[jira] [Assigned] (CALCITE-4394) When generating code for a function call, take the inferred operand type into account

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

     [ https://issues.apache.org/jira/browse/CALCITE-4394?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Julian Hyde reassigned CALCITE-4394:
------------------------------------

    Assignee: Julian Hyde

> When generating code for a function call, take the inferred operand type into account
> -------------------------------------------------------------------------------------
>
>                 Key: CALCITE-4394
>                 URL: https://issues.apache.org/jira/browse/CALCITE-4394
>             Project: Calcite
>          Issue Type: Bug
>            Reporter: Julian Hyde
>            Assignee: Julian Hyde
>            Priority: Major
>
> When generating code for a function call, take the inferred operand type into account. If we don't do this, the Java code we generate for {{CONCAT(CAST(NULL AS ANY), 'x')}} does not compile, because the first parameter is of type Object; it needs to be String (based on the inferred operand type of VARCHAR).
> We achieve this by using {{SqlOperator.operandTypeInference}} at validate time, storing the list of inferred operand types for the call, then using that list (if available) during code generation.



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