Taran Saini created SPARK-21684:

             Summary: 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


If we have a dataframe with the column value as {noformat} ab\,cd\,ef\,gh 
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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