[
https://issues.apache.org/jira/browse/CALCITE-7900?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Mihai Budiu resolved CALCITE-7900.
----------------------------------
Fix Version/s: 1.43.0
Resolution: Fixed
Fixed in
[https://github.com/apache/calcite/commit/1be8d0b37a0e1139f4dc348a59d1816e85e02798]
Thank you for the review [~xuzifu666]
> Query with DISTINCT ON crashes
> ------------------------------
>
> Key: CALCITE-7900
> URL: https://issues.apache.org/jira/browse/CALCITE-7900
> Project: Calcite
> Issue Type: Bug
> Components: core
> Affects Versions: 1.42.0
> Reporter: Mihai Budiu
> Assignee: Mihai Budiu
> Priority: Minor
> Labels: pull-request-available
> Fix For: 1.43.0
>
>
> The following query crashes at runtime (with a conformance which enables
> DISTINCT ON):
> {code:java}
> SELECT * FROM (
> SELECT DISTINCT ON (deptno) empno, ename, deptno
> FROM emp
> ORDER BY deptno, empno) AS t
> ORDER BY deptno;{code}
> stack trace:
> {code:java}
> java.sql.SQLException: Error while executing SQL "SELECT * FROM (...)": Index
> 0 out of bounds for length 0
> Caused by: java.lang.IndexOutOfBoundsException: Index 0 out of bounds for
> length 0
> at java.base/java.util.ArrayList.get(ArrayList.java:427)
> at
> org.apache.calcite.sql2rel.SqlToRelConverter.convertDistinctOn(SqlToRelConverter.java:1075)
> at
> org.apache.calcite.sql2rel.SqlToRelConverter.convertSelectImpl(SqlToRelConverter.java:862)
> at
> org.apache.calcite.sql2rel.SqlToRelConverter.convertSelect(SqlToRelConverter.java:752)
> at
> org.apache.calcite.sql2rel.SqlToRelConverter.convertQueryRecursive(SqlToRelConverter.java:4445)
> at
> org.apache.calcite.sql2rel.SqlToRelConverter.convertFrom(SqlToRelConverter.java:2887)
> {code}
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