20.39. Release 0.210
Fix planning failure when aliasing columns of tables containing hidden columns (#11385).
Fix correctness issue when
GROUP BY DISTINCTterms contain references to the same column using different syntactic forms (#11120).
Fix failures when querying
information_schematables using capitalized names.
Improve performance when converting between
Remove user CPU time tracking as introduces non-trivial overhead.
Select join distribution type automatically for queries involving outer joins.
Hive Connector Changes
Fix a security bug introduced in 0.209 when using
hive.security=file, which would allow any user to create, drop, or rename schemas.
Prevent ORC writer from writing stripes larger than the max configured size when converting a highly dictionary compressed column to direct encoding.
Support creating Avro tables with a custom schema using the
Support backward compatible Avro schema evolution.
Support cross-realm Kerberos authentication for HDFS and Hive Metastore.
JDBC Driver Changes
Deallocate prepared statement when
PreparedStatementis closed. Previously,
Connectionbecame unusable after many prepared statements were created.
SystemAccessControl.checkCanSetUser()now takes an
Optional<Principal>rather than a nullable
These are backwards incompatible changes with the previous SPI. If you have written a plugin, you will need to update your code before deploying this release.