Vincent Tran has uploaded a new change for review.
http://gerrit.cloudera.org:8080/7168
Change subject: IMPALA-5494: NOT IN predicate shares the same selectivity as IN
predicate.
......................................................................
IMPALA-5494: NOT IN predicate shares the same selectivity as
IN predicate.
This change modifies the logic of NOT IN predicate so that
the planner can calculate the correct node cardinality. Prior
to this change, both IN and NOT IN predicates shared the
same selectivity, which resulted in the same cardinality
during planning.
The selectivity is calculated by the following heuristic:
selectivity = 1 - (num of predicae children /
num of distinct values)
Change-Id: I69e6217257b5618cb63e13b32ba3347fa0483b63
---
M fe/src/main/java/org/apache/impala/analysis/InPredicate.java
M tests/metadata/test_explain.py
2 files changed, 17 insertions(+), 2 deletions(-)
git pull ssh://gerrit.cloudera.org:29418/Impala-ASF refs/changes/68/7168/1
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Gerrit-MessageType: newchange
Gerrit-Change-Id: I69e6217257b5618cb63e13b32ba3347fa0483b63
Gerrit-PatchSet: 1
Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-Owner: Vincent Tran <[email protected]>
