tricolor2 opened a new pull request #440: PHOENIX-4311: Unnest Support
URL: https://github.com/apache/phoenix/pull/440
 
 
   I have started the implementation of the UNNEST function support. I've 
implemented similarly to Postgresql. So far I can perform a select, 
aggregations, use limit, upsert using it. 
   
   My next step is to implement the Where compiler to create a post-filter for 
the UNNESTED column but I need your feed back on what is implemented so far 
before doing so.
   
   Missing components are:
   - WHERE compiler
   - JOIN support
   
   Improvements:
   - Add to the explain plan the UNNEST columns
   - Add the post-unnest filter information to the plan when the where will be 
implemented
   - Return a ProjectedColumnExpression column instead of 
KeyValueColumnExpression to save bandwidth
   
   Best regards,

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