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https://issues.apache.org/jira/browse/CALCITE-4001?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17107571#comment-17107571
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Julian Hyde commented on CALCITE-4001:
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Are you aware of the work done in CALCITE-3534, adding
{{SqlAlienSystemTypeNameSpec}}?
> Should support dialect when unparsing SqlDataTypeSpec
> -----------------------------------------------------
>
> Key: CALCITE-4001
> URL: https://issues.apache.org/jira/browse/CALCITE-4001
> Project: Calcite
> Issue Type: Improvement
> Components: core
> Reporter: Xurenhe
> Priority: Minor
>
> SqlBasicTypeNameSpec cannot cover all data types of other sql's engine, when
> doing SqlNode To SqlString,
> such as cast(id as bigint), but some sql-engine only support cast(id as long).
> I think there should be based on dialect, just like
> org.apache.calcite.sql.SqlDialect#unparseOffsetFetch.
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