import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class Example {
public static void main(String[] args) {
final String regex = "(select\\s+|([^,]+as)|from.+)";
final String string = "SELECT id, id_alarm, ne_name, extract(epoch from create_alarm_dt) as create_alarm_dt, extract(epoch from create_date) as create_date, extract(epoch from modify_date) as modify_date, create_user, modify_user, description FROM ecus.prog_ack_comments WHERE create_user='avpozov'\n\n"
+ " id,id_alarm, ne_name, extract(epoch from create_alarm_dt) as create_alarm_dt, extract(epoch from create_date) as create_date, extract(epoch from modify_date) as modify_date, create_user, modify_user, description";
final String subst = "";
final Pattern pattern = Pattern.compile(regex, Pattern.MULTILINE | Pattern.CASE_INSENSITIVE);
final Matcher matcher = pattern.matcher(string);
// The substituted value will be contained in the result variable
final String result = matcher.replaceAll(subst);
System.out.println("Substitution result: " + result);
}
}
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 Java, please visit: https://docs.oracle.com/javase/7/docs/api/java/util/regex/Pattern.html