mirror of
https://github.com/Combodo/iTop.git
synced 2026-02-13 15:34:12 +01:00
743 lines
21 KiB
PHP
743 lines
21 KiB
PHP
<?php
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// Copyright (C) 2015-2024 Combodo SAS
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//
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// This file is part of iTop.
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//
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// iTop is free software; you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// iTop is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with iTop. If not, see <http://www.gnu.org/licenses/>
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/**
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* SQLObjectQuery
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* build a mySQL compatible SQL query
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*
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* @copyright Copyright (C) 2015-2024 Combodo SAS
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* @license http://opensource.org/licenses/AGPL-3.0
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*/
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/**
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* SQLObjectQuery
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* build a mySQL compatible SQL query
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*
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* @package iTopORM
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*/
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class SQLObjectQuery extends SQLQuery
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{
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public $m_aContextData = null;
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public $m_iOriginalTableCount = 0;
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private $m_sTable = '';
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private $m_sTableAlias = '';
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private $m_aFields = array();
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private $m_aGroupBy = array();
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private $m_oConditionExpr = null;
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private $m_bToDelete = true; // The current table must be listed for deletion ?
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private $m_aValues = array(); // Values to set in case of an update query
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private $m_oSelectedIdField = null;
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private $m_aJoinSelects = array();
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protected $m_bBeautifulQuery = false;
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// Data set by PrepareRendering()
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private $__aFrom;
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private $__aFields;
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private $__aGroupBy;
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private $__aDelTables;
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private $__aSetValues;
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private $__aSelectedIdFields;
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public function __construct($sTable, $sTableAlias, $aFields, $bToDelete = true, $aValues = array(), $oSelectedIdField = null)
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{
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parent::__construct();
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// This check is not needed but for developping purposes
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//if (!CMDBSource::IsTable($sTable))
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//{
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// throw new CoreException("Unknown table '$sTable'");
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//}
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// $aFields must be an array of "alias"=>"expr"
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// $oConditionExpr must be a condition tree
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// $aValues is an array of "alias"=>value
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$this->m_sTable = $sTable;
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$this->m_sTableAlias = $sTableAlias;
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$this->m_aFields = $aFields;
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$this->m_aGroupBy = null;
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$this->m_oConditionExpr = null;
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$this->m_bToDelete = $bToDelete;
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$this->m_aValues = $aValues;
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$this->m_oSelectedIdField = $oSelectedIdField;
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}
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public function GetTableAlias()
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{
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return $this->m_sTableAlias;
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}
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public function DisplayHtml()
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{
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if (count($this->m_aFields) == 0) $sFields = "";
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else
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{
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$aFieldDesc = array();
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foreach ($this->m_aFields as $sAlias => $oExpression)
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{
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$aFieldDesc[] = $oExpression->RenderExpression(false)." as <em>$sAlias</em>";
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}
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$sFields = " => ".implode(', ', $aFieldDesc);
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}
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echo "<b>$this->m_sTable</b>$sFields<br/>\n";
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// #@# todo - display html of an expression tree
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//$this->m_oConditionExpr->DisplayHtml()
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if (count($this->m_aJoinSelects) > 0)
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{
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echo "Joined to...<br/>\n";
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echo "<ul class=\"treeview\">\n";
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foreach ($this->m_aJoinSelects as $aJoinInfo)
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{
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$sJoinType = $aJoinInfo["jointype"];
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$oSQLQuery = $aJoinInfo["select"];
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if (isset($aJoinInfo["on_expression"]))
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{
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$sOnCondition = $aJoinInfo["on_expression"]->RenderExpression(false);
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echo "<li>Join '$sJoinType', ON ($sOnCondition)".$oSQLQuery->DisplayHtml()."</li>\n";
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}
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else
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{
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$sLeftField = $aJoinInfo["leftfield"];
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$sRightField = $aJoinInfo["rightfield"];
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$sRightTableAlias = $aJoinInfo["righttablealias"];
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echo "<li>Join '$sJoinType', $sLeftField, $sRightTableAlias.$sRightField".$oSQLQuery->DisplayHtml()."</li>\n";
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}
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}
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echo "</ul>";
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}
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$this->PrepareRendering();
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echo "From ...<br/>\n";
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echo "<pre style=\"font-size: smaller;\">\n";
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print_r($this->__aFrom);
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echo "</pre>";
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}
