18.69. Release 0.88
General Changes
- Added 
arbitrary() aggregation function. 
- Allow using all Aggregate Functions as Window Functions.
 
- Support specifying window frames and correctly implement frames for all Window Functions.
 
- Allow 
approx_distinct() aggregation function to accept a standard error parameter. 
- Implement 
least() and greatest() with variable number of arguments. 
- ARRAY is now comparable and can be used as 
GROUP BY keys or in ORDER BY expressions. 
- Implement 
= and <> operators for ROW. 
- Fix excessive garbage creation in the ORC reader.
 
- Fix an issue that could cause queries using 
row_number() and LIMIT to never terminate. 
- Fix an issue that could cause queries with 
row_number() and specific filters to produce incorrect results. 
- Fixed an issue that caused the Cassandra plugin to fail to load with a SecurityException.