liquibase-core/src/main/java/liquibase/util/StringUtil.java
public static String stripComments(String multiLineSQL) {
        return SqlParser.parse(multiLineSQL, true, false).toString().trim();
    }
public static String stripComments(String multiLineSQL) {
        return SqlParser.parse(multiLineSQL, true, false).toString().trim();
    }
Searches through a String which contains SQL code and strips out
any comments that are between \/**\/ or anything that matches
SP--SP<text>\n (to support the ANSI standard commenting of --
at the end of a line).

@return The String without the comments in