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[Vectorized](function) support order by convert_to function (#14555)

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zhangstar333
2022-11-29 15:22:27 +08:00
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docs/en/docs/sql-manual/sql-functions/string-functions/convert_to.md Normal file
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---
{
"title": "convert_to",
"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.
-->
<version since="1.2">
## convert_to
### description
#### Syntax
` convert_to(VARCHAR column, VARCHAR character)`
It is used in the order by clause. eg: order by convert(column using gbk), Now only support character can be converted to 'gbk'.
Because when the order by column contains Chinese, it is not arranged in the order of Pinyin
After the character encoding of column is converted to gbk, it can be arranged according to pinyin
</version>
### example
```
mysql> select * from class_test order by class_name;
+----------+------------+-------------+
| class_id | class_name | student_ids |
+----------+------------+-------------+
| 6 | asd | [6] |
| 7 | qwe | [7] |
| 8 | z | [8] |
| 2 | 哈 | [2] |
| 3 | 哦 | [3] |
| 1 | 啊 | [1] |
| 4 | 张 | [4] |
| 5 | 我 | [5] |
+----------+------------+-------------+
mysql> select * from class_test order by convert(class_name using gbk);
+----------+------------+-------------+
| class_id | class_name | student_ids |
+----------+------------+-------------+
| 6 | asd | [6] |
| 7 | qwe | [7] |
| 8 | z | [8] |
| 1 | 啊 | [1] |
| 2 | 哈 | [2] |
| 3 | 哦 | [3] |
| 5 | 我 | [5] |
| 4 | 张 | [4] |
+----------+------------+-------------+
```
### keywords
convert_to

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docs/sidebars.json
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"sql-manual/sql-functions/string-functions/split_part",
"sql-manual/sql-functions/string-functions/money_format",
"sql-manual/sql-functions/string-functions/parse_url",
"sql-manual/sql-functions/string-functions/convert_to",
"sql-manual/sql-functions/string-functions/extract_url_parameter",
"sql-manual/sql-functions/string-functions/uuid",
"sql-manual/sql-functions/string-functions/space",

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docs/zh-CN/docs/sql-manual/sql-functions/string-functions/convert_to.md Normal file
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---
{
"title": "convert_to",
"language": "zh-CN"
}
---
<!--
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.
-->
<version since="1.2">
## convert_to
### description
#### Syntax
` convert_to(VARCHAR column, VARCHAR character)`
在order by子句中使用，例如order by convert(column using gbk), 现在仅支持character转为'gbk'.
因为当order by column中包含中文时，其排列不是按照汉语拼音的顺序.
将column的字符编码转为gbk后，可实现按拼音的排列的效果.
</version>
### example
```
mysql> select * from class_test order by class_name;
+----------+------------+-------------+
| class_id | class_name | student_ids |
+----------+------------+-------------+
| 6 | asd | [6] |
| 7 | qwe | [7] |
| 8 | z | [8] |
| 2 | 哈 | [2] |
| 3 | 哦 | [3] |
| 1 | 啊 | [1] |
| 4 | 张 | [4] |
| 5 | 我 | [5] |
+----------+------------+-------------+
mysql> select * from class_test order by convert(class_name using gbk);
+----------+------------+-------------+
| class_id | class_name | student_ids |
+----------+------------+-------------+
| 6 | asd | [6] |
| 7 | qwe | [7] |
| 8 | z | [8] |
| 1 | 啊 | [1] |
| 2 | 哈 | [2] |
| 3 | 哦 | [3] |
| 5 | 我 | [5] |
| 4 | 张 | [4] |
+----------+------------+-------------+
```
### keywords
convert_to