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/**
* Test the input/output behavior of some predicates on time-series collections.
*
* @tags: [
* # This test depends on certain writes ending up in the same bucket. Stepdowns may result in
* # writes splitting between two primaries, and thus different buckets.
* does_not_support_stepdowns,
* # We need a timeseries collection.
* requires_timeseries,
* ]
*/
(function() {
"use strict";
load("jstests/core/timeseries/libs/timeseries.js");
const coll = db.timeseries_predicates_normal;
const tsColl = db.timeseries_predicates_timeseries;
coll.drop();
tsColl.drop();
assert.commandWorked(
db.createCollection(tsColl.getName(), {timeseries: {timeField: 'time', metaField: 'meta'}}));
const bucketsColl = db.getCollection('system.buckets.' + tsColl.getName());
// Test that 'predicate' behaves correctly on the example documents,
// by comparing the result on a time-series collection against a normal collection.
function checkPredicateResult(predicate, documents) {
assert.commandWorked(coll.deleteMany({}));
assert.commandWorked(bucketsColl.deleteMany({}));
assert.commandWorked(coll.insert(documents));
assert.commandWorked(tsColl.insert(documents));
const normalResult = coll.aggregate({$match: predicate}).toArray();
const tsResult = tsColl.aggregate({$match: predicate}).toArray();
assert.sameMembers(normalResult, tsResult);
}
// Test that 'predicate' behaves correctly, no matter how the documents are bucketed:
// insert the documents with different combinations of metadata to change how they are bucketed.
// 'documents' should be small, since this runs 2^N tests.
function checkAllBucketings(predicate, documents) {
for (const doc of documents) {
doc._id = ObjectId();
doc.time = doc.time || ISODate();
}
// For N documents, there are 2^N ways to assign them to buckets A and B.
const numDocs = documents.length;
const numBucketings = 1 << numDocs;
for (let bucketing = 0; bucketing < numBucketings; ++bucketing) {
// The ith bit tells you how to assign documents[i].
const labeledDocs = documents.map(
(doc, i) => Object.merge(doc, {meta: {bucket: bucketing & (1 << i)}}, true /*deep*/));
checkPredicateResult(predicate, labeledDocs);
}
}
// Test $in...
{
// ... with a simple list of equalities.
checkAllBucketings({x: {$in: [2, 3, 4]}}, [
{x: 1},
{x: 2},
{x: 3},
{x: 42},
]);
// ... with equalities which contain an array.
checkAllBucketings({x: {$in: [1, [2, 3, 4], 5]}}, [
{},
{x: 1},
{x: 2},
{x: [2, 3]},
{x: [2, 3, 4]},
{x: 5},
{x: 42},
]);
}
// $exists: true
checkAllBucketings({x: {$exists: true}}, [
{},
{x: 2},
{x: ISODate()},
{x: null},
{x: undefined},
]);
// Test $or...
{
// ... on metric + meta.
checkAllBucketings({
$or: [
{x: {$lt: 0}},
{'meta.y': {$gt: 0}},
]
},
[
{x: +1, meta: {y: -1}},
{x: +1, meta: {y: +1}},
{x: -1, meta: {y: -1}},
{x: -1, meta: {y: +1}},
]);
// ... when one argument can't be pushed down.
checkAllBucketings({
$or: [
{x: {$lt: 0}},
{y: {$exists: false}},
]
},
[
{x: -1},
{x: +1},
{x: -1, y: 'asdf'},
{x: +1, y: 'asdf'},
]);
// ... when neither argument can be pushed down.
checkAllBucketings({
$or: [
{x: {$exists: false}},
{y: {$exists: false}},
]
},
[
{},
{x: 'qwer'},
{y: 'asdf'},
{x: 'qwer', y: 'asdf'},
]);
}
// Test $and...
{
// ... on metric + meta.
checkAllBucketings({
$and: [
{x: {$lt: 0}},
{'meta.y': {$gt: 0}},
]
},
[
{x: +1, meta: {y: -1}},
{x: +1, meta: {y: +1}},
{x: -1, meta: {y: -1}},
{x: -1, meta: {y: +1}},
]);
// ... when one argument can't be pushed down.
checkAllBucketings({
$and: [
{x: {$lt: 0}},
{y: {$exists: false}},
]
},
[
{x: -1},
{x: +1},
{x: -1, y: 'asdf'},
{x: +1, y: 'asdf'},
]);
// ... when neither argument can be pushed down.
checkAllBucketings({
$and: [
{x: {$exists: false}},
{y: {$exists: false}},
]
},
[
{},
{x: 'qwer'},
{y: 'asdf'},
{x: 'qwer', y: 'asdf'},
]);
}
// Test nested $and / $or.
checkAllBucketings({
// The top-level $or prevents us from splitting into 2 top-level $match stages.
