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
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
|
// Check that a warning message about doing a capped collection scan for a query with an _id
// constraint is printed at appropriate times. SERVER-5353
function numWarnings() {
logs = db.adminCommand( { getLog:"global" } ).log
ret = 0;
logs.forEach( function( x ) {
if ( x.match( warningMatchRegexp ) ) {
++ret;
}
} );
return ret;
}
collectionNameIndex = 0;
// Generate a collection name not already present in the log.
do {
testCollectionName = 'jstests_queryoptimizera__' + collectionNameIndex++;
warningMatchString = 'unindexed _id query on capped collection.*collection: test.' +
testCollectionName;
warningMatchRegexp = new RegExp( warningMatchString );
} while( numWarnings() > 0 );
t = db[ testCollectionName ];
t.drop();
notCappedCollectionName = testCollectionName + '_notCapped';
notCapped = db[ notCappedCollectionName ];
notCapped.drop();
db.createCollection( testCollectionName, { capped:true, size:1000 } );
db.createCollection( notCappedCollectionName, { autoIndexId:false } );
t.insert( {} );
notCapped.insert( {} );
oldNumWarnings = 0;
function assertNoNewWarnings() {
assert.eq( oldNumWarnings, numWarnings() );
}
function assertNewWarning() {
newNumWarnings = numWarnings();
// Ensure that newNumWarnings > oldNumWarnings. It's not safe to test that oldNumWarnings + 1
// == newNumWarnings, because a (simulated) page fault exception may cause multiple messages to
// be logged instead of only one.
assert.lt( oldNumWarnings, newNumWarnings );
oldNumWarnings = newNumWarnings;
}
// Simple _id query
t.find( { _id:0 } ).itcount();
assertNoNewWarnings();
// Simple _id query without an _id index, on a non capped collection.
notCapped.find( { _id:0 } ).itcount();
assertNoNewWarnings();
// A multi field query, including _id.
t.find( { _id:0, a:0 } ).itcount();
assertNoNewWarnings();
// An unsatisfiable query.
t.find( { _id:0, a:{$in:[]} } ).itcount();
assertNoNewWarnings();
// An hinted query.
t.find( { _id:0 } ).hint( { $natural:1 } ).itcount();
assertNoNewWarnings();
// Retry a multi field query.
t.find( { _id:0, a:0 } ).itcount();
assertNoNewWarnings();
// Warnings should not be printed when an index is added on _id.
t.ensureIndex( { _id:1 } );
t.find( { _id:0 } ).itcount();
assertNoNewWarnings();
t.find( { _id:0, a:0 } ).itcount();
assertNoNewWarnings();
t.find( { _id:0, a:0 } ).itcount();
assertNoNewWarnings();
t.drop(); // cleanup
notCapped.drop();
|
