Details
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Improvement
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Status: Open
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Minor
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Resolution: Unresolved
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any
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None
Description
There are cases when the ex_conv_clause::findInstruction() is called to get the index into the convInstrInfo[] array. The method then linearly searches the array (currently 402 elements). E.g., the following upsert statement (to insert 1 million rows), findInstruction() was called ~13 million times.
Propose going through the convInstrInfo array at process startup and create an index, then use that to avoid the linear search.
------ Begin example statement -----
drop schema hbase_table;
create schema hbase_table;
set schema hbase_table;
create table source1 (a int not null primary key) salt using 8 partitions ;
insert into source1 select x1 from (values(1)) as t1 transpose 0,1,2,3,4,5,6,7,8,9 as x1;
create table source2 (a char(128) not null primary key) salt using 8 partitions ;
insert into source2 values('abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvw\
xyzabcdefghijklmnopqrstuvwx');
drop table t106;
create table t106
(uniq int not null,
c100k int,
c10K int ,
c1K int,
c100 int,
c10 int,
c1 int,
char_col1 char(128),
char_col2 char(128),
char_col3 char(128),
char_col4 char(128),
char_col5 char(128),
char_col6 char(128),
char_col7 char(128),
char_col8 char(128),
primary key (uniq)
)
salt using 8 partitions;
;
cqd parallel_num_esps '1';
cqd upd_ordered 'off' ;
prepare s1 from
upsert using load into t106
select
0 + (1000000 * x1000000) + (100000 * x100000) + (10000 * x10000) + (1000 * x1000)
+ (100 * x100) +( 10 * x10) + (1 * x1),
0 + (100000 * x100000) + (10000 * x10000) + (1000 * x1000) + (100 * x100)
+ (10 * x10) +( 1 * x1),
0 + (1000 * x1000) + (100 * x100) + (10 * x10) + (1 * x1),
0 + (100 * x100) + (10 * x10) + (1 * x1),
0 + (10 * x10) + (1 * x1),
0 + (1 * x1),
0 ,
x2 ,
x2 ,
x2 ,
x2 ,
x2 ,
x2 ,
x2 ,
x2
from (select a from source1) as s1(x1), (select a from source2) as s2(x2)
transpose 0 as x1000000
transpose 0,1,2,3,4,5,6,7,8,9 as x100000
transpose 0,1,2,3,4,5,6,7,8,9 as x10000
transpose 0,1,2,3,4,5,6,7,8,9 as x1000
transpose 0,1,2,3,4,5,6,7,8,9 as x100
transpose 0,1,2,3,4,5,6,7,8,9 as x10
;
execute s1;
------ End example -----
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