[
https://issues.apache.org/jira/browse/CALCITE-6904?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Zhen Chen updated CALCITE-6904:
-------------------------------
Description:
The convert() method of ElementerableJoinRule incorrectly converts the
condition of IS_NOT_DISTINCT_FROM , which is considered an equivalence
condition in calcite and carries a `filterNulls` to save whether to perform
equivalence processing on NULL. However, when converting to ElementerableJoin,
the filterNulls are ignored, resulting in `IS_NOT_DISTINCT_FROM ($0, $1)` being
converted to `=($0, $1)`.
mysql case:
{code:java}
CREATE TABLE emps (
commission int
);
INSERT INTO emps VALUES (1);
INSERT INTO emps VALUES (2);
INSERT INTO emps VALUES (3);
INSERT INTO emps VALUES (NULL);
SELECT t1.commission FROM emps as t1
join
emps as t2
on t1.commission <=> t2.commission;
mysql result:
commission
1
2
3
NULL {code}
calcite jdbc case:
{code:java}
@Test void testIsNotDistinctFrom1() {
final String sql = ""
+ "select \"t1\".\"commission\" from \"hr\".\"emps\" as \"t1\"\n"
+ "join\n"
+ "\"hr\".\"emps\" as \"t2\"\n"
+ "on \"t1\".\"commission\" is not distinct from \"t2\".\"commission\"";
CalciteAssert.hr()
.query(sql)
.explainContains("")
.returnsUnordered("commission=500",
"commission=null");
} {code}
debug result:
!image-2025-03-21-13-06-47-354.png|width=519,height=649!
was:
The convert() method of ElementerableJoinRule incorrectly converts the
condition of IS_NOT_DISTINCT_FROM , which is considered an equivalence
condition in calcite and carries a `filterNulls` to save whether to perform
equivalence processing on NULL. However, when converting to ElementerableJoin,
the filterNulls are ignored, resulting in `IS_NOT_DISTINCT_FROM ($0, $1)` being
converted to `=($0, $1)`.
mysql case:
{code:java}
CREATE TABLE emps (
commission int
);
INSERT INTO emps VALUES (1);
INSERT INTO emps VALUES (2);
INSERT INTO emps VALUES (3);
INSERT INTO emps VALUES (NULL);
SELECT t1.commission FROM emps as t1
join
emps as t2
on t1.commission <=> t2.commission;
mysql result:
commission
1
2
3
NULL {code}
calcite jdbc case:
{code:java}
@Test void testIsNotDistinctFrom1() {
final String sql = ""
+ "select \"t1\".\"commission\" from \"hr\".\"emps\" as \"t1\"\n"
+ "join\n"
+ "\"hr\".\"emps\" as \"t2\"\n"
+ "on \"t1\".\"commission\" is not distinct from \"t2\".\"commission\"";
CalciteAssert.hr()
.query(sql)
.explainContains("")
.returnsUnordered("commission=500",
"commission=null");
} {code}
> IS_NOT_DISTINCT_FROM is converted error in ElementerableJoinRule
> ----------------------------------------------------------------
>
> Key: CALCITE-6904
> URL: https://issues.apache.org/jira/browse/CALCITE-6904
> Project: Calcite
> Issue Type: Bug
> Reporter: Zhen Chen
> Priority: Major
> Attachments: image-2025-03-21-13-06-47-354.png
>
>
> The convert() method of ElementerableJoinRule incorrectly converts the
> condition of IS_NOT_DISTINCT_FROM , which is considered an equivalence
> condition in calcite and carries a `filterNulls` to save whether to perform
> equivalence processing on NULL. However, when converting to
> ElementerableJoin, the filterNulls are ignored, resulting in
> `IS_NOT_DISTINCT_FROM ($0, $1)` being converted to `=($0, $1)`.
>
> mysql case:
> {code:java}
> CREATE TABLE emps (
> commission int
> );
> INSERT INTO emps VALUES (1);
> INSERT INTO emps VALUES (2);
> INSERT INTO emps VALUES (3);
> INSERT INTO emps VALUES (NULL);
> SELECT t1.commission FROM emps as t1
> join
> emps as t2
> on t1.commission <=> t2.commission;
> mysql result:
> commission
> 1
> 2
> 3
> NULL {code}
> calcite jdbc case:
> {code:java}
> @Test void testIsNotDistinctFrom1() {
> final String sql = ""
> + "select \"t1\".\"commission\" from \"hr\".\"emps\" as \"t1\"\n"
> + "join\n"
> + "\"hr\".\"emps\" as \"t2\"\n"
> + "on \"t1\".\"commission\" is not distinct from
> \"t2\".\"commission\"";
> CalciteAssert.hr()
> .query(sql)
> .explainContains("")
> .returnsUnordered("commission=500",
> "commission=null");
> } {code}
> debug result:
> !image-2025-03-21-13-06-47-354.png|width=519,height=649!
>
>
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