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https://issues.apache.org/jira/browse/FLINK-10103?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Xingcan Cui closed FLINK-10103.
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Resolution: Duplicate
> Refine built-in-functions docs for SQL
> --------------------------------------
>
> Key: FLINK-10103
> URL: https://issues.apache.org/jira/browse/FLINK-10103
> Project: Flink
> Issue Type: Improvement
> Components: Table API & SQL
> Reporter: Hequn Cheng
> Priority: Minor
>
> We should use {{'}} instead of {{"}} to express string in SQL. For example,
> we should write E.g. CONCAT('AA', 'BB', 'CC') instead of E.g. CONCAT("AA",
> "BB", "CC").
> There are other places also need to be corrected for SQL Built-In Functions.
> https://ci.apache.org/projects/flink/flink-docs-master/dev/table/sql.html#built-in-functions
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