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/**
* A test for conjunctive and disjunctive predicates using a semi-realistic collection/queries.
* @tags: [
* requires_cqf,
* ]
*/
(function() {
load("jstests/libs/ce_stats_utils.js"); // For 'getRootCE', 'createHistogram'.
const collCard = 300;
const numberBuckets = 5;
const coll = db.ce_mixed;
coll.drop();
function generateData(num) {
const firstNames =
["Elizabeth", "William", "John", "Jane", "Kate", "Tom", "Tim", "Bob", "Alice"];
const lastNames = ["Smith", "Green", "Parker", "Bennet", "Knight", "Darcy", "Watson", "Holmes"];
const allToppings =
["mushrooms", "prosciutto", "ham", "pepperoni", "bell peppers", "anchovies", "pineapple"];
const pizzaShops = ["Pacinos", "Zizzi", "Milanos", "PI"];
function getName(i) {
return `${firstNames[i % firstNames.length]} ${lastNames[i % lastNames.length]}`;
}
function getDate(i) {
const padZero = (x) => x >= 10 ? x : `0${x}`;
const yy = 1950 + i % 50;
const mm = padZero((i % 12) + 1);
const dd = padZero((i % 28) + 1);
return new ISODate(`${yy}-${mm}-${dd}T00:00:00`);
}
function getPizzaToppings(i) {
let toppings = [];
for (let j = 0; j < (i % 5); j++) {
toppings.push(allToppings[j % allToppings.length]);
}
return toppings;
}
function getPizzaShop(i) {
return i > 50 ? pizzaShops[i % pizzaShops.length] : pizzaShops[0];
}
let data = [];
for (let i = 0; i < num; i++) {
const likesPizza = i % 2 ? true : false;
data.push({
// Fields without histograms.
_id: i,
lastPizzaShopVisited: getPizzaShop(i),
// Fields with histograms.
name: getName(i),
date: getDate(i),
likesPizza,
favPizzaToppings: likesPizza ? getPizzaToppings(i) : [],
});
}
return data;
}
const data = generateData(collCard);
print(tojson(data));
assert.commandWorked(coll.insert(data));
assert.commandWorked(
coll.createIndexes([{name: 1}, {date: 1}, {likesPizza: 1}, {pizzaToppings: 1}]));
function testCEForStrategy(predicate, strategy) {
forceCE(strategy);
const explain = coll.explain("executionStats").aggregate({$match: predicate});
const nReturned = explain.executionStats.nReturned;
const ce = getRootCE(explain);
return [nReturned, ce, explain];
}
function testPredicate(predicate) {
const [heuN, heuCE, heuExplain] = testCEForStrategy(predicate, "heuristic");
const [hisN, hisCE, hisExplain] = testCEForStrategy(predicate, "histogram");
assert.eq(heuN, hisN);
jsTestLog(`Query: ${tojsononeline(predicate)} returned ${heuN} documents.`);
if (Math.abs(heuCE - hisCE) < 0.001) {
print(`Histogram and heuristic estimates were equal: ${heuCE}.\n`);
print("\nHeuristic explain: ", tojson(summarizeExplainForCE(heuExplain)));
} else {
print(`Histogram estimate: ${hisCE}.\n`);
print(`Heuristic estimate: ${heuCE}.\n`);
print("Histogram explain: ", tojson(summarizeExplainForCE(hisExplain)));
}
print("\nHeuristic explain: ", tojson(summarizeExplainForCE(heuExplain)));
}
runHistogramsTest(function() {
createHistogram(coll, "name", {numberBuckets});
createHistogram(coll, "date", {numberBuckets});
createHistogram(coll, "likesPizza", {numberBuckets});
createHistogram(coll, "favPizzaToppings", {numberBuckets});
// Test single predicates that use histograms.
testPredicate({likesPizza: true});
testPredicate({likesPizza: false});
testPredicate({date: {$gt: new ISODate("1950-01-01T00:00:00")}});
testPredicate({date: {$lt: new ISODate("1979-12-06T00:00:00")}});
testPredicate({name: {$lte: "Bob Bennet"}});
testPredicate({favPizzaToppings: "mushrooms"});
// Test single predicates that use heuristics.
