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#942 OQL now supporting unions. Unions support polymorphism and can be used anywhere in the application.

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SVN:trunk[3631]
This commit is contained in:
Romain Quetiez
2015-07-08 17:10:40 +00:00
parent 20e4dbfc1d
commit baf54a7c02
40 changed files with 3985 additions and 3072 deletions
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166
core/sqlunionquery.class.inc.php Normal file
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<?php
// Copyright (C) 2015 Combodo SARL
//
// This file is part of iTop.
//
// iTop 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.
//
// iTop 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 iTop. If not, see <http://www.gnu.org/licenses/>
/**
* SQLUnionQuery
* build a mySQL compatible SQL query
*
* @copyright Copyright (C) 2015 Combodo SARL
* @license http://opensource.org/licenses/AGPL-3.0
*/
/**
* SQLUnionQuery
* build a mySQL compatible SQL query
*
* @package iTopORM
*/
class SQLUnionQuery extends SQLQuery
{
protected $aQueries;
protected $aGroupBy;
public function __construct($aQueries, $aGroupBy)
{
parent::__construct();
$this->aQueries = array();
foreach ($aQueries as $oSQLQuery)
{
$this->aQueries[] = $oSQLQuery->DeepClone();
}
$this->aGroupBy = $aGroupBy;
}
public function DisplayHtml()
{
$aQueriesHtml = array();
foreach ($this->aQueries as $oSQLQuery)
{
$aQueriesHtml[] = '<p>'.$oSQLQuery->DisplayHtml().'</p>';
}
echo implode('UNION', $aQueries);
}
public function AddInnerJoin($oSQLQuery, $sLeftField, $sRightField, $sRightTable = '')
{
foreach ($this->aQueries as $oSubSQLQuery)
{
$oSubSQLQuery->AddInnerJoin($oSQLQuery->DeepClone(), $sLeftField, $sRightField, $sRightTable = '');
}
}
public function RenderDelete($aArgs = array())
{
throw new Exception(__class__.'::'.__function__.'Not implemented !');
}
// Interface, build the SQL query
public function RenderUpdate($aArgs = array())
{
throw new Exception(__class__.'::'.__function__.'Not implemented !');
}
// Interface, build the SQL query
public function RenderSelect($aOrderBy = array(), $aArgs = array(), $iLimitCount = 0, $iLimitStart = 0, $bGetCount = false, $bBeautifulQuery = false)
{
$this->m_bBeautifulQuery = $bBeautifulQuery;
$sLineSep = $this->m_bBeautifulQuery ? "\n" : '';
$sIndent = $this->m_bBeautifulQuery ? " " : null;
$aSelects = array();
foreach ($this->aQueries as $oSQLQuery)
{
// Render SELECTS without orderby/limit/count
$aSelects[] = $oSQLQuery->RenderSelect(array(), $aArgs, 0, 0, false, $bBeautifulQuery);
}
$sSelects = '('.implode(")$sLineSep UNION$sLineSep(", $aSelects).')';
if ($bGetCount)
{
$sFrom = "($sLineSep$sSelects$sLineSep) as __selects__";
$sSQL = "SELECT$sLineSep COUNT(*) AS COUNT$sLineSep FROM $sFrom$sLineSep";
}
else
{
$aSelects = array();
foreach ($this->aQueries as $oSQLQuery)
{
// Render SELECT without orderby/limit/count
$aSelects[] = $oSQLQuery->RenderSelect(array(), $aArgs, 0, 0, false, $bBeautifulQuery);
}
$sSelect = $this->aQueries[0]->RenderSelectClause();
$sOrderBy = $this->aQueries[0]->RenderOrderByClause($aOrderBy);
if (!empty($sOrderBy))
{
$sOrderBy = "ORDER BY $sOrderBy$sLineSep";
}
if ($iLimitCount > 0)
{
$sLimit = 'LIMIT '.$iLimitStart.', '.$iLimitCount;
}
else
{
$sLimit = '';
}
$sSQL = $sSelects.$sLineSep.$sOrderBy.' '.$sLimit;
}
return $sSQL;
}
// Interface, build the SQL query
public function RenderGroupBy($aArgs = array(), $bBeautifulQuery = false)
{
$this->m_bBeautifulQuery = $bBeautifulQuery;
$sLineSep = $this->m_bBeautifulQuery ? "\n" : '';
$sIndent = $this->m_bBeautifulQuery ? " " : null;
$aSelects = array();
foreach ($this->aQueries as $oSQLQuery)
{
// Render SELECTS without orderby/limit/count
$aSelects[] = $oSQLQuery->RenderSelect(array(), $aArgs, 0, 0, false, $bBeautifulQuery);
}
$sSelects = '('.implode(")$sLineSep UNION$sLineSep(", $aSelects).')';
$sFrom = "($sLineSep$sSelects$sLineSep) as __selects__";
$aAliases = array();
foreach ($this->aGroupBy as $sGroupAlias => $trash)
{
$aAliases[] = "`$sGroupAlias`";
}
$sSelect = implode(', ', $aAliases);
$sGroupBy = implode(', ', $aAliases);
$sSQL = "SELECT $sSelect,$sLineSep COUNT(*) AS _itop_count_$sLineSep FROM $sFrom$sLineSep GROUP BY $sGroupBy";
return $sSQL;
}
public function OptimizeJoins($aUsedTables, $bTopCall = true)
{
foreach ($this->aQueries as $oSQLQuery)
{
$oSQLQuery->OptimizeJoins($aUsedTables);
}
}
}