRE...
# Monthly Summary: Moving recovery target conflict detection out of GUC assign hooks (May 2026) ## Problem Statement PostgreSQL's five `recovery_target_*` GUCs (`recovery_target`, `recovery_target_l...
# Monthly Summary: FOR PORTION OF and GENERATED STORED Columns (May 2026) ## Overview This thread underwent a dramatic arc in May 2026: a 12-version patch series addressing stale GENERATED STORED co...
# Protocol Greasing During PostgreSQL 19 Beta — May 2026 Summary ## Overview Jacob Champion announced plans to exercise PostgreSQL's wire-protocol negotiation machinery during the 19 beta cycle usin...
# Technical Analysis: Fix typos in pqsignal.c comment ## Overview This is a minimal, comment-only patch that corrects two typographical errors in `src/port/pqsignal.c`. The patch has no functional ...
# PGConf.dev 2026 CSN Unconference Session: Technical Analysis ## The Core Problem: Commit Sequence Numbers and the Visibility/Durability Tension This thread captures the state-of-the-art thinking ...
# Technical Analysis: Statistics Import/Export for Performance Testing ## Core Problem The thread addresses a fundamental question about the PostgreSQL statistics import/export feature (introduced ...
# CREATE TABLE LIKE: INCLUDING PARAMETERS and INCLUDING TRIGGERS — May 2026 Summary ## Overview This thread advances two patches extending `CREATE TABLE ... (LIKE source INCLUDING ...)` to cover two...
# Technical Analysis: Cyclic RLS Policy / Infinite Recursion Bug in PostgreSQL ## The Core Problem Row-Level Security (RLS) policies in PostgreSQL are implemented through the query rewriter. When a...
# Monthly Summary: Release Replication Slot on Error in SQL-Callable Slot Functions (May 2026) ## Problem Statement PostgreSQL's SQL-callable replication slot functions (`pg_replication_slot_advance...
# Key Joins: A New SQL Language Feature for PostgreSQL ## Core Problem The fundamental problem addressed by this proposal is that SQL's JOIN syntax is semantically overloaded — a JOIN can serve thr...
# Analysis: DBeaver Connection Timeouts to PostgreSQL 18 on Linux ## Summary This thread is a **support request** mistakenly posted to pgsql-hackers (the development mailing list), not a development...
# Technical Analysis: postgres_fdw, dblink — Validate use_scram_passthrough Values ## Core Problem The `use_scram_passthrough` option, introduced as part of SCRAM authentication passthrough support...
# Bound Memory Usage During Manual Slot Sync Retries — May 2026 Summary ## Problem & Resolution The `pg_sync_replication_slots()` SQL function had an unbounded memory growth problem during its inter...
# Monthly Summary: Add WHERE Clause Support to REFRESH MATERIALIZED VIEW — May 2026 ## Overview This month saw significant technical maturation of the patch to add `REFRESH MATERIALIZED VIEW mv WHER...
# Monthly Summary: [PATCH] Fix LISTEN Startup Race with Direct Advancement — May 2026 ## Overview This thread identifies and fixes a correctness bug in PostgreSQL's asynchronous notification system ...
# Monthly Summary: effective_wal_level Not Decreasing After REPACK (CONCURRENTLY) — May 2026 ## Problem Statement A bug was identified in the interaction between PostgreSQL's dynamic WAL level toggl...
# Monthly Summary: Avoid calling SetMatViewPopulatedState if possible (May 2026) ## Overview A focused optimization patch to eliminate unnecessary `pg_class` catalog updates during `REFRESH MATERIAL...
# Monthly Summary: Improve pg_stat_statements Scalability — May 2026 ## Overview May 2026 saw the pg_stat_statements scalability patch evolve from initial proposal through architectural refinement, ...
# Technical Analysis: uuidv7() Interval Shift Boundary Validation ## Core Problem The `uuidv7(interval)` function in PostgreSQL accepts arbitrary interval offsets to shift the timestamp embedded in ...
# Technical Analysis: Segmentation Fault from Reentrancy in RI_FKey_cascade_del ## Core Problem This thread identifies a **use-after-free vulnerability** in PostgreSQL's referential integrity (RI) ...
# Monthly Summary: Cirrus CI Shutdown and PostgreSQL CI Infrastructure Migration (May 2026) ## Overview With Cirrus CI's June 1, 2026 shutdown deadline looming, the PostgreSQL community moved from d...
# Monthly Summary: Schema-Qualified Names in Publication Error Messages (May 2026) ## Overview This thread reached completion in May 2026, progressing from API design refinement through final commit...
# Monthly Summary: Prevent Repeated Deadlock-Check Signals in Standby Buffer Pin Waits (May 2026) ## Overview This thread addresses unnecessary repeated signaling in PostgreSQL's hot standby recover...
# Technical Analysis: `log_postmaster_stats` — Periodic Postmaster Activity Reporting ## Core Problem The PostgreSQL postmaster process — the central coordinator responsible for forking new backend ...
# Monthly Summary: Avoid Orphaned Object Dependencies, Take 3 — May 2026 ## Overview This month saw significant progress toward landing the patch that prevents orphaned object dependencies in Postgr...
# Analysis: Code Contributions Metrics for PostgreSQL — Methodology, Automation, and Identity Resolution ## Core Problem This thread spans two years (2024-2025) of Robert Haas's annual effort to qu...
# Parallel INSERT SELECT take 2 — May 2026 Monthly Summary ## Overview After five years of dormancy, this thread was revived by Tomas Vondra with a fundamental reassessment of the approach taken by ...
# CREATE INDEX CONCURRENTLY on Partitioned Tables: Deep Technical Analysis ## The Core Problem PostgreSQL's `CREATE INDEX CONCURRENTLY` (CIC) has never supported partitioned tables. When a user issu...
# Dump Statistic Issue with Index on Expressions — May 2026 Summary ## Overview A reported bug in `pg_dump --statistics-only` (new in PostgreSQL 18) involving cross-index attribute name leakage was ...
# Deep Technical Analysis: Generic Plans and "Initial" Pruning ## The Core Problem When PostgreSQL executes prepared statements against partitioned tables using **generic plans**, performance degra...
# Monthly Summary: `pg_get_trigger_ddl()` and `pg_get_policy_ddl()` — May 2026 ## Overview This thread encompasses two intertwined sub-patches under Andrew Dunstan's **Retail DDL Functions** project...
# Monthly Summary: Add NESTED_STATEMENTS Option to EXPLAIN (May 2026) ## Overview This thread saw rapid iteration from v1 through v4 of a patch adding `NESTED_STATEMENTS` as a new EXPLAIN option, tr...
# Monthly Summary: contrib/anyarray — Generalizing intarray to Any Array Type (May 2026) ## Overview A new contrib module `anyarray` was proposed to generalize `contrib/intarray`'s set-style operati...
# Monthly Summary: Fix Overflow and Underflow in regr_r2() (and regr_intercept()) ## Overview This thread addresses numerical instability in PostgreSQL's `regr_r2()` and `regr_intercept()` aggregate...
# Deep Technical Analysis: Optimizing Nested Loop Left Joins by Short-Circuiting Inner Scans ## The Core Problem When PostgreSQL executes a Nested Loop Left Join where the join condition (ON clause...
# Alert Clients When Prepared Statements Are Deallocated ## Core Problem When a PostgreSQL client creates prepared statements (at the protocol level), those statements can be invalidated by SQL comm...
# Adding a Stored Generated Column Without Long-Lived Locks — May 2026 Summary ## Overview This thread proposes a two-patch approach to allow adding stored generated columns to existing PostgreSQL t...
# Add XMLNamespaces to XMLElement - Technical Analysis ## Core Problem PostgreSQL's `xmlelement()` function, which constructs XML elements per the SQL/XML standard, lacks support for the `XMLNAMESP...
# Non-superuser Subscription Owners: Deep Technical Analysis ## Core Problem PostgreSQL's logical replication system was designed with the assumption that subscriptions would always be owned and ope...
# Add Wait Events for Server Logging Destination Writes ## Core Problem PostgreSQL's observability infrastructure has a blind spot in the logging subsystem. When a backend calls `write(2)` to emit ...
# Fix Regression in vacuumdb --analyze-in-stages for Partitioned Tables ## Core Problem A refactoring commit (`c4067383cb2`) introduced a subtle regression in `vacuumdb`'s handling of partitioned t...
# PostgreSQL 19 Beta 1 Release Announcement Draft Review ## Overview This thread concerns the community review of the PostgreSQL 19 Beta 1 release announcement draft, a standard part of the PostgreS...
# Set Notice Receiver Before libpq Connection Startup — May 2026 Summary ## Problem PostgreSQL's `libpqsrv` infrastructure (used by dblink, postgres_fdw, and other extensions for outbound libpq conn...
