mirror of
https://github.com/Combodo/iTop.git
synced 2026-02-13 07:24:13 +01:00
702 lines
21 KiB
PHP
702 lines
21 KiB
PHP
<?php
|
|
// Copyright (C) 2010-2012 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/>
|
|
|
|
|
|
/**
|
|
* SQLQuery
|
|
* build an mySQL compatible SQL query
|
|
*
|
|
* @copyright Copyright (C) 2010-2012 Combodo SARL
|
|
* @license http://opensource.org/licenses/AGPL-3.0
|
|
*/
|
|
|
|
|
|
/**
|
|
* SQLQuery
|
|
* build an mySQL compatible SQL query
|
|
*
|
|
* @package iTopORM
|
|
*/
|
|
|
|
require_once('cmdbsource.class.inc.php');
|
|
|
|
|
|
class SQLQuery
|
|
{
|
|
private $m_SourceOQL = '';
|
|
private $m_sTable = '';
|
|
private $m_sTableAlias = '';
|
|
private $m_aFields = array();
|
|
private $m_aGroupBy = array();
|
|
private $m_oConditionExpr = null;
|
|
private $m_bToDelete = true; // The current table must be listed for deletion ?
|
|
private $m_aValues = array(); // Values to set in case of an update query
|
|
private $m_oSelectedIdField = null;
|
|
private $m_aJoinSelects = array();
|
|
private $m_bBeautifulQuery = false;
|
|
|
|
public function __construct($sTable, $sTableAlias, $aFields, $bToDelete = true, $aValues = array(), $oSelectedIdField = null)
|
|
{
|
|
// This check is not needed but for developping purposes
|
|
//if (!CMDBSource::IsTable($sTable))
|
|
//{
|
|
// throw new CoreException("Unknown table '$sTable'");
|
|
//}
|
|
|
|
// $aFields must be an array of "alias"=>"expr"
|
|
// $oConditionExpr must be a condition tree
|
|
// $aValues is an array of "alias"=>value
|
|
|
|
$this->m_sTable = $sTable;
|
|
$this->m_sTableAlias = $sTableAlias;
|
|
$this->m_aFields = $aFields;
|
|
$this->m_aGroupBy = null;
|
|
$this->m_oConditionExpr = null;
|
|
$this->m_bToDelete = $bToDelete;
|
|
$this->m_aValues = $aValues;
|
|
$this->m_oSelectedIdField = $oSelectedIdField;
|
|
}
|
|
|
|
/**
|
|
* Perform a deep clone (as opposed to "clone" which does copy a reference to the underlying objects
|
|
**/
|
|
public function DeepClone()
|
|
{
|
|
return unserialize(serialize($this));
|
|
}
|
|
|
|
public function GetTableAlias()
|
|
{
|
|
return $this->m_sTableAlias;
|
|
}
|
|
|
|
public function SetSourceOQL($sOQL)
|
|
{
|
|
$this->m_SourceOQL = $sOQL;
|
|
}
|
|
|
|
public function GetSourceOQL()
|
|
{
|
|
return $this->m_SourceOQL;
|
|
}
|
|
|
|
public function DisplayHtml()
|
|
{
|
|
if (count($this->m_aFields) == 0) $sFields = "";
|
|
else
|
|
{
|
|
$aFieldDesc = array();
|
|
foreach ($this->m_aFields as $sAlias => $oExpression)
|
|
{
|
|
$aFieldDesc[] = $oExpression->Render()." as <em>$sAlias</em>";
|
|
}
|
|
$sFields = " => ".implode(', ', $aFieldDesc);
|
|
}
|
|
echo "<b>$this->m_sTable</b>$sFields<br/>\n";
|
|
// #@# todo - display html of an expression tree
|
|
//$this->m_oConditionExpr->DisplayHtml()
|
|
if (count($this->m_aJoinSelects) > 0)
|
|
{
|
|
echo "Joined to...<br/>\n";
|
|
echo "<ul class=\"treeview\">\n";
|
|
foreach ($this->m_aJoinSelects as $aJoinInfo)
|
|
{
|
|
$sJoinType = $aJoinInfo["jointype"];
