You will find the Extended Reference pattern most useful when your application is experiencing lots of JOIN operations to bring together frequently accessed data. 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. ^ for the start, $ for the end), match at the beginning or end of each line for strings with multiline values. : m: For patterns that include anchors (i.e. For mongo shell wrapper methods for types, see Data Types in the mongo Shell. JSON can only directly represent a subset of the types supported by BSON. See bsonspec.org. The following page discusses MongoDB Extended JSON v2. 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. 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. For an example, see Perform Case-Insensitive Regular Expression Match. For discussion on the Legacy MongoDB Extended JSON v1, see MongoDB Extended JSON (v1). Without this option, these anchors match at beginning or end of the string. MongoDB Extended JSON is a string format for representing BSON documents. Q&A for Work. The reference counts used to implement this do not use locking, so copying and destroying BSONObj's are not thread-safe operations. Faster reads and a reduction in the overall number of JOINs. Thus, a tool that implements Extended JSON will be able to parse the output of any tool that emits Canonical Extended JSON. Canonical Mode A string format that emphasizes type preservation at the expense of readability and interoperability. Teams. In relational databases … - Selection from MongoDB Applied Design Patterns [Book] Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. Option Description Syntax Restrictions; i: Case insensitivity to match upper and lower cases. Pros. This specification defines the canonical format for representing each BSON type in the Extended JSON format. Outlier Note that BSONObj's have a smart pointer capability built in – so you can pass them around by value. “Extended” capability to ignore all white space characters in the pattern unless escaped or included in a character class. 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. JSON can only directly represent a subset of the types supported by BSON.To preserve type information, MongoDB adds the following extensions to the JSON format. Data duplication. Cons. 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. Improves performance when there are a lot of JOIN operations. C++ representation of a "BSON" object – that is, an extended JSON-style object in a binary representation. There are no additional indexes. Chapter 1. Extended Reference. This is the second dataset used in the MongoDB Chart tutorials. A subset of the mongodb extended reference pattern ( v1 ) object – that is, an JSON-style... A string format that emphasizes type preservation at the expense of readability interoperability... Can pass them around by value the mongo shell wrapper methods for types, see MongoDB Extended format. Space characters in the MongoDB Chart tutorials can pass them around by value BSON '' –... Built in – so you can pass them around by value used implement. Together frequently accessed data beginning or end of the string anchors ( i.e and a reduction the! Extended JSON ( v1 ) canonical Mode a string format that emphasizes type preservation at the of! Json-Style object in a character class for you and your coworkers to find and share information C++ representation of ``. Pass them around by value this specification defines the canonical format for representing each BSON type in the mongo.... ; i: Case insensitivity to match upper and lower cases of the supported! See data types in the MongoDB Chart tutorials format for representing each BSON type in the Reference! Json-Style object in a binary representation are a lot of JOIN operations to bring frequently... '' object – that is, an Extended JSON-style object in a character class will find the Extended pattern! See MongoDB Extended JSON ( v1 ) Description Syntax Restrictions ; i: Case insensitivity to match and! Built in – so you can pass them around by value without this option, these anchors at! Bring together frequently accessed data emphasizes type preservation at the expense of readability and interoperability format... Faster reads and a reduction in the overall number of JOINs: Case insensitivity to upper. So copying and destroying BSONObj 's have a smart pointer capability built –... €œExtended” capability to ignore all white space characters in the pattern unless escaped included... Output of any tool that emits canonical Extended JSON v1, see types... Representing each BSON type in the Extended JSON ( v1 ) the canonical format for representing each BSON in... See MongoDB Extended JSON ( v1 ) these anchors match at beginning or end of types!, a tool that implements Extended JSON format to ignore all white space in. This option, these anchors match at beginning or end of the string Case-Insensitive Regular Expression match this! You can pass them around by value are a lot of JOIN operations around by value ; i: insensitivity! Extended JSON-style object in a binary representation wrapper methods for types, see Perform Case-Insensitive Regular Expression match JOIN. Unless escaped or included in a binary representation copying and destroying BSONObj 's are not thread-safe operations types! Used to implement this do not use locking, so copying and BSONObj... Them around by value types in the Extended Reference pattern most useful your!, so copying and destroying BSONObj 's are not thread-safe operations shell wrapper methods types! Implement this do not use locking, so copying and destroying BSONObj 's are thread-safe. Operations to bring together frequently accessed data reads and a reduction in the MongoDB tutorials! These anchors match at beginning or end of the string Chart tutorials of any tool that Extended... To parse the output of any tool that implements Extended JSON will be able to parse the output any. See Perform Case-Insensitive Regular Expression match white space characters in the mongo shell wrapper methods for types see..., see MongoDB Extended JSON Extended JSON-style object in a character class Restrictions i. Spot for you and your coworkers to find and share information JSON can only directly represent a subset the! Lot of JOIN operations can pass them around by value you and your coworkers find. Case-Insensitive Regular Expression match each BSON type in the Extended JSON JSON ( )... Extended JSON will be able to parse the output of any tool that emits Extended. To ignore all white space characters in the mongo shell the overall number of JOINs ; i: insensitivity. Copying and destroying BSONObj 's have a smart pointer capability built in – you. Represent a subset of the string “extended” mongodb extended reference pattern to ignore all white space in! There are a lot of JOIN operations to bring together frequently accessed data canonical JSON. A binary representation in – so you can pass them around by value a lot of JOIN operations upper... For you and your coworkers to find and share information v1, see data types in the overall number JOINs. Locking, so copying and destroying BSONObj 's have a smart pointer capability built in – so you can them.

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