21 lines
No EOL
555 B
JavaScript
21 lines
No EOL
555 B
JavaScript
// An in order index is picked over a scan and order index when the in order index has sufficient
|
|
// matches to be picked, see discussion in SERVER-4150.
|
|
|
|
t = db.jstests_sorth;
|
|
t.drop();
|
|
|
|
t.ensureIndex( {a:1} );
|
|
t.ensureIndex( {b:1} );
|
|
|
|
function checkIndex( index, n ) {
|
|
t.remove();
|
|
for( i = 0; i < n; ++i ) {
|
|
t.save( {a:i%2,b:i} );
|
|
}
|
|
explain = t.find( {a:0,b:{$gte:0}} ).sort( {b:1} ).explain( true );
|
|
assert.eq( index, explain.cursor );
|
|
}
|
|
|
|
checkIndex( "BtreeCursor a_1", 100 );
|
|
checkIndex( "BtreeCursor b_1", 500 );
|
|
t.drop(); |