# Performance Degradation in libpq/pgbench Due to OpenSSL 3.x Global Lock Contention ## Core Problem When using `pgbench --connect` (which tests new connection establishment rate) against pgbouncer...
# Technical Analysis: RISC-V Zbb Popcount Optimization and Clang Auto-Vectorization Bug ## Core Problem This thread encompasses two distinct but related problems for PostgreSQL on RISC-V: 1. **Perf...
# Technical Analysis: Message Wording/Formatting Cleanup Patches ## Core Problem This thread addresses a collection of internationalization (i18n), style consistency, and naming issues discovered du...
# Monthly Summary: Fix Mismatched Deallocation Functions (May 2026) ## Overview Tristan Partin proposed a mechanical refactor to fix allocator/deallocator mismatches in PostgreSQL's frontend code, u...
# Eager Aggregation in PostgreSQL: Deep Technical Analysis ## Core Problem Eager aggregation is a query optimization technique that partially pushes a GROUP BY aggregation past a join operation, per...
## Incremental Update: Committer Acknowledgment No substantive technical progress since the prior analysis. Amit Kapila (committer) responded with a brief acknowledgment: - Confirms the fix "LGTM" (...
## Incremental Update: Robert Haas Pushes Back on Need for New libpq Entrypoint Robert Haas returns after pgconf.dev and directly challenges the fundamental premise of the patch — that a new libpq fu...
# Injection Points: Switching Wait/Wakeup from Latches to Atomics ## Core Problem The injection_points testing infrastructure in PostgreSQL provides a mechanism for test code to synchronize backend...
# COPY ON_CONFLICT TABLE — May 2026 Monthly Summary ## Overview This thread proposes extending PostgreSQL's `COPY FROM` with the ability to redirect rows that violate unique/primary key constraints ...
# Monthly Summary: Fix UPDATE/DELETE FOR PORTION OF with Inheritance Tables (May 2026) ## Overview This thread addresses a correctness bug in PostgreSQL's temporal DML (`FOR PORTION OF`) when applie...
# Monthly Summary: Preserve Replication Origin OIDs in pg_upgrade (May 2026) ## Problem Statement When `pg_commit_ts` SLRU data is migrated byte-for-byte during pg_upgrade, the embedded 2-byte `RepO...
# ECPG: Inconsistent Behavior with GET/SET DESCRIPTOR Multiple Header Items ## Core Problem The ECPG (Embedded SQL in C for PostgreSQL) precompiler has a bug where its **parser accepts syntax that ...
# Index Prefetching for PostgreSQL: Deep Technical Analysis ## The Core Problem PostgreSQL's index scan execution model has a fundamental I/O inefficiency: when performing a regular index scan (btr...
# Technical Analysis: Fix Doubled-Word Typos and Punctuation in Code Comments ## Problem Statement This is a straightforward code quality patch that addresses three instances of doubled-word typos ...
# Beautify Read Stream "Per Buffer Data" APIs ## Core Problem PostgreSQL's read stream infrastructure (introduced to support prefetching and efficient sequential/random I/O patterns) exposes a "per...
# Deep Technical Analysis: Fast-Path Planning for OLTP Star Joins ## The Core Problem PostgreSQL's join order optimization uses dynamic programming (DP) to explore all possible join orderings, buil...
# Uninitialized Memory Access in zic ## Core Problem PostgreSQL's `zic` (timezone compiler) utility, which is used during the build process to compile timezone data files into binary format, contai...
# Bloom Filter Pushdown for Hash Joins: Deep Technical Analysis ## Core Problem Hash joins in PostgreSQL process outer tuples by probing the hash table for each one. When a join is highly selective...
# Technical Analysis: OAuth `shutdown_cb` Documentation Bug ## Core Problem The OAuth validator module API in PostgreSQL 18 includes a `shutdown_cb` callback that implementations can register. Howe...
# Technical Analysis: Fix Recomputation of Required LSN on restart_lsn-only Advancement ## Core Problem The issue resides in `LogicalConfirmReceivedLocation()`, a function in PostgreSQL's logical r...
## Technical Analysis: dependencyLockAndCheckObject() Terminology Fix ### The Core Problem PostgreSQL's dependency tracking system distinguishes between two roles in a dependency relationship: - **...
# Monthly Summary: Startup Process Deadlock — WaitForProcSignalBarriers vs Aux Process (May 2026) ## Overview This thread resolved a long-latent race condition in PostgreSQL's ProcSignalBarrier (PSB...
# Technical Analysis: Secondary Hash to Split Stuck Hash-Join Batches ## The Core Problem: Hash Join Batch Splitting Degeneracy PostgreSQL's hash join executor partitions the inner relation into bat...
# Technical Analysis: Improving REPACK (CONCURRENTLY) Error Messages ## Core Problem The `REPACK (CONCURRENTLY)` feature — a relatively new addition to PostgreSQL that allows online table repacking...
# Make transformAExprIn() Return a Flattened Bool Expression Directly ## Core Problem In PostgreSQL's query transformation pipeline, the function `transformAExprIn()` (located in `src/backend/parse...
# Technical Analysis: Update our timezone code to IANA tzcode2026b ## Core Problem PostgreSQL maintains a vendored copy of the IANA timezone library (tzcode) within its source tree, used to handle t...
No substantive technical progress.
# Monthly Summary: Conflict Log History Table for Logical Replication — May 2026 ## Overview May 2026 saw this proposal mature from a design-settled but implementation-rough state into extensive lat...
# Fix Bug of CHECK Constraint Enforceability Recursion ## Core Problem PostgreSQL 19 introduced the ability to `ALTER TABLE ... ALTER CONSTRAINT ... [NOT] ENFORCED` for CHECK constraints. This new ...
# Technical Analysis: Defensive Hardening of sprintf → snprintf in pg_stat_statements ## Core Problem The `generate_normalized_query()` function in `contrib/pg_stat_statements` uses unbounded `spri...
# ALTER TABLE DROP COLUMN: Handling Whole-Row Referenced Objects ## Core Problem PostgreSQL has a fundamental gap in its dependency tracking system when dealing with **whole-row Var references** in...
No substantive technical progress.
# Technical Analysis: Two Small errhint Cleanups in PG19 Code ## Core Problem This thread addresses two minor but important message quality issues in PostgreSQL 19's error hint (errhint) strings — ...
## Incremental Update: Tom Lane Rejects Patch Due to Platform Portability Concerns ### Summary Tom Lane has responded to the patch with a clear rejection rationale based on cross-platform locale nam...
# Technical Analysis: [PATCH] Little refactoring of portalcmds.c ## Core Problem The patch addresses code duplication in `src/backend/commands/portalcmds.c`, specifically around cursor name validat...
# Technical Analysis: PLpgSQL FOREACH IN JSON ARRAY ## Core Problem PL/pgSQL currently lacks a native iteration construct for JSON arrays. Developers who need to iterate over JSON array elements mus...
## Patch Committed The fix has been committed as `6aa26be288fa` by Michael Paquier on 2026-05-26. ### Additional Issues Found During Commit Michael discovered that the existing test on HEAD (prior ...
No substantive technical progress.
# Future of PQfn(): Retiring PostgreSQL's Fast-Path Function Call Interface ## Core Problem PQfn() is PostgreSQL's "fast path" interface in libpq, which allows clients to invoke server-side functio...
## Incremental Update: New Use Case Advocacy and "Show Everything" Mode Request ### New Developments Two new messages advance the discussion: **1. Jelte Fennema-Nio rejects the TAP-sets-env-var app...
## Incremental Update: Tom Lane's Architectural Distinction Tom Lane provides a brief but technically significant clarification distinguishing this patch from the earlier submission by Josh (referenc...
## Incremental Update ### Amit Kapila's Brief Comment (2026-05-27) Amit Kapila weighs in with a single short statement agreeing that the HINT message approach (from v6-0003's `ReportSlotConnectionEr...
## New Development: Redundant `ecpg_get_connection()` Call in `ecpg_auto_prepare()` The discussion has shifted to a code quality issue tangentially related to the original NULL-connection crash fix. ...
No substantive technical progress.
# Support Loser Tree for K-Way Merge in PostgreSQL ## Core Problem PostgreSQL's external sort implementation uses a binary heap (priority queue) to perform k-way merging of sorted runs during `tupl...
## Incremental Update: Fix Committed and Buildfarm Restored to Green The thread has reached resolution with no further technical debate. Michael Paquier committed the fix and resolved the buildfarm s...
No substantive technical progress.
## Incremental Analysis: Patches Committed ### Summary Fujii Masao confirmed that the patches have been pushed (committed). This is a brief administrative message with no new technical discussion, a...
# Deep Technical Analysis: Data-Level Dependencies in pg_dump/pg_upgrade ## The Core Problem PostgreSQL's `pg_dump` architecture separates output into distinct sections: **pre-data** (schema definit...
