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https://issues.apache.org/jira/browse/SPARK-31562?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17092128#comment-17092128
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Takeshi Yamamuro commented on SPARK-31562:
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I'm working on https://github.com/apache/spark/pull/28342
> Update ExpressionDescription for substring, current_date, and
> current_timestamp
> -------------------------------------------------------------------------------
>
> Key: SPARK-31562
> URL: https://issues.apache.org/jira/browse/SPARK-31562
> Project: Spark
> Issue Type: Improvement
> Components: Documentation, SQL
> Affects Versions: 3.0.0
> Reporter: Takeshi Yamamuro
> Priority: Major
>
> This jira intends to add entries for substring, current_date, and
> current_timestamp in the SQL built-in function documents. Specifically, the
> entries are as follows;
> SELECT current_date;
> SELECT current_timestamp;
> SELECT substring('abcd' FROM 1);
> SELECT substring('abcd' FROM 1 FOR 2);
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