|
|
$oSQLQuery = $aJoinInfo["select"];
|
|
if (isset($aJoinInfo["on_expression"]))
|
|
{
|
|
$sOnCondition = $aJoinInfo["on_expression"]->Render();
|
|
|
|
echo "<li>Join '$sJoinType', ON ($sOnCondition)".$oSQLQuery->DisplayHtml()."</li>\n";
|
|
}
|
|
else
|
|
{
|
|
$sLeftField = $aJoinInfo["leftfield"];
|
|
$sRightField = $aJoinInfo["rightfield"];
|
|
$sRightTableAlias = $aJoinInfo["righttablealias"];
|
|
|
|
echo "<li>Join '$sJoinType', $sLeftField, $sRightTableAlias.$sRightField".$oSQLQuery->DisplayHtml()."</li>\n";
|
|
}
|
|
}
|
|
echo "</ul>";
|
|
}
|
|
$aFrom = array();
|
|
$aFields = array();
|
|
$aGroupBy = array();
|
|
$oCondition = null;
|
|
$aDelTables = array();
|
|
$aSetValues = array();
|
|
$aSelectedIdFields = array();
|
|
$this->privRender($aFrom, $aFields, $aGroupBy, $oCondition, $aDelTables, $aSetValues, $aSelectedIdFields);
|
|
echo "From ...<br/>\n";
|
|
echo "<pre style=\"font-size: smaller;\">\n";
|
|
print_r($aFrom);
|
|
echo "</pre>";
|
|
}
|
|
|
|
public function SetSelect($aExpressions)
|
|
{
|
|
$this->m_aFields = $aExpressions;
|
|
}
|
|
|
|
public function SetGroupBy($aExpressions)
|
|
{
|
|
$this->m_aGroupBy = $aExpressions;
|
|
}
|
|
|
|
public function SetCondition($oConditionExpr)
|
|
{
|
|
$this->m_oConditionExpr = $oConditionExpr;
|
|
}
|
|
|
|
public function AddCondition($oConditionExpr)
|
|
{
|
|
if (is_null($this->m_oConditionExpr))
|
|
{
|
|
$this->m_oConditionExpr = $oConditionExpr;
|
|
}
|
|
else
|
|
{
|
|
$this->m_oConditionExpr->LogAnd($oConditionExpr);
|
|
}
|
|
}
|
|
|
|
private function AddJoin($sJoinType, $oSQLQuery, $sLeftField, $sRightField, $sRightTableAlias = '')
|
|
{
|
|
assert((get_class($oSQLQuery) == __CLASS__) || is_subclass_of($oSQLQuery, __CLASS__));
|
|
// No need to check this here but for development purposes
|
|
//if (!CMDBSource::IsField($this->m_sTable, $sLeftField))
|
|
//{
|
|
// throw new CoreException("Unknown field '$sLeftField' in table '".$this->m_sTable);
|
|
//}
|
|
|
|
if (empty($sRightTableAlias))
|
|
{
|
|
$sRightTableAlias = $oSQLQuery->m_sTableAlias;
|
|
}
|
|
// #@# Could not be verified here because the namespace is unknown - do we need to check it there?
|
|
//
|
|
// if (!CMDBSource::IsField($sRightTable, $sRightField))
|
|
// {
|
|
// throw new CoreException("Unknown field '$sRightField' in table '".$sRightTable."'");
|
|
// }
|
|
$this->m_aJoinSelects[] = array(
|
|
"jointype" => $sJoinType,
|
|
"select" => $oSQLQuery,
|
|
"leftfield" => $sLeftField,
|
|
"rightfield" => $sRightField,
|
|
"righttablealias" => $sRightTableAlias
|
|
);
|
|
}
|
|
public function AddInnerJoin($oSQLQuery, $sLeftField, $sRightField, $sRightTable = '')
|
|
{
|
|
$this->AddJoin("inner", $oSQLQuery, $sLeftField, $sRightField, $sRightTable);
|
|
}
|
|
public function AddInnerJoinTree($oSQLQuery, $sLeftFieldLeft, $sLeftFieldRight, $sRightFieldLeft, $sRightFieldRight, $sRightTableAlias = '', $iOperatorCode = TREE_OPERATOR_BELOW)
|
|
{
|
|
