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Posted to issues@spark.apache.org by "Dongjoon Hyun (JIRA)" <ji...@apache.org> on 2019/06/10 07:08:00 UTC
[jira] [Updated] (SPARK-27949) Support SUBSTRING(str FROM n1 [FOR
n2]) syntax
[ https://issues.apache.org/jira/browse/SPARK-27949?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Dongjoon Hyun updated SPARK-27949:
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Summary: Support SUBSTRING(str FROM n1 [FOR n2]) syntax (was: Support ANSI SQL grammar `substring(string_expression from n1 [for n2])`)
> Support SUBSTRING(str FROM n1 [FOR n2]) syntax
> ----------------------------------------------
>
> Key: SPARK-27949
> URL: https://issues.apache.org/jira/browse/SPARK-27949
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Affects Versions: 3.0.0
> Reporter: Zhu, Lipeng
> Priority: Minor
>
> 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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