# NULL Pointer Dereference in Syslogger with EXEC_BACKEND at Startup ## Core Problem A NULL pointer dereference occurs in PostgreSQL's syslogger process when all of the following conditions are met...
## Richard Guo's PGConf.dev Synthesis and Formal Options Enumeration (v5) Richard returns from PGConf.dev with a significant message that restructures the entire discussion. Rather than defending the...
# Technical Analysis: Adding XML Canonicalization to PostgreSQL
## Core Problem
XML documents can have multiple valid physical representations that are semantically equivalent. For example, `
# Analysis: Documentation Punctuation Fix for UPDATE FOR PORTION OF ## Core Problem This is a minor documentation consistency issue in the newly added `FOR PORTION OF` clause documentation. The `FOR...
# Fix HAVING-to-WHERE Pushdown with Mismatched Operator Families ## Core Problem This thread exposes a family of optimizer correctness bugs where the planner incorrectly pushes filter clauses past g...
# Technical Analysis: Removing Autoanalyze Corner Case in Anti-Wraparound Vacuum ## The Core Problem PostgreSQL's autovacuum system has a subtle and likely unintentional behavioral corner case rela...
## Incremental Update: Review and Commitfest Registration No new technical arguments or patch changes in this round. The only new message is from Aleksander Alekseev, who provides a positive review o...
# Technical Analysis: Expanding refint Documentation with Usage Info ## Core Problem The `refint` contrib module (which provides referential integrity checking via triggers) has been the subject of ...
## Incremental Update: v3 Patch Discussion ### New Patch Version (v3) from Vitaly Davydov Vitaly submitted a revised patch (v3) responding to Fujii's earlier review. Key design decisions in v3: 1. ...
No substantive technical progress.
# Technical Analysis: Including Symbolic SQLSTATE Names in Verbose Error Reports ## Core Problem PostgreSQL's verbose error reporting mode (activated via `\set VERBOSITY verbose` in psql) displays ...
# RFC: Boyer-Moore-Horspool Optimization for LIKE '%pattern%' Searches ## Technical Problem PostgreSQL's `LIKE '%pattern%'` queries perform substring searches using a relatively naive character-by-...
# Analysis: PATCH to Add Introductory Paragraph to Getting Started Chapter ## Core Problem This is a documentation-only patch proposing to add a brief introductory paragraph to the "Getting Started"...
No substantive technical progress.
# Documentation Clarification: ALTER CONSTRAINT Enforceability Wording ## Core Problem The thread identifies a documentation clarity issue introduced by commit `342051d73`, which added support for ...
# Bugfix: Broken Output in Expanded Aligned Format When Data Are Too Short ## Core Problem The bug exists in `src/fe_utils/print.c`, specifically in the `print_aligned_vertical()` function, which h...
No substantive technical progress.
# Technical Analysis: libpq Misleading "Server Crash" Error Messages ## Core Problem libpq, PostgreSQL's client library, contains a long-standing error message pattern that misleads users about the ...
No substantive technical progress.
No substantive technical progress.
## Incremental Update: Proposer Pivots to Lightweight Alternatives The most significant development is that **Nikolay Samokhvalov has explicitly conceded** the year-based versioning proposal and pivo...
No substantive technical progress.
## Incremental Analysis: Community Response to Patch Series Two substantive responses have arrived from Daniel Gustafsson (PostgreSQL committer, SCRAM area expert) and Sehrope Sarkuni (pgjdbc maintai...
# Technical Analysis: Small fixes for CHECKPOINT FLUSH_UNLOGGED ## Context and Background This thread addresses two minor but important polish issues with the recently committed feature "Add FLUSH_U...
# Technical Analysis: Fix check_pub_rdt Bypass When Origin is Set in Same ALTER SUBSCRIPTION ## Core Problem This patch addresses a subtle logic bug in PostgreSQL's `ALTER SUBSCRIPTION` command pro...
# Analysis: Add Regression Test for Mismatched ENCODING and LOCALE in CREATE DATABASE ## Core Problem The PostgreSQL documentation for `CREATE DATABASE` explicitly states that encoding and locale s...
No substantive technical progress.
No substantive technical progress.
No substantive technical progress.
# Analysis: Parallel DML (Write-Side) Support in PostgreSQL ## Core Technical Problem This thread raises a fundamental architectural question about PostgreSQL's parallel execution framework: **why i...
## Minimal New Activity: Brief Post from Satya Narlapuram A new participant (Satya Narlapuram) has posted a very brief message stating "Looks like this committed a case, attached a patch to fix this....
## Lepikhov's Response to Parragi's Review Lepikhov responds to the two issues raised by Zsolt Parragi, but does **not** provide a new patch version. The response is brief and primarily acknowledges/...
# ERROR during COMMIT PREPARED Can Leave Orphaned Locks ## Problem Statement This thread identifies a subtle but serious bug in PostgreSQL's two-phase commit (2PC) implementation where an ERROR occ...
# Splitting pg_resetwal Output Strings: Dynamic Column Alignment for Translatable Output ## Core Problem PostgreSQL's `pg_resetwal` (and similar tools like `pg_controldata`) produce tabular output ...
## Incremental Update: Core Committer Opposition Emerges The most significant development since the initial analysis is that **two core committers** (Tom Lane and Peter Eisentraut) have now weighed i...
No substantive technical progress.
# Fix pg_get_multixact_stats() members_size Calculation ## Core Problem The `pg_get_multixact_stats()` function, introduced to help DBAs monitor multixact storage consumption, contains an integer a...
## Update: Patch Committed The thread has reached its conclusion with the patch being committed. The two new messages are brief confirmations: 1. **Andreas Karlsson** confirmed agreement that the fi...
# Tighten SCRAM Iteration Parsing and Bound libpq PBKDF2 Work ## Core Problem This thread addresses two distinct but related security/correctness issues in PostgreSQL's SCRAM-SHA-256 authentication...
# Permission Elevation via pg_amcheck Operator Overloading Through search_path Manipulation ## Core Problem This thread raises a security vulnerability in `pg_amcheck` — PostgreSQL's built-in tool ...
# Technical Analysis: Report Oldest Xmin Source When Autovacuum Cannot Remove Tuples ## Core Problem PostgreSQL's VACUUM process cannot remove dead tuples that are still visible to any active transa...
## Incremental Analysis: Evgeny's Rebuttal on getaddrinfo() Reliability and DNS Client Concerns Evgeny returns after an 11-day pause with a carefully researched counter-argument to Jacob Champion's p...
# Removing Broken Support for OpenSSL without ECDH ## Technical Problem PostgreSQL's SSL/TLS implementation contains dead code paths guarded by the `OPENSSL_NO_ECDH` preprocessor macro, which was i...
No substantive technical progress.
# Technical Analysis: psql SQLSTATE Macro Name Display in Verbose Error Reports ## Core Problem When PostgreSQL's `psql` client displays verbose error messages (activated via `\set VERBOSITY verbose...
# Technical Analysis: Improving Index Selection for Logical Replication Apply with Replica Identity Full ## Core Problem When PostgreSQL performs logical replication with `REPLICA IDENTITY FULL`, U...
# Technical Analysis: Fix NULL Dereference in Subscription REFRESH on Concurrent DROP ## Core Problem This thread addresses a **crash bug** (segfault) in PostgreSQL's logical replication subscripti...
## New External Tester Report — First Substantive Feedback in Months Solai (solai.cdac@gmail.com) provides the first external testing report since Mahendra's earlier reviews. The message confirms bas...
No substantive technical progress.
# Incremental View Maintenance (IVM) for PostgreSQL — Deep Technical Analysis ## Core Problem Materialized views in PostgreSQL can only be refreshed via `REFRESH MATERIALIZED VIEW`, which recompute...
## Incremental Update: Patches Committed + Post-Commit Review ### Resolution: Both Patches Applied Michael Paquier committed the v3 patch set on 2026-05-22: - **v3-0001** (the CONNECTING visibility...
## Incremental Update: Draft Patch Submitted (v1) Enrique Sánchez has submitted a concrete implementation as a 4-commit patch series implementing Solution 1 (MCV cap for missing values). This moves t...
## Incremental Update: Continued Discussion on Fix Approach The thread has a brief exchange between Kirill Reshke and Álvaro Herrera clarifying positions on the solution approach, but no patches or s...
No substantive technical progress.
# COPY TO BLACKHOLE / pg_dump -j -Fb ## Technical Analysis ### Core Problem This thread, initiated by Jakub Wartak (EDB), proposes the concept of a "COPY TO BLACKHOLE" facility — essentially a mec...
## Incremental Analysis: Detailed Code Review of v2 Patch This round consists of a comprehensive review by Peter Smith (32 review comments) and a brief comment from Jian He (japinli), followed by a s...
