apilloud commented on pull request #16911:
URL: https://github.com/apache/beam/pull/16911#issuecomment-1078480456


   It looks like you are failing in this line of code: 
https://github.com/apache/beam/blob/77e924fd5a025326b50352c29598ea1eb48d385a/sdks/java/extensions/sql/zetasql/src/main/java/org/apache/beam/sdk/extensions/sql/zetasql/translation/ExpressionConverter.java#L213
   
   What this means is something in a previous step was converted from ZetaSQL 
to Calcite wrong. There is a ZetaSQL ResolvedProjectScan that references the 
forth column (index 3) but the calcite List<RelDataTypeField> only has three 
columns.
   
   You might be able to add some asserts earlier in the conversion to help you 
find the issue.


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