[jira] [Updated] (SPARK-43778) RewriteCorrelatedScalarSubquery should handle duplicate attributes
[ https://issues.apache.org/jira/browse/SPARK-43778?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] ASF GitHub Bot updated SPARK-43778: --- Labels: pull-request-available (was: ) > RewriteCorrelatedScalarSubquery should handle duplicate attributes > -- > > Key: SPARK-43778 > URL: https://issues.apache.org/jira/browse/SPARK-43778 > Project: Spark > Issue Type: Bug > Components: SQL >Affects Versions: 3.4.0 >Reporter: Andrey Gubichev >Priority: Major > Labels: pull-request-available > Fix For: 4.0.0 > > > This is a correctness problem caused by the fact that the decorrelation rule > does not dedup join attributes properly. This leads to the join on (c1 = c1), > which is simplified to True and the join becomes a cross product. > > Example query: > > {code:java} > create view t(c1, c2) as values (0, 1), (0, 2), (1, 2) > select c1, c2, (select count(*) cnt from t t2 where t1.c1 = t2.c1 having cnt > = 0) from t t1 > -- Correct answer: [(0, 1, null), (0, 2, null), (1, 2, null)] > +---+---+--+ > |c1 |c2 |scalarsubquery(c1)| > +---+---+--+ > |0 |1 |null | > |0 |1 |null | > |0 |2 |null | > |0 |2 |null | > |1 |2 |null | > |1 |2 |null | > +---+---+--+ {code} > > > -- This message was sent by Atlassian Jira (v8.20.10#820010) - To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org For additional commands, e-mail: issues-h...@spark.apache.org
[jira] [Updated] (SPARK-43778) RewriteCorrelatedScalarSubquery should handle duplicate attributes
[ https://issues.apache.org/jira/browse/SPARK-43778?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Andrey Gubichev updated SPARK-43778: Description: This is a correctness problem caused by the fact that the decorrelation rule does not dedup join attributes properly. This leads to the join on (c1 = c1), which is simplified to True and the join becomes a cross product. Example query: {code:java} create view t(c1, c2) as values (0, 1), (0, 2), (1, 2) select c1, c2, (select count(*) cnt from t t2 where t1.c1 = t2.c1 having cnt = 0) from t t1 -- Correct answer: [(0, 1, null), (0, 2, null), (1, 2, null)] +---+---+--+ |c1 |c2 |scalarsubquery(c1)| +---+---+--+ |0 |1 |null | |0 |1 |null | |0 |2 |null | |0 |2 |null | |1 |2 |null | |1 |2 |null | +---+---+--+ {code} was: This is a correctness problem caused by the fact that the decorrelation rule does not dedup join attributes properly. This leads to the join on (c1 = c1), which is simplified to True and the join becomes a cross product. Example query: create view t(c1, c2) as values (0, 1), (0, 2), (1, 2); select c1, c2, (select count(*) cnt from t t2 where t1.c1 = t2.c1 having cnt = 0) from t t1 – Correct answer: [(0, 1, null), (0, 2, null), (1, 2, null)] {+}--{-}{-}{+}-{-}++{-}- |c1|c2|scalarsubquery(c1)| {+}--{-}{-}{+}-{-}++{-}- |0|1|null| |0|1|null| |0|2|null| |0|2|null| |1|2|null| |1|2|null| {+}--{-}{-}{+}-{-}++{-}- > RewriteCorrelatedScalarSubquery should handle duplicate attributes > -- > > Key: SPARK-43778 > URL: https://issues.apache.org/jira/browse/SPARK-43778 > Project: Spark > Issue Type: Bug > Components: SQL >Affects Versions: 3.4.0 >Reporter: Andrey Gubichev >Priority: Major > > This is a correctness problem caused by the fact that the decorrelation rule > does not dedup join attributes properly. This leads to the join on (c1 = c1), > which is simplified to True and the join becomes a cross product. > > Example query: > > {code:java} > create view t(c1, c2) as values (0, 1), (0, 2), (1, 2) > select c1, c2, (select count(*) cnt from t t2 where t1.c1 = t2.c1 having cnt > = 0) from t t1 > -- Correct answer: [(0, 1, null), (0, 2, null), (1, 2, null)] > +---+---+--+ > |c1 |c2 |scalarsubquery(c1)| > +---+---+--+ > |0 |1 |null | > |0 |1 |null | > |0 |2 |null | > |0 |2 |null | > |1 |2 |null | > |1 |2 |null | > +---+---+--+ {code} > > > -- This message was sent by Atlassian Jira (v8.20.10#820010) - To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org For additional commands, e-mail: issues-h...@spark.apache.org
[jira] [Updated] (SPARK-43778) RewriteCorrelatedScalarSubquery should handle duplicate attributes
[ https://issues.apache.org/jira/browse/SPARK-43778?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Andrey Gubichev updated SPARK-43778: Description: This is a correctness problem caused by the fact that the decorrelation rule does not dedup join attributes properly. This leads to the join on (c1 = c1), which is simplified to True and the join becomes a cross product. Example query: create view t(c1, c2) as values (0, 1), (0, 2), (1, 2); select c1, c2, (select count(*) cnt from t t2 where t1.c1 = t2.c1 having cnt = 0) from t t1 – Correct answer: [(0, 1, null), (0, 2, null), (1, 2, null)] {+}--{-}{-}{+}-{-}++{-}- |c1|c2|scalarsubquery(c1)| {+}--{-}{-}{+}-{-}++{-}- |0|1|null| |0|1|null| |0|2|null| |0|2|null| |1|2|null| |1|2|null| {+}--{-}{-}{+}-{-}++{-}- was: This is a correctness problem caused by the fact that the decorrelation rule does not dedup join attributes properly. This leads to the join on (c1 = c1), which is simplified to True and the join becomes a cross product. Example query: create view t(c1, c2) as values (0, 1), (0, 2), (1, 2); select c1, c2, (select count(*) cnt from t t2 where t1.c1 = t2.c1 having cnt = 0) from t t1 -- Correct answer: [(0, 1, null), (0, 2, null), (1, 2, null)] +---+---+--+ |c1 |c2 |scalarsubquery(c1)| +---+---+--+ |0 |1 |null | |0 |1 |null | |0 |2 |null | |0 |2 |null | |1 |2 |null | |1 |2 |null | +---+---+--+ > RewriteCorrelatedScalarSubquery should handle duplicate attributes > -- > > Key: SPARK-43778 > URL: https://issues.apache.org/jira/browse/SPARK-43778 > Project: Spark > Issue Type: Bug > Components: SQL >Affects Versions: 3.4.0 >Reporter: Andrey Gubichev >Priority: Major > > This is a correctness problem caused by the fact that the decorrelation rule > does not dedup join attributes properly. This leads to the join on (c1 = c1), > which is simplified to True and the join becomes a cross product. > > Example query: > create view t(c1, c2) as values (0, 1), (0, 2), (1, 2); > select c1, c2, (select count(*) cnt from t t2 where t1.c1 = t2.c1 having cnt > = 0) from t t1 > – Correct answer: [(0, 1, null), (0, 2, null), (1, 2, null)] > {+}--{-}{-}{+}-{-}++{-}- > |c1|c2|scalarsubquery(c1)| > {+}--{-}{-}{+}-{-}++{-}- > |0|1|null| > |0|1|null| > |0|2|null| > |0|2|null| > |1|2|null| > |1|2|null| > {+}--{-}{-}{+}-{-}++{-}- > -- This message was sent by Atlassian Jira (v8.20.10#820010) - To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org For additional commands, e-mail: issues-h...@spark.apache.org