## Resolution of the `019_replslot_limit.pl` Race Condition The thread reaches consensus on fixing the replication slot state race exposed by the faster WAIT FOR LSN-based `wait_for_catchup()`. ### ...
No substantive technical progress.
# Optimize LISTEN/NOTIFY: Deep Technical Analysis ## Core Problem PostgreSQL's LISTEN/NOTIFY mechanism suffers from a fundamental scalability bottleneck: **SignalBackends() has no knowledge of whic...
# Rename Postgres 19 to Postgres 26 (Year-Based Versioning) ## Core Problem This thread proposes a fundamental change to PostgreSQL's versioning scheme: shifting from sequential integer major versi...
## Incremental Update: Patch 0004 Pushed, Reverted Due to Buildfarm Failures, Then Re-pushed with Different Test Strategy ### Key Events 1. **Patch 0004 (reject degenerate no-op split) was pushed** ...
# Pg_upgrade Bug with NOT NULL NOT VALID Constraints ## Core Problem This thread identifies a **pg_upgrade compatibility bug** introduced by PostgreSQL 18's treatment of NOT NULL constraints as fir...
# Technical Analysis: Remove Obsolete LISTEN Array Growth Isolation Test ## Core Problem This thread presents a straightforward cleanup patch that removes an isolation test related to LISTEN's inte...
# Feature Request: Native Nanosecond Precision Support for PostgreSQL Temporal Types ## Core Problem PostgreSQL's temporal types (`timestamp`, `timestamptz`, `time`, `interval`) currently provide *...
# Multi-Entry Indexing for GiST & SP-GiST: Deep Technical Analysis ## Core Problem PostgreSQL's GiST (Generalized Search Tree) and SP-GiST (Space-Partitioned GiST) access methods fundamentally assu...
No substantive technical progress.
## Incremental Update: Resolution on v2 Approach + New Bug Discovery ### Convergence on v2 The debate about whether to show timestamp fields during CONNECTING state has resolved. Michael Paquier de...
# Technical Analysis: Reentrancy Guards in ri_triggers.c ## The Core Problem This thread addresses a **use-after-free vulnerability** in PostgreSQL's referential integrity trigger system (`ri_trigg...
# Deadlock Detector Fails to Activate on Hot Standby Replica ## Core Problem This thread identifies a subtle but serious bug in PostgreSQL's hot standby recovery mechanism where the deadlock detecti...
# amcheck Support for BRIN Indexes: Deep Technical Analysis ## Core Problem PostgreSQL's `amcheck` extension provides corruption-detection capabilities for B-tree indexes (and more recently GIN ind...
# Graph Database Developer Meeting at pgconf.dev 2026: Technical Analysis ## Core Problem and Context With basic SQL/PGQ (Property Graph Queries) support committed to PostgreSQL 19, the community fa...
## Incremental Update: Patch Accepted by Committer Michael Paquier (committer) has acknowledged the bug and committed to fixing it. He confirms the root cause as a typo originating from commit `d08c4...
## New in this round: Pyhalov identifies architectural weakness in Korotkov's "no fpinfo on function rel" design — surfaces three concrete problems A single dense message from Pyhalov that challenges...
## Ashutosh Bapat Identifies Two Additional Problems, Plans to Commit Current Patch First Bapat confirms the current patch is ready to commit and should not be blocked by newly discovered issues. He ...
No substantive technical progress.
## Incremental Update: Patch Committed ### What's New Fujii Masao has committed the patch. His message "I've pushed the patch. Thanks!" confirms the fix has been applied to the repository. This clos...
## Incremental Update: Minor Code Review Discussion on Follow-up Patch ### What's New The thread has two new messages that constitute a focused code review exchange between an unnamed reviewer (ah@c...
No substantive technical progress.
## Incremental Update: v5→v6, Test Coverage Added, Version Check Debate Resolved ### New Test Cases (v5) Jim Jones proposed and contributed concrete regression tests for the `\d` deduplication behav...
# Prevent Setting NO INHERIT on Partitioned Not-Null Constraints ## Core Problem PostgreSQL's partitioning system requires that NOT NULL constraints on partitioned tables are always inherited by ch...
# Patch for Bind Message: Unsigned Integer Handling for Parameter and Result Column Format Codes ## Core Technical Problem The PostgreSQL frontend/backend protocol (v3) specifies that certain count...
## Incremental Update: Independent Benchmark Validation by Lepihov ### Summary Lepihov (Andrei Lepikhov) followed up on his earlier suggestion about avoiding unnecessary cache lookups with independe...
No substantive technical progress.
# Extended Statistics Improvement: Multi-Column MCV Missing Values ## Core Problem PostgreSQL's extended statistics system has a significant blind spot in how it handles multi-column Most Common Va...
## Incremental Update: Test Coverage Expansion and Backpatch Strategy ### What's New Fujii Masao reviewed the TAP test proposed by Srinath and identified a gap: the test only verified the group-acce...
# Relfilenode Statistics: Deep Technical Analysis ## The Core Problem PostgreSQL's statistics subsystem (`pgstats`) currently keys relation-level statistics by the relation's OID. This creates a fu...
## Incremental Update: v2→v4 Patch Evolution and Scope Expansion ### Key Development: Scope Expanded to `\d+` Command Jim Jones identified an analogous redundancy problem in the `\d+` (describeOneT...
# Technical Analysis: Ternary Reloption Type Patch Review ## Core Problem PostgreSQL's relation options (reloptions) system historically supported boolean, integer, real, enum, and string types. Se...
# Technical Analysis: Review Observations for COPY ON_ERROR_TABLE Patch ## Core Problem The COPY ON_ERROR_TABLE feature extends PostgreSQL's existing `COPY ... ON_ERROR` mechanism (introduced in Po...
# Technical Analysis: Failure in test_slru for host gokiburi (REL_16_STABLE only) ## Core Problem This thread identifies a subtle bug in the `test_slru` contrib module's LWLock initialization logic ...
## New Bug: `wait_for_catchup()` with WAIT FOR LSN Causes Race in Replication Slot State Tests Alexander Korotkov reports a **new class of test failure** caused by the WAIT FOR LSN-based `wait_for_ca...
# Fix pg_stat_wal_receiver to Show CONNECTING Status ## Core Problem Commit `a36164e74` introduced a `WALRCV_CONNECTING` state to the WAL receiver subsystem, explicitly motivated by monitoring use ...
## Incremental Update: Proposal for Centralized DefElem Option Handling A new participant (Thom) raises an architectural question about the root cause of the duplicate-option bug: the lack of shared ...
## Incremental Analysis: Review Discussion on Backpatching and Test Placement ### Summary of New Activity Fujii Masao reviewed the patch set and provided feedback on two key areas: (1) test placemen...
# Technical Analysis: Make the Logical Replication Conflict Messages More Like Each Other ## Core Problem The logical replication subsystem in PostgreSQL generates conflict messages (via `conflict.c...
# Deep Technical Analysis: VACUUM FULL / CREATE INDEX Fails with "missing chunk number 0 for toast value" ## Core Problem This thread identifies a subtle but serious consistency bug in PostgreSQL's ...
# Support LIKE with Nondeterministic Collations ## Core Problem PostgreSQL's nondeterministic collations (introduced by Peter Eisentraut) enable case-insensitive, accent-insensitive, and other Unic...
## Incremental Update: New Participant Shares Concrete Implementation Work ### What's New Greg Burd has responded to Pavel Stehule's original post with a concrete (though incomplete) implementation ...
## What's New A single follow-up from **Daniel Gustafsson** confirming the fix has been **committed and backpatched to v18**. Key new data points: 1. **Commit is done.** The fix has been pushed to t...
## New in this round: Korotkov posts v5 addressing all five Pyhalov bugs, then two rapid follow-up fixups for whole-row Var edge cases in DirectModify/outer-join paths This round shows the patch ente...
# Technical Analysis: Review Observations for Partial REFRESH MATERIALIZED VIEW Patch ## Core Problem Materialized views in PostgreSQL currently support only full refresh semantics — the entire mat...
# Technical Analysis: Unbounded Wait to Reach Consistent Recovery State After pg_rewind ## Core Problem After `pg_rewind` is used to resynchronize a former primary with a new primary, the rewound n...
No substantive technical progress.
## v3 Patch Committed + Follow-up Cleanup Patch ### Key Development: Patch Committed Álvaro Herrera has **committed** the v3 patch (PG_ENSURE_ERROR_CLEANUP approach) with minor cosmetic/comment chan...
No substantive technical progress.
No substantive technical progress.
# Fix Incorrect Size Check in `statext_dependencies_deserialize` ## Core Problem The function `statext_dependencies_deserialize()` in PostgreSQL's extended statistics subsystem contains a bug in it...
## Incremental Update: Alternative Approaches Explored and Dismissed ### Shveta's Agreement and New Alternative Ideas Shveta Malik formally endorsed Approach 2 (origin creation timestamp) as the mos...
