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/**
* Test that $** indexes work when provided with a partial filter expression.
*/
(function() {
"use strict";
load("jstests/libs/analyze_plan.js"); // For isIxScan, isCollscan.
const coll = db.wildcard_partial_index;
function testPartialWildcardIndex(indexKeyPattern, indexOptions) {
coll.drop();
assert.commandWorked(coll.createIndex(indexKeyPattern, indexOptions));
assert.commandWorked(coll.insert({x: 5, a: 2})); // Not in index.
assert.commandWorked(coll.insert({x: 6, a: 1})); // In index.
// find() operations that should use the index.
let explain = coll.explain("executionStats").find({x: 6, a: 1}).finish();
assert.eq(1, explain.executionStats.nReturned);
assert(isIxscan(db, explain.queryPlanner.winningPlan));
explain = coll.explain("executionStats").find({x: {$gt: 1}, a: 1}).finish();
assert.eq(1, explain.executionStats.nReturned);
assert(isIxscan(db, explain.queryPlanner.winningPlan));
explain = coll.explain("executionStats").find({x: 6, a: {$lte: 1}}).finish();
assert.eq(1, explain.executionStats.nReturned);
assert(isIxscan(db, explain.queryPlanner.winningPlan));
// find() operations that should not use the index.
explain = coll.explain("executionStats").find({x: 6, a: {$lt: 1.6}}).finish();
assert.eq(1, explain.executionStats.nReturned);
assert(isCollscan(db, explain.queryPlanner.winningPlan));
explain = coll.explain("executionStats").find({x: 6}).finish();
assert.eq(1, explain.executionStats.nReturned);
assert(isCollscan(db, explain.queryPlanner.winningPlan));
explain = coll.explain("executionStats").find({a: {$gte: 0}}).finish();
assert.eq(2, explain.executionStats.nReturned);
assert(isCollscan(db, explain.queryPlanner.winningPlan));
}
// Case where the partial filter expression is on a field in the index.
testPartialWildcardIndex({"$**": 1}, {partialFilterExpression: {a: {$lte: 1.5}}});
// Case where the partial filter expression is on a field not included in the index.
testPartialWildcardIndex({"x.$**": 1}, {partialFilterExpression: {a: {$lte: 1.5}}});
})();
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