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'use strict';
/**
* explain_distinct.js
*
* Runs explain() and distinct() 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
var $config = extendWorkload($config, function($config, $super) {
$config.states = Object.extend({
explainBasicDistinct: function(db, collName) {
var res = db[collName].explain().distinct('i');
assertAlways.commandWorked(res);
assertAlways(planHasStage(res.queryPlanner.winningPlan, 'COLLSCAN'));
},
explainDistinctIndex: function(db, collName) {
var res = db[collName].explain().distinct('_id');
assertAlways.commandWorked(res);
assertAlways(planHasStage(res.queryPlanner.winningPlan, 'PROJECTION'));
assertAlways(planHasStage(res.queryPlanner.winningPlan, 'DISTINCT_SCAN'));
}
},
$super.states);
$config.transitions = Object.extend(
{explain: $config.data.assignEqualProbsToTransitions($config.states)}, $super.transitions);
return $config;
});
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