## Patch Committed Daniel Gustafsson's single-word "Done." confirms the 32-bit atomics removal patch has been committed to HEAD. No new technical discussion, no new arguments, no new participants. Th...
No substantive technical progress.
# COPY FROM ON_ERROR SET_NULL Bypasses Domain NOT NULL with Partial Column List ## Core Technical Problem This thread addresses a memory safety bug in PostgreSQL's COPY FROM implementation that caus...
# Technical Analysis: Fix Minimal Typo in OAuth ## Core Problem This is a trivial cosmetic fix addressing a minor typo in PostgreSQL's OAuth authentication code — specifically a forgotten/missing q...
No substantive technical progress.
## Incremental Update: Patch v2 Posted by Ayush Tiwari Ayush Tiwari has posted v2 of the patch on behalf of / building on Satya's original fix, addressing the style review comments from Ashutosh Bapa...
## Incremental Update: Patches 0001-0003 Committed, Collation Bug Found in 0004 ### Major Development: Patches Committed Alexander Korotkov pushed patches 0001 through 0003 (the core bound-overlap b...
## Incremental Update: Paul Jungwirth (FOR PORTION OF author) Responds Paul Jungwirth, the author of the `FOR PORTION OF` implementation, has weighed in and taken a clear position **against** treatin...
# Technical Analysis: refint Plan Cache Bug and Resolution ## The Core Problem The `contrib/spi/refint` module provides `check_foreign_key()` and `check_primary_key()` trigger functions that implem...
# Move FOR PORTION OF Checks Out of Analysis ## Core Problem The `FOR PORTION OF` feature (a temporal/period-based SQL construct being added in PostgreSQL 19) has validation checks that are current...
# Technical Analysis: vacuumdb --exclude-database Option ## Core Problem The `vacuumdb --all` command in PostgreSQL's client utilities vacuums every connectable database on a cluster without except...
No substantive technical progress.
## Incremental Update: Scope Expansion to Composite Types and Arrays ### New Technical Direction: Beyond Domains Sami Imseih proposes extending `vacuumlo`'s column scanning beyond just domain resol...
# Fix Small Issues of pg_restore_extended_stats() ## Technical Context `pg_restore_extended_stats()` is part of PostgreSQL's statistics import/export infrastructure, which allows `pg_dump`/`pg_rest...
# Technical Analysis: Misleading Error Message in ProcessUtilitySlow T_CreateStatsStmt ## Core Problem This thread begins with a seemingly simple observation about a misleading error message but ev...
## Incremental Analysis: v3 Patch Using PG_ENSURE_ERROR_CLEANUP ### Key Technical Development The thread has converged on a third approach after both v1 and v2 were found to have fundamental flaws. ...
# pgstat: Flush Some Statistics Within Running Transactions, Take 2 ## Core Problem PostgreSQL's statistics subsystem (`pgstat`) accumulates counters in backend-local memory and only flushes them t...
## Incremental Update: v2 Patch Posted Paul Jungwirth posted a v2 of his own patch for this issue. The key technical development: ### Patch Evolution: v1 → v2 - **v1** (referenced but not in this m...
# Technical Analysis: postgres_fdw User Mapping Inconsistency in ANALYZE with restore_stats ## Core Problem When `ANALYZE` is run on a foreign table managed by `postgres_fdw`, the system must establ...
## Incremental Update: Minimal Progress — Consensus Forming on Pragmatic Fix The two new messages are brief and contain no new technical content, patches, or architectural arguments. They represent a...
# Technical Analysis: Review Comments on createPartitions() in pgbench.c ## Core Problem This thread raises code robustness concerns in the `createPartitions()` function within `pgbench.c` — Postgr...
No substantive technical progress.
No substantive technical progress.
## Incremental Update: New Scenario Discussion and Scope Clarification ### New Technical Discussion: ALTER SUBSCRIPTION Publisher-Switching Scenario Shveta Malik raised a new scenario that extends t...
# Technical Analysis: pg_get_publication_ddl Function ## Core Problem PostgreSQL lacks a built-in function to reconstruct the DDL (Data Definition Language) statement for PUBLICATION objects. This ...
# Technical Analysis: Null Pointer Dereference in FOR PORTION OF with Views and INSTEAD OF Triggers ## Core Problem A null pointer dereference crash occurs in PostgreSQL 19 when combining three fea...
## Incremental Update: Committer Attribution Concern The only new message is from **Bruce Momjian**, who attempted to commit the patch but hit a procedural/policy obstacle rather than a technical one...
# Technical Analysis: Avoiding Table Rewrite When Setting Column Type to Constrained Domain ## Core Problem When PostgreSQL executes `ALTER TABLE ... ALTER COLUMN ... SET DATA TYPE`, it traditional...
## Incremental Analysis: New Response from Huseyin ### Summary A new participant (Huseyin) responds with approval of the patch but raises a tangential but technically interesting observability conce...
# Technical Analysis: REPLICA IDENTITY USING INDEX Accepts Columns with NOT NULL NOT VALID ## Core Problem This bug report identifies a logical replication correctness issue introduced as a side ef...
## Patch Committed and Back-Patched The primary development this round is that **Alexander Korotkov pushed the fix** on 2026-05-14. The commit covers master, with back-patches to PG17 and PG18 requir...
# Technical Analysis: Redundant/Mis-use of _(x) gettext Macro ## Core Problem This thread begins with what appears to be a simple cleanup — removing seemingly unnecessary `_()` gettext macro wrappi...
## Incremental Update: Thread Resolved — Patch Reviewed, Refined, and Pushed ### Summary The thread reached resolution quickly. Tatsuo Ishii reviewed the original patch, suggested a clean encapsula...
No substantive technical progress.
# DOCS: Describe Missing Parameters on CREATE/ALTER PUBLICATION Pages ## Core Problem The PostgreSQL documentation for `CREATE PUBLICATION` and `ALTER PUBLICATION` SQL commands contains an inconsis...
# Deep Technical Analysis: FATAL Message Lost Inside libpq During Standby Logical Decoding ## Core Problem The test `035_standby_logical_decoding` intermittently fails on the buildfarm because a FA...
# Bug Analysis: pg_rewind Produces Unusable but Starting Database with Standby Recovery ## Core Problem This thread identifies a subtle and dangerous bug in PostgreSQL's recovery infrastructure whe...
# Analysis: PostgreSQL Hacker Mentoring Program 2026 — Call for Applications ## Overview This thread documents the third year of Robert Haas's 1:1 hacker mentoring program, which pairs aspiring Post...
No substantive technical progress.
## New Developments (Since Prior Analysis #3) ### Jeff Davis posts v5 — a 4-patch series addressing Evan's tablesync-slot concern (2026-05-14) Jeff restructured his approach into a more granular ser...
# Technical Analysis: Set calcSumX2 = true in numeric_(poly_)deserialize ## Core Problem This thread addresses a subtle but semantically important bug in PostgreSQL's aggregate deserialization func...
## Incremental Update: Alexander Korotkov Takes Over Patch Revision, Signals Intent to Commit ### Key Development Alexander Korotkov (Supabase) has reviewed and revised the 4-patch series, making su...
No substantive technical progress.
# Analysis: Trivial Comment Fix in pgstat_assoc_relation() ## Core Problem This is a minor code hygiene issue in PostgreSQL's statistics subsystem. The function `pgstat_assoc_relation()` contains a...
# libpq Async API Deadlock with SSL Records >8kB ## The Core Problem The libpq asynchronous API has a fundamental architectural flaw: it assumes that after calling `pqReadData()` once, if no comple...
## Incremental Update: Ashutosh Bapat's Review and v3 Patch Restructuring ### New Reviewer: Ashutosh Bapat (2026-05-14) Ashutosh Bapat, a key contributor to SQL/PGQ infrastructure, weighed in with a...
## Incremental Update: v23 Patch Set Submitted The author (hukutoc@gmail.com) has submitted v23, addressing most of Alexander Korotkov's 8 review points from the previous round. The key development i...
# Deep Technical Analysis: Reducing EXPLAIN ANALYZE Timing Overhead via RDTSC ## Core Problem EXPLAIN ANALYZE with TIMING ON in PostgreSQL nearly **doubles** query execution time for simple, row-in...
# SQL Property Graph Queries (SQL/PGQ) - Deep Technical Analysis ## Problem Statement This thread tracks the implementation of SQL Property Graph Queries (SQL/PGQ) as specified in SQL:2023 (ISO/IEC...
# Re-adding Regression Tests for ltree and intarray: Stack Depth and Platform-Specific Recursion Failures ## Core Problem Regression tests for the `ltree` and `intarray` contrib extensions were **r...
# Fix Bug of COPY TO Support Partition Table ## Core Problem The "Support COPY TO for partitioned tables" feature introduced a bug in the attribute mapping logic when converting partition tuples to...
