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'use strict';
/**
* explain_update.js
*
* Runs explain() and update() on a collection.
*/
load('jstests/concurrency/fsm_libs/extend_workload.js'); // for extendWorkload
load('jstests/concurrency/fsm_workloads/explain.js'); // for $config
load('jstests/concurrency/fsm_workload_helpers/server_types.js'); // for isMongos
var $config = extendWorkload(
$config,
function($config, $super) {
$config.states = Object.extend(
{
explainBasicUpdate: function explainBasicUpdate(db, collName) {
var res = db[collName]
.explain('executionStats')
.update({i: this.nInserted}, {$set: {j: 49}});
assertAlways.commandWorked(res);
assertWhenOwnColl(function() {
assertWhenOwnColl.eq(1, explain.executionStats.totalDocsExamined);
// document should not have been updated.
var doc = db[collName].findOne({i: this.nInserted});
assertWhenOwnColl.eq(2 * this.nInserted, doc.j);
}.bind(this));
},
explainUpdateUpsert: function explainUpdateUpsert(db, collName) {
var res = db[collName]
.explain('executionStats')
.update({i: 2 * this.nInserted + 1},
{$set: {j: 81}},
/* upsert */ true);
assertAlways.commandWorked(res);
var stage = res.executionStats.executionStages;
// if explaining a write command through mongos
if (isMongos(db)) {
stage = stage.shards[0].executionStages;
}
assertAlways.eq(stage.stage, 'UPDATE');
assertWhenOwnColl(stage.wouldInsert);
// make sure that the insert didn't actually happen.
assertWhenOwnColl.eq(this.nInserted, db[collName].find().itcount());
},
explainUpdateMulti: function explainUpdateMulti(db, collName) {
var res = db[collName]
.explain('executionStats')
.update({i: {$lte: 2}},
{$set: {b: 3}},
/* upsert */ false,
/* multi */ true);
assertAlways.commandWorked(res);
var stage = res.executionStats.executionStages;
// if explaining a write command through mongos
if (isMongos(db)) {
stage = stage.shards[0].executionStages;
}
assertAlways.eq(stage.stage, 'UPDATE');
assertWhenOwnColl(!stage.wouldInsert);
assertWhenOwnColl.eq(3, stage.nMatched);
assertWhenOwnColl.eq(3, stage.nWouldModify);
}
},
$super.states);
$config.transitions =
Object.extend({explain: $config.data.assignEqualProbsToTransitions($config.states)},
$super.transitions);
return $config;
});
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