[jira] [Closed] (CALCITE-5635) Consult type mappings when coercing types.

["Will Noble (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CALCITE-5635?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Will Noble closed CALCITE-5635.
-------------------------------
    Resolution: Duplicate

> Consult type mappings when coercing types.
> ------------------------------------------
>
>                 Key: CALCITE-5635
>                 URL: https://issues.apache.org/jira/browse/CALCITE-5635
>             Project: Calcite
>          Issue Type: Improvement
>          Components: core
>            Reporter: Will Noble
>            Priority: Major
>
> This is another offshoot of CALCITE-5346.
> In [{{AbstractTypeCoercion.implicitCast}}|https://github.com/apache/calcite/blob/2dba40e7a0a5651eac5a30d9e0a72f178bd9bff2/core/src/main/java/org/apache/calcite/sql/validate/implicit/AbstractTypeCoercion.java#L713], Calcite may insert {{CAST}} invocations disregarding the root schema type map. This happens during the validation phase, so it's easy enough to read the type map directly in the {{AbstractTypeCoercion}} utility, although it's hard to say if this is an optimal solution. It may make sense to incorporate the type map into the {{RelDataTypeSystem}} which is more widely available in non-validation phases of SQL processing pipelines.



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