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https://issues.apache.org/jira/browse/HIVE-6783?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13995680#comment-13995680
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Sushanth Sowmyan commented on HIVE-6783:
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(Btw, to be explicit, this has been accepted for inclusion in 0.13.1, and will
be part of it)
> Incompatible schema for maps between parquet-hive and parquet-pig
> -----------------------------------------------------------------
>
> Key: HIVE-6783
> URL: https://issues.apache.org/jira/browse/HIVE-6783
> Project: Hive
> Issue Type: Bug
> Components: File Formats
> Affects Versions: 0.13.0
> Reporter: Tongjie Chen
> Fix For: 0.14.0, 0.13.1
>
> Attachments: HIVE-6783.1.patch.txt, HIVE-6783.2.patch.txt,
> HIVE-6783.3.patch.txt, HIVE-6783.4.patch.txt
>
>
> see also in following parquet issue:
> https://github.com/Parquet/parquet-mr/issues/290
> The schema written for maps isn't compatible between hive and pig. This means
> any files written in one cannot be properly read in the other.
> More specifically, for the same map column c1, parquet-pig generates schema:
> message pig_schema {
> optional group c1 (MAP) {
> repeated group map (MAP_KEY_VALUE) {
> required binary key (UTF8);
> optional binary value;
> }
> }
> }
> while parquet-hive generates schema:
> message hive_schema {
> optional group c1 (MAP_KEY_VALUE) {
> repeated group map {
> required binary key;
> optional binary value;
> }
> }
> }
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