code: @Override
      public int executeUpdate() throws SQLException
      {
          checkClosed();
          if (!this.Query.isOfType(VoltSQL.TYPE_EXEC,VoltSQL.TYPE_UPDATE)) {
              throw SQLError.get(SQLError.ILLEGAL_STATEMENT, this.Query.toSqlString());
          }
          int result = this.executeUpdate(this.Query.getExecutableQuery(this.parameters));
          this.parameters = this.Query.getParameterArray();
          return result;
      }
docs: Executes the SQL statement in this PreparedStatement object, which must be an SQL Data Manipulation Language (DML) statement, such as INSERT, UPDATE or DELETE; or an SQL statement that returns nothing, such as a DDL statement.