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
28
29
30
31
32
33
34
35
36
37
38
39
40
41
|
t = db.index_check2;
t.drop();
for ( var i=0; i<1000; i++ ){
var a = [];
for ( var j=1; j<5; j++ ){
a.push( "tag" + ( i * j % 50 ));
}
t.save( { num : i , tags : a } );
}
q1 = { tags : "tag6" };
q2 = { tags : "tag12" };
q3 = { tags : { $all : [ "tag6" , "tag12" ] } }
assert.eq( 120 , t.find( q1 ).itcount() , "q1 a");
assert.eq( 120 , t.find( q2 ).itcount() , "q2 a" );
assert.eq( 60 , t.find( q3 ).itcount() , "q3 a");
t.ensureIndex( { tags : 1 } );
assert.eq( 120 , t.find( q1 ).itcount() , "q1 a");
assert.eq( 120 , t.find( q2 ).itcount() , "q2 a" );
assert.eq( 60 , t.find( q3 ).itcount() , "q3 a");
assert.eq( "BtreeCursor tags_1" , t.find( q1 ).explain().cursor , "e1" );
assert.eq( "BtreeCursor tags_1" , t.find( q2 ).explain().cursor , "e2" );
assert.eq( "BtreeCursor tags_1" , t.find( q3 ).explain().cursor , "e3" );
scanned1 = t.find(q1).explain().nscanned;
scanned2 = t.find(q2).explain().nscanned;
scanned3 = t.find(q3).explain().nscanned;
//print( "scanned1: " + scanned1 + " scanned2: " + scanned2 + " scanned3: " + scanned3 );
// $all should just iterate either of the words
assert( scanned3 <= Math.max( scanned1 , scanned2 ) , "$all makes query optimizer not work well" );
exp3 = t.find( q3 ).explain();
assert.eq( exp3.indexBounds.tags[0][0], exp3.indexBounds.tags[0][1], "$all range not a single key" );
|