# Technical Analysis: Exposing Checkpoint Timestamp and Duration in pg_stat_checkpointer ## Core Problem PostgreSQL's checkpointer process is critical to database reliability — it ensures dirty buf...
# Logical Replication: Revisiting `is_table_publication` and `is_schema_publication` Implementation ## Core Problem In PostgreSQL's logical replication subsystem, two internal functions — `is_table...
No substantive technical progress.
# Fix the Race Condition for Updating Slot Minimum LSN ## Core Problem This thread addresses a race condition in PostgreSQL's replication slot WAL reservation mechanism that can lead to **premature...
No substantive technical progress.
# Technical Analysis: Improving Test Failure Output in PostgreSQL's Meson Build System ## Core Problem PostgreSQL's test infrastructure, particularly when using the Meson build system, produces deep...
# Fix Bug of COPY (on_error set_null) — Array Indexing Mismatch ## Core Problem This thread reports a **memory safety bug and correctness violation** in the recently added `COPY ... (on_error set_n...
# Deep Technical Analysis: DELETE/UPDATE Corruption in Partitioned Foreign Tables ## The Core Problem This thread addresses a data corruption bug in PostgreSQL's Foreign Data Wrapper (FDW) infrastr...
## New Participant Takes Over Patch, Rapid Iteration to v3, Then Committer Revision ### Original Author Steps Back Zeng Man (original reporter/patch author) explicitly stated they are too busy with ...
## Incremental Update: New Review from Solai A new participant (Solai) has posted a review/testing report that adds modest technical substance to the discussion, primarily reinforcing existing argume...
# Technical Analysis: Add a Guard Against Uninitialized Default Locale ## The Core Problem This thread addresses a **defensive programming concern** in PostgreSQL's locale/collation infrastructure:...
# Add Missing Period to HINT and DETAIL Messages ## Core Problem PostgreSQL has a documented error message style guide that mandates: "Detail and hint messages: Use complete sentences, and end each...
# pg_stash_advice: Crash Loop from Overlong Stash Name in Persistence Dump File ## Executive Summary This thread reports a serious availability bug in the `pg_stash_advice` extension (apparently a ...
# Simplify Signature of ProcessStartupPacket() ## Technical Problem This thread addresses a code cleanup opportunity in PostgreSQL's connection startup path. The function `ProcessStartupPacket()` —...
# Fix Array-Element Quoting in postgres_fdw Import Statistics ## Core Problem The `postgres_fdw` extension's statistics import feature (`ANALYZE` on foreign tables) constructs a remote query agains...
# Lazy Snapshot Distribution in Logical Decoding ## Core Problem: O(N²) Snapshot Growth in the Reorder Buffer This patch addresses a fundamental scalability problem in PostgreSQL's logical decoding...
## Incremental Update: Buildfarm Client Bug Fixed for Log Capture (2026-05-16) Andrew Dunstan reports he has identified and fixed the buildfarm client bug that was preventing `pg_upgrade_output.d/` l...
# pg_recvlogical: File Permission Bug Analysis ## Core Problem `pg_recvlogical` is PostgreSQL's tool for receiving logical replication changes from a source cluster. Its documentation claims it pre...
# Bug Analysis: mdunlinkfiletag Unlinks Wrong Fork/Segment ## Core Problem The `mdunlinkfiletag()` function in PostgreSQL's magnetic disk (MD) storage manager has a latent bug where it always unlin...
# Technical Analysis: LIKE Fails to Match Literal Backslashes with Nondeterministic Collations ## Core Problem PostgreSQL's LIKE operator produces incorrect results when matching patterns containin...
# Technical Analysis: pg_get_subscription_ddl() Function Patch ## Core Problem PostgreSQL lacks a built-in function to reconstruct the DDL (Data Definition Language) statement for logical replicati...
No substantive technical progress.
## Incremental Update: REPACK Option Parsing Bugs Discovered and Fixed The original tab-completion patch has been committed. More significantly, Fujii discovered two additional **server-side parsing ...
# Technical Analysis: SCRAM Passthrough Option Precedence in postgres_fdw and dblink ## Core Problem PostgreSQL's foreign data wrapper infrastructure (postgres_fdw and dblink) supports the `use_scr...
# Technical Analysis: Determinism of pg_dump Table Output Ordering ## Core Problem A user observed that two semantically identical PostgreSQL schemas—one created from scratch via DDL scripts and on...
## Incremental Update — Buildfarm Preparation (May 16) The thread advanced on the operational/infrastructure side, not on patch content. ### Key Development: Buildfarm Client Updated Andrew Dunstan...
## Incremental Update — 2026-05-14 through 2026-05-16 ### Summary A new reviewer (Zsolt Parragi from Percona) joined the thread and surfaced three concrete issues with the patch. Two were real bugs...
# Documentation Gap: Invalid Index Skipping During ATTACH PARTITION ## Core Problem When `ALTER TABLE ... ATTACH PARTITION` is executed, PostgreSQL attempts to match indexes on the partition being ...
# Technical Analysis: Truncate Logged Statements by Maximum Length ## Core Problem PostgreSQL's logging infrastructure has no built-in mechanism to limit the size of individual logged statements. W...
# Deep Technical Analysis: Fixing WAL Segment Creation Accounting in `log_checkpoints` ## The Core Problem PostgreSQL's `log_checkpoints` output includes a field "WAL file(s) added" (internally `ck...
## Incremental Update: Review Progress and Duplicate Slot Bug Discovery ### Summary Shveta Malik continues her review of the v-latest patch series, reporting that the patch reordering (0001 parser r...
# PSQL Publication Describe Command: Filtering Redundant Table Listings ## Core Problem The `\dRp+` command in psql (which describes publications in detail) displays redundant information when a pu...
No substantive technical progress.
# Documentation Fix: pg_restore_extended_stats() Example Syntax Error ## Core Problem A trivial but potentially confusing typo was identified in the PostgreSQL documentation for the `pg_restore_ext...
# Sequence Access Methods: A Deep Technical Analysis ## The Core Problem PostgreSQL's sequence infrastructure is monolithic: every sequence stores its state (last_value, is_called, log_cnt) in a si...
## Patch Committed and CF Entry Closed Fujita pushed the patch on 2025-05-14, confirming the fix is now in the tree. He did not extend the test coverage beyond his v2 patch (i.e., Zhenwei Shang's sug...
## What's New in This Round This round contains only two messages: Ishii adding pgsql-hackers to the CC (a procedural action with no technical content), and chenloveit's reply which introduces a **ne...
## Incremental Update: Amit Kapila Responds, Pushes Back on Documentation Need ### What's New Amit Kapila has responded to the original thread with a counterargument that significantly reframes the ...
No substantive technical progress.
No substantive technical progress.
## New Activity: Ashutosh Bapat Weighs In — Argues *Against* the ReleaseSysCache Fix The only new message is from Ashutosh Bapat, who provides a surprising counter-argument to the one remaining techn...
## Incremental Update: v2 Patch Submitted Evan Li has responded to Álvaro Herrera's feedback and submitted a v2 patch that follows the suggested direction: replacing the `StringInfo` usage with a pur...
## Incremental Update: v3 Patch — GUC Encoding Reversal and Naming Changes ### Key Development: Paquier Abandons the Separate GUC Integer Encoding The most significant change in this round is Michae...
## Incremental Update: v2 Patch Posted (Bug Fix Only) The v2 posting is a minor bug-fix revision with no design changes. The substantive new information is minimal. ### What's New **UBSan-detected ...
No substantive technical progress.
No substantive technical progress.
## Incremental Update: Minor Editorial Feedback on Release Announcement Draft Two new messages have appeared since the initial solicitation. The thread remains **purely administrative** with no techn...
## Incremental Update: Ashutosh Bapat responds to Peter Eisentraut's concerns Ashutosh's reply addresses the two specific blockers Peter raised in his previous message: ### 1. Patch Application Issu...
## Incremental Update: Concurrency Concern Resolved ### Key Development Ashutosh Bapat addressed Peter Eisentraut's concurrency/locking concern — the most substantive open issue from the prior analy...
## New in this round: Pyhalov stress-tests Korotkov's v4, finds five concrete bugs/regressions — reveals that the IMMUTABLE-only tightening came at the cost of dropping safety checks that were load-b...
## Incremental Update: Yugo Nagata's Detailed Review of v2 Patch (2026-05-12) Yugo Nagata provides a focused code-level review of the v2 patch with three specific technical concerns. No new participa...
## First Community Review: Matthias van de Meent Provides Detailed Technical Feedback The thread's first substantive community response has arrived from Matthias van de Meent, an experienced nbtree ...
## Incremental Update: Reviewer Feedback from Ashutosh Bapat Ashutosh Bapat (a committer/reviewer familiar with SQL/PGQ internals) has responded with concrete review feedback on the patch. No new pat...
