Option Description Syntax Restrictions; i: Case insensitivity to match upper and lower cases. Extended support for MongoDB 3.2 and MongoDB 3.4 aggregation ... Providing dedicated wrapper types for collections is a commonly used pattern to provide API on a query execution result that returns multiple elements. This is the second dataset used in the MongoDB Chart tutorials. Note that BSONObj's have a smart pointer capability built in – so you can pass them around by value. C++ representation of a "BSON" object – that is, an extended JSON-style object in a binary representation. MongoDB Extended JSON is a string format for representing BSON documents. Cons. Outlier The sales collection uses the Extended Reference pattern to hold both the items sold and their details as well as information on the customer who purchased these items. ^ for the start, $ for the end), match at the beginning or end of each line for strings with multiline values. Pros. Extended support for MongoDB 3.2 and MongoDB 3.4 aggregation operators ... Providing dedicated wrapper types for collections is a commonly used pattern to provide an API for a query result that returns multiple elements. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. The reference counts used to implement this do not use locking, so copying and destroying BSONObj's are not thread-safe operations. There are no additional indexes. For an example, see Perform Case-Insensitive Regular Expression Match. The following page discusses MongoDB Extended JSON v2. : m: For patterns that include anchors (i.e. Additionally, it ignores characters in-between and including an un-escaped hash/pound ( # ) character and the next new line, so that you may include comments in complicated patterns. To Embed or Reference When building a new application, often one of the first things you’ll want to do is to design its data model. Faster reads and a reduction in the overall number of JOINs. Q&A for Work. Teams. In relational databases … - Selection from MongoDB Applied Design Patterns [Book] Chapter 1. For mongo shell wrapper methods for types, see Data Types in the mongo Shell. “Extended” capability to ignore all white space characters in the pattern unless escaped or included in a character class. Without this option, these anchors match at beginning or end of the string. For discussion on the Legacy MongoDB Extended JSON v1, see MongoDB Extended JSON (v1). Canonical Mode A string format that emphasizes type preservation at the expense of readability and interoperability. See bsonspec.org. This specification defines the canonical format for representing each BSON type in the Extended JSON format. Improves performance when there are a lot of JOIN operations. Extended Reference. Data duplication. JSON can only directly represent a subset of the types supported by BSON. 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