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t = db.distinct_index2;
t.drop();
t.createIndex({a: 1, b: 1});
t.createIndex({c: 1});
// Uniformly distributed dataset.
// If we use a randomly generated dataset, we might not
// generate all the distinct values in the range [0, 10).
for (var a = 0; a < 10; a++) {
for (var b = 0; b < 10; b++) {
for (var c = 0; c < 10; c++) {
t.insert({a: a, b: b, c: c});
}
}
}
correct = [];
for (i = 0; i < 10; i++)
correct.push(i);
function check(field) {
res = t.distinct(field);
res = res.sort();
assert.eq(correct, res, "check: " + field);
if (field != "a") {
res = t.distinct(field, {a: 1});
res = res.sort();
assert.eq(correct, res, "check 2: " + field);
}
}
check("a");
check("b");
check("c");
// hashed index should produce same results.
t.dropIndexes();
t.createIndex({a: "hashed"});
check("a");
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