Quanlong Huang created IMPALA-10890:
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Summary: Show pushed down predicates in query plan
Key: IMPALA-10890
URL: https://issues.apache.org/jira/browse/IMPALA-10890
Project: IMPALA
Issue Type: Improvement
Components: Frontend
Reporter: Quanlong Huang
We push down predicates that can leverage parquet statistics. Similar works for
ORC are on-going in IMPALA-6505 and IMPALA-10873. It'd be useful to show the
final pushed down form of these predicates. E.g.
* predicate '{{x = 5}}' is transformed into two predicates '{{x <= 5}}' and
'{{x >= 5}}' for parquet.
* predicate '{{x in [0, 50, 100]}}' is transformed into two predicates '{{x >=
0}}' and '{{x <= 100}}' for parquet.
The query plan only shows the original predicates in the line of "parquet
statistics predicates:". It helps to understand the performance if the final
predicates are also shown.
For ORC columns that have bloom filter enabled, we'd like to push down the
IN-list predicate directly instead of transformed it into range predicates.
Showing the final predicates make this visible.
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