[GitHub] [drill] vvysotskyi opened a new pull request #1686: DRILL-6524: Prevent incorrect scalar replacement for the case of assigning references inside if block

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

vvysotskyi opened a new pull request #1686: DRILL-6524: Prevent incorrect scalar replacement for the case of assigning references inside if block
URL: https://github.com/apache/drill/pull/1686
 
 
   This pull request contains two commits:
   - The first one contains changes to prevent incorrect scalar replacement for the case of assigning references inside if block to avoid wrong results for some cases
   - The second commit contains changes to assign holder fields inside of assigning just object reference for the case when the source object is not used anymore (a common example is the result of UDF execution), so it will allow using scalar replacement more frequently.
   
   Therefore with these two commits, a scalar replacement will be produced correctly and more frequently despite preventing it in the first commit.
   
   For detailed problem description please see comment in [DRILL-6524](https://issues.apache.org/jira/browse/DRILL-6524)

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