大家好，又見面了，我是你們的朋友全棧君。
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?
解決方案
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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