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https://issues.apache.org/jira/browse/DERBY-4380?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12757076#action_12757076
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Knut Anders Hatlen commented on DERBY-4380:
-------------------------------------------
>From JoinNode:
/* DB2 doesn't allow subquerries in the ON clause */
if (subqueryList.size() > 0)
throw
StandardException.newException(SQLState.LANG_DB2_ON_CLAUSE_INVALID);
> SOME not allowed in ON clause
> -----------------------------
>
> Key: DERBY-4380
> URL: https://issues.apache.org/jira/browse/DERBY-4380
> Project: Derby
> Issue Type: Bug
> Components: Store
> Reporter: Bernt M. Johnsen
>
> SOME is not allowed in ON-clause:
> ij> create table t1 (i integer);
> 0 rows inserted/updated/deleted
> ij> create table t2 (i integer);
> 0 rows inserted/updated/deleted
> ij> create table t3 (i integer);
> 0 rows inserted/updated/deleted
> ij> insert into t1 values (1);
> 1 row inserted/updated/deleted
> ij> insert into t2 values (2);
> 1 row inserted/updated/deleted
> ij> insert into t3 values 2,3,4;
> 3 rows inserted/updated/deleted
> ij> select * from t1 where t1.i = some (select i from t3);
> I
> -----------
> 0 rows selected
> ij> select * from t1 inner join t2 on t1.i = some (select i from t3);
> ERROR 42972: An ON clause associated with a JOIN operator is not valid.
> ij>
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