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https://issues.apache.org/jira/browse/CALCITE-2794?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17144430#comment-17144430
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Julian Hyde commented on CALCITE-2794:
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Can you give examples of the desired SQL?
> Add specific translation for SUBSTRING, CHARACTER, CHARACTER_LENGTH,
> TRUNCATE, TRIM, DATE + INTERVAL, EXTRACT operators in Hive and BigQuery and
> Spark SQL dialects
> -------------------------------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: CALCITE-2794
> URL: https://issues.apache.org/jira/browse/CALCITE-2794
> Project: Calcite
> Issue Type: Improvement
> Components: core
> Reporter: Stuti Gupta
> Priority: Minor
>
> Owing to the syntactical differences between Calcite SQL and certain other
> Dialects, emulation for SqlNode unparsing needs to be added based on the
> Dialect in RelToSqlConcverter.
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