[
https://issues.apache.org/jira/browse/HIVE-24154?focusedWorklogId=483661&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-483661
]
ASF GitHub Bot logged work on HIVE-24154:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 13/Sep/20 16:03
Start Date: 13/Sep/20 16:03
Worklog Time Spent: 10m
Work Description: jcamachor commented on a change in pull request #1492:
URL: https://github.com/apache/hive/pull/1492#discussion_r487546716
##########
File path:
ql/src/java/org/apache/hadoop/hive/ql/optimizer/calcite/rules/HivePointLookupOptimizerRule.java
##########
@@ -734,6 +721,30 @@ private RexNode useStructIfNeeded(List<? extends RexNode>
columns) {
}
operands.remove(i);
--i;
+ } else if (operand.getKind() == SqlKind.EQUALS) {
+ Constraint c = Constraint.of(operand);
+ if (c == null || !HiveCalciteUtil.isDeterministic(c.exprNode)) {
+ continue;
+ }
+ String ref = c.exprNode.toString();
+ stringToExpr.put(ref, c.exprNode);
+ if (inLHSExprToRHSExprs.containsKey(ref)) {
+ String expr = c.constNode.toString();
+ stringToExpr.put(expr, c.constNode);
Review comment:
Makes sense, I will simplify this code.
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Issue Time Tracking
-------------------
Worklog Id: (was: 483661)
Time Spent: 50m (was: 40m)
> Missing simplification opportunity with IN and EQUALS clauses
> -------------------------------------------------------------
>
> Key: HIVE-24154
> URL: https://issues.apache.org/jira/browse/HIVE-24154
> Project: Hive
> Issue Type: Improvement
> Components: CBO
> Reporter: Jesus Camacho Rodriguez
> Assignee: Jesus Camacho Rodriguez
> Priority: Minor
> Labels: pull-request-available
> Time Spent: 50m
> Remaining Estimate: 0h
>
> For instance, in perf driver CBO query 74, there are several filters that
> could be simplified further:
> {code}
> HiveFilter(condition=[AND(=($1, 1999), IN($1, 1998, 1999))])
> {code}
> This may lead to incorrect estimates and leads to unnecessary execution time.
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