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/**
* Tests that a sharded query targeted to a single shard will use passed-in skip.
*/
var st = new ShardingTest({ shards : 2, mongos : 1});
var mongos = st.s0;
var shards = mongos.getDB( "config" ).shards.find().toArray();
var admin = mongos.getDB( "admin" );
var collSharded = mongos.getCollection( "testdb.collSharded" );
var collUnSharded = mongos.getCollection( "testdb.collUnSharded" );
// Set up a sharded and unsharded collection
assert( admin.runCommand({ enableSharding : collSharded.getDB() + "" }).ok );
printjson( admin.runCommand({ movePrimary : collSharded.getDB() + "", to : shards[0]._id }) );
assert( admin.runCommand({ shardCollection : collSharded + "", key : { _id : 1 } }).ok );
assert( admin.runCommand({ split : collSharded + "", middle : { _id : 0 } }).ok );
assert( admin.runCommand({ moveChunk : collSharded + "",
find : { _id : 0 },
to : shards[1]._id }).ok );
function testSelectWithSkip(coll){
for (var i = -100; i < 100; i++) {
assert.writeOK(coll.insert({ _id : i }));
}
// Run a query which only requires 5 results from a single shard
var explain = coll.find({ _id : { $gt : 1 }}).sort({ _id : 1 })
.skip(90)
.limit(5)
.explain("executionStats");
assert.lt(explain.executionStats.nReturned, 90);
}
testSelectWithSkip(collSharded);
testSelectWithSkip(collUnSharded);
jsTest.log("DONE!");
st.stop();
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