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Posted to issues@spark.apache.org by "Apache Spark (JIRA)" <ji...@apache.org> on 2019/06/05 01:54:00 UTC

[jira] [Assigned] (SPARK-27949) Support ANSI SQL grammar `substring(string_expression from n1 [for n2])`

     [ https://issues.apache.org/jira/browse/SPARK-27949?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Apache Spark reassigned SPARK-27949:
------------------------------------

    Assignee:     (was: Apache Spark)

> Support ANSI SQL grammar `substring(string_expression from n1 [for n2])`
> ------------------------------------------------------------------------
>
>                 Key: SPARK-27949
>                 URL: https://issues.apache.org/jira/browse/SPARK-27949
>             Project: Spark
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 3.1.0
>            Reporter: Zhu, Lipeng
>            Priority: Major
>
> Currently, function substr/substring's usage is like substring(string_expression, n1 [,n2]). 
> But the ANSI SQL defined the pattern for substr/substring is like substring(string_expression from n1 [for n2]). This gap make some inconvenient when we switch to the SparkSQL.
> Can we support the ANSI pattern like substring(string_expression from n1 [for n2])?
>  
> [http://www.contrib.andrew.cmu.edu/~shadow/sql/sql1992.txt]



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