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https://issues.apache.org/jira/browse/SPARK-23405?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16375985#comment-16375985
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KaiXinXIaoLei commented on SPARK-23405:
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i run `select ls.cs_order_number from ls left semi join catalog_sales cs on
ls.cs_order_number = cs.cs_order_number`, the Optimized Logical Plan is :
== Optimized Logical Plan ==
Join LeftSemi, (cs_order_number#1 = cs_order_number#22)
:- Project [cs_order_number#1]
: +- Filter isnotnull(cs_order_number#1)
: +- MetastoreRelation 100t, ls
+- Project [cs_order_number#22]
+-Relation[cs_sold_date_sk#5,cs_sold_time_sk#6,cs_ship_date_sk#7,cs_bill_customer_sk#8,cs_bill_cdemo_sk#9,cs_bill_hdemo_sk#10,cs_bill_addr_sk#11,cs_ship_customer_sk#12,cs_ship_cdemo_sk#13,cs_ship_hdemo_sk#14,cs_ship_addr_sk#15,cs_call_center_sk#16,cs_catalog_page_sk#17,cs_ship_mod
I think the Optimized Logical Plan should be:
== Optimized Logical Plan ==
Join LeftSemi, (cs_order_number#1 = cs_order_number#22)
:- Project [cs_order_number#1]
: +- Filter isnotnull(cs_order_number#1)
: +- MetastoreRelation 100t, ls
+- Project [cs_order_number#22]
{color:#FF0000}+- Filter isnotnull(cs_order_number#22){color}
+-
Relation[cs_sold_date_sk#5,cs_sold_time_sk#6,cs_ship_date_sk#7,cs_bill_customer_sk#8,cs_bill_cdemo_sk#9,cs_bill_hdemo_sk#10,cs_bill_addr_sk#11,cs_ship_customer_sk#12,cs_ship_cdemo_sk#13,cs_ship_hdemo_sk#14,cs_ship_addr_sk#15,cs_call_
> The task will hang up when a small table left semi join a big table
> -------------------------------------------------------------------
>
> Key: SPARK-23405
> URL: https://issues.apache.org/jira/browse/SPARK-23405
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 2.2.1
> Reporter: KaiXinXIaoLei
> Priority: Major
> Attachments: SQL.png, taskhang up.png
>
>
> # I run a sql: `select ls.cs_order_number from ls left semi join
> catalog_sales cs on ls.cs_order_number = cs.cs_order_number`, The `ls` table
> is a small table ,and the number is one. The `catalog_sales` table is a big
> table, and the number is 10 billion. The task will be hang up:
> !taskhang up.png!
> And the sql page is :
> !SQL.png!
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