## Incremental Update — 2026-05-12 ### Summary The two new messages are brief acknowledgments with no new technical arguments, no new patches, and no design changes. The thread has moved to **Ready ...
No substantive technical progress.
## Incremental Update: Thread Progress Since Last Analysis ### Summary of New Activity The thread has moved from design debate to **pre-commit finalization**. Two new participants surfaced specific ...
## New Developments in This Round This round contains a mix of editorial corrections and one substantively important meta-discussion about release-note inclusion criteria. ### Editorial Corrections ...
## New Review from Masahiko Sawada (Committer) Masahiko Sawada (sawada.mshk@gmail.com) has entered the thread with a substantive review dated 2026-05-12, raising four distinct points that challenge o...
## Incremental Update: Thread Response and Resolution Direction ### Summary The thread received responses from Michael Paquier and Tom Lane, both pushing back on documenting the operator-backing fun...
No substantive technical progress.
## New Technical Substance from Ashutosh Bapat Ashutosh Bapat provides a substantive architectural review that reframes the fix from "permanent rejection" to potentially "temporary limitation," and r...
## Ashutosh Bapat Challenges the Fundamental Premise of the Patch The first review response has arrived, and it **questions whether the bug being fixed actually exists**. ### Core Technical Objectio...
## Incremental Update: Shveta Malik's Detailed Code Review of Patch 003 This round consists of two messages from Shveta Malik providing a thorough code-level review of patch 003 (the core dependency...
## Incremental Update: Patch Moving Toward Commit ### Summary Fujita has taken ownership of the patch, produced an updated version (v2) with expanded test coverage, and signaled intent to push. Ayus...
# Update: Patch Committed Peter Eisentraut committed the fix on 2026-05-13. His message is a terse "committed" — no further technical discussion, no revisions requested, no objections raised. This c...
## Round 3: Patch committed, new issue raised about GiST clustering semantics in REPACK ### Key Development: v3 pushed by Álvaro Álvaro Herrera took v3, made one further optimization (computing the ...
## Incremental Update: Peter Eisentraut responds, discussion converges on comment-only fix ### Summary of New Exchange Peter Eisentraut responds to Haas's "Thoughts?" solicitation with a substantive...
## New: External Review Identifies Correctness Bug in Bound Propagation Zsolt Parragi (Percona) provides the first external review of the patch, raising two significant issues — one a potential **cor...
No substantive technical progress.
No substantive technical progress.
## Patch Arrives: `insert_pulled_up_sublink_join` Implementation The key development since the last analysis is that Lepikhov has posted the **concrete patch** implementing the structural fix he des...
## Incremental Update: Rounds since prior analysis ### Summary Three new messages advance the thread on two fronts: (1) Dolgov pushes back on Cary Huang's suggestion to elide rows on `NID_undef`, ci...
## Incremental Update: v1 → v2 Patch Evolution and Review Convergence ### Patch v1 (2026-05-12) Junwang posted v1 as an attachment (resolving the earlier corporate-security friction that prevented a...
# Technical Analysis: Adding TAP Tests for contrib/oid2name ## Core Problem The `contrib/oid2name` utility in PostgreSQL is a command-line tool that resolves OIDs (Object Identifiers) to human-read...
# Analysis: Are Extended Statistics Intentionally Not Propagated to Partitions? ## Core Problem This thread raises a fundamental architectural question about how PostgreSQL's extended statistics sy...
# SUBSCRIPTION SERVER ALTER/DROP Operations Stuck When User Mapping Is Dropped ## Core Problem This thread exposes a dependency management gap in PostgreSQL's new `CREATE SUBSCRIPTION ... SERVER` fe...
# Deep Technical Analysis: Hashed ScalarArrayOpExpr Equality Semantics ## Core Problem This thread surfaces a subtle but architecturally significant semantic gap in PostgreSQL's hashed evaluation p...
# SQL/JSON JSON_TABLE PLAN Clause — Technical Analysis ## Core Problem The SQL/JSON standard defines a `PLAN` clause for `JSON_TABLE()` that controls how multiple NESTED paths are joined together wh...
# Documentation Patch: standard_conforming_strings Dump/Restore Incompatibility in PostgreSQL 19 ## Core Problem PostgreSQL 19 made a significant backward-compatibility-breaking change via commit 4...
# Technical Analysis: Migration of pg_commit_ts Directory During pg_upgrade ## Core Problem PostgreSQL's `pg_upgrade` utility does not migrate the `pg_commit_ts` directory when upgrading a cluster....
# Fix pg_stat_statements Display of Normalized FETCH Counts ## Core Problem This thread addresses a subtle behavioral inconsistency in `pg_stat_statements` (PGSS) related to how normalized query te...
# Incorrect Checksum in Control File with EXEC_BACKEND Builds ## Core Problem PostgreSQL's `pg_control` file is a critical data structure that stores database cluster state information (checkpoint ...
# Bypassing Cursors in postgres_fdw to Enable Parallel Plans ## The Core Problem PostgreSQL's `postgres_fdw` uses SQL-level cursors (`DECLARE CURSOR` / `FETCH`) to retrieve data from remote servers...
# Proposal: Adding Compression of Temporary Files in PostgreSQL ## The Core Problem PostgreSQL's query executor spills intermediate results to temporary files when `work_mem` is exhausted. This hap...
# Technical Analysis: Fix Infinite Recursion When Foreign Table References Itself ## The Core Problem When a foreign table is created using `postgres_fdw` with a loopback server configuration that ...
# Technical Analysis: Add psql Tab Completion Support for FOR PORTION OF ## Core Problem PostgreSQL's temporal tables feature introduces the `FOR PORTION OF` clause, which is used in `UPDATE` and `...
# Feature: DNS SRV Record Discovery for libpq ## The Core Problem PostgreSQL's client library (libpq) currently requires clients to know the exact hostnames and ports of database servers at connect...
# Technical Analysis: libpq Address Iteration on target_session_attrs Mismatch ## Core Problem When libpq resolves a hostname to multiple IP addresses (via DNS A records), and a TCP connection succ...
# Add \pset Options for Boolean Value Display ## Core Problem PostgreSQL's `psql` client displays boolean values as the single characters `t` and `f`, which are the wire-format representations from...
# Technical Analysis: xact_rollback Spikes from Logical Walsender Exit ## Core Problem PostgreSQL's logical replication decoding pipeline has a subtle interaction with the database statistics subsy...
# PostgreSQL 19 Beta 1 Release Date Announcement ## Overview This is a release-management coordination message from Jonathan Katz announcing the planned release date for PostgreSQL 19 Beta 1. While...
# Technical Analysis: REPACK Decoding Worker Leak on FATAL Exit ## The Core Problem This thread addresses a resource leak bug in PostgreSQL's `REPACK (CONCURRENTLY)` infrastructure where a forced b...
# Technical Analysis: psql Tab Completion Missing IO Option for EXPLAIN ## Core Problem When commit `681daed9316` introduced `EXPLAIN (IO)` as a new boolean option in PostgreSQL, the corresponding ...
# Plug-in Coverage Hole for pglz_decompress() ## Core Problem This thread addresses a **test coverage gap** in PostgreSQL's built-in LZ compression/decompression implementation (`pg_lzcompress.c`),...
# Fix Unsafe PlannedStmt Access in pg_stat_statements ## Core Problem In PostgreSQL's `pg_stat_statements` extension, the `pgss_ProcessUtility()` hook has a well-documented invariant: after calling...
# Fix jsonpath .split_part() to Honor Silent Mode ## Core Problem PostgreSQL's jsonpath execution engine has a well-established contract: when `silent => true` is passed to jsonpath query functions...
# Technical Analysis: Use-After-Free in Property Graph Orphan Static Lists on Transaction Abort ## Overview This thread presents a short-lived bug report that was ultimately retracted. The submitte...
# Import Statistics in postgres_fdw: Deep Technical Analysis ## Core Problem When PostgreSQL performs `ANALYZE` on a foreign table managed by `postgres_fdw`, it must collect a representative sample...
# synchronized_standby_slots Behavior Inconsistent with Quorum-Based Synchronous Replication ## Core Problem PostgreSQL's `synchronized_standby_slots` GUC, introduced to support logical replication...
# Technical Analysis: Fix psql Tab Completion for REPACK Boolean Options ## Core Problem The psql tab-completion system in PostgreSQL has a bug in how it matches parenthesized boolean options for t...
# Analysis: DuckDB's Extensible Parser as Inspiration for PostgreSQL ## Core Problem PostgreSQL's SQL parser is monolithic and tightly coupled to the server's grammar definition (`gram.y`). This ma...
# Technical Analysis: Adding `last_execution_start` to pg_stat_statements ## The Core Problem `pg_stat_statements` is PostgreSQL's most widely-used monitoring extension, yet it lacks a fundamental ...
