// Test basic query stage index scan functionality.
t = db.stages_ixscan;
t.drop();
var collname = "stages_ixscan";

var N = 50;
for (var i = 0; i < N; ++i) {
    t.insert({foo: i, bar: N - i, baz: i});
}

t.ensureIndex({foo: 1});
t.ensureIndex({foo: 1, baz: 1});

// foo <= 20
ixscan1 = {ixscan: {args:{keyPattern:{foo: 1},
                          startKey: {"": 20},
                          endKey: {}, endKeyInclusive: true,
                          direction: -1}}};
res = db.runCommand({stageDebug: {collection: collname, plan: ixscan1}});
assert.eq(res.ok, 1);
assert.eq(res.results.length, 21);

// 20 <= foo < 30
ixscan1 = {ixscan: {args:{keyPattern:{foo: 1},
                          startKey: {"": 20},
                          endKey: {"" : 30}, endKeyInclusive: false,
                          direction: 1}}};
res = db.runCommand({stageDebug: {collection: collname, plan: ixscan1}});
assert.eq(res.ok, 1);
assert.eq(res.results.length, 10);

// 20 <= foo <= 30
ixscan1 = {ixscan: {args:{keyPattern:{foo: 1},
                          startKey: {"": 20},
                          endKey: {"" : 30}, endKeyInclusive: true,
                          direction: 1}}};
res = db.runCommand({stageDebug: {collection: collname, plan: ixscan1}});
assert.eq(res.ok, 1);
assert.eq(res.results.length, 11);

// 20 <= foo <= 30
// foo == 25
ixscan1 = {ixscan: {args:{keyPattern:{foo: 1},
                          startKey: {"": 20},
                          endKey: {"" : 30}, endKeyInclusive: true,
                          direction: 1},
                    filter: {foo: 25}}};
res = db.runCommand({stageDebug: {collection: collname, plan: ixscan1}});
assert.eq(res.ok, 1);
assert.eq(res.results.length, 1);

// 20 <= foo <= 30
// baz == 25 (in index so we can match against it.)
ixscan1 = {ixscan: {args:{keyPattern:{foo:1, baz: 1},
                          startKey: {foo: 20, baz: MinKey},
                          endKey: {foo: 30, baz: MaxKey}, endKeyInclusive: true,
                          direction: 1},
                    filter: {baz: 25}}};
res = db.runCommand({stageDebug: {collection: collname, plan: ixscan1}});
assert.eq(res.ok, 1);
assert.eq(res.results.length, 1);

// 20 <= foo <= 30
// bar == 25 (not covered, should error.)
ixscan1 = {ixscan: {args:{keyPattern:{foo:1, baz: 1},
                          startKey: {foo: 20, baz: MinKey},
                          endKey: {foo: 30, baz: MaxKey}, endKeyInclusive: true,
                          direction: 1},
                    filter: {bar: 25}}};
res = db.runCommand({stageDebug: {collection: collname, plan: ixscan1}});
assert.eq(res.ok, 0);