[jira] [Commented] (SPARK-12848) Parse number as decimal

["Herman van Hovell (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SPARK-12848?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15102763#comment-15102763 ] 

Herman van Hovell commented on SPARK-12848:
-------------------------------------------

Assuming that we are talking about literals here. It is quite easy to change the parse defaults for that.

The way it is currently done is that when we find a decimal number, {{1.23}} for example, we will convert it into a Double (always). When a user needs a Decimal, he (or she) can use a BigDecimal literal for this by tagging the number with {{BD}}.

[~davies] I might not be getting the point you are making, but I think we have covered this by using BigDecimal literals. Could you provide an example otherwise?

> Parse number as decimal
> -----------------------
>
>                 Key: SPARK-12848
>                 URL: https://issues.apache.org/jira/browse/SPARK-12848
>             Project: Spark
>          Issue Type: Sub-task
>          Components: SQL
>            Reporter: Davies Liu
>
> Right now, Hive parser will parse 1.23 as double, when it's used with decimal columns, you will turn the decimal into double, lose the precision.
> We should follow most database had done, parse 1.23 as double, it will be converted into double when used with double.



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