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# JSON\_SEARCH

## Syntax

```bnf
JSON_SEARCH(json_doc, return_arg, search_str[, escape_char[, path] ...])
```

## Description

Returns the path to the given string within a JSON document, or `NULL` if any of *json\_doc*, *search\_str* or a path argument is `NULL`; if the search string is not found, or if no path exists within the document.

A warning will occur if the JSON document is not valid, any of the path arguments are not valid, if *return\_arg* is neither *one* nor *all*, or if the escape character is not a constant. `NULL` will be returned.

*return\_arg* can be one of two values:

* `'one`: Terminates after finding the first match, so will return one path string. If there is more than one match, it is undefined which is considered first.
* `all`: Returns all matching path strings, without duplicates. Multiple strings are autowrapped as an array. The order is undefined.

## Examples

```sql
SET @json = '["A", [{"B": "1"}], {"C":"AB"}, {"D":"BC"}]';

SELECT JSON_SEARCH(@json, 'one', 'AB');
+---------------------------------+
| JSON_SEARCH(@json, 'one', 'AB') |
+---------------------------------+
| "$[2].C"                        |
+---------------------------------+
```

<sub>*This page is licensed: CC BY-SA / Gnu FDL*</sub>

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