Taran Saini updated SPARK-21684:
    Attachment: SparkQuotesTest2.scala

PFA the same.

> df.write double escaping all the already escaped characters except the first 
> one
> --------------------------------------------------------------------------------
>                 Key: SPARK-21684
>                 URL: https://issues.apache.org/jira/browse/SPARK-21684
>             Project: Spark
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 2.2.0
>            Reporter: Taran Saini
>         Attachments: SparkQuotesTest2.scala
> Hi,
> If we have a dataframe with the column value as {noformat} ab\,cd\,ef\,gh 
> {noformat}
> Then while writing it is being written as 
> {noformat} "ab\,cd\\,ef\\,gh" {noformat}
> i.e it double escapes all the already escaped commas/delimiters but not the 
> first one.
> This is weird behaviour considering either it should do for all or none.
> If I do mention df.option("escape","") as empty then it solves this problem 
> but the double quotes inside the same value if any are preceded by a special 
> char i.e '\u00'. Why does it do so when the escape character is set as 
> ""(empty)?

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