[jira] [Commented] (SPARK-19228) inferSchema function processed csv date column as string and "dateFormat" DataSource option is ignored

["Apache Spark (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SPARK-19228?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16309509#comment-16309509 ] 

Apache Spark commented on SPARK-19228:
--------------------------------------

User 'sergey-rubtsov' has created a pull request for this issue:
https://github.com/apache/spark/pull/20140

> inferSchema function processed csv date column as string and "dateFormat" DataSource option is ignored
> ------------------------------------------------------------------------------------------------------
>
>                 Key: SPARK-19228
>                 URL: https://issues.apache.org/jira/browse/SPARK-19228
>             Project: Spark
>          Issue Type: Bug
>          Components: Input/Output, SQL
>    Affects Versions: 2.1.0
>            Reporter: Sergey Rubtsov
>              Labels: easyfix
>   Original Estimate: 6h
>  Remaining Estimate: 6h
>
> I need to process user.csv like this:
> {code}
> id,project,started,ended
> sergey.rubtsov,project0,12/12/2012,10/10/2015
> {code}
> When I add date format options:
> {code}
>         Dataset<Row> users = spark.read().format("csv").option("mode", "PERMISSIVE").option("header", "true")
>                                 .option("inferSchema", "true").option("dateFormat", "dd/MM/yyyy").load("src/main/resources/user.csv");
> 		users.printSchema();
> {code}
> expected scheme should be 
> {code}
> root
>  |-- id: string (nullable = true)
>  |-- project: string (nullable = true)
>  |-- started: date (nullable = true)
>  |-- ended: date (nullable = true)
> {code}
> but the actual result is: 
> {code}
> root
>  |-- id: string (nullable = true)
>  |-- project: string (nullable = true)
>  |-- started: string (nullable = true)
>  |-- ended: string (nullable = true)
> {code}
> This mean that date processed as string and "dateFormat" option is ignored.
> If I add option 
> {code}
> .option("timestampFormat", "dd/MM/yyyy")
> {code}
> result is: 
> {code}
> root
>  |-- id: string (nullable = true)
>  |-- project: string (nullable = true)
>  |-- started: timestamp (nullable = true)
>  |-- ended: timestamp (nullable = true)
> {code}
> I think, the issue is somewhere in object CSVInferSchema, function inferField, lines 80-97 and
> method "tryParseDate" need to be added before/after "tryParseTimestamp", or date/timestamp process logic need to be changed.



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