add 9697

Author: surister

.unreleased/pr_9743

@@ -14,7 +14,7 @@ This release contains performance improvements and bug fixes since the 2.26.4 re
 * `UPDATE` and `DELETE` statements with equality predicates can now use bloom filters to skip decompressing batches whose compressed rows can't match. When multiple bloom filters apply, they are evaluated in decreasing order of column count (most selective first), and EXPLAIN now reports filtering activity via the new "Compressed batches filtered" and "Batches filtered after decompression counters". The query performance increases in some case up to 160 times.
 * `UPSERT` queries can now leverage bloom filters (including composite ones) to skip decompressing batches when the arbiter values are guaranteed not to be present, with the most-selective filter chosen automatically when multiple apply. EXPLAIN output adds new statistics — batches checked by bloom, batches pruned by bloom, batches without bloom, and bloom false positives — for visibility into pruning effectiveness.
 
-**Upcoming PostgreSQL 15 EOL announcement** 
+**Upcoming PostgreSQL 15 EOL announcement**
 As a reminder, the upcoming TimescaleDB release in June 2026 will officially be the last version with support for PostgreSQL 15. This deprecation was initially announced in the [v2.23.0 changelog](https://github.com/timescale/timescaledb/releases/tag/2.23.0) on October 29, 2025, to provide users ample time to prepare. To ensure uninterrupted access to new features, bugfixes and performance enhancements, all instances must be upgraded to PostgreSQL 16 or greater.
 
 **Backward-Incompatible Changes**
@@ -68,6 +68,8 @@ As a reminder, the upcoming TimescaleDB release in June 2026 will officially be
 * [#9710](https://github.com/timescale/timescaledb/pull/9710) Return `bigint` from `compressed_data_column_size`
 * [#9711](https://github.com/timescale/timescaledb/pull/9711) Fix registration row leak when continuous aggregate refresh fails
 * [#9697](https://github.com/timescale/timescaledb/pull/9697) Improve `pathkey` handling for compressed sub-paths during sort transformation
+* [#9743](https://github.com/timescale/timescaledb/pull/9743) Fix the composite bloom metadata column naming scheme
+
 
 **New Settings**
 * `enable_cagg_rewrites`: enables rewriting queries with CAggs. Off by default. `cagg_rewrites_debug_info`: prints CAgg rewrites diagnostics. Off by default.
@@ -76,6 +78,7 @@ As a reminder, the upcoming TimescaleDB release in June 2026 will officially be
 **Thanks**
 * @fabriziomello for adding support for `PG_MODULE_MAGIC_EXT`
 * @maltalex for reporting an issue with index creation progress reporting
+* @pavanmanishd for the first version of the fix for #9743
 
 ## 2.26.4 (2026-04-28)