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https://issues.apache.org/jira/browse/ORC-688?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dongjoon Hyun updated ORC-688:
------------------------------
Component/s: Java
> Allow CHAR, VARCHAR to be promoted to STRING
> --------------------------------------------
>
> Key: ORC-688
> URL: https://issues.apache.org/jira/browse/ORC-688
> Project: ORC
> Issue Type: Wish
> Components: Java
> Affects Versions: 1.7.0
> Reporter: Shardul Mahadik
> Assignee: Panagiotis Garefalakis
> Priority: Major
> Fix For: 1.7.0
>
>
> E.g. For the evolution File type {{struct<x:char(10)>}} Reader type
> {{struct<x:string>}}
> we currently get the following error
> {code}
> java.lang.IllegalArgumentException: No conversion of type STRING to self
> needed
> at
> org.apache.orc.impl.ConvertTreeReaderFactory.createStringConvertTreeReader(ConvertTreeReaderFactory.java:1954)
> at
> org.apache.orc.impl.ConvertTreeReaderFactory.createConvertTreeReader(ConvertTreeReaderFactory.java:2267)
> at
> org.apache.orc.impl.TreeReaderFactory.createTreeReader(TreeReaderFactory.java:2804)
> at
> org.apache.orc.impl.TreeReaderFactory$StructTreeReader.<init>(TreeReaderFactory.java:2420)
> at
> org.apache.orc.impl.TreeReaderFactory.createTreeReader(TreeReaderFactory.java:2844)
> at
> org.apache.orc.impl.TreeReaderFactory.createRootReader(TreeReaderFactory.java:2859)
> {code}
> Should we allow such an evolution?
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