You are viewing a plain text version of this content. The canonical link for it is here.
Posted to issues@hive.apache.org by "Gopal V (JIRA)" <ji...@apache.org> on 2016/02/19 23:28:18 UTC
[jira] [Updated] (HIVE-13102) CBO: Reduce operations in Calcite do
not fold as tight as rule-based folding
[ https://issues.apache.org/jira/browse/HIVE-13102?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Gopal V updated HIVE-13102:
---------------------------
Priority: Minor (was: Major)
> CBO: Reduce operations in Calcite do not fold as tight as rule-based folding
> ----------------------------------------------------------------------------
>
> Key: HIVE-13102
> URL: https://issues.apache.org/jira/browse/HIVE-13102
> Project: Hive
> Issue Type: Improvement
> Components: CBO
> Affects Versions: 2.1.0
> Reporter: Gopal V
> Assignee: Jesus Camacho Rodriguez
> Priority: Minor
>
> With CBO
> {code}
> create temporary table table1(id int, val int, val1 int, dimid int);
> create temporary table table3(id int, val int, val1 int);
> hive> explain select table1.id, table1.val, table1.val1 from table1 inner join table3 on table1.dimid = table3.id and table3.id = 1 where table1.dimid <>1 ;
> Warning: Map Join MAPJOIN[14][bigTable=?] in task 'Map 1' is a cross product
> OK
> Plan optimized by CBO.
> Vertex dependency in root stage
> Map 1 <- Map 2 (BROADCAST_EDGE)
> Stage-0
> Fetch Operator
> limit:-1
> Stage-1
> Map 1 llap
> File Output Operator [FS_11]
> Map Join Operator [MAPJOIN_14] (rows=1 width=0)
> Conds:(Inner),Output:["_col0","_col1","_col2"]
> <-Map 2 [BROADCAST_EDGE] llap
> BROADCAST [RS_8]
> Select Operator [SEL_5] (rows=1 width=0)
> Filter Operator [FIL_13] (rows=1 width=0)
> predicate:(id = 1)
> TableScan [TS_3] (rows=1 width=0)
> default@table3,table3,Tbl:PARTIAL,Col:NONE,Output:["id"]
> <-Select Operator [SEL_2] (rows=1 width=0)
> Output:["_col0","_col1","_col2"]
> Filter Operator [FIL_12] (rows=1 width=0)
> predicate:((dimid = 1) and (dimid <> 1))
> TableScan [TS_0] (rows=1 width=0)
> default@table1,table1,Tbl:PARTIAL,Col:NONE,Output:["id","val","val1","dimid"]
> {code}
> without CBO
> {code}
> hive> explain select table1.id, table1.val, table1.val1 from table1 inner join table3 on table1.dimid = table3.id and table3.id = 1 where table1.dimid <>1 ;
> OK
> Vertex dependency in root stage
> Map 1 <- Map 2 (BROADCAST_EDGE)
> Stage-0
> Fetch Operator
> limit:-1
> Stage-1
> Map 1 llap
> File Output Operator [FS_9]
> Map Join Operator [MAPJOIN_14] (rows=1 width=0)
> Conds:FIL_12.1=RS_17.1(Inner),Output:["_col0","_col1","_col2"]
> <-Map 2 [BROADCAST_EDGE] vectorized, llap
> BROADCAST [RS_17]
> PartitionCols:1
> Filter Operator [FIL_16] (rows=1 width=0)
> predicate:false
> TableScan [TS_1] (rows=1 width=0)
> default@table3,table3,Tbl:PARTIAL,Col:COMPLETE
> <-Filter Operator [FIL_12] (rows=1 width=0)
> predicate:false
> TableScan [TS_0] (rows=1 width=0)
> default@table1,table1,Tbl:PARTIAL,Col:NONE,Output:["id","val","val1"]
> Time taken: 0.044 seconds, Fetched: 23 row(s)
> {code}
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)