📝 Changelog entry for TimescaleDB 2.27.1 (staged for week of June 1)

[brandonpurcell-dev]

Describe your changes

Stages the TimescaleDB 2.27.1 changelog entry for the cloud rollout the week of June 1, 2026. Currently dated 2026-06-01; update if the actual cloud date shifts within the week.

This PR is stacked on top of #289 (2.27.0 changelog). Once #289 merges to main, retarget this PR's base from changelog/timescaledb-2.27.0 → main and the diff will collapse to just the 2.27.1 entry.

What's in the 2.27.1 entry

• Tightened access controls (3 fixes): hypertable ownership before recompression (#9800), job_errors view restricted to owners (#9799), policy_reorder_remove ownership check (#9801).
• Columnstore planner corrections (2 fixes): skip ColumnarIndexScan for GROUPING SETS / ROLLUP / CUBE (#9830) and when grouping by expression (#9828).
• Upgrade compatibility (2 items): orphaned compression_settings cleanup during migration (#9795), composite bloom filter migration scripts (#9824).

TimescaleDB 2.27.1 was released on GitHub on May 19, 2026.

Pre-merge checklist

• Confirm exact cloud rollout date (currently 2026-06-01)
• Security team review on framing of the three access-control fixes
• 📝 Changelog entry for TimescaleDB 2.27.0 #289 (2.27.0 entry) is merged
• PR base retargeted from changelog/timescaledb-2.27.0 → main
• Convert from draft → ready for review

Affected pages

• /get-started/news/new

Related Issues

Issue: #

Checklist before requesting a review

• - This is ready for review. If not, raise as a draft PR
• - I have reviewed my changes.
• - I have confirmed the content is technically accurate.
• - I have tested any code that is added or updated on the latest available version.
• - I have confirmed the content is free of typos or grammar errors.
• - I have verified all images and videos are clear and match production (or dev for unreleased features).
• - This references a feature that is public. If not, add a note and we can schedule the merge for after the feature release.

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Project	Deployment	Actions	Updated (UTC)
tiger-data-docs	Ready	Preview, Comment	May 26, 2026 9:19pm