quotename mysql,我如何在mySQL中创建一个QUOTENAME函数

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I would like to create a QUOTENAME() function in mySQL like the one that exists in M$ SQL Server.

This is what it does:

QUOTENAME returns a Unicode string with the delimiters added to make the input string a valid identifier. The QUOTENAME function uses this syntax:

QUOTENAME ( ‘string’ [ , ‘delimiter’ ] )

You pass QUOTENAME a string to be delimited and a one-character string to use as the delimiter. The delimiter can be a square bracket or a single or double quotation mark.

Is this even possible?

解决方案

You could start with something like this – building off of eggyal’s comment

DROP FUNCTION IF EXISTS QUOTENAME;

CREATE FUNCTION QUOTENAME (s varchar(50), d CHAR(1))

RETURNS VARCHAR(52)

RETURN CONCAT (d, REPLACE(s, d, CONCAT(d,d)), d);

And then add your special cases and additional functionality.

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