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merge from 1.5.3 (~r10943)

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git-svn-id: http://xe-core.googlecode.com/svn/trunk@10951 201d5d3c-b55e-5fd7-737f-ddc643e51545
This commit is contained in:
flyskyko 2012-07-27 02:47:10 +00:00
parent 7aa4798373
commit 54e3a72065
334 changed files with 13011 additions and 5561 deletions
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26
classes/db/queryparts/expression/SelectExpression.class.php
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@ -1,26 +1,40 @@
<?php
/**
* @class SelectExpression
* @author Arnia Software
* @brief Represents an expresion that appears in the select clause
* SelectExpression
* Represents an expresion that appears in the select clause
*
* @remarks
* $column_name can be:
* - a table column name
* - an sql function - like count(*)
* - an sql expression - substr(column_name, 1, 8) or score1 + score2
* $column_name is already escaped
*
* @author Arnia Software
* @package /classes/db/queryparts/expression
* @version 0.1
*/
class SelectExpression extends Expression {
/**
* column alias name
* @var string
*/
var $column_alias;
/**
* constructor
* @param string $column_name
* @param string $alias
* @return void
*/
function SelectExpression($column_name, $alias = NULL){
parent::Expression($column_name);
$this->column_alias = $alias;
}
/**
* Return column expression, ex) column as alias
* @return string
*/
function getExpression() {
return sprintf("%s%s", $this->column_name, $this->column_alias ? " as ".$this->column_alias : "");
}