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<?php
/**
* @copyright Copyright (c) 2017 Robin Appelman <robin@icewind.nl>
*
* @author Joas Schilling <coding@schilljs.com>
* @author Morris Jobke <hey@morrisjobke.de>
* @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 string|ILiteral|IParameter|IQueryFunction $input The input to be hashed
*
* @return IQueryFunction
* @since 12.0.0
*/
public function md5($input): IQueryFunction;
/**
* Combines two input strings
*
* @param string|ILiteral|IParameter|IQueryFunction $x Expressions or literal strings
* @param string|ILiteral|IParameter|IQueryFunction ...$exprs Expressions or literal strings
*
* @return IQueryFunction
* @since 12.0.0
*/
public function concat($x, ...$expr): IQueryFunction;
/**
* Returns a string which is the concatenation of all non-NULL values of X
*
* Usage examples:
*
* groupConcat('column') -- with comma as separator (default separator)
*
* groupConcat('column', ';') -- with different separator
*
* @param string|IQueryFunction $expr The expression to group
* @param string|null $separator The separator
* @return IQueryFunction
* @since 24.0.0
*/
public function groupConcat($expr, ?string $separator = ','): IQueryFunction;
/**
* Takes a substring from the input string
*
* @param string|ILiteral|IParameter|IQueryFunction $input The input string
* @param string|ILiteral|IParameter|IQueryFunction $start The start of the substring, note that counting starts at 1
* @param null|ILiteral|IParameter|IQueryFunction $length The length of the substring
*
* @return IQueryFunction
* @since 12.0.0
*/
public function substring($input, $start, $length = null): IQueryFunction;
/**
* Takes the sum of all rows in a column
*
* @param string|ILiteral|IParameter|IQueryFunction $field the column to sum
*
* @return IQueryFunction
* @since 12.0.0
*/
public function sum($field): IQueryFunction;
/**
* Transforms a string field or value to lower case
*
* @param string|ILiteral|IParameter|IQueryFunction $field
* @return IQueryFunction
* @since 14.0.0
*/
public function lower($field): IQueryFunction;
/**
* @param string|ILiteral|IParameter|IQueryFunction $x The first input field or number
* @param string|ILiteral|IParameter|IQueryFunction $y The second input field or number
* @return IQueryFunction
* @since 14.0.0
*/
public function add($x, $y): IQueryFunction;
/**
* @param string|ILiteral|IParameter|IQueryFunction $x The first input field or number
* @param string|ILiteral|IParameter|IQueryFunction $y The second input field or number
* @return IQueryFunction
* @since 14.0.0
*/
public function subtract($x, $y): IQueryFunction;
/**
* @param string|ILiteral|IParameter|IQueryFunction $count The input to be counted
* @param string $alias Alias for the counter
*
* @return IQueryFunction
* @since 14.0.0
*/
public function count($count = '', $alias = ''): IQueryFunction;
/**
* Takes the maximum of all rows in a column
*
* If you want to get the maximum value of multiple columns in the same row, use `greatest` instead
*
* @param string|ILiteral|IParameter|IQueryFunction $field the column to maximum
*
* @return IQueryFunction
* @since 18.0.0
*/
public function max($field): IQueryFunction;
/**
* Takes the minimum of all rows in a column
*
* If you want to get the minimum value of multiple columns in the same row, use `least` instead
*
* @param string|ILiteral|IParameter|IQueryFunction $field the column to minimum
*
* @return IQueryFunction
* @since 18.0.0
*/
public function min($field): IQueryFunction;
/**
* Takes the maximum of multiple values
*
* If you want to get the maximum value of all rows in a column, use `max` instead
*
* @param string|ILiteral|IParameter|IQueryFunction $x
* @param string|ILiteral|IParameter|IQueryFunction $y
* @return IQueryFunction
* @since 18.0.0
*/
public function greatest($x, $y): IQueryFunction;
/**
* Takes the minimum of multiple values
*
* If you want to get the minimum value of all rows in a column, use `min` instead
*
* @param string|ILiteral|IParameter|IQueryFunction $x
* @param string|ILiteral|IParameter|IQueryFunction $y
* @return IQueryFunction
* @since 18.0.0
*/
public function least($x, $y): IQueryFunction;
}
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