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https://issues.apache.org/jira/browse/SPARK-30876?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17161616#comment-17161616
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Apache Spark commented on SPARK-30876:
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User 'navinvishy' has created a pull request for this issue:
https://github.com/apache/spark/pull/29170
> Optimizer cannot infer from inferred constraints with join
> ----------------------------------------------------------
>
> Key: SPARK-30876
> URL: https://issues.apache.org/jira/browse/SPARK-30876
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 3.1.0
> Reporter: Yuming Wang
> Priority: Major
>
> How to reproduce this issue:
> {code:sql}
> create table t1(a int, b int, c int);
> create table t2(a int, b int, c int);
> create table t3(a int, b int, c int);
> select count(*) from t1 join t2 join t3 on (t1.a = t2.b and t2.b = t3.c and
> t3.c = 1);
> {code}
> Spark 2.3+:
> {noformat}
> == Physical Plan ==
> *(4) HashAggregate(keys=[], functions=[count(1)])
> +- Exchange SinglePartition, true, [id=#102]
> +- *(3) HashAggregate(keys=[], functions=[partial_count(1)])
> +- *(3) Project
> +- *(3) BroadcastHashJoin [b#10], [c#14], Inner, BuildRight
> :- *(3) Project [b#10]
> : +- *(3) BroadcastHashJoin [a#6], [b#10], Inner, BuildRight
> : :- *(3) Project [a#6]
> : : +- *(3) Filter isnotnull(a#6)
> : : +- *(3) ColumnarToRow
> : : +- FileScan parquet default.t1[a#6] Batched: true,
> DataFilters: [isnotnull(a#6)], Format: Parquet, Location:
> InMemoryFileIndex[file:/Users/yumwang/Downloads/spark-3.0.0-preview2-bin-hadoop2.7/spark-warehous...,
> PartitionFilters: [], PushedFilters: [IsNotNull(a)], ReadSchema:
> struct<a:int>
> : +- BroadcastExchange
> HashedRelationBroadcastMode(List(cast(input[0, int, true] as bigint))),
> [id=#87]
> : +- *(1) Project [b#10]
> : +- *(1) Filter (isnotnull(b#10) AND (b#10 = 1))
> : +- *(1) ColumnarToRow
> : +- FileScan parquet default.t2[b#10] Batched:
> true, DataFilters: [isnotnull(b#10), (b#10 = 1)], Format: Parquet, Location:
> InMemoryFileIndex[file:/Users/yumwang/Downloads/spark-3.0.0-preview2-bin-hadoop2.7/spark-warehous...,
> PartitionFilters: [], PushedFilters: [IsNotNull(b), EqualTo(b,1)],
> ReadSchema: struct<b:int>
> +- BroadcastExchange
> HashedRelationBroadcastMode(List(cast(input[0, int, true] as bigint))),
> [id=#96]
> +- *(2) Project [c#14]
> +- *(2) Filter (isnotnull(c#14) AND (c#14 = 1))
> +- *(2) ColumnarToRow
> +- FileScan parquet default.t3[c#14] Batched: true,
> DataFilters: [isnotnull(c#14), (c#14 = 1)], Format: Parquet, Location:
> InMemoryFileIndex[file:/Users/yumwang/Downloads/spark-3.0.0-preview2-bin-hadoop2.7/spark-warehous...,
> PartitionFilters: [], PushedFilters: [IsNotNull(c), EqualTo(c,1)],
> ReadSchema: struct<c:int>
> Time taken: 3.785 seconds, Fetched 1 row(s)
> {noformat}
> Spark 2.2.x:
> {noformat}
> == Physical Plan ==
> *HashAggregate(keys=[], functions=[count(1)])
> +- Exchange SinglePartition
> +- *HashAggregate(keys=[], functions=[partial_count(1)])
> +- *Project
> +- *SortMergeJoin [b#19], [c#23], Inner
> :- *Project [b#19]
> : +- *SortMergeJoin [a#15], [b#19], Inner
> : :- *Sort [a#15 ASC NULLS FIRST], false, 0
> : : +- Exchange hashpartitioning(a#15, 200)
> : : +- *Filter (isnotnull(a#15) && (a#15 = 1))
> : : +- HiveTableScan [a#15], HiveTableRelation
> `default`.`t1`, org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe, [a#15,
> b#16, c#17]
> : +- *Sort [b#19 ASC NULLS FIRST], false, 0
> : +- Exchange hashpartitioning(b#19, 200)
> : +- *Filter (isnotnull(b#19) && (b#19 = 1))
> : +- HiveTableScan [b#19], HiveTableRelation
> `default`.`t2`, org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe, [a#18,
> b#19, c#20]
> +- *Sort [c#23 ASC NULLS FIRST], false, 0
> +- Exchange hashpartitioning(c#23, 200)
> +- *Filter (isnotnull(c#23) && (c#23 = 1))
> +- HiveTableScan [c#23], HiveTableRelation
> `default`.`t3`, org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe, [a#21,
> b#22, c#23]
> Time taken: 0.728 seconds, Fetched 1 row(s)
> {noformat}
> Spark 2.2 can infer {{(a#15 = 1)}}, but Spark 2.3+ can't.
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