[GitHub] [incubator-pinot] mayankshriv commented on issue #4230: NULL value support for all data types

[GitBox <gi...@apache.org>]

mayankshriv commented on issue #4230: NULL value support for all data types
URL: https://github.com/apache/incubator-pinot/issues/4230#issuecomment-497012617
 
 
   A few questions:
   1. How do we return NULL in response for selection queries?
   2. If we don't change what is stored in the fwd index, where/how to tie the default null value stored in the fwd index with the NULL keyword in (x != NULL) specified in the query? For new indices (generated after this feature is implemented), is there any value of supporting default null value?
   3. How will presence vector work for MV columns, where one of the MV values is NULL?
   4. From the proposal I take it that the idea is to filter out NULLs during filtering phase of query execution? What about the case where filtered columns don't have NULL, but the column being aggregated has NULL. When/where will these NULLs be filtered so that individual aggregation functions don't need to filter them out explicitly?

----------------------------------------------------------------
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
 
For queries about this service, please contact Infrastructure at:
users@infra.apache.org


With regards,
Apache Git Services

---------------------------------------------------------------------
To unsubscribe, e-mail: commits-unsubscribe@pinot.apache.org
For additional commands, e-mail: commits-help@pinot.apache.org