Java 正则表达式替换'text with N'text'

Question

Recently we realized that the SQL statement executed against an NVARCHAR column didn't append N before the search String.

SQL Statement is generated through some core business logic and we do not own that class. So now I need to append N before the search string in where clause.

N is used to specify a unicode string in SQL.

Example

Input String: Select * from table where key = 'text'

Output String: Select * from table where key = N'text'

I am trying some REGEX in Java where I can replace 'text' with N'text'

Answer 1

This is how you could do it with regex:

int start = input.start("''\w+''"); // for any character use "''.+''" and for alphanumeric use "''[\w\d]+''"
input = input.substring(0, start) + "N" + input.substring(start);

For more info on regex patterns use: https://www.rexegg.com/regex-quickstart.html