assert((get_class($oSQLQuery) == __CLASS__) || is_subclass_of($oSQLQuery, __CLASS__));
|
|
if (empty($sRightTableAlias))
|
|
{
|
|
$sRightTableAlias = $oSQLQuery->m_sTableAlias;
|
|
}
|
|
$this->m_aJoinSelects[] = array(
|
|
"jointype" => 'inner_tree',
|
|
"select" => $oSQLQuery,
|
|
"leftfield" => $sLeftFieldLeft,
|
|
"rightfield" => $sLeftFieldRight,
|
|
"rightfield_left" => $sRightFieldLeft,
|
|
"rightfield_right" => $sRightFieldRight,
|
|
"righttablealias" => $sRightTableAlias,
|
|
"tree_operator" => $iOperatorCode);
|
|
}
|
|
public function AddLeftJoin($oSQLQuery, $sLeftField, $sRightField)
|
|
{
|
|
return $this->AddJoin("left", $oSQLQuery, $sLeftField, $sRightField);
|
|
}
|
|
|
|
public function AddInnerJoinEx(SQLQuery $oSQLQuery, Expression $oOnExpression)
|
|
{
|
|
$this->m_aJoinSelects[] = array(
|
|
"jointype" => 'inner',
|
|
"select" => $oSQLQuery,
|
|
"on_expression" => $oOnExpression
|
|
);
|
|
}
|
|
|
|
public function AddLeftJoinEx(SQLQuery $oSQLQuery, Expression $oOnExpression)
|
|
{
|
|
$this->m_aJoinSelects[] = array(
|
|
"jointype" => 'left',
|
|
"select" => $oSQLQuery,
|
|
"on_expression" => $oOnExpression
|
|
);
|
|
}
|
|
|
|
// Interface, build the SQL query
|
|
public function RenderDelete($aArgs = array())
|
|
{
|
|
// The goal will be to complete the list as we build the Joins
|
|
$aFrom = array();
|
|
$aFields = array();
|
|
$aGroupBy = array();
|
|
$oCondition = null;
|
|
$aDelTables = array();
|
|
$aSetValues = array();
|
|
$aSelectedIdFields = array();
|
|
$this->privRender($aFrom, $aFields, $aGroupBy, $oCondition, $aDelTables, $aSetValues, $aSelectedIdFields);
|
|
|
|
// Target: DELETE myAlias1, myAlias2 FROM t1 as myAlias1, t2 as myAlias2, t3 as topreserve WHERE ...
|
|
|
|
$sDelete = self::ClauseDelete($aDelTables);
|
|
$sFrom = self::ClauseFrom($aFrom);
|
|
// #@# safety net to redo ?
|
|
/*
|
|
if ($this->m_oConditionExpr->IsAny())
|
|
-- if (count($aConditions) == 0) --
|
|
{
|
|
throw new CoreException("Building a request wich will delete every object of a given table -looks suspicious- please use truncate instead...");
|
|
}
|
|
*/
|
|
if (is_null($oCondition))
|
|
{
|
|
// Delete all !!!
|
|
}
|
|
else
|
|
{
|
|
$sWhere = self::ClauseWhere($oCondition, $aArgs);
|
|
return "DELETE $sDelete FROM $sFrom WHERE $sWhere";
|
|
}
|
|
}
|
|
|
|
// Interface, build the SQL query
|
|
public function RenderUpdate($aArgs = array())
|
|
{
|
|
// The goal will be to complete the list as we build the Joins
|
|
$aFrom = array();
|
|
$aFields = array();
|
|
$aGroupBy = array();
|
|
$oCondition = null;
|
|
$aDelTables = array();
|
|
$aSetValues = array();
|
|
$aSelectedIdFields = array();
|
|
$this->privRender($aFrom, $aFields, $aGroupBy, $oCondition, $aDelTables, $aSetValues, $aSelectedIdFields);
|
|
$sFrom = self::ClauseFrom($aFrom);
|
|
$sValues = self::ClauseValues($aSetValues);
|
|
$sWhere = self::ClauseWhere($oCondition, $aArgs);
|
|
return "UPDATE $sFrom SET $sValues WHERE $sWhere";
|
|
}
|
|
|
|
// Interface, build the SQL query
|
|
