SqlEntityProcessor should do something (like throw an error) if DOT_PATTERN is not matched

      Object val = context.resolve("dataimporter.delta." + primaryKey);
      if (val == null) {
        Matcher m = DOT_PATTERN.matcher(primaryKey);
        if (m.find()) {
          val = context.resolve("dataimporter.delta." + m.group(1));
        }
      }
      sb.append(primaryKey).append(" = ");
      if (val instanceof Number) {
        sb.append(val.toString());
      } else {
        sb.append("'").append(val.toString()).append("'");
      }