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https://issues.apache.org/jira/browse/CALCITE-2427?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16574569#comment-16574569
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Pressenna commented on CALCITE-2427:
------------------------------------
[~julianhyde], we managed to get the sub-queries working.
The patch is very minimal.
{code:java}
private RelNode convertUpdate(SqlUpdate call) {
final SqlValidatorScope scope =
validator.getWhereScope(call.getSourceSelect());
Blackboard bb = createBlackboard(scope, null, false);
// this line is new
replaceSubQueries(bb, call, RelOptUtil.Logic.TRUE_FALSE_UNKNOWN);
{code}
> Sub-queries not supported in DML statements
> -------------------------------------------
>
> Key: CALCITE-2427
> URL: https://issues.apache.org/jira/browse/CALCITE-2427
> Project: Calcite
> Issue Type: Bug
> Components: core
> Affects Versions: 1.14.0, 1.15.0, 1.16.0
> Reporter: Pressenna
> Assignee: Julian Hyde
> Priority: Major
>
> It appears that subqueries are not supported in DML statements.
> The yield in a NPE.
> Respective
> [testcase|https://github.com/apache/calcite/blob/be3048300e140c5e9e5b4d23c0b27accd0af4c4d/core/src/test/java/org/apache/calcite/test/SqlToRelConverterTest.java#L1986]
> is disabled with reference to CALCITE-1527.
> {code:java}
> @Ignore("CALCITE-1527")
> @Test public void testUpdateSubQuery() {
> final String sql = "update emp\n"
> + "set empno = (\n"
> + " select min(empno) from emp as e where e.deptno = emp.deptno)";
> sql(sql).ok();
> }
> {code}
>
>
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