| --- |
| { |
| "title": "JSON_UNQUOTE", |
| "language": "en" |
| } |
| --- |
| |
| <!-- |
| Licensed to the Apache Software Foundation (ASF) under one |
| or more contributor license agreements. See the NOTICE file |
| distributed with this work for additional information |
| regarding copyright ownership. The ASF licenses this file |
| to you under the Apache License, Version 2.0 (the |
| "License"); you may not use this file except in compliance |
| with the License. You may obtain a copy of the License at |
| |
| http://www.apache.org/licenses/LICENSE-2.0 |
| |
| Unless required by applicable law or agreed to in writing, |
| software distributed under the License is distributed on an |
| "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| KIND, either express or implied. See the License for the |
| specific language governing permissions and limitations |
| under the License. |
| --> |
| |
| ## json_unquote |
| ### Description |
| #### Syntax |
| |
| `VARCHAR json_unquote(VARCHAR)` |
| |
| This function unquotes a JSON value and returns the result as a utf8mb4 string. If the argument is NULL, it will return NULL. |
| |
| Escape sequences within a string as shown in the following table will be recognized. Backslashes will be ignored for all other escape sequences. |
| |
| | Escape Sequence | Character Represented by Sequence | |
| |-----------------|------------------------------------| |
| | \" | A double quote (") character | |
| | \b | A backspace character | |
| | \f | A formfeed character | |
| | \n | A newline (linefeed) character | |
| | \r | A carriage return character | |
| | \t | A tab character | |
| | \\ | A backslash (\) character | |
| | \uxxxx | UTF-8 bytes for Unicode value XXXX | |
| |
| |
| |
| ### example |
| |
| ``` |
| mysql> SELECT json_unquote('"doris"'); |
| +-------------------------+ |
| | json_unquote('"doris"') | |
| +-------------------------+ |
| | doris | |
| +-------------------------+ |
| |
| mysql> SELECT json_unquote('[1, 2, 3]'); |
| +---------------------------+ |
| | json_unquote('[1, 2, 3]') | |
| +---------------------------+ |
| | [1, 2, 3] | |
| +---------------------------+ |
| |
| |
| mysql> SELECT json_unquote(null); |
| +--------------------+ |
| | json_unquote(NULL) | |
| +--------------------+ |
| | NULL | |
| +--------------------+ |
| |
| mysql> SELECT json_unquote('"\\ttest"'); |
| +--------------------------+ |
| | json_unquote('"\ttest"') | |
| +--------------------------+ |
| | test | |
| +--------------------------+ |
| ``` |
| ### keywords |
| json,unquote,json_unquote |
