jdbc-protolib/src/main/java/com/streamsets/pipeline/lib/jdbc/parser/sql/SQLParserUtils.java
private static String formatValue(String value) {
    // The value can either be null (if the IS keyword is present before it or just a NULL string with no quotes)
    if (value == null || NULL_STRING.equalsIgnoreCase(value)) {
      return null;
    }
    String returnValue = format(value);
    return returnValue.replaceAll("''", "'");
  }
private static String formatValue(String value) {
    // The value can either be null (if the IS keyword is present before it or just a NULL string with no quotes)
    if (value == null || NULL_STRING.equalsIgnoreCase(value)) {
      return null;
    }
    String returnValue = format(value);
    return returnValue.replaceAll("''", "'");
  }
Unescapes strings and returns them.