public function RenderSelect($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;
|
|
|
|
// The goal will be to complete the lists as we build the Joins
|
|
$aFrom = array();
|
|
$aFields = array();
|
|
$aGroupBy = array();
|
|
$oCondition = null;
|
|
$aDelTables = array();
|
|
$aSetValues = array();
|
|
$aSelectedIdFields = array();
|
|
$this->privRender($aFrom, $aFields, $aGroupBy, $oCondition, $aDelTables, $aSetValues, $aSelectedIdFields);
|
|
|
|
$sFrom = self::ClauseFrom($aFrom, $sIndent);
|
|
$sWhere = self::ClauseWhere($oCondition, $aArgs);
|
|
if ($bGetCount)
|
|
{
|
|
if (count($aSelectedIdFields) > 0)
|
|
{
|
|
$aCountFields = array();
|
|
foreach ($aSelectedIdFields as $sFieldExpr)
|
|
{
|
|
$aCountFields[] = "COALESCE($sFieldExpr, 0)"; // Null values are excluded from the count
|
|
}
|
|
$sCountFields = implode(', ', $aCountFields);
|
|
$sSQL = "SELECT$sLineSep COUNT(DISTINCT $sCountFields) AS COUNT$sLineSep FROM $sFrom$sLineSep WHERE $sWhere";
|
|
}
|
|
else
|
|
{
|
|
$sSQL = "SELECT$sLineSep COUNT(*) AS COUNT$sLineSep FROM $sFrom$sLineSep WHERE $sWhere";
|
|
}
|
|
}
|
|
else
|
|
{
|
|
$sSelect = self::ClauseSelect($aFields);
|
|
$sOrderBy = self::ClauseOrderBy($aOrderBy);
|
|
if (!empty($sOrderBy))
|
|
{
|
|
$sOrderBy = "ORDER BY $sOrderBy";
|
|
}
|
|
if ($iLimitCount > 0)
|
|
{
|
|
$sLimit = 'LIMIT '.$iLimitStart.', '.$iLimitCount;
|
|
}
|
|
else
|
|
{
|
|
$sLimit = '';
|
|
}
|
|
$sSQL = "SELECT$sLineSep DISTINCT $sSelect$sLineSep FROM $sFrom$sLineSep WHERE $sWhere$sLineSep $sOrderBy$sLineSep $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;
|
|
|
|
// The goal will be to complete the lists as we build the Joins
|
|
$aFrom = array();
|
|
$aFields = array();
|
|
$aGroupBy = array();
|
|
$oCondition = null;
|
|
$aDelTables = array();
|
|
$aSetValues = array();
|
|
$aSelectedIdFields = array();
|
|
$this->privRender($aFrom, $aFields, $aGroupBy, $oCondition, $aDelTables, $aSetValues, $aSelectedIdFields);
|
|
|
|
$sSelect = self::ClauseSelect($aFields);
|
|
$sFrom = self::ClauseFrom($aFrom, $sIndent);
|
|
$sWhere = self::ClauseWhere($oCondition, $aArgs);
|
|
$sGroupBy = self::ClauseGroupBy($aGroupBy);
|
|
$sSQL = "SELECT $sSelect,$sLineSep COUNT(*) AS _itop_count_$sLineSep FROM $sFrom$sLineSep WHERE $sWhere$sLineSep GROUP BY $sGroupBy";
|
|
return $sSQL;
|
|
}
|
|
|
|
private static function ClauseSelect($aFields)
|
|
{
|
|
$aSelect = array();
|
|
foreach ($aFields as $sFieldAlias => $sSQLExpr)
|
|
{
|
|
$aSelect[] = "$sSQLExpr AS $sFieldAlias";
|
|
}
|
|
$sSelect = implode(', ', $aSelect);
|
|
return $sSelect;
|
|
}
|
|
|
|
private static function ClauseGroupBy($aGroupBy)
|
|
{
|
|
$sRes = implode(', ', $aGroupBy);
|
|
return $sRes;
|
|
}
|
|
|
|
private static function ClauseDelete($aDelTableAliases)
|
|
{
|
|
$aDelTables = array();
|
|
foreach ($aDelTableAliases as $sTableAlias)
|
|
{
|
|
$aDelTables[] = "$sTableAlias";
|
|
}
|
|
$sDelTables = implode(', ', $aDelTables);
|
|
return $sDelTables;
|
|
}
|
|
|
|
