Does MongoDB have stored procedures?

What is the equivalent of stored procedure in MongoDB?

Stored Procedures in MongoDB. Stored procedures are used in relational databases to ensure that complex query operations are executed at the database layer. Nowadays, the need for stored procedures is replaced by other more advanced techniques, such as the aggregation pipelines available in MongoDB.

Does NoSQL support stored procedure?

MySQL supports stored routines (procedures and functions). A stored routine is a set of SQL statements that can be stored in the server. Once this has been done, clients don't need to keep reissuing the individual statements but can refer to the stored routine instead.

How does MongoDB store records?

In MongoDB, data is stored as documents. These documents are stored in MongoDB in JSON (JavaScript Object Notation) format. JSON documents support embedded fields, so related data and lists of data can be stored with the document instead of an external table. JSON is formatted as name/value pairs.

Does MongoDB database have tables for storing records?

Instead of tables, a MongoDB database stores its data in collections. A collection holds one or more BSON documents. Documents are analogous to records or rows in a relational database table.

How to create a stored procedure in MongoDB?

The following is the syntax to create MongoDB stored procedure − db.system.js.save ( { _id:"yourStoredProcedueName", value:function (argument1,....N) { statement1, . . N } } ); Now implement the above syntax. The query to create a stored procedure is as follows − Now you can call the stored procedure using eval ().

Should I use MongoDB stored JavaScript?

If you’re coming from a SQL background where you know exactly how to implement stored procedures, using MongoDB stored javascript can feel like a bit of a departure but we find it quite easy. First of all we found it refreshing to write our stored procedures in Javascript which is becoming increasingly popular and second-nature to most developers.

Is it possible to use pure pure procedures in MongoDB?

Pure “stored procedures” don’t exist in MongoDB but we have a couple of alternatives that are way easier to use in my opinion. In my distant past, I remember some databases filled with PL/SQL that only one person could maintain (that left 2 years ago). This garbage code wasn’t saved nor versioned anywhere… This still haunts me to this day. Anyway…

What does $ $project do in MongoDB?

$project shape the docs for the next stage. $merge to merge back into the original collection the “enriched” documents. This aggregation is fully executed on the database and can be very fast if it’s backed by the right indexes. insertMany the stores in the stores collection.