framework/db/QueryBuilder.php
public function renameColumn($table, $oldName, $newName)
    {
        return 'ALTER TABLE ' . $this->db->quoteTableName($table)
            . ' RENAME COLUMN ' . $this->db->quoteColumnName($oldName)
            . ' TO ' . $this->db->quoteColumnName($newName);
    }
public function renameColumn($table, $oldName, $newName)
    {
        return 'ALTER TABLE ' . $this->db->quoteTableName($table)
            . ' RENAME COLUMN ' . $this->db->quoteColumnName($oldName)
            . ' TO ' . $this->db->quoteColumnName($newName);
    }
Builds a SQL statement for renaming a column.
@param string $table the table whose column is to be renamed. The name will be properly quoted by the method.
@param string $oldName the old name of the column. The name will be properly quoted by the method.
@param string $newName the new name of the column. The name will be properly quoted by the method.
@return string the SQL statement for renaming a DB column.