Tongjie Chen created HIVE-6783:
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Summary: 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
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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