Jesus Camacho Rodriguez created HIVE-23162:
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Summary: Remove swapping logic to merge joins in AST converter
Key: HIVE-23162
URL: https://issues.apache.org/jira/browse/HIVE-23162
Project: Hive
Issue Type: Bug
Components: CBO
Reporter: Jesus Camacho Rodriguez
Assignee: Jesus Camacho Rodriguez
In ASTConverter, there is some logic to invert join inputs so the logic to
merge joins in SemanticAnalyzer kicks in.
https://github.com/apache/hive/blob/master/ql/src/java/org/apache/hadoop/hive/ql/optimizer/calcite/translator/ASTConverter.java#L407
There is a bug because inputs are swapped but the schema is not. However, it
turns out that logic is not needed now that merging is off by default.
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