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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 Description
JsonB const &
Regular value type, supporting copy, assign, move.
Parameter Name Description
JsonB &&
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 Description
JsonB const &
JsonB &
operator=(JsonB &&)
Regular value type, supporting copy, assign, move.
Parameter Name Description
JsonB &&
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++ client library, focusing on versions from 2.11.0 up to the latest release candidate, 2.37.0-rc."],["`JsonB` stores data in a binary format, making it faster to process compared to `Json`, which stores an exact copy of the RFC 7159 text, despite having a slower input."],["The `JsonB` class does not preserve white space, the order of object keys, or duplicate object keys, and is only applicable to PostgreSQL databases."],["The `JsonB` class supports various constructors, including default null values, and conversion to a JSON formatted string."],["It also supports regular value type, supporting copy, assign and move operations."]]],[]]
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