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public function SetSelect($aExpressions)
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{
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$this->m_aFields = $aExpressions;
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}
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public function SortSelectedFields()
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{
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ksort($this->m_aFields);
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}
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public function AddSelect($sAlias, $oExpression)
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{
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$this->m_aFields[$sAlias] = $oExpression;
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}
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public function SetGroupBy($aExpressions)
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{
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$this->m_aGroupBy = $aExpressions;
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}
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public function SetCondition($oConditionExpr)
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{
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$this->m_oConditionExpr = $oConditionExpr;
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}
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public function AddCondition($oConditionExpr)
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{
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if (is_null($this->m_oConditionExpr))
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{
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$this->m_oConditionExpr = $oConditionExpr;
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}
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else
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{
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$this->m_oConditionExpr = $this->m_oConditionExpr->LogAnd($oConditionExpr);
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}
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}
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private function AddJoin($sJoinType, $oSQLQuery, $sLeftField, $sRightField, $sRightTableAlias = '')
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{
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assert((get_class($oSQLQuery) == __CLASS__) || is_subclass_of($oSQLQuery, __CLASS__));
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// No need to check this here but for development purposes
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//if (!CMDBSource::IsField($this->m_sTable, $sLeftField))
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//{
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// throw new CoreException("Unknown field '$sLeftField' in table '".$this->m_sTable);
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//}
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if (empty($sRightTableAlias))
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{
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$sRightTableAlias = $oSQLQuery->m_sTableAlias;
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}
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// #@# Could not be verified here because the namespace is unknown - do we need to check it there?
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//
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// if (!CMDBSource::IsField($sRightTable, $sRightField))
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// {
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// throw new CoreException("Unknown field '$sRightField' in table '".$sRightTable."'");
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// }
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$this->m_aJoinSelects[] = array(
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"jointype" => $sJoinType,
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"select" => $oSQLQuery,
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"leftfield" => $sLeftField,
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"rightfield" => $sRightField,
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"righttablealias" => $sRightTableAlias
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);
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}
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public function AddInnerJoin($oSQLQuery, $sLeftField, $sRightField, $sRightTable = '')
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{
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$this->AddJoin("inner", $oSQLQuery, $sLeftField, $sRightField, $sRightTable);
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}
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public function AddInnerJoinTree($oSQLQuery, $sLeftFieldLeft, $sLeftFieldRight, $sRightFieldLeft, $sRightFieldRight, $sRightTableAlias = '', $iOperatorCode = TREE_OPERATOR_BELOW, $bInvertOnClause = false)
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{
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assert((get_class($oSQLQuery) == __CLASS__) || is_subclass_of($oSQLQuery, __CLASS__));
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if (empty($sRightTableAlias))
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{
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$sRightTableAlias = $oSQLQuery->m_sTableAlias;
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}
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$this->m_aJoinSelects[] = array(
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"jointype" => 'inner_tree',
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"select" => $oSQLQuery,
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"leftfield" => $sLeftFieldLeft,
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"rightfield" => $sLeftFieldRight,
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"rightfield_left" => $sRightFieldLeft,
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"rightfield_right" => $sRightFieldRight,
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"righttablealias" => $sRightTableAlias,
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"tree_operator" => $iOperatorCode,
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'invert_on_clause' => $bInvertOnClause
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);
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}
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public function AddLeftJoin($oSQLQuery, $sLeftField, $sRightField)
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{
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return $this->AddJoin("left", $oSQLQuery, $sLeftField, $sRightField);
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}
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public function AddInnerJoinEx(SQLQuery $oSQLQuery, Expression $oOnExpression)
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{
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$this->m_aJoinSelects[] = array(
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"jointype" => 'inner',
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"select" => $oSQLQuery,
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"on_expression" => $oOnExpression
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);
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}
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public function AddLeftJoinEx(SQLQuery $oSQLQuery, Expression $oOnExpression)
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{
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$this->m_aJoinSelects[] = array(
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"jointype" => 'left',
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"select" => $oSQLQuery,
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"on_expression" => $oOnExpression
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);
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}
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// Interface, build the SQL query
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/**
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* @param array $aArgs
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* @return string
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* @throws CoreException
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*/
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public function RenderDelete($aArgs = array())
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{
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$this->PrepareRendering();
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// Target: DELETE myAlias1, myAlias2 FROM t1 as myAlias1, t2 as myAlias2, t3 as topreserve WHERE ...