private static function ClauseFrom($aFrom, $sIndent = null, $iIndentLevel = 0)
|
|
{
|
|
$sLineBreakLong = $sIndent ? "\n".str_repeat($sIndent, $iIndentLevel + 1) : '';
|
|
$sLineBreak = $sIndent ? "\n".str_repeat($sIndent, $iIndentLevel) : '';
|
|
|
|
$sFrom = "";
|
|
foreach ($aFrom as $sTableAlias => $aJoinInfo)
|
|
{
|
|
switch ($aJoinInfo["jointype"])
|
|
{
|
|
case "first":
|
|
$sFrom .= $sLineBreakLong."`".$aJoinInfo["tablename"]."` AS `$sTableAlias`";
|
|
$sFrom .= self::ClauseFrom($aJoinInfo["subfrom"], $sIndent, $iIndentLevel + 1);
|
|
break;
|
|
case "inner":
|
|
case "inner_tree":
|
|
$sFrom .= $sLineBreak."INNER JOIN ($sLineBreakLong`".$aJoinInfo["tablename"]."` AS `$sTableAlias`";
|
|
$sFrom .= " ".self::ClauseFrom($aJoinInfo["subfrom"], $sIndent, $iIndentLevel + 1);
|
|
$sFrom .= $sLineBreak.") ON ".$aJoinInfo["joincondition"];
|
|
break;
|
|
case "left":
|
|
$sFrom .= $sLineBreak."LEFT JOIN ($sLineBreakLong`".$aJoinInfo["tablename"]."` AS `$sTableAlias`";
|
|
$sFrom .= " ".self::ClauseFrom($aJoinInfo["subfrom"], $sIndent, $iIndentLevel + 1);
|
|
$sFrom .= $sLineBreak.") ON ".$aJoinInfo["joincondition"];
|
|
break;
|
|
default:
|
|
throw new CoreException("Unknown jointype: '".$aJoinInfo["jointype"]."'");
|
|
}
|
|
}
|
|
return $sFrom;
|
|
}
|
|
|
|
private static function ClauseValues($aValues)
|
|
{
|
|
$aSetValues = array();
|
|
foreach ($aValues as $sFieldSpec => $value)
|
|
{
|
|
$aSetValues[] = "$sFieldSpec = ".CMDBSource::Quote($value);
|
|
}
|
|
$sSetValues = implode(', ', $aSetValues);
|
|
return $sSetValues;
|
|
}
|
|
|
|
private static function ClauseWhere($oConditionExpr, $aArgs = array())
|
|
{
|
|
if (is_null($oConditionExpr))
|
|
{
|
|
return '1';
|
|
}
|
|
else
|
|
{
|
|
return $oConditionExpr->Render($aArgs);
|
|
}
|
|
}
|
|
|
|
private static function ClauseOrderBy($aOrderBy)
|
|
{
|
|
$aOrderBySpec = array();
|
|
foreach($aOrderBy as $sFieldAlias => $bAscending)
|
|
{
|
|
// Note: sFieldAlias must have backticks around column aliases
|
|
$aOrderBySpec[] = $sFieldAlias.($bAscending ? " ASC" : " DESC");
|
|
}
|
|
$sOrderBy = implode(", ", $aOrderBySpec);
|
|
return $sOrderBy;
|
|
}
|
|
|
|
// Purpose: prepare the query data, once for all
|
|
private function privRender(&$aFrom, &$aFields, &$aGroupBy, &$oCondition, &$aDelTables, &$aSetValues, &$aSelectedIdFields)
|
|
{
|
|
$sTableAlias = $this->privRenderSingleTable($aFrom, $aFields, $aGroupBy, $aDelTables, $aSetValues, $aSelectedIdFields, '', array('jointype' => 'first'));
|
|
$oCondition = $this->m_oConditionExpr;
|
|
return $sTableAlias;
|
|
}
|
|
|
|
private function privRenderSingleTable(&$aFrom, &$aFields, &$aGroupBy, &$aDelTables, &$aSetValues, &$aSelectedIdFields, $sCallerAlias = '', $aJoinData)
|
|
{
|
|
$aActualTableFields = CMDBSource::GetTableFieldsList($this->m_sTable);
|
|
|
|
$aTranslationTable[$this->m_sTable]['*'] = $this->m_sTableAlias;
|
|
|
|
// Handle the various kinds of join (or first table in the list)
|
|
//
|
|
if (empty($aJoinData['righttablealias']))
|
|
{
|
|
