The Ultimate Guide to High Availability with MariaDB
This is a read-only copy of the MariaDB Knowledgebase generated on 2024-12-18. For the latest, interactive version please visit https://mariadb.com/kb/.

JSON_EXISTS

Syntax

JSON_EXISTS(json_doc, json_path)

Description

Determines whether json_doc has an element pointed to by path json_path. Returns 1 if the element exists, 0 if not, or NULL if any of the inputs were NULL.

Examples

SELECT JSON_EXISTS('{"key1":"xxxx", "key2":[1, 2, 3]}', "$.key2");
+------------------------------------------------------------+
| JSON_EXISTS('{"key1":"xxxx", "key2":[1, 2, 3]}', "$.key2") |
+------------------------------------------------------------+
|                                                          1 |
+------------------------------------------------------------+

SELECT JSON_EXISTS('{"key1":"xxxx", "key2":[1, 2, 3]}', "$.key3");
+------------------------------------------------------------+
| JSON_EXISTS('{"key1":"xxxx", "key2":[1, 2, 3]}', "$.key3") |
+------------------------------------------------------------+
|                                                          0 |
+------------------------------------------------------------+

SELECT JSON_EXISTS('{"key1":"xxxx", "key2":[1, 2, 3]}', "$.key2[1]");
+---------------------------------------------------------------+
| JSON_EXISTS('{"key1":"xxxx", "key2":[1, 2, 3]}', "$.key2[1]") |
+---------------------------------------------------------------+
|                                                             1 |
+---------------------------------------------------------------+

SELECT JSON_EXISTS('{"key1":"xxxx", "key2":[1, 2, 3]}', "$.key2[10]");
+----------------------------------------------------------------+
| JSON_EXISTS('{"key1":"xxxx", "key2":[1, 2, 3]}', "$.key2[10]") |
+----------------------------------------------------------------+
|                                                              0 |
+----------------------------------------------------------------+
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