[
https://issues.apache.org/jira/browse/CALCITE-6652?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
suibianwanwan updated CALCITE-6652:
-----------------------------------
Description:
The following query can't decorrelate by RelDecorrelate:
{code:java}
@Test void testDecorrelateFetchOne1() {
final String query = "SELECT deptno FROM dept WHERE\n" +
"1000 > (SELECT sal FROM emp WHERE dept.deptno = emp.deptno order by
emp.sal limit 1)";
sql(query).withRule(
CoreRules.FILTER_SUB_QUERY_TO_CORRELATE)
.withLateDecorrelate(true)
.check();
}{code}
is equivalent to the following query, and the following query can be
decorrelated into a join, so we can do some appropriate conversions in
RelDecorrelate:
{code:java}
@Test void testDecorrelateFetchOne1() {
final String query = "SELECT deptno FROM dept WHERE\n" +
"1000 > (SELECT min(sal) FROM emp WHERE dept.deptno = emp.deptno)";
sql(query).withRule(
CoreRules.FILTER_SUB_QUERY_TO_CORRELATE)
.withLateDecorrelate(true)
.check();
}{code}
was:
The following query can't decorrelate by RelDecorrelate:
{code:java}
@Test void testDecorrelateFetchOne1() {
final String query = "SELECT deptno FROM dept WHERE\n" +
"1000 > (SELECT sal FROM emp WHERE dept.deptno = emp.deptno order by
emp.sal limit 1)";
sql(query).withRule(
CoreRules.FILTER_SUB_QUERY_TO_CORRELATE)
.withLateDecorrelate(true)
.check();
}
@Test void testDecorrelateFetchOne2() {
final String query = "SELECT deptno, (SELECT sal FROM emp where dept.deptno =
emp.deptno order by emp.sal limit 1) FROM dept";
sql(query).withRule(
CoreRules.PROJECT_SUB_QUERY_TO_CORRELATE)
.withLateDecorrelate(true)
.check();
}
@Test void testDecorrelateFetchOne3() {
final String query = "SELECT deptno, (SELECT sal FROM emp where dept.deptno =
emp.deptno order by emp.sal desc limit 1) FROM dept";
sql(query).withRule(
CoreRules.PROJECT_SUB_QUERY_TO_CORRELATE)
.withLateDecorrelate(true)
.check();
}{code}
is equivalent to the following query, and the following query can be
decorrelated into a join, so we can do some appropriate conversions in
RelDecorrelate:
{code:java}
@Test void testDecorrelateFetchOne1() {
final String query = "SELECT deptno FROM dept WHERE\n" +
"1000 > (SELECT min(sal) FROM emp WHERE dept.deptno = emp.deptno)";
sql(query).withRule(
CoreRules.FILTER_SUB_QUERY_TO_CORRELATE)
.withLateDecorrelate(true)
.check();
}
@Test void testDecorrelateFetchOne2() {
final String query = "SELECT deptno, (SELECT SINGLE_VALUE(sal) FROM emp where
dept.deptno = emp.deptno) FROM dept";
sql(query).withRule(
CoreRules.PROJECT_SUB_QUERY_TO_CORRELATE)
.withLateDecorrelate(true)
.check();
}
@Test void testDecorrelateFetchOne3() {
final String query = "SELECT deptno, (SELECT max(sal) FROM emp where
dept.deptno = emp.deptno) FROM dept";
sql(query).withRule(
CoreRules.PROJECT_SUB_QUERY_TO_CORRELATE)
.withLateDecorrelate(true)
.check();
}{code}
> RelDecorrelator can't decorrelate query with limit 1
> ----------------------------------------------------
>
> Key: CALCITE-6652
> URL: https://issues.apache.org/jira/browse/CALCITE-6652
> Project: Calcite
> Issue Type: Bug
> Reporter: suibianwanwan
> Assignee: suibianwanwan
> Priority: Major
>
> The following query can't decorrelate by RelDecorrelate:
> {code:java}
> @Test void testDecorrelateFetchOne1() {
> final String query = "SELECT deptno FROM dept WHERE\n" +
> "1000 > (SELECT sal FROM emp WHERE dept.deptno = emp.deptno order by
> emp.sal limit 1)";
> sql(query).withRule(
> CoreRules.FILTER_SUB_QUERY_TO_CORRELATE)
> .withLateDecorrelate(true)
> .check();
> }{code}
> is equivalent to the following query, and the following query can be
> decorrelated into a join, so we can do some appropriate conversions in
> RelDecorrelate:
> {code:java}
> @Test void testDecorrelateFetchOne1() {
> final String query = "SELECT deptno FROM dept WHERE\n" +
> "1000 > (SELECT min(sal) FROM emp WHERE dept.deptno = emp.deptno)";
> sql(query).withRule(
> CoreRules.FILTER_SUB_QUERY_TO_CORRELATE)
> .withLateDecorrelate(true)
> .check();
> }{code}
--
This message was sent by Atlassian Jira
(v8.20.10#820010)
