JSON_UNQUOTE
Syntax
JSON_UNQUOTE(val)
Description
Unquotes a JSON value, returning a string, or NULL if the argument is null.
An error will occur if the given value begins and ends with double quotes and is an invalid JSON string literal.
If the given value is not a JSON string, value is passed through unmodified.
Certain character sequences have special meanings within a string. Usually, a backslash is ignored, but the escape sequences in the table below are recognised by MariaDB, unless the SQL Mode is set to NO_BACKSLASH_ESCAPES SQL.
| Escape sequence | Character |
|---|---|
\" | Double quote (") |
\b | Backslash |
\f | Formfeed |
\n | Newline (linefeed) |
\r | Carriage return |
\t | Tab |
\\ | Backslash (\) |
\uXXXX | UTF-8 bytes for Unicode value XXXX |
Examples
SELECT JSON_UNQUOTE('"Monty"'); +-------------------------+ | JSON_UNQUOTE('"Monty"') | +-------------------------+ | Monty | +-------------------------+
With the default SQL Mode:
SELECT JSON_UNQUOTE('Si\bng\ting'); +-----------------------------+ | JSON_UNQUOTE('Si\bng\ting') | +-----------------------------+ | Sng ing | +-----------------------------+
Setting NO_BACKSLASH_ESCAPES:
SET @@sql_mode = 'NO_BACKSLASH_ESCAPES';
SELECT JSON_UNQUOTE('Si\bng\ting');
+-----------------------------+
| JSON_UNQUOTE('Si\bng\ting') |
+-----------------------------+
| Si\bng\ting |
+-----------------------------+
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