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/**
* Test explaining various operations against a non-existent collection.
* @tags: [
* assumes_no_implicit_collection_creation_after_drop,
* ]
*/
(function() {
// Ensure db exists (needed for explain to work).
db.filler_collection.drop();
assert.commandWorked(db.createCollection("filler_collection"));
db.filler_collection.drop();
var missingColl = db.explain_null_collection;
var explain;
var explainColl;
// .find()
missingColl.drop();
explain = missingColl.explain("executionStats").find().finish();
assert.commandWorked(explain);
assert("executionStats" in explain);
// .count()
missingColl.drop();
explain = missingColl.explain("executionStats").count();
assert.commandWorked(explain);
assert("executionStats" in explain);
// .remove()
missingColl.drop();
explain = missingColl.explain("executionStats").remove({a: 1});
assert.commandWorked(explain);
assert("executionStats" in explain);
// .update() with upsert: false
missingColl.drop();
explainColl = missingColl.explain("executionStats");
explain = explainColl.update({a: 1}, {b: 1});
assert.commandWorked(explain);
assert("executionStats" in explain);
// .update() with upsert: true
missingColl.drop();
explainColl = missingColl.explain("executionStats");
explain = explainColl.update({a: 1}, {b: 1}, {upsert: true});
assert.commandWorked(explain);
assert("executionStats" in explain);
// .aggregate()
missingColl.drop();
explain = missingColl.explain("executionStats").aggregate([{$match: {a: 1}}]);
assert.commandWorked(explain);
}());
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