$sRightTableAlias = $this->m_sTableAlias;
|
|
}
|
|
else
|
|
{
|
|
$sRightTableAlias = $aJoinData['righttablealias'];
|
|
}
|
|
switch ($aJoinData['jointype'])
|
|
{
|
|
case "first":
|
|
$aFrom[$this->m_sTableAlias] = array("jointype"=>"first", "tablename"=>$this->m_sTable, "joincondition"=>"");
|
|
break;
|
|
case "inner":
|
|
case "left":
|
|
if (isset($aJoinData["on_expression"]))
|
|
{
|
|
$sJoinCond = $aJoinData["on_expression"]->Render();
|
|
}
|
|
else
|
|
{
|
|
$sJoinCond = "`$sCallerAlias`.`{$aJoinData['leftfield']}` = `$sRightTableAlias`.`{$aJoinData['rightfield']}`";
|
|
}
|
|
$aFrom[$this->m_sTableAlias] = array("jointype"=>$aJoinData['jointype'], "tablename"=>$this->m_sTable, "joincondition"=>"$sJoinCond");
|
|
break;
|
|
case "inner_tree":
|
|
$sNodeLeft = "`$sCallerAlias`.`{$aJoinData['leftfield']}`";
|
|
$sNodeRight = "`$sCallerAlias`.`{$aJoinData['rightfield']}`";
|
|
$sRootLeft = "`$sRightTableAlias`.`{$aJoinData['rightfield_left']}`";
|
|
$sRootRight = "`$sRightTableAlias`.`{$aJoinData['rightfield_right']}`";
|
|
switch($aJoinData['tree_operator'])
|
|
{
|
|
case TREE_OPERATOR_BELOW:
|
|
$sJoinCond = "$sNodeLeft >= $sRootLeft AND $sNodeLeft <= $sRootRight";
|
|
break;
|
|
|
|
case TREE_OPERATOR_BELOW_STRICT:
|
|
$sJoinCond = "$sNodeLeft > $sRootLeft AND $sNodeLeft < $sRootRight";
|
|
break;
|
|
|
|
case TREE_OPERATOR_NOT_BELOW: // Complementary of 'BELOW'
|
|
$sJoinCond = "$sNodeLeft < $sRootLeft OR $sNodeLeft > $sRootRight";
|
|
break;
|
|
|
|
case TREE_OPERATOR_NOT_BELOW_STRICT: // Complementary of BELOW_STRICT
|
|
$sJoinCond = "$sNodeLeft <= $sRootLeft OR $sNodeLeft >= $sRootRight";
|
|
break;
|
|
|
|
case TREE_OPERATOR_ABOVE:
|
|
$sJoinCond = "$sNodeLeft <= $sRootLeft AND $sNodeRight >= $sRootRight";
|
|
break;
|
|
|
|
case TREE_OPERATOR_ABOVE_STRICT:
|
|
$sJoinCond = "$sNodeLeft < $sRootLeft AND $sNodeRight > $sRootRight";
|
|
break;
|
|
|
|
case TREE_OPERATOR_NOT_ABOVE: // Complementary of 'ABOVE'
|
|
$sJoinCond = "$sNodeLeft > $sRootLeft OR $sNodeRight < $sRootRight";
|
|
break;
|
|
|
|
case TREE_OPERATOR_NOT_ABOVE_STRICT: // Complementary of ABOVE_STRICT
|
|
$sJoinCond = "$sNodeLeft >= $sRootLeft OR $sNodeRight <= $sRootRight";
|
|
break;
|
|
|
|
}
|
|
$aFrom[$this->m_sTableAlias] = array("jointype"=>$aJoinData['jointype'], "tablename"=>$this->m_sTable, "joincondition"=>"$sJoinCond");
|
|
break;
|
|
}
|
|
|
|
// Given the alias, modify the fields and conditions
|
|
// before adding them into the current lists
|
|
//
|
|
foreach($this->m_aFields as $sAlias => $oExpression)
|
|
{
|
|
$aFields["`$sAlias`"] = $oExpression->Render();
|
|
}
|
|
if ($this->m_aGroupBy)
|
|
{
|
|
foreach($this->m_aGroupBy as $sAlias => $oExpression)
|
|
{
|
|
$aGroupBy["`$sAlias`"] = $oExpression->Render();
|
|
}
|
|
}
|
|
if ($this->m_bToDelete)
|
|
{
|
|
$aDelTables[] = "`{$this->m_sTableAlias}`";
|
|
}
|
|
foreach($this->m_aValues as $sFieldName=>$value)
|
|
{
|
|
$aSetValues["`{$this->m_sTableAlias}`.`$sFieldName`"] = $value; // quoted further!
