[
https://issues.apache.org/jira/browse/SPARK-18424?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15660291#comment-15660291
]
Bill Chambers edited comment on SPARK-18424 at 11/12/16 9:31 PM:
-----------------------------------------------------------------
For the record I would like to work on this one.
Define Function here:
https://github.com/apache/spark/blob/master/sql/core/src/main/scala/org/apache/spark/sql/functions.scala
Register Function here:
?
Add tests:
Here:
https://github.com/apache/spark/blob/9c8deef64efee20a0ddc9b612f90e77c80aede60/sql/core/src/test/scala/org/apache/spark/sql/DateFunctionsSuite.scala
Here:
https://github.com/apache/spark/blob/9c8deef64efee20a0ddc9b612f90e77c80aede60/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/DateExpressionsSuite.scala
was (Author: bill_chambers):
For the record I would like to work on this one.
It seems that I will have to add some tests:
Here:
https://github.com/apache/spark/blob/9c8deef64efee20a0ddc9b612f90e77c80aede60/sql/core/src/test/scala/org/apache/spark/sql/DateFunctionsSuite.scala
Here:
https://github.com/apache/spark/blob/9c8deef64efee20a0ddc9b612f90e77c80aede60/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/DateExpressionsSuite.scala
> Improve Date Parsing Functionality
> ----------------------------------
>
> Key: SPARK-18424
> URL: https://issues.apache.org/jira/browse/SPARK-18424
> Project: Spark
> Issue Type: Improvement
> Reporter: Bill Chambers
> Priority: Minor
>
> I've found it quite cumbersome to work with dates thus far in Spark, it can
> be hard to reason about the timeformat and what type you're working with, for
> instance:
> say that I have a date in the format
> {code}
> 2017-20-12
> // Y-D-M
> {code}
> In order to parse that into a Date, I have to perform several conversions.
> {code}
> to_date(
> unix_timestamp(col("date"), dateFormat)
> .cast("timestamp"))
> .alias("date")
> {code}
> I propose simplifying this by adding a to_date function (exists) but adding
> one that accepts a format for that date. I also propose a to_timestamp
> function that also supports a format.
> so that you can avoid entirely the above conversion.
> It's also worth mentioning that many other databases support this. For
> instance, mysql has the STR_TO_DATE function, netezza supports the
> to_timestamp semantic.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
---------------------------------------------------------------------
To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org
For additional commands, e-mail: issues-h...@spark.apache.org
