lib/Doctrine/DBAL/Schema/Table.php
public function dropColumn($columnName)
    {
        $columnName = $this->normalizeIdentifier($columnName);
        unset($this->_columns[$columnName]);

        return $this;
    }
public function dropColumn($columnName)
    {
        $columnName = $this->normalizeIdentifier($columnName);
        unset($this->_columns[$columnName]);

        return $this;
    }
public function dropColumn ( $ columnName ) { $ columnName = $ this -> normalizeIdentifier ( $ columnName ) ; unset ( $ this -> _columns [ $ columnName ] ) ; return $ this ; }
Drops a Column from the Table.

@param string $columnName

@return self
Drops a Column from the Table .