Release 0.74#
Bytecode compiler#
This version includes new infrastructure for bytecode compilation, and lays the groundwork for future improvements.
There should be no impact in performance or correctness with the new code, but we have added a flag to revert to the
old implementation in case of issues. To do so, add compiler.new-bytecode-generator-enabled=false
to
etc/config.properties
in the coordinator and workers.
Hive storage format#
The storage format to use when writing data to Hive can now be configured via the hive.storage-format
option
in your Hive catalog properties file. Valid options are RCBINARY
, RCTEXT
, SEQUENCEFILE
and TEXTFILE
.
The default format if the property is not set is RCBINARY
.
General#
Show column comments in
DESCRIBE
Add
try_cast()
which works likecast()
but returnsnull
if the cast failsnullif
now correctly returns a value with the type of the first argumentFix an issue with
timezone_hour()
returning results in milliseconds instead of hoursShow a proper error message when analyzing queries with non-equijoin clauses
Improve “too many failures” error message when coordinator can’t talk to workers
Minor optimization of
json_size()
functionImprove feature normalization algorithm for machine learning functions
Add exponential back-off to the S3 FileSystem retry logic
Improve CPU efficiency of semi-joins