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https://issues.apache.org/jira/browse/SPARK-16903?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15408735#comment-15408735
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Hyukjin Kwon commented on SPARK-16903:
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Oh, I thought we should apply {{nullValue}} to all types equivalently including
{{StringType}}. (Just FYI in case you missed.. this is being discussed in
https://github.com/apache/spark/pull/14118)
> nullValue in first field is not respected by CSV source when read
> -----------------------------------------------------------------
>
> Key: SPARK-16903
> URL: https://issues.apache.org/jira/browse/SPARK-16903
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 2.0.0
> Reporter: Hossein Falaki
>
> file:
> {code}
> a,-
> -,10
> {code}
> Query:
> {code}
> create temporary table test(key string, val decimal)
> using com.databricks.spark.csv
> options (path "/tmp/hossein2/null.csv", header "false", delimiter ",",
> nullValue "-");
> {code}
> Result:
> {code}
> select count(*) from test where key is null
> 0
> {code}
> But
> {code}
> select count(*) from test where val is null
> 1
> {code}
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