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12.17.1 JSON Function Reference
Table 12.21 JSON Functions
Name | Description |
---|---|
JSON_ARRAY() |
Create JSON array |
JSON_ARRAY_APPEND() |
Append data to JSON document |
JSON_ARRAY_INSERT() |
Insert into JSON array |
-> |
Return value from JSON column after evaluating path; equivalent to JSON_EXTRACT(). |
JSON_CONTAINS() |
Whether JSON document contains specific object at path |
JSON_CONTAINS_PATH() |
Whether JSON document contains any data at path |
JSON_DEPTH() |
Maximum depth of JSON document |
JSON_EXTRACT() |
Return data from JSON document |
->> |
Return value from JSON column after evaluating path and unquoting the result; equivalent to JSON_UNQUOTE(JSON_EXTRACT()). |
JSON_INSERT() |
Insert data into JSON document |
JSON_KEYS() |
Array of keys from JSON document |
JSON_LENGTH() |
Number of elements in JSON document |
JSON_MERGE() (deprecated 8.0.3) |
Merge JSON documents, preserving duplicate keys. Deprecated synonym for JSON_MERGE_PRESERVE() |
JSON_MERGE_PATCH() |
Merge JSON documents, replacing values of duplicate keys |
JSON_MERGE_PRESERVE() |
Merge JSON documents, preserving duplicate keys |
JSON_OBJECT() |
Create JSON object |
JSON_OVERLAPS() |
Compares two JSON documents, returns TRUE (1) if these have any key-value pairs or array elements in common, otherwise FALSE (0) |
JSON_PRETTY() |
Print a JSON document in human-readable format |
JSON_QUOTE() |
Quote JSON document |
JSON_REMOVE() |
Remove data from JSON document |
JSON_REPLACE() |
Replace values in JSON document |
JSON_SCHEMA_VALID() |
Validate JSON document against JSON schema; returns TRUE/1 if document validates against schema, or FALSE/0 if it does not |
JSON_SCHEMA_VALIDATION_REPORT() |
Validate JSON document against JSON schema; returns report in JSON format on outcome on validation including success or failure and reasons for failure |
JSON_SEARCH() |
Path to value within JSON document |
JSON_SET() |
Insert data into JSON document |
JSON_STORAGE_FREE() |
Freed space within binary representation of JSON column value following partial update |
JSON_STORAGE_SIZE() |
Space used for storage of binary representation of a JSON document |
JSON_TABLE() |
Return data from a JSON expression as a relational table |
JSON_TYPE() |
Type of JSON value |
JSON_UNQUOTE() |
Unquote JSON value |
JSON_VALID() |
Whether JSON value is valid |
MEMBER OF() |
Returns true (1) if first operand matches any element of JSON array passed as second operand, otherwise returns false (0) |
MySQL supports two aggregate JSON functions
JSON_ARRAYAGG()
and
JSON_OBJECTAGG()
. See
Section 12.20, “Aggregate (GROUP BY) Functions”, for
descriptions of these.
MySQL also supports “pretty-printing” of JSON values
in an easy-to-read format, using the
JSON_PRETTY()
function. You can see
how much storage space a given JSON value takes up, and how much
space remains for additional storage, using
JSON_STORAGE_SIZE()
and
JSON_STORAGE_FREE()
, respectively.
For complete descriptions of these functions, see
Section 12.17.8, “JSON Utility Functions”.
Document created the 26/06/2006, last modified the 26/10/2018
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