chrmorandi / yii2-ldap

     *

     * @return $this the query object itself

     */

    public function select($columns)

    {

        if (!is_array($columns)) {

            $columns = preg_split('/\s*,\s*/', trim($columns), -1, PREG_SPLIT_NO_EMPTY);

        }

        $this->select = $columns;

        return $this;

    }

    /**

     * Add more columns to the select part of the query.

     *

     * @return $this the query object itself

     */

    public function from($nodes)

    {

        if (!is_array($nodes)) {

            $nodes = preg_split('/\s*,\s*/', trim($nodes), -1, PREG_SPLIT_NO_EMPTY);

        }

        $this->from = $nodes;

        return $this;

    }

    /**

     * Adds a filtering condition for a specific column and allow the user to choose a filter operator.

     * @return $this the query object itself

     * @see addGroupBy()

     */

    public function groupBy($columns)

    {

        if (!is_array($columns)) {

            $columns = preg_split('/\s*,\s*/', trim($columns), -1, PREG_SPLIT_NO_EMPTY);

        }

        $this->groupBy = $columns;

        return $this;

    }

    /**

     * Adds additional group-by columns to the existing ones.