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$sDelete = self::ClauseDelete($this->__aDelTables);
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$sFrom = self::ClauseFrom($this->__aFrom);
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// #@# safety net to redo ?
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/*
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if ($this->m_oConditionExpr->IsAny())
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-- if (count($aConditions) == 0) --
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{
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throw new CoreException("Building a request wich will delete every object of a given table -looks suspicious- please use truncate instead...");
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}
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*/
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if (is_null($this->m_oConditionExpr))
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{
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// Delete all !!!
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}
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else
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{
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$sWhere = self::ClauseWhere($this->m_oConditionExpr, $aArgs);
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return "DELETE $sDelete FROM $sFrom WHERE $sWhere";
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}
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return '';
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}
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/**
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* Needed for the unions
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*/
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public function RenderSelectClause()
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{
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$this->PrepareRendering();
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$sSelect = self::ClauseSelect($this->__aFields);
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return $sSelect;
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}
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/**
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* Needed for the unions
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* @param $aOrderBy
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* @return string
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* @throws CoreException
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*/
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public function RenderOrderByClause($aOrderBy)
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{
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$this->PrepareRendering();
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$sOrderBy = self::ClauseOrderBy($aOrderBy, $this->__aFields);
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return $sOrderBy;
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}
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// Interface, build the SQL query
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/**
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* @param array $aArgs
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* @return string
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* @throws CoreException
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*/
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public function RenderUpdate($aArgs = array())
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{
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$this->PrepareRendering();
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$sFrom = self::ClauseFrom($this->__aFrom);
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$sValues = self::ClauseValues($this->__aSetValues);
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$sWhere = self::ClauseWhere($this->m_oConditionExpr, $aArgs);
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return "UPDATE $sFrom SET $sValues WHERE $sWhere";
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}
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/**
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* Generate an INSERT statement.
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* Note : unlike `RenderUpdate` and `RenderSelect`, it is limited to one and only one table.
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*
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*
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* @param array $aArgs
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* @return string
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* @throws CoreException
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*/
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public function RenderInsert($aArgs = array())
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{
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$this->PrepareRendering();
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$aJoinInfo = reset($this->__aFrom);
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if ($aJoinInfo['jointype'] != 'first' || count($this->__aFrom) > 1)
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{
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throw new CoreException('Cannot render insert');
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}
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$sFrom = "`{$aJoinInfo['tablename']}`";
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$sColList = '`'.implode('`,`', array_keys($this->m_aValues)).'`';
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$aSetValues = array();
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foreach ($this->__aSetValues as $sFieldSpec => $value)
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{
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$aSetValues[] = CMDBSource::Quote($value);
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}
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$sValues = implode(',', $aSetValues);
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return "INSERT INTO $sFrom ($sColList) VALUES ($sValues)";
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}
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/**
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* @param array $aOrderBy
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* @param array $aArgs
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* @param int $iLimitCount
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* @param int $iLimitStart
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* @param bool $bGetCount
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* @param bool $bBeautifulQuery
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* @return string
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* @throws CoreException
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*/
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public function RenderSelect($aOrderBy = array(), $aArgs = array(), $iLimitCount = 0, $iLimitStart = 0, $bGetCount = false, $bBeautifulQuery = false)
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{
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$this->m_bBeautifulQuery = $bBeautifulQuery;
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$sLineSep = $this->m_bBeautifulQuery ? "\n" : '';
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$sIndent = $this->m_bBeautifulQuery ? " " : null;
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$this->PrepareRendering();
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$sFrom = self::ClauseFrom($this->__aFrom, $sIndent);
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$sWhere = self::ClauseWhere($this->m_oConditionExpr, $aArgs);
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// Sanity
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$iLimitCount = (int)$iLimitCount;
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if ($iLimitCount > 0)
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{
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// Sanity
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$iLimitStart = (int)$iLimitStart;
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$sLimit = 'LIMIT '.$iLimitStart.', '.$iLimitCount;
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}
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else
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{
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$sLimit = '';
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}
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if ($bGetCount)
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{
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if (count($this->__aSelectedIdFields) > 0)
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{
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$aCountFields = [];
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$aCountI = [];
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$i = 0;
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foreach ($this->__aSelectedIdFields as $sFieldExpr) {
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$aCountFields[] = "COALESCE($sFieldExpr, 0) AS idCount$i"; // Null values are excluded from the count
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$aCountI[] = 'idCount'.$i++;
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}
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$sCountFields = implode(', ', $aCountFields);
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$sCountI = implode('+ ', $aCountI);
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// Count can be limited for performance reason, in this case the total amount is not important,
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// we only need to know if the number of entries is greater than a certain amount.
