[jira] [Commented] (CALCITE-3468) Oracle cast to varchar does not use precision when it should

["Danny Chen (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CALCITE-3468?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16964487#comment-16964487 ] 

Danny Chen commented on CALCITE-3468:
-------------------------------------

In OracleSqlDialect, we may need to fix the VARCHAR type with a explicit precision.

> Oracle cast to varchar does not use precision when it should
> ------------------------------------------------------------
>
>                 Key: CALCITE-3468
>                 URL: https://issues.apache.org/jira/browse/CALCITE-3468
>             Project: Calcite
>          Issue Type: Improvement
>            Reporter: Lindsey Meyer
>            Priority: Major
>
> We're trying to cast a node to a varchar with something like this:
> {noformat}
> relBuilder.cast(node, SqlTypeName.VARCHAR)
> {noformat}
> And in Oracle SQL, this generates sql like
> {noformat}
> CAST(node AS VARCHAR){noformat}
> which is incorrect. Oracle can only have VARCHAR types with an explicit precision.
> Looking at the code, it _seems_ like this should work with Oracle, so I'm not really sure what's going on here



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