Changelog

[2.4.0]

Our name and version are now in pg_get_loaded_modules() for PostgreSQL 18+
Support for EXEC_BACKEND builds (PG-2547)
Add PostgreSQL 19 support (PG-2424): add generic and custom plan counts, support property graphs, use ComputeConstantLengths API for constants squashing
Backport test cases from pg_stat_statements

Both username and datname are now empty if we cannot get real values (PG-1459)
Save username and application_name before executing commands (PG-2281, PG-2557)
Add STABLE, LEAKPROOF and PARALLEL SAFE to functions
Set unit for pg_stat_monitor.pgsm_query_max_len to bytes
Do not leave the pgsm_create_view() function after running CREATE EXTENSION
Specifying USE_PGXS is no longer necessary when building with make
Deprecate the pgsm_track_application_names parameter, application name now tracked always (PG-2602)
Show NULL instead of 'unknown' when application_name is not set

Fix memory leak by scoping local memory context to the current transaction (PG-2229)
Confusion of local_blk_read_time and local_blk_write_time where writes were recorded in both fields
Performance bug when saving application_name
Off-by-one bug in comment extraction (PG-2485)
Potential buffer overflow with deeply nested queries (PG-2511)
Potential buffer overread in comment extraction (PG-2540)
Do not access PlannedStmt after we call standard_ProcessUtility() (PG-2486)
Various improvements to the stability of our test suite
Make sure that for prepared statements utility statement exec info read at the executor start hook, where data is not yet modified by query itself
Do not acquire LWLock under spinlock
Race condition where we could leak memory for the parent query
plans now counts only actual planner invocations instead of every execution: utility statements and executions that reuse a cached plan no longer bump the counter
Normalize the query text of utility statements (PG-2623)
Hide sensitive data for users who has no privileges (PG-2624)
Fix buffer overflow in query normalization (PG-2735)

PostgreSQL 18 support (PG-1907)
- Columns to track parallel worker activity
- Add tracking of wal_buffers_full
- Support constant lists squashing in query jumbling

Fix returned vaules from C function (PG-1931)
Reduce memory usage by deleteing unnecessary entires from the query stack (PG-2005)
Fix crash due to unitialized values on the query string stack (PG-2014)