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// Test SERVER-14306. Do a query directly against a mongod with an in-memory sort and a limit that
// doesn't cause the in-memory sort limit to be reached, then make sure the same limit also doesn't
// cause the in-memory sort limit to be reached when running through a mongos.
(function() {
"use strict";
var st = new ShardingTest({shards: 2});
var db = st.s.getDB('test');
var mongosCol = db.getCollection('skip');
db.adminCommand({enableSharding: 'test'});
st.ensurePrimaryShard('test', 'shard0001');
db.adminCommand({shardCollection: 'test.skip', key: {_id: 1}});
var filler = new Array(10000).toString();
var bulk = [];
// create enough data to exceed 32MB in-memory sort limit.
for (var i = 0; i < 20000; i++) {
bulk.push({x: i, str: filler});
}
assert.writeOK(mongosCol.insert(bulk));
// Make sure that at least 1 chunk is on another shard so that mongos doesn't treat this as a
// single-shard query (which doesn't exercise the bug).
st.startBalancer();
st.awaitBalance('skip', 'test');
var docCount = mongosCol.count();
var shardCol = st.shard0.getDB('test').getCollection('skip');
var passLimit = 2000;
var failLimit = 4000;
jsTestLog("Test no error with limit of " + passLimit + " on mongod");
assert.eq(passLimit, shardCol.find().sort({x: 1}).limit(passLimit).itcount());
jsTestLog("Test error with limit of " + failLimit + " on mongod");
assert.throws(function() {
shardCol.find().sort({x: 1}).limit(failLimit).itcount();
});
jsTestLog("Test no error with limit of " + passLimit + " on mongos");
assert.eq(passLimit, mongosCol.find().sort({x: 1}).limit(passLimit).itcount());
jsTestLog("Test error with limit of " + failLimit + " on mongos");
assert.throws(function() {
mongosCol.find().sort({x: 1}).limit(failLimit).itcount();
});
st.stop();
})();
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