Add release notes for 0.248

presto-docs/src/main/sphinx/release.rst

@@ -5,6 +5,7 @@ Release Notes
 .. toctree::
     :maxdepth: 1
 
+    release/release-0.248
     release/release-0.247
     release/release-0.246
     release/release-0.245.1

presto-docs/src/main/sphinx/release/release-0.248.rst

@@ -0,0 +1,35 @@
+=============
+Release 0.248
+=============
+
+**Highlights**
+==============
+* New aggregation function :func:`map_union_sum`.
+* Add support for overriding session properties using session property managers. See :doc:`/admin/session-property-managers`.
+
+**Details**
+===========
+
+General Changes
+_______________
+* Improve query performance by reducing lock contention in output buffer memory tracking.
+* Add support for overriding session properties using session property managers :doc:`/admin/session-property-managers`. Setting ``overrideSessionProperties`` to true will cause the property to be overridden and remain overridden even if subsequent rules match the property but don't have ``overrideSessionProperties`` set.
+* Add support to drop multiple UDFs at the same time.
+* Add a REST endpoint ``/v1/taskInfo/{{taskId}}`` on the coordinator to get TaskInfo without needing to go directly to the worker's endpoint.
+* Add new aggregation function :func:`map_union_sum`.
+* Add support to configure ZSTD compression level for ORC writer.
+* Add warning for JOIN conditions with OR expressions.
+* Add configuration property ``internal-communication.https.trust-store-password`` to set the Java Truststore password used for https in internal communications between nodes.
+
+Hive Connector Changes
+________________
+* Add session property ``temporary_table_create_empty_bucket_files`` and configuration property ``hive.create-empty-bucket-files-for-temporary-table``, which, when set to ``false``, disables the creation of zero-row files for temporary table empty buckets, to improve performance.
+
+Verifier Changes
+________________
+* Add output table names to Presto Verifier outputs.
+
+**Contributors**
+================
+
+Ajay George, Andrii Rosa, Ariel Weisberg, Arunachalam Thirupathi, Bin Fan, Chi Tsai, David Stryker, James Petty, James Sun, Ke Wang, Leiqing Cai, Luca, Lung-Yen Chen, Nikhil Collooru, Rebecca Schlussel, Rongrong Zhong, Shixuan Fan, Sreeni Viswanadha, Stephen Dimmick, Tim Meehan, Venki Korukanti, Vic Zhang, Wenlei Xie, Yang Yang