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<?php
/**
* @copyright Copyright (c) 2017 Robin Appelman <robin@icewind.nl>
*
* @author Robin Appelman <robin@icewind.nl>
*
* @license GNU AGPL version 3 or any later version
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
namespace OCP\DB\QueryBuilder;
/**
* This class provides a builder for sql some functions
*
* @since 12.0.0
*/
interface IFunctionBuilder {
/**
* Calculates the MD5 hash of a given input
*
* @param mixed $input The input to be hashed
*
* @return IQueryFunction
* @since 12.0.0
*/
public function md5($input);
/**
* Combines two input strings
*
* @param mixed $x The first input string
* @param mixed $y The seccond input string
*
* @return IQueryFunction
* @since 12.0.0
*/
public function concat($x, $y);
/**
* Takes a substring from the input string
*
* @param mixed $input The input string
* @param mixed $start The start of the substring, note that counting starts at 1
* @param mixed $length The length of the substring
*
* @return IQueryFunction
* @since 12.0.0
*/
public function substring($input, $start, $length = null);
/**
* Takes the sum of all rows in a column
*
* @param mixed $field the column to sum
*
* @return IQueryFunction
* @since 12.0.0
*/
public function sum($field);
}