Quanlong Huang created IMPALA-10894:
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Summary: Pushing down predicates in reading "original files" of
ACID tables
Key: IMPALA-10894
URL: https://issues.apache.org/jira/browse/IMPALA-10894
Project: IMPALA
Issue Type: Improvement
Reporter: Quanlong Huang
“Original files” don't store special ACID columns. We generate the row id by
using the row index of the file. The orc reader doesn't provide interfaces for
retrieving the row index of a row in the file. When predicates are pushed down
into the orc reader, the returned batch will skip some rows. So we can't
calculate the actual row index in file using its index in the batch.
Currently we skip pushing down predicates in reading such files.
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