12.32. Release 0.214

General Changes

Fix history leak in coordinator for failed or canceled queries.
Fix memory leak related to query tracking in coordinator that was introduced in Release 0.213.
Fix planning failures when lambdas are used in join filter expression.
Fix responses to client for certain types of errors that are encountered during query creation.
Improve error message when an invalid comparator is provided to the array_sort() function.
Improve performance of lookup operations on map data types.
Improve planning and query performance for queries with TINYINT, SMALLINT and VARBINARY literals.
Fix issue where queries containing distributed ORDER BY and aggregation could sometimes fail to make progress when data was spilled.
Make top N row number optimization work in some cases when columns are pruned.
Add session property optimize-top-n-row-number and configuration property optimizer.optimize-top-n-row-number to toggle the top N row number optimization.
Add ngrams() function to generate N-grams from an array.
Add qdigest type and associated Quantile Digest Functions.
Add functionality to delay query execution until a minimum number of workers nodes are available. The minimum number of workers can be set with the query-manager.required-workers configuration property, and the max wait time with the query-manager.required-workers-max-wait configuration property.
Remove experimental pre-allocated memory system, and the related configuration property experimental.preallocate-memory-threshold.

Add functionality to refresh the configuration of file-based access controllers. The refresh interval can be set using the security.refresh-period configuration property.

Prevent ORC writer from writing stripes larger than the maximum configured size.
Add hive.s3.upload-acl-type configuration property to specify the type of ACL to use while uploading files to S3.
Add Hive metastore API recording tool for remote debugging purposes.
Add support for retrying on metastore connection errors.