Hyukjin Kwon created SPARK-17583:
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Summary: Remove unused rowSeparator variable and set
auto-expanding buffer as default for maxCharsPerColumn option in CSV
Key: SPARK-17583
URL: https://issues.apache.org/jira/browse/SPARK-17583
Project: Spark
Issue Type: Improvement
Components: SQL
Affects Versions: 2.0.0
Reporter: Hyukjin Kwon
Priority: Minor
This JIRA includes several changes below:
1. Upgrade Univocity library from 2.1.1 to 2.2.1
This includes some performance improvement and also enabling auto-extending
buffer in {{maxCharsPerColumn}} option in CSV. Please refer the [release
notes|https://github.com/uniVocity/univocity-parsers/releases].
2. Remove {{rowSeparator}} variable existing in {{CSVOptions}}
We have this variable in
[CSVOptions|https://github.com/apache/spark/blob/29952ed096fd2a0a19079933ff691671d6f00835/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/csv/CSVOptions.scala#L127]
but it seems possibly causing confusion that it actually does not care of
{{\r\n}}. For example, we have an issue open about this SPARK-17227 describing
this variable
This options is virtually not being used because we rely on
{{LineRecordReader}} in Hadoop which deals with only both {{\n}} and {{\r\n}}.
3. Setting the default value of {{maxCharsPerColumn}} to auto-expending
We are setting 1000000 for the length of each column. It'd be more sensible we
allow auto-expending rather than fixed length by default.
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