using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"(\bONLY\h+)(.+)(\R.*?fk)_\S+(.+?\bREFERENCES\h+)([^(]+)";
string substitution = @"$1$2$3_$2_$5$4$5";
string input = @"ALTER TABLE ONLY document_labels
ADD CONSTRAINT fk_g71qgs6l2ufr3170u44j5fpk3 FOREIGN KEY (label_id) REFERENCES application_value(id);
ALTER TABLE ONLY rule_group_functionality_mapping
ADD CONSTRAINT fk_g8twyunj9bm096sqywdi8rcx8 FOREIGN KEY (rule_group) REFERENCES application_value(id);
ALTER TABLE ONLY time_track
ADD CONSTRAINT fk_gmpyguqbpm1ndjjsxvt03wq4g FOREIGN KEY (user_id) REFERENCES user_account(user_id);";
Regex regex = new Regex(pattern);
string result = regex.Replace(input, substitution);
}
}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for C#, please visit: https://msdn.microsoft.com/en-us/library/system.text.regularexpressions.regex(v=vs.110).aspx