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$sSQL = "SELECT COUNT(*) AS COUNT FROM (SELECT$sLineSep DISTINCT $sCountFields $sLineSep FROM $sFrom$sLineSep WHERE $sWhere $sLimit) AS _alderaan_ WHERE $sCountI>0";
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}
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else
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{
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$sSQL = "SELECT COUNT(*) AS COUNT FROM (SELECT$sLineSep 1 $sLineSep FROM $sFrom$sLineSep WHERE $sWhere $sLimit) AS _alderaan_";
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}
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}
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else
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{
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$sSelect = self::ClauseSelect($this->__aFields, $sLineSep);
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$sOrderBy = self::ClauseOrderBy($aOrderBy, $this->__aFields);
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if (!empty($sOrderBy))
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{
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$sOrderBy = "ORDER BY $sOrderBy$sLineSep";
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}
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$sSQL = "SELECT$sLineSep DISTINCT $sSelect$sLineSep FROM $sFrom$sLineSep WHERE $sWhere$sLineSep $sOrderBy $sLimit";
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}
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return $sSQL;
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}
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// Interface, build the SQL query
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/**
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* @param array $aArgs
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* @param bool $bBeautifulQuery
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* @param array $aOrderBy
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* @param int $iLimitCount
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* @param int $iLimitStart
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* @return string
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* @throws CoreException
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*/
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public function RenderGroupBy($aArgs = array(), $bBeautifulQuery = false, $aOrderBy = array(), $iLimitCount = 0, $iLimitStart = 0)
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{
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$this->m_bBeautifulQuery = $bBeautifulQuery;
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$sLineSep = $this->m_bBeautifulQuery ? "\n" : '';
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$sIndent = $this->m_bBeautifulQuery ? " " : null;
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$this->PrepareRendering();
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$sSelect = self::ClauseSelect($this->__aFields);
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$sFrom = self::ClauseFrom($this->__aFrom, $sIndent);
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$sWhere = self::ClauseWhere($this->m_oConditionExpr, $aArgs);
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$sGroupBy = self::ClauseGroupBy($this->__aGroupBy);
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$sOrderBy = self::ClauseOrderBy($aOrderBy, $this->__aFields);
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if (!empty($sGroupBy))
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{
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$sGroupBy = "GROUP BY $sGroupBy$sLineSep";
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}
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if (!empty($sOrderBy))
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{
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$sOrderBy = "ORDER BY $sOrderBy$sLineSep";
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}
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if ($iLimitCount > 0)
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{
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$sLimit = 'LIMIT '.$iLimitStart.', '.$iLimitCount;
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}
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else
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{
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$sLimit = '';
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}
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if (count($this->__aSelectedIdFields) > 0)
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{
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$aCountFields = array();
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foreach ($this->__aSelectedIdFields as $sFieldExpr)
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{
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$aCountFields[] = "COALESCE($sFieldExpr, 0)"; // Null values are excluded from the count
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}
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$sCountFields = implode(', ', $aCountFields);
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$sCountClause = "DISTINCT $sCountFields";
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}
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else
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{
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$sCountClause = '*';
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}
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$sSQL = "SELECT $sSelect,$sLineSep COUNT($sCountClause) AS _itop_count_$sLineSep FROM $sFrom$sLineSep WHERE $sWhere$sLineSep $sGroupBy $sOrderBy$sLineSep $sLimit";
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return $sSQL;
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}
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// Purpose: prepare the query data, once for all
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private function PrepareRendering()
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{
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if (is_null($this->__aFrom))
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{
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$this->__aFrom = array();
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$this->__aFields = array();
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$this->__aGroupBy = array();
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$this->__aDelTables = array();
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$this->__aSetValues = array();
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$this->__aSelectedIdFields = array();
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$this->PrepareSingleTable($this, $this->__aFrom, '', array('jointype' => 'first'));
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}
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}
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/**
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* @param \SQLObjectQuery $oRootQuery
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* @param $aFrom
