[doc]str func #1860
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[doc]str func #1860
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morrySnow
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Jan 17, 2025
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| ### example | ||
| `NOT_NULL_OR_EMPTY (<str>)` |
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使用code block 而不是 inline code
Suggested change
| `NOT_NULL_OR_EMPTY (<str>)` | |
| ```sql | |
| NOT_NULL_OR_EMPTY (<str>) | |
| ``` |
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| ### example | ||
| `VARCHAR sub_replace(<str>, <new_str>, <start[, len]>)` |
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不要带类型
Suggested change
| `VARCHAR sub_replace(<str>, <new_str>, <start[, len]>)` | |
| ```sql | |
| sub_replace(<str>, <new_str>, <start> [, <len> ]) | |
| ``` |
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| ## 举例 | ||
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| ``` | ||
| mysql> select sub_replace("this is origin str","NEW-STR",1); | ||
| select sub_replace("this is origin str","NEW-STR",1); |
| | -- | -- | | ||
| | `<str>` | 要进行替换操作的目标字符串 | | ||
| | `<new_str>` | 用于替换的目标字符串 | | ||
| | `<start[, len]>` | start 表示替换操作开始的位置，可选参数，表示要替换的子字符串长度 | |
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start 和 len 是两个参数吧？
start 和 len 都可选吗？如果是的话应该是 [ ,<start> [ , <len> ] ]
如果只有 len 可选，应该是 ,<start> [ , <len> ]
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