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https://issues.apache.org/jira/browse/SPARK-6607?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Cheng Lian updated SPARK-6607:
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Target Version/s: 1.4.0
Affects Version/s: 1.1.1
1.2.1
1.3.0
> Aggregation attribute name including special chars '(' and ')' should be
> replaced before generating Parquet schema
> ------------------------------------------------------------------------------------------------------------------
>
> Key: SPARK-6607
> URL: https://issues.apache.org/jira/browse/SPARK-6607
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 1.1.1, 1.2.1, 1.3.0
> Reporter: Liang-Chi Hsieh
> Assignee: Liang-Chi Hsieh
>
> '(' and ')' are special characters used in Parquet schema for type
> annotation. When we run an aggregation query, we will obtain attribute name
> such as "MAX(a)".
> If we directly store the generated DataFrame as Parquet file, it causes
> failure when reading and parsing the stored schema string.
> Several methods can be adopted to solve this. This pr uses a simplest one to
> just replace attribute names before generating Parquet schema based on these
> attributes.
> Another possible method might be modifying all aggregation expression names
> from "func(column)" to "func[column]".
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