[HIVE-12645] ConstantPropagateProcCtx.resolve() should verify internal names in addition to alias to match 2 columns from different row schemas

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.0.0
• Assignee: Hari Sankar Sivarama Subramaniyan
• Reporter: Hari Sankar Sivarama Subramaniyan
• Created: 10/Dec/15 19:21
• Updated: 16/Feb/16 23:51
• Resolved: 11/Jan/16 22:39

Description

Currently, it seems that we look to match the ColumnInfo between the parent and the child rowschemas by calling rci = rs.getColumnInfo(tblAlias, alias) which might be a bit aggressive. i.e. we will lose opportunity to constant propogate even if the columns are the same but the alias in the rowschemas do not match. We need to introduce additional checks to see if the columns can be mapped to constants from parents.

Issue Links

• is related to: HIVE-12866 Allow ReduceSinkDeDuplication to kick in when there are constant keys
• links to: Reviewboard