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https://issues.apache.org/jira/browse/HIVE-17568?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16173860#comment-16173860
]
Ashutosh Chauhan commented on HIVE-17568:
-----------------------------------------
+1
Although we may potentially introduce casts, I think its better to not do that
for such type-unsafe queries.
> HiveJoinPushTransitivePredicatesRule may exchange predicates which are not
> valid on the other branch
> ----------------------------------------------------------------------------------------------------
>
> Key: HIVE-17568
> URL: https://issues.apache.org/jira/browse/HIVE-17568
> Project: Hive
> Issue Type: Bug
> Components: Logical Optimizer
> Reporter: Zoltan Haindrich
> Assignee: Zoltan Haindrich
> Attachments: HIVE-17568.01.patch
>
>
> Joining 2 tables on at least 1 column which is not the same type ;
> (integer/double for example).
> The calcite expressions require double/integer inputs which will became
> invalid if {{HiveJoinPushTransitivePredicatesRule}} pushes them to the other
> branch.
> query:
> {code}
> create table t1 (v string, k int);
> insert into t1 values ('people', 10), ('strangers', 20), ('parents', 30);
> create table t2 (v string, k double);
> insert into t2 values ('people', 10), ('strangers', 20), ('parents', 30);
> select * from t1 where t1.k in (select t2.k from t2 where t2.v='people') and
> t1.k<15;
> {code}
> results in:
> {code}
> java.lang.AssertionError: type mismatch:
> type1:
> DOUBLE
> type2:
> INTEGER
> at org.apache.calcite.util.Litmus$1.fail(Litmus.java:31)
> at org.apache.calcite.plan.RelOptUtil.eq(RelOptUtil.java:1841)
> at
> org.apache.calcite.rex.RexProgramBuilder$RegisterInputShuttle.visitInputRef(RexProgramBuilder.java:941)
> at
> org.apache.calcite.rex.RexProgramBuilder$RegisterInputShuttle.visitInputRef(RexProgramBuilder.java:919)
> at org.apache.calcite.rex.RexInputRef.accept(RexInputRef.java:112)
> at org.apache.calcite.rex.RexShuttle.visitList(RexShuttle.java:153)
> at org.apache.calcite.rex.RexShuttle.visitCall(RexShuttle.java:102)
> at
> org.apache.calcite.rex.RexProgramBuilder$RegisterShuttle.visitCall(RexProgramBuilder.java:884)
> at
> org.apache.calcite.rex.RexProgramBuilder$RegisterShuttle.visitCall(RexProgramBuilder.java:882)
> at org.apache.calcite.rex.RexCall.accept(RexCall.java:104)
> at
> org.apache.calcite.rex.RexProgramBuilder.registerInput(RexProgramBuilder.java:296)
> at
> org.apache.calcite.rex.RexProgramBuilder.addCondition(RexProgramBuilder.java:271)
> at
> org.apache.calcite.rel.rules.FilterMergeRule.createProgram(FilterMergeRule.java:98)
> at
> org.apache.calcite.rel.rules.FilterMergeRule.onMatch(FilterMergeRule.java:67)
> [...]
> {code}
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