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* @param $sCallerAlias
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* @param $aJoinData
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*
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* @return string
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*
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* @since 2.7.7 3.0.1 3.1.0 N°3129 Remove default value for $sCallerAlias for PHP 8.0 compat (Private method with only 2 calls in the class, both providing the optional parameter)
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*/
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private function PrepareSingleTable(SQLObjectQuery $oRootQuery, &$aFrom, $sCallerAlias, $aJoinData)
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{
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$aTranslationTable[$this->m_sTable]['*'] = $this->m_sTableAlias;
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$sJoinCond = '';
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// Handle the various kinds of join (or first table in the list)
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//
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if (empty($aJoinData['righttablealias']))
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{
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$sRightTableAlias = $this->m_sTableAlias;
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}
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else
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{
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$sRightTableAlias = $aJoinData['righttablealias'];
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}
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switch ($aJoinData['jointype'])
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{
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case "first":
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$aFrom[$this->m_sTableAlias] = array("jointype"=>"first", "tablename"=>$this->m_sTable, "joincondition"=>"");
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break;
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case "inner":
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case "left":
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if (isset($aJoinData["on_expression"]))
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{
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$sJoinCond = $aJoinData["on_expression"]->RenderExpression(true);
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}
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else
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{
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$sJoinCond = "`$sCallerAlias`.`{$aJoinData['leftfield']}` = `$sRightTableAlias`.`{$aJoinData['rightfield']}`";
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}
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$aFrom[$this->m_sTableAlias] = array("jointype"=>$aJoinData['jointype'], "tablename"=>$this->m_sTable, "joincondition"=>"$sJoinCond");
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break;
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case "inner_tree":
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if ($aJoinData['invert_on_clause'])
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{
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$sRootLeft = "`$sCallerAlias`.`{$aJoinData['leftfield']}`";
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$sRootRight = "`$sCallerAlias`.`{$aJoinData['rightfield']}`";
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$sNodeLeft = "`$sRightTableAlias`.`{$aJoinData['rightfield_left']}`";
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$sNodeRight = "`$sRightTableAlias`.`{$aJoinData['rightfield_right']}`";
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}
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else
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{
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$sNodeLeft = "`$sCallerAlias`.`{$aJoinData['leftfield']}`";
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$sNodeRight = "`$sCallerAlias`.`{$aJoinData['rightfield']}`";
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$sRootLeft = "`$sRightTableAlias`.`{$aJoinData['rightfield_left']}`";
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$sRootRight = "`$sRightTableAlias`.`{$aJoinData['rightfield_right']}`";
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}
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switch($aJoinData['tree_operator'])
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{
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case TREE_OPERATOR_BELOW:
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$sJoinCond = "$sNodeLeft >= $sRootLeft AND $sNodeLeft <= $sRootRight";
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break;
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case TREE_OPERATOR_BELOW_STRICT:
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$sJoinCond = "$sNodeLeft > $sRootLeft AND $sNodeLeft < $sRootRight";
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break;
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case TREE_OPERATOR_NOT_BELOW: // Complementary of 'BELOW'
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$sJoinCond = "$sNodeLeft < $sRootLeft OR $sNodeLeft > $sRootRight";
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break;
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case TREE_OPERATOR_NOT_BELOW_STRICT: // Complementary of BELOW_STRICT
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$sJoinCond = "$sNodeLeft <= $sRootLeft OR $sNodeLeft >= $sRootRight";
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break;
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case TREE_OPERATOR_ABOVE:
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$sJoinCond = "$sNodeLeft <= $sRootLeft AND $sNodeRight >= $sRootRight";
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break;
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case TREE_OPERATOR_ABOVE_STRICT:
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$sJoinCond = "$sNodeLeft < $sRootLeft AND $sNodeRight > $sRootRight";
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break;
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case TREE_OPERATOR_NOT_ABOVE: // Complementary of 'ABOVE'
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$sJoinCond = "$sNodeLeft > $sRootLeft OR $sNodeRight < $sRootRight";
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break;
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case TREE_OPERATOR_NOT_ABOVE_STRICT: // Complementary of ABOVE_STRICT
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$sJoinCond = "$sNodeLeft >= $sRootLeft OR $sNodeRight <= $sRootRight";
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break;
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}
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$aFrom[$this->m_sTableAlias] = array("jointype"=>$aJoinData['jointype'], "tablename"=>$this->m_sTable, "joincondition"=>"$sJoinCond");
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break;
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}
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// Given the alias, modify the fields and conditions
