200 lines
4.7 KiB
PHP
200 lines
4.7 KiB
PHP
<?php
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/**
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* @package Joomla.Platform
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* @subpackage Database
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*
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* @copyright Copyright (C) 2005 - 2013 Open Source Matters, Inc. All rights reserved.
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* @license GNU General Public License version 2 or later; see LICENSE
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*/
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defined('JPATH_PLATFORM') or die;
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/**
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* Query Building Class.
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*
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* @package Joomla.Platform
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* @subpackage Database
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* @since 11.1
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*/
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class JDatabaseQuerySqlsrv extends JDatabaseQuery
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{
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/**
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* The character(s) used to quote SQL statement names such as table names or field names,
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* etc. The child classes should define this as necessary. If a single character string the
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* same character is used for both sides of the quoted name, else the first character will be
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* used for the opening quote and the second for the closing quote.
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*
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* @var string
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*
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* @since 11.1
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*/
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protected $name_quotes = '`';
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/**
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* The null or zero representation of a timestamp for the database driver. This should be
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* defined in child classes to hold the appropriate value for the engine.
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*
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* @var string
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*
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* @since 11.1
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*/
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protected $null_date = '1900-01-01 00:00:00';
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/**
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* Magic function to convert the query to a string.
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*
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* @return string The completed query.
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*
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* @since 11.1
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*/
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public function __toString()
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{
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$query = '';
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switch ($this->type)
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{
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case 'insert':
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$query .= (string) $this->insert;
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// Set method
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if ($this->set)
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{
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$query .= (string) $this->set;
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}
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// Columns-Values method
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elseif ($this->values)
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{
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if ($this->columns)
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{
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$query .= (string) $this->columns;
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}
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$elements = $this->insert->getElements();
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$tableName = array_shift($elements);
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$query .= 'VALUES ';
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$query .= (string) $this->values;
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if ($this->autoIncrementField)
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{
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$query = 'SET IDENTITY_INSERT ' . $tableName . ' ON;' . $query . 'SET IDENTITY_INSERT ' . $tableName . ' OFF;';
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}
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if ($this->where)
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{
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$query .= (string) $this->where;
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}
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}
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break;
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default:
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$query = parent::__toString();
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break;
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}
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return $query;
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}
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/**
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* Casts a value to a char.
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*
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* Ensure that the value is properly quoted before passing to the method.
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*
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* @param string $value The value to cast as a char.
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*
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* @return string Returns the cast value.
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*
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* @since 11.1
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*/
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public function castAsChar($value)
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{
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return 'CAST(' . $value . ' as NVARCHAR(10))';
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}
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/**
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* Gets the function to determine the length of a character string.
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*
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* @param string $field A value.
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* @param string $operator Comparison operator between charLength integer value and $condition
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* @param string $condition Integer value to compare charLength with.
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*
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* @return string The required char length call.
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*
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* @since 11.1
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*/
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public function charLength($field, $operator = null, $condition = null)
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{
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return 'DATALENGTH(' . $field . ')' . (isset($operator) && isset($condition) ? ' ' . $operator . ' ' . $condition : '');
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}
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/**
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* Concatenates an array of column names or values.
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*
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* @param array $values An array of values to concatenate.
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* @param string $separator As separator to place between each value.
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*
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* @return string The concatenated values.
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*
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* @since 11.1
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*/
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public function concatenate($values, $separator = null)
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{
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if ($separator)
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{
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return '(' . implode('+' . $this->quote($separator) . '+', $values) . ')';
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}
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else
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{
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return '(' . implode('+', $values) . ')';
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}
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}
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/**
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* Gets the current date and time.
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*
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* @return string
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*
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* @since 11.1
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*/
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public function currentTimestamp()
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{
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return 'GETDATE()';
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}
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/**
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* Get the length of a string in bytes.
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*
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* @param string $value The string to measure.
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*
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* @return integer
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*
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* @since 11.1
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*/
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public function length($value)
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{
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return 'LEN(' . $value . ')';
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}
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/**
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* Add to the current date and time.
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* Usage:
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* $query->select($query->dateAdd());
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* Prefixing the interval with a - (negative sign) will cause subtraction to be used.
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*
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* @param datetime $date The date to add to; type may be time or datetime.
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* @param string $interval The string representation of the appropriate number of units
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* @param string $datePart The part of the date to perform the addition on
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*
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* @return string The string with the appropriate sql for addition of dates
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*
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* @since 13.1
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* @note Not all drivers support all units.
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* @link http://msdn.microsoft.com/en-us/library/ms186819.aspx for more information
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*/
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public function dateAdd($date, $interval, $datePart)
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{
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return "DATEADD('" . $datePart . "', '" . $interval . "', '" . $date . "'" . ')';
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}
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}
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