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t = db.index_elemmatch1;
t.drop();
x = 0;
y = 0;
var bulk = t.initializeUnorderedBulkOp();
for ( a=0; a<100; a++ ){
for ( b=0; b<100; b++ ){
bulk.insert( { a : a , b : b % 10 , arr : [ { x : x++ % 10 , y : y++ % 10 } ] } );
}
}
assert.writeOK(bulk.execute());
t.ensureIndex( { a : 1 , b : 1 } );
t.ensureIndex( { "arr.x" : 1 , a : 1 } );
assert.eq( 100 , t.find( { a : 55 } ).itcount() , "A1" );
assert.eq( 10 , t.find( { a : 55 , b : 7 } ).itcount() , "A2" );
q = { a : 55 , b : { $in : [ 1 , 5 , 8 ] } };
assert.eq( 30 , t.find( q ).itcount() , "A3" );
q.arr = { $elemMatch : { x : 5 , y : 5 } };
assert.eq( 10 , t.find( q ).itcount() , "A4" );
function nscannedForCursor( explain, cursor ) {
plans = explain.allPlans;
for( i in plans ) {
if ( plans[ i ].cursor == cursor ) {
return plans[ i ].nscanned;
}
}
return -1;
}
var explain = t.find(q).hint( { "arr.x" : 1 , a : 1 } ).explain("executionStats");
assert.eq( t.find(q).itcount(), explain.executionStats.totalKeysExamined );
printjson(t.find(q).explain());
print("Num results:");
assert.eq(10, t.find(q).itcount());
printjson(t.find(q).itcount());
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