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https://issues.apache.org/jira/browse/CALCITE-6932?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17939753#comment-17939753
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Mihai Budiu commented on CALCITE-6932:
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This SQL that you generate MAP< VARCHAR CHARACTER SET \"ISO-8859-1\", INTEGER
ARRAY NULL > cannot be parsed back.
> 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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