allisonwang-db commented on code in PR #41301:
URL: https://github.com/apache/spark/pull/41301#discussion_r1292408953
##########
sql/catalyst/src/main/scala/org/apache/spark/sql/internal/SQLConf.scala:
##########
@@ -4268,6 +4268,15 @@ object SQLConf {
.checkValue(_ >= 0, "The threshold of cached local relations must not be
negative")
.createWithDefault(64 * 1024 * 1024)
+ val DECORRELATE_JOIN_PREDICATE_ENABLED =
+ buildConf("spark.sql.optimizer.decorrelateJoinPredicate.enabled")
+ .internal()
+ .doc("Decorrelate scalar and lateral subqueries with correlated
references in join " +
+ "predicates. Only enabled if DECORRELATE_INNER_QUERY_ENABLED is
enabled")
Review Comment:
```suggestion
s"predicates. This configuration is only effective when
'${DECORRELATE_INNER_QUERY_ENABLED.key}' is true.")
```
##########
sql/core/src/test/resources/sql-tests/results/subquery/scalar-subquery/scalar-subquery-predicate.sql.out:
##########
@@ -660,3 +660,39 @@ where (select t2.id c
struct<id:bigint>
-- !query output
1
+
+
+-- !query
+SELECT * FROM t0 WHERE t0a <
+(SELECT sum(t1c) FROM
+ (SELECT t1c
+ FROM t1 JOIN t2 ON (t1a = t0a AND t2b = t1b))
+)
+-- !query schema
+struct<t0a:int,t0b:int>
+-- !query output
+1 1
+
+
+-- !query
+SELECT * FROM t0 WHERE t0a <
+(SELECT sum(t1c) FROM
+ (SELECT t1c
+ FROM t1 JOIN t2 ON (t1a < t0a AND t2b >= t1b))
+)
+-- !query schema
+struct<t0a:int,t0b:int>
+-- !query output
+2 0
Review Comment:
Just want to make sure, we have verified these results are correct, right?
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