Csaba Ringhofer created IMPALA-12206:
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Summary: Improve metrics for late materialization
Key: IMPALA-12206
URL: https://issues.apache.org/jira/browse/IMPALA-12206
Project: IMPALA
Issue Type: Improvement
Components: Backend
Reporter: Csaba Ringhofer
Based on the profile it can be hard to tell whether late materialization was
useful. For example in "SELECT * FROM functional_parquet.alltypesagg WHERE
bigint_col = 1000 AND int_col = 50;" all rows are skipped based on only 2
columns, but in the profile NumPagesSkippedByLateMaterialization is 0, while
practically a lot pages were skipped for the rest of the columns.
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