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Jason Altekruse resolved DRILL-4163. ------------------------------------ Resolution: Fixed Fix Version/s: 1.5.0 Fixed in cc9175c13270660ffd9ec2ddcbc70780dd72dada > Support schema changes for MergeJoin operator. > ---------------------------------------------- > > Key: DRILL-4163 > URL: https://issues.apache.org/jira/browse/DRILL-4163 > Project: Apache Drill > Issue Type: Improvement > Reporter: amit hadke > Assignee: Jason Altekruse > Fix For: 1.5.0 > > > Since external sort operator supports schema changes, allow use of union > types in merge join to support for schema changes. > For now, we assume that merge join always works on record batches from sort > operator. Thus merging schemas and promoting to union vectors is already > taken care by sort operator. > Test Cases: > 1) Only one side changes schema (join on union type and primitive type) > 2) Both sids change schema on all columns. > 3) Join between numeric types and string types. > 4) Missing columns - each batch has different columns. -- This message was sent by Atlassian JIRA (v6.3.4#6332)