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. d
A good example of this is session data. Let’s see how to define the TTL option on the sessionlog collection. 1 db.sessionlog.createIndex( { "lastUpdateTime": 1 }, { expireAfterSeconds: 1800 } ) In this case, MongoDB will drop the documents from the collection automatically once ...
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...
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. ...
db.userdetails.find().sort({"extra.friends.ban_friends_id":1}) Here in the above example, the 'extra' is an array, and 'friends' and 'ban_firends_id' are subarrays. Geospatial Index To support efficient queries of geospatial coordinate data, MongoDB provides two special indexes: 2d ind...
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....
For backwards compatibility with earlier versions ofcursor.explain(), MongoDB interpretstrueas"allPlansExecution"andfalseas"queryPlanner". For more information on the modes, seeVerbosity Modes. Theexplain()method returns a document with the query plan and, optionally, the execution statistics. ...
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. ...