20.75. Release 0.174
Fix correctness issue for correlated subqueries containing a
Fix a memory leak in the coordinator that causes long-running queries in highly loaded clusters to consume unnecessary memory.
Improve performance of aggregate window functions.
Improve parallelism of queries involving
Improve parallelism of
Filter and projection operations are now always processed columnar if possible, and Presto will automatically take advantage of dictionary encodings where effective. The
processing_optimizationsession property and
optimizer.processing-optimizationconfiguration option have been removed.
Add support for escaped unicode sequences in string literals.
Add SHOW GRANTS and
Change default value of
hive.metastore-refresh-intervalto 0 to disable cross-transaction metadata caching.
Web UI changes
Fix ES6 compatibility issue with older browsers.
Display buffered bytes for every stage in the live plan UI.