# FOR PORTION OF Should Reject GENERATED Columns ## Technical Problem This thread addresses a validation gap in PostgreSQL's `FOR PORTION OF` functionality — a feature related to temporal/period-aw...
# Technical Analysis: Replacing Obsolescent `egrep` with `grep -E` in PostgreSQL Build Tools ## Core Problem Modern GNU grep implementations have begun emitting warnings when the `egrep` command is...
# Technical Analysis: Fix errhint Messages for REPACK (CONCURRENTLY) Restrictions ## Core Problem This patch addresses a cosmetic but user-facing consistency issue in PostgreSQL's error hint message...
# Fix SPLIT PARTITION Bound-Overlap Bug and Related Improvements ## Core Problem: Silent Partition Bound Corruption The thread reports a critical correctness bug in PostgreSQL's `ALTER TABLE ... SP...
# Technical Analysis: `pg_current_vxact_id()` — Exposing Virtual Transaction IDs via SQL ## Core Problem PostgreSQL assigns every backend a **Virtual Transaction ID (VXID)** — a lightweight identifi...
## Incremental Analysis: Rounds 2–7 (2026-05-11 to 2026-05-14) ### Summary The thread shifts from patch development to **evaluation methodology debate and scoping decisions**. No new patch version ...
# Remove Invalid SS2/SS3 Handling from EUC-KR Routines ## Core Problem PostgreSQL's EUC-KR encoding implementation carries vestigial SS2 (0x8E) and SS3 (0x8F) single-shift byte handling inherited f...
# Technical Analysis: Adding Lock Failure Details to PostgreSQL Logs (FOR UPDATE NOWAIT) ## Core Problem When PostgreSQL encounters a lock conflict with `FOR UPDATE NOWAIT`, the operation fails imm...
# Technical Analysis: Should IGNORE NULLS Cache Nullness for Volatile Arguments? ## Core Problem The thread raises a subtle correctness concern with PostgreSQL's implementation of `IGNORE NULLS` su...
# Improve Conflict Detection When Replication Origins Are Reused ## The Core Problem: Stale Origin IDs Causing Silent Conflict Misses This thread addresses a subtle but architecturally significant ...
# Technical Analysis: Add pg_stat_kind_info System View ## Core Problem PostgreSQL 17 introduced pluggable cumulative statistics via commit 7949d959458, allowing extensions to register custom stati...
# Vacuumlo Silent Data Loss with Domain-over-OID Columns ## Core Problem The `vacuumlo` utility — PostgreSQL's tool for removing orphaned large objects — has a fundamental blind spot in its column-...
# pgbench: Thread-Safety Bug in Verbose Error Messages ## Core Problem A thread-safety bug was discovered in pgbench's `printVerboseErrorMessages()` function. The function uses a **function-local `...
# Experimental Patch for Terminating VACUUM Freeze Blockers ## The Core Problem: VACUUM Failsafe Cannot Overcome Horizon Blockers PostgreSQL's anti-wraparound VACUUM mechanism has a well-known arch...
No substantive technical progress.
# COPY FROM with Row-Level Security: Bridging the Bulk-Load / Policy Enforcement Gap ## Background and Architectural Problem PostgreSQL's Row-Level Security (RLS) machinery is tightly coupled to the...
# Analysis: Reducing pg_stat_statements LWLock Contention (GSoC 2026) ## Architectural Context `pg_stat_statements` is the de facto standard query-performance telemetry extension in PostgreSQL. Its ...
## New in this round (single reply from Alexandre Felipe, 2026-05-10) Alexandre responds to Zsolt's IEEE-Inf/NaN critique. The message is substantive: it shifts from "fix this one case" to **enumerat...
## Overview Andrei Lepikhov proposes extending PostgreSQL's join planning to opportunistically generate **pre-sorted outer paths for NestLoop joins** when the outer relation's columns appear as a pre...
## Overview This short thread concerns a minor but architecturally interesting cleanup in `src/backend/replication/logical/tablesync.c`, specifically in the `copy_table()` function used by logical re...
## Thread Overview This is a single-message documentation-oriented thread raising a subtle but legitimate concern about the behavior of `CREATE PUBLICATION ... FOR ALL TABLES EXCEPT` (and related `EX...
## What's New ### Evan endorses Jeff's approach — position shift Evan Chao (the original patch author) explicitly concedes that Jeff Davis's alternative is "a better approach." This effectively ends ...
# Thread Analysis: Adjust error message to reflect the inheritance relationship ## Core Problem The thread raises a minor but legitimate user-experience issue in PostgreSQL's DDL error reporting for...
No substantive technical progress.
## What's New in This Round This round brings **two committers into the thread for the first time** (Peter Eisentraut and Tatsuo Ishii), which materially changes the social weight of the discussion —...
# Subquery Pull-Up vs. Join Collapse Limits: A Planner Search-Space Problem ## The Core Architectural Problem PostgreSQL's planner has long used two escape hatches — `from_collapse_limit` and `join_...
# Analysis: pg_bsd_indent / pgindent — Formatting of Multiline Comments ## Core Problem PostgreSQL's source tree has historically tolerated two common styles for multiline block comments: ```c /* T...
## New in this round: Alexander Korotkov takes over the patch, tightens shippability to IMMUTABLE, and fixes a real planner limitation around multi-foreign-table joins This is a significant round. A ...
## What's New in This Round The discussion has shifted decisively **away from Chao's v2 HINT-based compromise** toward two converging "do less" positions, with a new committer-level voice (David G. J...
# Analysis: Making NumericVar Storage Semantics Explicit ## Context and Architectural Background PostgreSQL's `numeric` type has two distinct representations that the code juggles constantly: 1. **...
# Deep Analysis: Random pg_upgrade 004_subscription Test Failure on drongo ## Core Problem: Windows STATUS_DELETE_PENDING Race in Relation Storage Creation The thread concerns a long-standing, flaky...
## Overview This is a single-message documentation report on pgsql-hackers rather than a full design discussion. Marcos points out that a set of underlying SQL-callable functions backing the `jsonb` ...
# Making ENUM Operators LEAKPROOF — Technical Analysis ## The Core Problem PostgreSQL's `LEAKPROOF` function attribute is a promise to the planner: the function will not leak information about its a...
# UPDATE/DELETE FOR PORTION OF on Updatable Views: Rewriter Assertion Failure and Server Crash ## Core Problem This thread reports a bug in PostgreSQL 19's temporal table feature — specifically the ...
No substantive technical progress.
# pg_dump Dependency Loop for PROPERTY GRAPH Objects ## Core Problem PostgreSQL's SQL/PGQ `PROPERTY GRAPH` feature (an emerging SQL:2023 standard construct) allows defining graph views over relation...
## Overview This is a single-message bug-report/patch proposal from Lakshmi addressing a misleading log message in PostgreSQL's **logical replication slot synchronization** subsystem — specifically i...
## What's New A single brief reply from **Daniel Gustafsson** (committer, and — as his self-deprecating "not sure how I could have missed that" implies — the original author of the buggy code, likely...
# Early Pruning for GRAPH_TABLE Path Generation (SQL/PGQ) ## Architectural Context SQL/PGQ (SQL Property Graph Queries), landed as a feature in PostgreSQL's SQL-standard graph query surface, is impl...
## Thread Overview: 2026-05-14 Release Announcement Draft This thread is an **administrative/release-management thread**, not a technical design discussion. Jonathan Katz, acting in his long-standing...
## Round 2: v2 patch posted, Alvaro joins with a micro-optimization Two substantive developments since the prior round: ### 1. Author (Evan Li) responds to Reshke and ships v2 - **On CFI**: Li conc...
No substantive technical progress.
# Ternary Reloption Type: Consolidating the "unset" Semantics ## The Architectural Problem PostgreSQL's reloption subsystem historically provided a small set of primitive types: `bool`, `int`, `real...
No substantive technical progress.
## New in this round (single message from Zsolt Parragi, 2026-05-08) Zsolt signs off on the NULL-handling fix ("new NULL handling looks good. Nice test!") — closing out correctness pitfall #3 from th...
# Analysis: "apt files missing for PG18" — Packaging/Infrastructure Report ## Nature of the Thread This is **not a pgsql-hackers technical development thread** in the traditional sense. It is a sing...
## New and Significant: Bug Scope Narrowed to v18 Regression The only substantive new information in this round is Richard Guo's post-commit clarification about the **historical scope** of the bug, w...
## New Discussion: Scope Creep Proposals and Pushback Five new messages introduce two tangential cleanup proposals on top of the already-approved `EndCopyFrom()` fix. Both are ultimately rejected as ...
No substantive technical progress.
## Thread Analysis: Disabling Heap-Only Tuples / `local_update_limit` / `COMPACT` ### The Architectural Problem PostgreSQL's HOT (Heap-Only Tuple) optimization is a cornerstone of MVCC update perfor...