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From "Rahul Challapalli (JIRA)" <j...@apache.org>
Subject [jira] [Created] (DRILL-5149) Planner Optimization : Filter should get pushed into the sub-query
Date Wed, 21 Dec 2016 21:41:58 GMT
Rahul Challapalli created DRILL-5149:
----------------------------------------

             Summary: Planner Optimization : Filter should get pushed into the sub-query
                 Key: DRILL-5149
                 URL: https://issues.apache.org/jira/browse/DRILL-5149
             Project: Apache Drill
          Issue Type: Bug
          Components: Query Planning & Optimization
    Affects Versions: 1.10.0
            Reporter: Rahul Challapalli


git.commit.id.abbrev=cf2b7c7

The below plan can be optimized to push the filter into the subquery and also to eliminate
redundant projects
{code}
explain plan for select * from (select * from dfs.`/drill/testdata/resource-manager/5kwidecolumns_500k.tbl`
order by columns[0]) d where d.columns[0] = '4041054511';

00-00    Screen : rowType = RecordType(ANY *): rowcount = 1.436392845E7, cumulative cost =
{8.776360282950001E8 rows, 1.4059092422298168E10 cpu, 0.0 io, 1.96115503104E12 network, 1.532152368E9
memory}, id = 11452
00-01      Project(*=[$0]) : rowType = RecordType(ANY *): rowcount = 1.436392845E7, cumulative
cost = {8.7619963545E8 rows, 1.4057656029453169E10 cpu, 0.0 io, 1.96115503104E12 network,
1.532152368E9 memory}, id = 11451
00-02        SelectionVectorRemover : rowType = RecordType(ANY T18¦¦*): rowcount = 1.436392845E7,
cumulative cost = {8.7619963545E8 rows, 1.4057656029453169E10 cpu, 0.0 io, 1.96115503104E12
network, 1.532152368E9 memory}, id = 11450
00-03          Filter(condition=[=(ITEM(ITEM($0, 'columns'), 0), '4041054511')]) : rowType
= RecordType(ANY T18¦¦*): rowcount = 1.436392845E7, cumulative cost = {8.61835707E8 rows,
1.4043292101003168E10 cpu, 0.0 io, 1.96115503104E12 network, 1.532152368E9 memory}, id = 11449
00-04            Project(T18¦¦*=[$0]) : rowType = RecordType(ANY T18¦¦*): rowcount = 9.5759523E7,
cumulative cost = {7.66076184E8 rows, 1.3602798295203169E10 cpu, 0.0 io, 1.96115503104E12
network, 1.532152368E9 memory}, id = 11448
00-05              SingleMergeExchange(sort0=[1 ASC]) : rowType = RecordType(ANY T18¦¦*,
ANY EXPR$1): rowcount = 9.5759523E7, cumulative cost = {7.66076184E8 rows, 1.3602798295203169E10
cpu, 0.0 io, 1.96115503104E12 network, 1.532152368E9 memory}, id = 11447
01-01                SelectionVectorRemover : rowType = RecordType(ANY T18¦¦*, ANY EXPR$1):
rowcount = 9.5759523E7, cumulative cost = {6.70316661E8 rows, 1.2836722111203169E10 cpu, 0.0
io, 1.176693018624E12 network, 1.532152368E9 memory}, id = 11446
01-02                  Sort(sort0=[$1], dir0=[ASC]) : rowType = RecordType(ANY T18¦¦*, ANY
EXPR$1): rowcount = 9.5759523E7, cumulative cost = {5.74557138E8 rows, 1.2740962588203169E10
cpu, 0.0 io, 1.176693018624E12 network, 1.532152368E9 memory}, id = 11445
01-03                    Project(T18¦¦*=[$0], EXPR$1=[$1]) : rowType = RecordType(ANY T18¦¦*,
ANY EXPR$1): rowcount = 9.5759523E7, cumulative cost = {4.78797615E8 rows, 2.585507121E9 cpu,
0.0 io, 1.176693018624E12 network, 0.0 memory}, id = 11444
01-04                      HashToRandomExchange(dist0=[[$1]]) : rowType = RecordType(ANY T18¦¦*,
ANY EXPR$1, ANY E_X_P_R_H_A_S_H_F_I_E_L_D): rowcount = 9.5759523E7, cumulative cost = {4.78797615E8
rows, 2.585507121E9 cpu, 0.0 io, 1.176693018624E12 network, 0.0 memory}, id = 11443
02-01                        UnorderedMuxExchange : rowType = RecordType(ANY T18¦¦*, ANY
EXPR$1, ANY E_X_P_R_H_A_S_H_F_I_E_L_D): rowcount = 9.5759523E7, cumulative cost = {3.83038092E8
rows, 1.053354753E9 cpu, 0.0 io, 0.0 network, 0.0 memory}, id = 11442
03-01                          Project(T18¦¦*=[$0], EXPR$1=[$1], E_X_P_R_H_A_S_H_F_I_E_L_D=[hash32AsDouble($1)])
: rowType = RecordType(ANY T18¦¦*, ANY EXPR$1, ANY E_X_P_R_H_A_S_H_F_I_E_L_D): rowcount
= 9.5759523E7, cumulative cost = {2.87278569E8 rows, 9.5759523E8 cpu, 0.0 io, 0.0 network,
0.0 memory}, id = 11441
03-02                            Project(T18¦¦*=[$0], EXPR$1=[ITEM($1, 0)]) : rowType =
RecordType(ANY T18¦¦*, ANY EXPR$1): rowcount = 9.5759523E7, cumulative cost = {1.91519046E8
rows, 5.74557138E8 cpu, 0.0 io, 0.0 network, 0.0 memory}, id = 11440
03-03                              Project(T18¦¦*=[$0], columns=[$1]) : rowType = RecordType(ANY
T18¦¦*, ANY columns): rowcount = 9.5759523E7, cumulative cost = {9.5759523E7 rows, 1.91519046E8
cpu, 0.0 io, 0.0 network, 0.0 memory}, id = 11439
03-04                                Scan(groupscan=[EasyGroupScan [selectionRoot=maprfs:/drill/testdata/resource-manager/5kwidecolumns_500k.tbl,
numFiles=1, columns=[`*`], files=[maprfs:///drill/testdata/resource-manager/5kwidecolumns_500k.tbl]]])
: rowType = (DrillRecordRow[*, columns]): rowcount = 9.5759523E7, cumulative cost = {9.5759523E7
rows, 1.91519046E8 cpu, 0.0 io, 0.0 network, 0.0 memory}, id = 11438
{code}



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