字符串函数的输入字符串数据可能拥有源字符串中的一些错误字符或无效字符。

The input string data to string functions may have wrong or invalid characters in the string that it is supplied with.

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前面提到，当用户在文本框中输入字符的时候将尝试调用suggest函数。

You've seen that the your text box will call for the suggest function to be invoked when a user enters a character in the text box.

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如 SQL 标准中所述，此函数返回输入字符串的八位字节长度或字节长度。

This function, as mentioned in SQL standard, returns the length of the input string in octets or bytes.

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