$maxScan for limiting how much to scan SERVER-1015

1 files changed, 14 insertions, 0 deletions

diff --git a/jstests/maxscan.js b/jstests/maxscan.js
new file mode 100644
index 00000000000..c455efbf3ea
--- /dev/null
+++ b/jstests/maxscan.js
@@ -0,0 +1,14 @@
+
+t = db.maxscan;
+t.drop();
+
+N = 100;
+for ( i=0; i<N; i++ ){
+    t.insert( { _id : i , x : i % 10 } );
+}
+
+assert.eq( N , t.find().itcount() , "A" )
+assert.eq( 50 , t.find()._addSpecial( "$maxScan" , 50 ).itcount() , "B" )
+
+assert.eq( 10 , t.find( { x : 2 } ).itcount() , "C" )
+assert.eq( 5 , t.find( { x : 2 } )._addSpecial( "$maxScan" , 50 ).itcount() , "D" )