The execution of this explain will not modify data but runs the query predicate of the update operation. For candidate plans, MongoDB returns the execution information captured during the plan selection phase. db.runCommand( { explain: { update: "products", updates: [ { q: { quantity: 1057...
There are many different considerations to be made when running queries inMongoDB. A helpful thing to use in themongo shellwhen running afind()operation is to use theexplain()method. In this blog post, I’ll take a look at some of the options for explain() and what the results mean. ...
MongoDB provides different types of indexes to support specific types of data and queries. Default _id All the collections of MongoDB have an index on the _id field that exists by default. If novaluesspecified for the _id the MongoDB will create an _id field with an ObjectId value. The...
explainVersion, the output format version (for example, "1"). command, which details the command being explained. queryShapeHash, starting in MongoDB 8.0, which is a hexadecimal string with the hash of a query shape. For details, see Query Shapes, Query Shape Hash, and explain.queryShapeHa...
The execution of this explain will not modify data but runs the query predicate of the update operation. For candidate plans, MongoDB returns the execution information captured during the plan selection phase. db.runCommand( { explain: { update: "products", updates: [ { q: { quantity: 1057...
explainVersion, the output format version (for example, "1"). command, which details the command being explained. queryShapeHash, starting in MongoDB 8.0, which is a hexadecimal string with the hash of a query shape. For details, see Query Shapes, Query Shape Hash, and explain.queryShapeHa...
The possible modes are: "queryPlanner" (Default) "executionStats" "allPlansExecution" For backwards compatibility with earlier versions of cursor.explain(), MongoDB interprets true as "allPlansExecution" and false as "queryPlanner". For more information on the modes, see Verbosity Modes....
Starting in MongoDB 3.2 Starting in MongoDB 4.4 aggregate() count() find() remove() distinct() findAndModify() mapReduce() To use db.collection.explain(), append one of the aforementioned methods to db.collection.explain(): db.collection.explain().<method(...)> For example, db.products...
explainVersion, the output format version (for example,"1"). command, which details the command being explained. queryShapeHash, starting in MongoDB 8.0, which is a hexadecimal string with the hash of aquery shape. For details, seeQuery Shapes,Query Shape Hash, andexplain.queryShapeHash. ...
For backwards compatibility with earlier versions of explain(), MongoDB interprets true as allPlansExecution and false as queryPlanner. For more information on the modes, see Verbosity Modes. The explain() method returns a document with the query plan and, optionally, the execution statistics. ...