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JsonB is a variant of Json (see above).
While both classes share the same, thin client-side API, JsonB stores the data in a decomposed, binary format, whereas Json stores an exact copy of the RFC 7159 text.
This means that JsonB is slower to input, but faster to process as it avoids reparsing. Therefore, applications that utilize the structured state of a JSON value should prefer JsonB.
It also means that the JsonB stored representation does NOT preserve:
Note: JsonB is only applicable to PostgreSQL databases (i.e., those created using DatabaseDialect::POSTGRESQL).
Regular value type, supporting copy, assign, move.
Parameter Name DescriptionJsonB const &
Regular value type, supporting copy, assign, move.
Parameter Name DescriptionJsonB &&
A null value.
JsonB(std::string)Construction from a JSON-formatted string.
Note that there is no check here that the argument string is indeed well-formatted. Error detection will be delayed until the value is passed to Spanner.
Parameter Name Descriptions std::string
Regular value type, supporting copy, assign, move.
Parameter Name DescriptionJsonB const &
JsonB & operator=(JsonB &&)
Regular value type, supporting copy, assign, move.
Parameter Name DescriptionJsonB &&
JsonB & operator std::string() const &
Conversion to a JSON-formatted string.
operator std::string() &&Conversion to a JSON-formatted string.
Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 4.0 License, and code samples are licensed under the Apache 2.0 License. For details, see the Google Developers Site Policies. Java is a registered trademark of Oracle and/or its affiliates.
Last updated 2025-08-14 UTC.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Hard to understand","hardToUnderstand","thumb-down"],["Incorrect information or sample code","incorrectInformationOrSampleCode","thumb-down"],["Missing the information/samples I need","missingTheInformationSamplesINeed","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-14 UTC."],[[["This webpage details the `JsonB` class in the Google Cloud Spanner C++ library, offering versioned documentation from 2.11.0 to the latest release candidate 2.37.0-rc."],["`JsonB` is a variant of `Json` that stores data in a binary format for faster processing, although it is slower to input and does not preserve white space, object key order, or duplicate keys."],["The primary advantage of using `JsonB` over `Json` is that applications needing the structured state of a JSON value will be able to process faster than if they used `Json`."],["`JsonB` is compatible only with PostgreSQL databases within Cloud Spanner and offers constructors for creating null values, from JSON-formatted strings, or copying and moving from other `JsonB` objects."],["The `JsonB` class supports standard operations such as copying, assignment, moving, and conversion to a JSON-formatted string, along with multiple operators."]]],[]]
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