Release 417 (10 May 2023)#
General#
Improve performance of
UNION ALL
queries. (#17265)
Delta Lake connector#
Add support for
COMMENT ON VIEW
. (#17089)Improve performance when reading Parquet data written by Trino. (#17373, #17404)
Improve read performance for tables with
row
columns when only a subset of fields is needed for a query. (#17085)
Hive connector#
Add support for specifying arbitrary table properties via the
extra_properties
table property. (#954)Improve performance when reading Parquet data written by Trino. (#17373, #17404)
Improve performance when reading text files that contain more columns in the file than are mapped in the schema. (#17364)
Limit file listing cache based on in-memory size instead of number of entries. This is configured via the
hive.file-status-cache.max-retained-size
andhive.per-transaction-file-status-cache.max-retained-size
configuration properties. Thehive.per-transaction-file-status-cache-maximum-size
andhive.file-status-cache-size
configuration properties are deprecated. (#17285)