Release Notes for v26.1-v26.1.2 (#23150)

* Update release notes for v26.1-v26.1.2

* Update release notes for v26.1-v26.1.2

* Update release notes for v26.1-v26.1.2

* Update release notes for v26.1-v26.1.2

* Update release notes for v26.1-v26.1.2

* Update release notes for v26.1-v26.1.2

* Update release notes for v26.1-v26.1.2

* Update release notes for v26.1-v26.1.2

* Update release notes for v26.1-v26.1.2

* Apply suggestion from @mikeCRL

---------

Co-authored-by: Automated Release Bot <releasebot@cockroachlabs.com>
Co-authored-by: Mike Lewis <76072290+mikeCRL@users.noreply.github.com>
Co-authored-by: Ryan Kuo <ryank@cockroachlabs.com>

Author: 4 people

src/current/_data/releases.yml

@@ -11081,3 +11081,38 @@
       CockroachDB Cloud clusters. To request to upgrade
       a CockroachDB self-hosted cluster to this version,
       [contact support](https://support.cockroachlabs.com/hc/requests/new).
+
+
+- release_name: v26.1.2
+  major_version: v26.1
+  release_date: '2026-04-03'
+  release_type: Production
+  go_version: go1.25.5
+  sha: 124a168e515e99109d857fccf020804adebbc0c0
+  has_sql_only: true
+  has_sha256sum: true
+  mac:
+    mac_arm: true
+    mac_arm_experimental: true
+    mac_arm_limited_access: false
+  windows: true
+  linux:
+    linux_arm: true
+    linux_arm_experimental: false
+    linux_arm_limited_access: false
+    linux_intel_fips: true
+    linux_arm_fips: false
+  docker:
+    docker_image: cockroachdb/cockroach
+    docker_arm: true
+    docker_arm_experimental: false
+    docker_arm_limited_access: false
+  source: true
+  previous_release: v26.1.1
+  cloud_only: true
+  cloud_only_message_short: 'Available only for select CockroachDB Cloud clusters'
+  cloud_only_message: >
+      This version is currently available only for select
+      CockroachDB Cloud clusters. To request to upgrade
+      a CockroachDB self-hosted cluster to this version,
+      [contact support](https://support.cockroachlabs.com/hc/requests/new).

src/current/_includes/releases/v26.1/v26.1.2.md

@@ -0,0 +1,33 @@
+## v26.1.2
+
+Release Date: April 3, 2026
+
+{% include releases/new-release-downloads-docker-image.md release=include.release %}
+
+<h3 id="v26-1-2-command-line-changes">Command-line changes</h3>
+
+- The `cockroach debug zip` command's `--include-files` and `--exclude-files` flags now support full zip path patterns. Patterns containing `/` are matched against the full path within the zip archive (e.g., `--include-files='debug/nodes/1/*.json'`). Patterns without `/` continue to match the base file name as before. [#164146][#164146]
+
+<h3 id="v26-1-2-bug-fixes">Bug fixes</h3>
+
+- Fixed a bug where contention events reported the wrong key. Previously, the key field in contention events showed the transaction's anchor key (used for record placement) rather than the actual key where the conflict occurred. This made it difficult to diagnose contention issues accurately. [#164157][#164157]
+- Fixed a bug where `CREATE INDEX` on a table with `PARTITION ALL BY` would fail if the partition columns were explicitly included in the primary key definition. [#164754][#164754]
+- Fixed a bug that prevented the `optimizer_min_row_count` setting from applying to anti-join expressions, which could lead to bad query plans. The fix is gated behind `optimizer_use_min_row_count_anti_join_fix`, which is on by default on v26.2 and later, and off by default in earlier versions. [#164798][#164798]
+- Fixed a bug where CockroachDB did not always promptly respond to the statement timeout when performing a hash join with an `ON` filter that is mostly `false`. [#164891][#164891]
+- Fixed a bug introduced in v25.4 where setting `min_checkpoint_frequency` to `0` prevented changefeeds from advancing their resolved timestamp (high-water mark) and emitting resolved messages. Note that setting `min_checkpoint_frequency` lower than `500ms` is not recommended as it may cause degraded changefeed performance. [#164892][#164892]
+- Lowered the default value of the `changefeed.max_retry_backoff` cluster setting from `10m` to `30s` to reduce changefeed lag during rolling restarts. [#164936][#164936]
+- Fixed a rare race condition where `SHOW CREATE TABLE` could fail with a `"relation does not exist"` error if a table referenced by a foreign key was being concurrently dropped. [#165274][#165274]
+- Fixed a bug that could cause row sampling for table statistics to crash a node due to a data race when processing a collated string column with values larger than 400 bytes. This bug has existed since before v23.1. [#165562][#165562]
+- Fixed a bug in the legacy schema changer where rolling back a `CREATE TABLE` with inline `FOREIGN KEY` constraints could leave orphaned foreign key back-references on the referenced table, causing descriptor validation errors. [#165994][#165994]
+- Fixed a bug where restoring a database backup containing default privileges that referenced non-existent users would leave dangling user references in the restored database descriptor. [#166226][#166226]
+[#164754]: https://github.com/cockroachdb/cockroach/pull/164754
+[#164892]: https://github.com/cockroachdb/cockroach/pull/164892
+[#165562]: https://github.com/cockroachdb/cockroach/pull/165562
+[#166226]: https://github.com/cockroachdb/cockroach/pull/166226
+[#164936]: https://github.com/cockroachdb/cockroach/pull/164936
+[#165274]: https://github.com/cockroachdb/cockroach/pull/165274
+[#165994]: https://github.com/cockroachdb/cockroach/pull/165994
+[#164146]: https://github.com/cockroachdb/cockroach/pull/164146
+[#164157]: https://github.com/cockroachdb/cockroach/pull/164157
+[#164798]: https://github.com/cockroachdb/cockroach/pull/164798
+[#164891]: https://github.com/cockroachdb/cockroach/pull/164891