Zejun Li created HIVE-19779:
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Summary: HCatInputFormat cannot pushdown projection when read an
HBase table
Key: HIVE-19779
URL: https://issues.apache.org/jira/browse/HIVE-19779
Project: Hive
Issue Type: Bug
Environment: hive-hcatalog-core 1.1.0-cdh5.14.2
hive-hbase-handler 1.1.0-cdh5.14.2
Reporter: Zejun Li
I have used `HCatBaseInputFormat.setOutputSchema` to set a columns projection,
and the result `HCatRecord` only contains the specified cols indeed. But when I
check the `Result` returned by scan, I noticed that all cf and cols is selected.
Can HCatInputFormat do something like projection pushdown? Or is there any
documents to describe it?
BTW, will HCatInputFormat do this pushdown on columnar file formats like
Parquet?
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