$or: [
{
$and: [
{'meta.a': {$gt: 0}},
{'x': {$lt: 0}},
]
},
{
$and: [
{'meta.b': {$gte: 0}},
{time: {$gt: ISODate('2020-01-01')}},
]
},
]
},
[
{meta: {a: -1, b: -1}, x: -1, time: ISODate('2020-02-01')},
{meta: {a: -1, b: -1}, x: -1, time: ISODate('2019-12-31')},
{meta: {a: -1, b: -1}, x: +1, time: ISODate('2020-02-01')},
{meta: {a: -1, b: -1}, x: +1, time: ISODate('2019-12-31')},
{meta: {a: +1, b: -1}, x: -1, time: ISODate('2020-02-01')},
{meta: {a: +1, b: -1}, x: -1, time: ISODate('2019-12-31')},
{meta: {a: +1, b: -1}, x: +1, time: ISODate('2020-02-01')},
{meta: {a: +1, b: -1}, x: +1, time: ISODate('2019-12-31')},
]);
// Test nested $and / $or where some leaf predicates cannot be pushed down.
checkAllBucketings({
$or: [
{
$and: [
{'meta.a': {$gt: 0}},
{'x': {$exists: false}},
]
},
{
$and: [
{'meta.b': {$gte: 0}},
{time: {$gt: ISODate('2020-01-01')}},
]
},
]
},
[
{meta: {a: -1, b: -1}, time: ISODate('2020-02-01')},
{meta: {a: -1, b: -1}, time: ISODate('2019-12-31')},
{meta: {a: -1, b: -1}, x: 'asdf', time: ISODate('2020-02-01')},
{meta: {a: -1, b: -1}, x: 'asdf', time: ISODate('2019-12-31')},
{meta: {a: +1, b: -1}, time: ISODate('2020-02-01')},
{meta: {a: +1, b: -1}, time: ISODate('2019-12-31')},
{meta: {a: +1, b: -1}, x: 'asdf', time: ISODate('2020-02-01')},
{meta: {a: +1, b: -1}, x: 'asdf', time: ISODate('2019-12-31')},
]);
// Test $exists on meta, inside $or.
checkAllBucketings({
$or: [
{"meta.a": {$exists: true}},
{"x": {$gt: 2}},
]
},
[
{meta: {a: 1}, x: 1},
{meta: {a: 2}, x: 2},
{meta: {a: 3}, x: 3},
{meta: {a: 4}, x: 4},
{meta: {}, x: 1},
{meta: {}, x: 2},
{meta: {}, x: 3},
{meta: {}, x: 4},
]);
// Test $in on meta, inside $or.
checkAllBucketings({
$or: [
{"meta.a": {$in: [1, 3]}},
{"x": {$gt: 2}},
]
},
[
{meta: {a: 1}, x: 1},
{meta: {a: 2}, x: 2},
{meta: {a: 3}, x: 3},
{meta: {a: 4}, x: 4},
{meta: {}, x: 1},
{meta: {}, x: 2},
{meta: {}, x: 3},
{meta: {}, x: 4},
]);
// Test geo predicates on meta, inside $or.
for (const pred of ['$geoWithin', '$geoIntersects']) {
checkAllBucketings({
$or: [
{
"meta.location": {
[pred]: {
$geometry: {
type: "Polygon",
coordinates: [[
[0, 0],
[0, 3],
[3, 3],
[3, 0],
[0, 0],
]]
}
}
}
},
{x: {$gt: 2}},
]
},
[
{meta: {location: [1, 1]}, x: 1},
{meta: {location: [1, 1]}, x: 2},
{meta: {location: [1, 1]}, x: 3},
{meta: {location: [1, 1]}, x: 4},
{meta: {location: [5, 5]}, x: 1},
{meta: {location: [5, 5]}, x: 2},
{meta: {location: [5, 5]}, x: 3},
{meta: {location: [5, 5]}, x: 4},
]);
}
// Test $mod on meta, inside $or.
// $mod is an example of a predicate that we don't handle specially in time-series optimizations:
// it can be pushed down if and only if it's on a metadata field.
checkAllBucketings({
$or: [
{"meta.a": {$mod: [2, 0]}},
{"x": {$gt: 4}},
]
},
[
{meta: {a: 1}, x: 1},
{meta: {a: 2}, x: 2},
{meta: {a: 3}, x: 3},
{meta: {a: 4}, x: 4},
{meta: {a: 5}, x: 5},
{meta: {a: 6}, x: 6},
{meta: {a: 7}, x: 7},
{meta: {a: 8}, x: 8},
]);
// Test $elemMatch on meta, inside $or.
checkAllBucketings({
$or: [
{"meta.a": {$elemMatch: {b: 3}}},
{"x": {$gt: 4}},
]
},
[
{x: 1, meta: {a: []}},
{x: 2, meta: {a: [{b: 2}]}},
{x: 3, meta: {a: [{b: 3}]}},
{x: 4, meta: {a: [{b: 2}, {b: 3}]}},
{x: 5, meta: {a: []}},
{x: 6, meta: {a: [{b: 2}]}},
{x: 7, meta: {a: [{b: 3}]}},
{x: 8, meta: {a: [{b: 2}, {b: 3}]}},
]);
checkAllBucketings({
$or: [
{"meta.a": {$elemMatch: {b: 2, c: 3}}},
{"x": {$gt: 3}},
]
},
[
{x: 1, meta: {a: []}},
{x: 2, meta: {a: [{b: 2, c: 3}]}},
{x: 3, meta: {a: [{b: 2}, {c: 3}]}},
{x: 4, meta: {a: []}},
{x: 5, meta: {a: [{b: 2, c: 3}]}},
{x: 6, meta: {a: [{b: 2}, {c: 3}]}},
]);
})();
|
