code: public static function createColumn($strTableName, $strColumnName, $strType, $blnAllowSystemCol = false)
      {
          self::checkColumnDoesNotExist($strTableName, $strColumnName, $blnAllowSystemCol);
          self::getDB()->execute(
              sprintf(
                  self::STATEMENT_CREATE_COLUMN,
                  $strTableName,
                  $strColumnName,
                  $strType
              )
          );
      }
docs: Add a column to a table.
  
  Throws Exception if the table does not exist, the column name is invalid or the column already exists.
  
  @param string  $strTableName      The name of the table to add the column to.
  
  @param string  $strColumnName     The name of the new column.
  
  @param string  $strType           The SQL type notation of the new column.
  
  @param boolean $blnAllowSystemCol If this is set to true, no system column name checking will be applied.
  
  @return void