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https://issues.apache.org/jira/browse/CALCITE-6932?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17939756#comment-17939756
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Guillaume Massé commented on CALCITE-6932:
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ah ok you are refering to the test case in RelToSql, indeed for ANSI sql it
should throw an exception, since it's invalid. I'm using a custom dialect for
snowflake, so in my particular case it's not a problem. I think it should not
be the concern of this function, if we can't unparse, an exception should be
throw later, for some dialects, like snowflake it's valid.
> SqlTypeUtil.convertTypeToSpec discard isNullable
> ------------------------------------------------
>
> Key: CALCITE-6932
> URL: https://issues.apache.org/jira/browse/CALCITE-6932
> Project: Calcite
> Issue Type: Bug
> Reporter: Guillaume Massé
> Priority: Minor
> Labels: pull-request-available
>
> I'm writing unparse of an Array for Snowflake and I need to access the
> nullability of SqlDataTypeSpec
> [https://docs.snowflake.com/en/sql-reference/data-types-structured#specifying-a-structured-array-type]
> I was using org.apache.calcite.sql.type.SqlTypeUtil.convertTypeToSpec and
> noticed it's not using type.isNullable()
>
>
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