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https://issues.apache.org/jira/browse/CALCITE-2348?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16499701#comment-16499701
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godfrey he commented on CALCITE-2348:
-------------------------------------
It means the rules do't take care of non-deterministic operator ?
Maybe we can ignore this transformation when the operator is non-deterministic
to guarantee equivalent transformation for
RelOptRule.
just like
[HiveFilterAggregateTransposeRule|https://github.com/apache/hive/blob/master/ql/src/java/org/apache/hadoop/hive/ql/optimizer/calcite/rules/HiveFilterAggregateTransposeRule.java],
[HiveFilterJoinRule|https://github.com/apache/hive/blob/master/ql/src/java/org/apache/hadoop/hive/ql/optimizer/calcite/rules/HiveFilterJoinRule.java],
[HiveFilterProjectTransposeRule|https://github.com/apache/hive/blob/master/ql/src/java/org/apache/hadoop/hive/ql/optimizer/calcite/rules/HiveFilterProjectTransposeRule.java],
[HiveFilterProjectTransposeRule|https://github.com/apache/hive/blob/master/ql/src/java/org/apache/hadoop/hive/ql/optimizer/calcite/rules/HiveFilterProjectTransposeRule.java],
[HiveFilterSetOpTransposeRule|https://github.com/apache/hive/blob/master/ql/src/java/org/apache/hadoop/hive/ql/optimizer/calcite/rules/HiveFilterSetOpTransposeRule.java]
in hive.
PR for this: [https://github.com/apache/calcite/pull/717]
Looking forward to your advice, many thanks!
> handling non-deterministic operator in rules
> --------------------------------------------
>
> Key: CALCITE-2348
> URL: https://issues.apache.org/jira/browse/CALCITE-2348
> Project: Calcite
> Issue Type: Bug
> Components: core
> Affects Versions: 1.17.0
> Reporter: godfrey he
> Assignee: Julian Hyde
> Priority: Major
>
> Currently, rules do not handle non-deterministic operator,
> e.g. FilterAggregateTransposeRule can't push down a non-deterministic filter
> through an aggregate.
> {code:java}
> // rand_substr is a non-deterministic udf
> @Test public void testPushFilterPastAggWithNondeterministicFilter() {
> final String sql = "select ename, empno, c from\n"
> + " (select ename, empno, count(*) as c from emp group by ename, empno)
> t\n"
> + " where rand_substr(ename, 1, 3) = 'Tom' and empno = 10";
> checkPlanning(FilterAggregateTransposeRule.INSTANCE, sql);
> }{code}
>
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