testPredicate({lastPizzaShopVisited: "Zizzi"});
testPredicate({lastPizzaShopVisited: "Pacinos"});
// Test conjunctions of predicates all using histograms.
testPredicate({
likesPizza: true,
date: {$gt: new ISODate("1950-01-01T00:00:00"), $lt: new ISODate("1979-12-06T00:00:00")}
});
testPredicate({likesPizza: false, name: {$lte: "Bob Bennet"}});
testPredicate({favPizzaToppings: "mushrooms", name: {$lte: "Bob Bennet"}});
// Test disjunctions of predicates all using histograms.
testPredicate({$or: [{likesPizza: true}, {date: {$lt: new ISODate("1955-01-01T00:00:00")}}]});
testPredicate({
$or: [{favPizzaToppings: "mushrooms"}, {name: {$lte: "Bob Bennet", $gte: "Alice Smith"}}]
});
testPredicate({
$or: [
{$and: [{likesPizza: false}, {name: {$lte: "Bob Bennet"}}]},
{$and: [{likesPizza: true}, {name: {$gte: "Tom Watson"}}]}
]
});
testPredicate({
$or: [
{$and: [{likesPizza: false}, {name: {$lte: "Bob Bennet"}}]},
{date: {$lte: "1960-01-01T00:00:00"}}
]
});
// Test conjunctions of predicates such that some use histograms and others use heuristics.
testPredicate({lastPizzaShopVisited: "Zizzi", likesPizza: true});
testPredicate({lastPizzaShopVisited: "Zizzi", likesPizza: false});
testPredicate({lastPizzaShopVisited: "Zizzi", date: {$gt: new ISODate("1950-01-01T00:00:00")}});
testPredicate({lastPizzaShopVisited: "Zizzi", date: {$lt: new ISODate("1979-12-06T00:00:00")}});
testPredicate({
lastPizzaShopVisited: "Zizzi",
date: {$gt: new ISODate("1950-01-01T00:00:00"), $lt: new ISODate("1979-12-06T00:00:00")}
});
testPredicate({lastPizzaShopVisited: "Pacinos", name: {$lte: "Bob Bennet"}});
testPredicate({lastPizzaShopVisited: "Pacinos", favPizzaToppings: "mushrooms"});
testPredicate({
lastPizzaShopVisited: "Pacinos",
date: {$gt: new ISODate("1950-01-01T00:00:00")},
favPizzaToppings: "mushrooms",
likesPizza: true
});
// Test disjunctions of predicates such that some use histograms and others use heuristics.
testPredicate({$or: [{lastPizzaShopVisited: "Zizzi"}, {likesPizza: true}]});
testPredicate({
$or: [
{lastPizzaShopVisited: "Zizzi"},
{
date: {
$gt: new ISODate("1950-01-01T00:00:00"),
$lt: new ISODate("1960-01-01T00:00:00")
}
}
]
});
testPredicate({
$or: [
{$and: [{lastPizzaShopVisited: "Zizzi"}, {name: {$lte: "John Watson"}}]},
{$and: [{favPizzaToppings: "mushrooms"}, {likesPizza: true}]}
]
});
testPredicate({
$or: [
{$and: [{lastPizzaShopVisited: "Zizzi"}, {name: {$lte: "John Watson"}}]},
{$and: [{lastPizzaShopVisited: "Zizzi"}, {name: {$gte: "Kate Knight"}}]}
]
});
testPredicate({
$or: [
{$and: [{lastPizzaShopVisited: "Zizzi"}, {name: {$lte: "John Watson"}}]},
{favPizzaToppings: "mushrooms"}
]
});
testPredicate({
$or: [
{$and: [{favPizzaToppings: "mushrooms"}, {name: {$lte: "John Watson"}}]},
{lastPizzaShopVisited: "Zizzi"}
]
});
});
})();
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