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https://issues.apache.org/jira/browse/CALCITE-5691?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17720729#comment-17720729
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Runkang He edited comment on CALCITE-5691 at 5/9/23 2:26 AM:
-------------------------------------------------------------
[~soumyava] you are welcome.
The issue is not related to filter clause, just a bug when check whether an
expression is effectively NOT NULL. I can reproduce it with follow SQL:
{code:sql}
SELECT empno IN (SELECT deptno FROM empnullables) IS TRUE
FROM empnullables
{code}
This issue happends in filter clause, because filter clause generates the
projection with IS_TRUE(RexSubQuery), and RexSubQuery's type is nullable in
this case, when we simplify IS_TRUE, we will check the operand RexSubQuery's
isEffectivelyNotNull, and it fails for the reason above.
was (Author: JIRAUSER280488):
[~soumyava] you are welcome.
The issue is not related to filter clause, just a bug when check whether an
expression is effectively NOT NULL. I can reproduce it with follow SQL:
{code:sql}
SELECT empno IN (SELECT deptno FROM empnullables) IS TRUE FROM empnullables
{code}
This issue happends in filter clause, because filter clause generates the
projection with IS_TRUE(RexSubQuery), and RexSubQuery's type is nullable in
this case, when we simplify IS_TRUE, we will check the operand RexSubQuery's
isEffectivelyNotNull, and it fails for the reason above.
> Planning error with subquery inside filter clause
> -------------------------------------------------
>
> Key: CALCITE-5691
> URL: https://issues.apache.org/jira/browse/CALCITE-5691
> Project: Calcite
> Issue Type: Bug
> Affects Versions: 1.34.0
> Environment: SqlLine
> Reporter: Soumyava Das
> Assignee: Runkang He
> Priority: Major
>
> I tried a query which is similar to the one I use in the sqlline component
> and I see the query still to fail. The query is
> {code:java}
> select
> count(*) filter (where trim(both from name) in (select city from emps))
> from emps; {code}
> {code:java}
> 0: jdbc:calcite:model=src/test/resources/mode> select * from emps;
> +-------+-------+--------+--------+---------------+-------+------+---------+---------+------------+
> | EMPNO | NAME | DEPTNO | GENDER | CITY | EMPID | AGE | SLACKER |
> MANAGER | JOINEDAT |
> +-------+-------+--------+--------+---------------+-------+------+---------+---------+------------+
> | 100 | Fred | 10 | | | 30 | 25 | true |
> false | 1996-08-03 |
> | 110 | Eric | 20 | M | San Francisco | 3 | 80 | |
> false | 2001-01-01 |
> | 110 | John | 40 | M | Vancouver | 2 | null | false |
> true | 2002-05-03 |
> | 120 | Wilma | 20 | F | | 1 | 5 | |
> true | 2005-09-07 |
> | 130 | Alice | 40 | F | Vancouver | 2 | null | false |
> true | 2007-01-01 |
> +-------+-------+--------+--------+---------------+-------+------+---------+---------+------------+
> 5 rows selected (0.025 seconds)
> 0: jdbc:calcite:model=src/test/resources/mode> select
> . . . . . . . . . . . . . . . . . . semicolon> count(*) filter (where
> trim(both from name) in (select city from emps))
> . . . . . . . . . . . . . . . . . . semicolon> from emps;
> Error: Error while executing SQL "select
> count(*) filter (where trim(both from name) in (select city from emps))
> from emps": index (1) must be less than size (1) (state=,code=0){code}
> The stack trace that I typically see for this is
> {code:java}
> java.lang.IndexOutOfBoundsException: index (1) must be less than size (1)
> at
> com.google.common.base.Preconditions.checkElementIndex(Preconditions.java:313)
> at
> com.google.common.base.Preconditions.checkElementIndex(Preconditions.java:295)
> at
> com.google.common.collect.SingletonImmutableList.get(SingletonImmutableList.java:45)
> at
> org.apache.calcite.plan.RelOptPredicateList.isEffectivelyNotNull(RelOptPredicateList.java:240)
> at
> org.apache.calcite.rex.RexSimplify.simplifyIs2(RexSimplify.java:911) at
> org.apache.calcite.rex.RexSimplify.simplifyIs1(RexSimplify.java:869) at
> org.apache.calcite.rex.RexSimplify.simplifyIs(RexSimplify.java:840) at
> org.apache.calcite.rex.RexSimplify.simplify(RexSimplify.java:301) at
> org.apache.calcite.rex.RexSimplify.simplifyUnknownAs(RexSimplify.java:248)
> at
> org.apache.calcite.rex.RexSimplify.simplifyPreservingType(RexSimplify.java:187)
> at
> org.apache.calcite.rex.RexSimplify.simplifyPreservingType(RexSimplify.java:182)
> at org.apache.calcite.tools.RelBuilder.project_(RelBuilder.java:1993)
> at org.apache.calcite.tools.RelBuilder.project(RelBuilder.java:1840) at
> org.apache.calcite.tools.RelBuilder.projectNamed(RelBuilder.java:2161)
> at org.apache.calcite.tools.RelBuilder.projectNamed(RelBuilder.java:2098)
> at
> org.apache.calcite.sql2rel.SqlToRelConverter.createAggImpl(SqlToRelConverter.java:3464)
> at
> org.apache.calcite.sql2rel.SqlToRelConverter.convertAgg(SqlToRelConverter.java:3367)
> at
> org.apache.calcite.sql2rel.SqlToRelConverter.convertSelectImpl(SqlToRelConverter.java:754)
> at
> org.apache.calcite.sql2rel.SqlToRelConverter.convertSelect(SqlToRelConverter.java:680)
> at
> org.apache.calcite.sql2rel.SqlToRelConverter.convertQueryRecursive(SqlToRelConverter.java:3765)
> at
> org.apache.calcite.sql2rel.SqlToRelConverter.convertQuery(SqlToRelConverter.java:600)
> {code}
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