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Posted to issues@spark.apache.org by "Min Qiu (JIRA)" <ji...@apache.org> on 2015/12/03 02:31:11 UTC
[jira] [Updated] (SPARK-12114) ColumnPruning rule fails in case of
"Project <- Filter <- Join"
[ https://issues.apache.org/jira/browse/SPARK-12114?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Min Qiu updated SPARK-12114:
----------------------------
External issue URL: https://github.com/apache/spark/pull/10087
> ColumnPruning rule fails in case of "Project <- Filter <- Join"
> ---------------------------------------------------------------
>
> Key: SPARK-12114
> URL: https://issues.apache.org/jira/browse/SPARK-12114
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Reporter: Min Qiu
>
> For the query
> {quote}
> SELECT c_name, c_custkey, o_orderkey, o_orderdate,
> o_totalprice, sum(l_quantity)
> FROM customer join orders join lineitem
> on c_custkey = o_custkey AND o_orderkey = l_orderkey
> left outer join (SELECT l_orderkey tmp_orderkey
> FROM lineitem
> GROUP BY l_orderkey
> HAVING sum(l_quantity) > 300) tmp
> on o_orderkey = tmp_orderkey
> WHERE tmp_orderkey IS NOT NULL
> GROUP BY c_name, c_custkey, o_orderkey, o_orderdate, o_totalprice
> ORDER BY o_totalprice DESC, o_orderdate
> {quote}
> The optimizedPlan is
> {quote}
> Sort \[o_totalprice#48 DESC,o_orderdate#49 ASC]
>
> Aggregate \[c_name#38,c_custkey#37,o_orderkey#45,o_orderdate#49,o_totalprice#48], \[c_name#38,c_custkey#37,o_orderkey#45, o_orderdate#49,o_totalprice#48,SUM(l_quantity#58) AS _c5#36]
> {color: green}Project \[c_name#38,o_orderdate#49,c_custkey#37,o_orderkey#45,o_totalprice#48,l_quantity#58]
> Filter IS NOT NULL tmp_orderkey#35
> Join LeftOuter, Some((o_orderkey#45 = tmp_orderkey#35)){color}
> Join Inner, Some((c_custkey#37 = o_custkey#46))
> MetastoreRelation default, customer, None
> Join Inner, Some((o_orderkey#45 = l_orderkey#54))
> MetastoreRelation default, orders, None
> MetastoreRelation default, lineitem, None
> Project \[tmp_orderkey#35]
> Filter havingCondition#86
> Aggregate \[l_orderkey#70], \[(SUM(l_quantity#74) > 300.0) AS havingCondition#86,l_orderkey#70 AS tmp_orderkey#35]
> Project \[l_orderkey#70,l_quantity#74]
> MetastoreRelation default, lineitem, None
> {quote}
> Due to the pattern highlighted in green that the ColumnPruning rule fails to deal with, all columns of lineitem and orders tables are scanned. The unneeded columns are also involved in the data Shuffling. The performance is extremely bad if any one of the two tables is big.
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