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/*
* Test partitioning inside $setWindowFields.
*
* @tags: [
* # We assume the pipeline is not split into a shardsPart and mergerPart.
* assumes_unsharded_collection,
* # We're testing the explain plan, not the query results, so the facet passthrough would fail.
* do_not_wrap_aggregations_in_facets,
* ]
*/
(function() {
"use strict";
const getParam = db.adminCommand({getParameter: 1, featureFlagWindowFunctions: 1});
jsTestLog(getParam);
const featureEnabled = assert.commandWorked(getParam).featureFlagWindowFunctions.value;
if (!featureEnabled) {
jsTestLog("Skipping test because the window function feature flag is disabled");
return;
}
const coll = db[jsTestName()];
coll.drop();
assert.commandWorked(coll.insert({int_field: 0, arr: [1, 2]}));
// Test for runtime error when 'partitionBy' expression evaluates to an array
assert.commandFailedWithCode(coll.runCommand({
aggregate: coll.getName(),
pipeline: [{
$setWindowFields: {
partitionBy: "$arr",
sortBy: {_id: 1},
output: {a: {$sum: "$int_field", window: {documents: ["unbounded", "current"]}}}
}
}],
cursor: {}
}),
ErrorCodes.TypeMismatch);
// Test that a constant expression for 'partitionBy' is equivalent to no partitioning.
const constantPartitionExprs = [null, "constant", {$add: [1, 2]}];
constantPartitionExprs.forEach(function(partitionExpr) {
const result = coll.explain().aggregate([
// prevent stages from being absorbed into the .find() layer
{$_internalInhibitOptimization: {}},
{$setWindowFields: {partitionBy: partitionExpr, output: {}}},
]);
assert.commandWorked(result);
assert(Array.isArray(result.stages), result);
assert(result.stages[0].$cursor, result);
assert(result.stages[1].$_internalInhibitOptimization, result);
assert.eq({$_internalSetWindowFields: {output: {}}}, result.stages[2]);
});
})();
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