If you take the length of a character in CODEUNITS, the output differs according to the CODEUNITS used as inputs to the string function.

如果使用CODEUNITS来获取字符的长度，则用作字符串函数输入的CODEUNITS的不同会导致输出的不同。

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This function, as mentioned in SQL standards, is used to find the length of a character string in character semantics.

如SQL标准中所述，此函数使用字符语义查找字符字符串的长度。

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The locale setting will cause the % ls format specifier in printf to call the wcsrtombs function in order to convert the wide character argument string into the locale-dependent multi-byte encoding.

语言环境设置会导致printf中的% l s格式说明符调用wcsrtombs函数以便于将宽字符的参数字符串转换成依赖语言环境的多字节编码。

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