[jira] [Updated] (SPARK-24125) Add quoting rules to SQL guide

["Dongjoon Hyun (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-24125?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Dongjoon Hyun updated SPARK-24125:
----------------------------------
    Component/s:     (was: SQL)
                 Documentation

> Add quoting rules to SQL guide
> ------------------------------
>
>                 Key: SPARK-24125
>                 URL: https://issues.apache.org/jira/browse/SPARK-24125
>             Project: Spark
>          Issue Type: Improvement
>          Components: Documentation
>    Affects Versions: 2.4.0
>            Reporter: Henry Robinson
>            Priority: Minor
>
> As far as I can tell, Spark SQL's quoting rules are as follows:
> * {{`foo bar`}} is an identifier
> * {{'foo bar'}} is a string literal
> * {{"foo bar"}} is a string literal
> The last of these is non-standard (usually {{"foo bar"}} is an identifier), and so it's probably worth mentioning these rules in the 'reference' section of the [SQL guide|http://spark.apache.org/docs/latest/sql-programming-guide.html#reference].
> I'm assuming there's not a lot of enthusiasm to change the quoting rules, given it would be a breaking change, and that backticks work just fine as an alternative. 



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