File: mr_outreduce2.js

package info (click to toggle)
mongodb 1%3A2.4.10-5
  • links: PTS, VCS
  • area: main
  • in suites: jessie-kfreebsd
  • size: 82,464 kB
  • sloc: cpp: 740,225; ansic: 152,098; sh: 13,820; python: 11,864; makefile: 1,012; perl: 922; pascal: 617; java: 452; lisp: 222; asm: 174
file content (27 lines) | stat: -rw-r--r-- 745 bytes parent folder | download | duplicates (4)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27

normal = "mr_outreduce2"
out = normal + "_out"

t = db[normal]
t.drop();

db[out].drop()

t.insert( { _id : 1 , x : 1 } )
t.insert( { _id : 2 , x : 1 } )
t.insert( { _id : 3 , x : 2 } )

m = function(){ emit( this.x , 1 ); }
r = function(k,v){ return Array.sum( v ); }

res = t.mapReduce( m , r , { out : { reduce : out } , query : { _id : { $gt : 0 } } } )

assert.eq( 2 , db[out].findOne( { _id : 1 } ).value , "A1" )
assert.eq( 1 , db[out].findOne( { _id : 2 } ).value , "A2" )


t.insert( { _id : 4 , x : 2 } )
res = t.mapReduce( m , r , { out : { reduce : out } , query : { _id : { $gt : 3 } } , finalize : null } )

assert.eq( 2 , db[out].findOne( { _id : 1 } ).value , "B1" )
assert.eq( 2 , db[out].findOne( { _id : 2 } ).value , "B2" )