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From "Josh Rosen (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (SPARK-4151) Add string operation function trim, ltrim, rtrim, length to support SparkSql (HiveQL)
Date Tue, 16 Dec 2014 00:25:14 GMT

     [ https://issues.apache.org/jira/browse/SPARK-4151?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Josh Rosen updated SPARK-4151:
------------------------------
    Target Version/s: 1.1.2  (was: 1.1.0)
       Fix Version/s:     (was: 1.1.2)
                          (was: 1.1.0)

Removing the "Fix Version/s" field, since we only use that to indicate where fixes have been
applied, not where we plan to apply them; moved those versions over to "Target Version/s"
instead.

> Add string operation function trim, ltrim, rtrim, length to support SparkSql (HiveQL)

> --------------------------------------------------------------------------------------
>
>                 Key: SPARK-4151
>                 URL: https://issues.apache.org/jira/browse/SPARK-4151
>             Project: Spark
>          Issue Type: Improvement
>          Components: SQL
>    Affects Versions: 1.1.0
>            Reporter: shengli
>            Priority: Minor
>   Original Estimate: 72h
>  Remaining Estimate: 72h
>
> Add three string operation functions to support spark sql and hiveql.
> eg:
> sql("select trim(' a b ') from src ").collect() --> 'a b'
> sql("select ltrim(' a b ') from src ").collect() --> 'a b ' 
> sql("select rtrim(' a b ') from src ").collect() --> ' a b'
> sql("select length('ab') from src ").collect() --> 2
> And Rename the trait of stringOperations.scala.
> I prefer to rename trait CaseConversionExpression to StringTransformationExpression,
it is more make sence than before so that this trait can support more string transformation
but not only caseconversion.
> And also add a trait StringCalculationExpression that do string computation like length,
indexof etc....



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