Csaba Ringhofer created IMPALA-12157:
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Summary: Use predicates with OR in Parquet filtering
Key: IMPALA-12157
URL: https://issues.apache.org/jira/browse/IMPALA-12157
Project: IMPALA
Issue Type: Improvement
Components: Backend, Frontend
Reporter: Csaba Ringhofer
Currently the Parquet scanner doesn't use predicates like "WHERE a=1 OR b=2"
for dictionary and stat filtering.
The handling could look like this:
1. evaluate each conjunct at file level (file stats, dict filtering, bloom
filters)
- if all evaluate to false, skip the file
2. check the remaining conjunct's column indexes and create the union of the
valid ranges
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