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https://issues.apache.org/jira/browse/HIVE-17593?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16178697#comment-16178697
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Junjie Chen commented on HIVE-17593:
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hive strip spaces for char(lengh) type, and then store value to parquet.
Other parquet reader may read striped value which is different from original.
public void write(Object value) {
String v = inspector.getPrimitiveJavaObject(value).getStrippedValue();
recordConsumer.addBinary(Binary.fromString(v));
}
[~Ferd], do you think this is a valid case? Shouldn't it store the real value?
> DataWritableWriter strip spaces for CHAR type before writing, but predicate
> generator doesn't do same thing.
> ------------------------------------------------------------------------------------------------------------
>
> Key: HIVE-17593
> URL: https://issues.apache.org/jira/browse/HIVE-17593
> Project: Hive
> Issue Type: Bug
> Affects Versions: 3.0.0
> Reporter: Junjie Chen
>
> DataWritableWriter strip spaces for CHAR type before writing. While when
> generating predicate, it does NOT do same striping which should cause data
> missing!
> In current version, it doesn't cause data missing since predicate is not well
> push down to parquet due to HIVE-17261.
> Please see ConvertAstTosearchArg.java, getTypes treats CHAR and STRING as
> same which will build a predicate with tail spaces.
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