[jira] [Commented] (CALCITE-2468) Validator throws IndexOutOfBoundsException when trying to infer operand type from struct return type

["Julian Hyde (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CALCITE-2468?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16586722#comment-16586722 ] 

Julian Hyde commented on CALCITE-2468:
--------------------------------------

I wonder whether RelStructuredTypeFlattener is to blame. Although the stack trace in the Flink case indicates that it's still in the validator and has probably not got to RelStructuredTypeFlattener yet.

> Validator throws IndexOutOfBoundsException when trying to infer operand type from struct return type
> ----------------------------------------------------------------------------------------------------
>
>                 Key: CALCITE-2468
>                 URL: https://issues.apache.org/jira/browse/CALCITE-2468
>             Project: Calcite
>          Issue Type: Bug
>          Components: core
>    Affects Versions: 1.17.0
>            Reporter: Rong Rong
>            Assignee: Julian Hyde
>            Priority: Major
>
> IOOBE was thrown when trying to acquire {{SqlOperandTypeInference}} using {{RETURN_TYPE}} at:
> https://github.com/apache/calcite/blob/branch-1.17/core/src/main/java/org/apache/calcite/sql/type/InferTypes.java#L68
> The follow SQLs demonstrates how to trigger the exception over a simple Schema:
> {code:yaml}
> - table1:
>   - structType1:
>     - intField
>   - structType2:
>     - intField
>     - bigintField
> {code}
> - Exception SQL:
> {code:sql}
> SELECT structType1 AS myStructType FROM table1
> {code}
> - Correct SQL:
> {code:sql}
> SELECT structType1 FROM table1
> {code}
> {code:sql}
> SELECT structType2 AS myStructType FROM table1
> {code}
> E2E example can be found in:
> https://github.com/apache/calcite/commit/d5fb1f9fc5d3f9583128d9ee35c4a23e8470d54d



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