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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."],[[["The page details the `JsonB` class in the Google Cloud Spanner C++ client library, specifically focusing on versions 2.30.0 through 2.37.0-rc, along with several previous versions."],["`JsonB` is a variant of `Json` that stores data in a binary format, making it faster to process but slower to input compared to `Json`, which stores data as an exact copy of the RFC 7159 text."],["`JsonB` is best for applications needing the structured state of a JSON value, as it avoids reparsing, but does not preserve whitespace, object key order, or duplicate keys."],["The `JsonB` class supports copy, assign, and move operations and can be constructed from a JSON-formatted string or as a null value, with error detection on the JSON string being deferred until it is passed to Spanner."],["`JsonB` is only applicable to PostgreSQL databases."]]],[]]
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