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'use strict';
/**
* explain_find.js
*
* Runs explain() and find() on a collection.
*
*/
load('jstests/concurrency/fsm_libs/extend_workload.js'); // for extendWorkload
load('jstests/concurrency/fsm_workloads/explain.js'); // for $config
load('jstests/libs/analyze_plan.js'); // for planHasStage and isIxscan
var $config = extendWorkload($config, function($config, $super) {
$config.states = Object.extend({
explainLimit: function explainLimit(db, collName) {
var res = db[collName].find().limit(3).explain();
assertAlways.commandWorked(res);
assertAlways(planHasStage(res.queryPlanner.winningPlan, 'LIMIT'));
},
explainBatchSize: function explainBatchSize(db, collName) {
var res = db[collName].find().batchSize(3).explain();
assertAlways.commandWorked(res);
},
explainAddOption: function explainAddOption(db, collName) {
var res = db[collName].explain().find().addOption(DBQuery.Option.exhaust).finish();
assertAlways.commandWorked(res);
},
explainSkip: function explainSkip(db, collName) {
var res = db[collName].explain().find().skip(3).finish();
assertAlways.commandWorked(res);
assertAlways(planHasStage(res.queryPlanner.winningPlan, 'SKIP'));
},
explainSort: function explainSort(db, collName) {
var res = db[collName].find().sort({ i: -1 }).explain();
assertAlways.commandWorked(res);
assertAlways(planHasStage(res.queryPlanner.winningPlan, 'SORT'));
},
explainHint: function explainHint(db, collName) {
assertWhenOwnColl(function() {
var res = db[collName].find().hint({ j: 1 }).explain();
assertWhenOwnColl.commandWorked(res);
assertWhenOwnColl(isIxscan(res.queryPlanner.winningPlan));
});
},
explainMaxTimeMS: function explainMaxTimeMS(db, collName) {
var res = db[collName].find().maxTimeMS(2000).explain();
assertAlways.commandWorked(res);
},
explainSnapshot: function explainSnapshot(db, collName) {
var res = db[collName].find().snapshot().explain();
assertAlways.commandWorked(res);
assertWhenOwnColl(isIxscan(res.queryPlanner.winningPlan));
}
}, $super.states);
$config.transitions = Object.extend({
explain: $config.data.assignEqualProbsToTransitions($config.states)
}, $super.transitions);
// doubling number of iterations so there is a higher chance we will
// transition to each of the 8 new states at least once
$config.iterations = $super.iterations * 2;
return $config;
});
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