jon-wei opened a new issue #9327: Exception when one RHS column is joined to two different columns URL: https://github.com/apache/druid/issues/9327 If a join query has an equicondition where one RHS column is joined to two different columns, e.g. ``` r1.regionIsoCode == regionIsoCode && r1.regionIsoCode == countryIsoCode ``` The `Equality` object for one of the conditions will currently have a `rightColumn` identifier where an extra `_0` suffix is appended to the rhs column name (`regionIsoCode_0` in this example), causing the query to fail with an error like: ``` Cannot build hash-join matcher on non-key-based condition: Equality{leftExpr=countryIsoCode, rightColumn='regionIsoCode_0` ```
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