|
|
}
|
|
|
|
if (!is_null($this->m_oSelectedIdField))
|
|
{
|
|
$aSelectedIdFields[] = $this->m_oSelectedIdField->Render();
|
|
}
|
|
|
|
// loop on joins, to complete the list of tables/fields/conditions
|
|
//
|
|
$aTempFrom = array(); // temporary subset of 'from' specs, to be grouped in the final query
|
|
foreach ($this->m_aJoinSelects as $aJoinData)
|
|
{
|
|
$oRightSelect = $aJoinData["select"];
|
|
|
|
$sJoinTableAlias = $oRightSelect->privRenderSingleTable($aTempFrom, $aFields, $aGroupBy, $aDelTables, $aSetValues, $aSelectedIdFields, $this->m_sTableAlias, $aJoinData);
|
|
}
|
|
$aFrom[$this->m_sTableAlias]['subfrom'] = $aTempFrom;
|
|
|
|
return $this->m_sTableAlias;
|
|
}
|
|
|
|
public function OptimizeJoins($aUsedTables, $bTopCall = true)
|
|
{
|
|
if ($bTopCall)
|
|
{
|
|
// Top call: complete the list of tables absolutely required to perform the right query
|
|
$this->CollectUsedTables($aUsedTables);
|
|
}
|
|
|
|
$aToDiscard = array();
|
|
foreach ($this->m_aJoinSelects as $i => $aJoinInfo)
|
|
{
|
|
$oSQLQuery = $aJoinInfo["select"];
|
|
$sTableAlias = $oSQLQuery->GetTableAlias();
|
|
if ($oSQLQuery->OptimizeJoins($aUsedTables, false) && !array_key_exists($sTableAlias, $aUsedTables))
|
|
{
|
|
$aToDiscard[] = $i;
|
|
}
|
|
}
|
|
foreach ($aToDiscard as $i)
|
|
{
|
|
unset($this->m_aJoinSelects[$i]);
|
|
}
|
|
|
|
return (count($this->m_aJoinSelects) == 0);
|
|
}
|
|
|
|
protected function CollectUsedTables(&$aTables)
|
|
{
|
|
$this->m_oConditionExpr->CollectUsedParents($aTables);
|
|
foreach($this->m_aFields as $sFieldAlias => $oField)
|
|
{
|
|
$oField->CollectUsedParents($aTables);
|
|
}
|
|
if ($this->m_aGroupBy)
|
|
{
|
|
foreach($this->m_aGroupBy as $sAlias => $oExpression)
|
|
{
|
|
$oExpression->CollectUsedParents($aTables);
|
|
}
|
|
}
|
|
if (!is_null($this->m_oSelectedIdField))
|
|
{
|
|
$this->m_oSelectedIdField->CollectUsedParents($aTables);
|
|
}
|
|
|
|
foreach ($this->m_aJoinSelects as $i => $aJoinInfo)
|
|
{
|
|
$oSQLQuery = $aJoinInfo["select"];
|
|
if ($oSQLQuery->HasRequiredTables($aTables))
|
|
{
|
|
// There is something required in the branch, then this node is a MUST
|
|
if (isset($aJoinInfo['righttablealias']))
|
|
{
|
|
$aTables[$aJoinInfo['righttablealias']] = true;
|
|
}
|
|
if (isset($aJoinInfo["on_expression"]))
|
|
{
|
|
$sJoinCond = $aJoinInfo["on_expression"]->CollectUsedParents($aTables);
|
|
}
|
|
}
|
|
}
|
|
|
|
return $aTables;
|
|
}
|
|
|
|
// Is required in the JOIN, and therefore we must ensure that the join expression will be valid
|
|
protected function HasRequiredTables(&$aTables)
|
|
{
|
|
$bResult = false;
|
|
if (array_key_exists($this->m_sTableAlias, $aTables))
|
|
{
|
|
$bResult = true;
|
|
}
|
|
foreach ($this->m_aJoinSelects as $i => $aJoinInfo)
|
|
{
|
|
$oSQLQuery = $aJoinInfo["select"];
|
|
if ($oSQLQuery->HasRequiredTables($aTables))
|
|
{
|
|
// There is something required in the branch, then this node is a MUST
|
|
if (isset($aJoinInfo['righttablealias']))
|
|
{
|
|
$aTables[$aJoinInfo['righttablealias']] = true;
|
|
}
|
|
if (isset($aJoinInfo["on_expression"]))
|
|
{
|
|
$sJoinCond = $aJoinInfo["on_expression"]->CollectUsedParents($aTables);
|
|
}
|
|
$bResult = true;
|
|
}
|
|
}
|
|
// None of the tables is in the list of required tables
|
|
return $bResult;
|
|
}
|
|
}
|
|
?>
|