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// before adding them into the current lists
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//
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foreach($this->m_aFields as $sAlias => $oExpression)
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{
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$oRootQuery->__aFields["`$sAlias`"] = $oExpression->RenderExpression(true);
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}
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if ($this->m_aGroupBy)
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{
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foreach($this->m_aGroupBy as $sAlias => $oExpression)
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{
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$oRootQuery->__aGroupBy["`$sAlias`"] = $oExpression->RenderExpression(true);
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}
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}
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if ($this->m_bToDelete)
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{
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$oRootQuery->__aDelTables[] = "`{$this->m_sTableAlias}`";
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}
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foreach($this->m_aValues as $sFieldName=>$value)
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{
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$oRootQuery->__aSetValues["`{$this->m_sTableAlias}`.`$sFieldName`"] = $value; // quoted further!
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}
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if (!is_null($this->m_oSelectedIdField))
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{
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$oRootQuery->__aSelectedIdFields[] = $this->m_oSelectedIdField->RenderExpression(true);
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}
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// loop on joins, to complete the list of tables/fields/conditions
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//
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$aTempFrom = array(); // temporary subset of 'from' specs, to be grouped in the final query
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foreach ($this->m_aJoinSelects as $aJoinData)
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{
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/** @var \SQLObjectQuery $oRightSelect */
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$oRightSelect = $aJoinData["select"];
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$oRightSelect->PrepareSingleTable($oRootQuery, $aTempFrom, $this->m_sTableAlias, $aJoinData);
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}
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$aFrom[$this->m_sTableAlias]['subfrom'] = $aTempFrom;
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return $this->m_sTableAlias;
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}
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public function OptimizeJoins($aUsedTables, $bTopCall = true)
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{
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$this->m_iOriginalTableCount = $this->CountTables();
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if ($bTopCall)
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{
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// Top call: complete the list of tables absolutely required to perform the right query
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$this->CollectUsedTables($aUsedTables);
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}
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$aToDiscard = array();
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foreach ($this->m_aJoinSelects as $i => $aJoinInfo)
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{
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$oSQLQuery = $aJoinInfo["select"];
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$sTableAlias = $oSQLQuery->GetTableAlias();
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if ($oSQLQuery->OptimizeJoins($aUsedTables, false) && !array_key_exists($sTableAlias, $aUsedTables))
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{
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$aToDiscard[] = $i;
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}
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}
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foreach ($aToDiscard as $i)
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{
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unset($this->m_aJoinSelects[$i]);
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}
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return (count($this->m_aJoinSelects) == 0);
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}
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public function CountTables()
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{
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$iRet = 1;
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foreach ($this->m_aJoinSelects as $i => $aJoinInfo)
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{
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$oSQLQuery = $aJoinInfo["select"];
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$iRet += $oSQLQuery->CountTables();
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}
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return $iRet;
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}
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public function CollectUsedTables(&$aTables)
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{
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$this->m_oConditionExpr->CollectUsedParents($aTables);
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foreach($this->m_aFields as $sFieldAlias => $oField)
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{
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$oField->CollectUsedParents($aTables);
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}
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if ($this->m_aGroupBy)
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{
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foreach($this->m_aGroupBy as $sAlias => $oExpression)
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{
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$oExpression->CollectUsedParents($aTables);
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}
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}
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if (!is_null($this->m_oSelectedIdField))
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{
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$this->m_oSelectedIdField->CollectUsedParents($aTables);
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}
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foreach ($this->m_aJoinSelects as $i => $aJoinInfo)
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{
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$oSQLQuery = $aJoinInfo["select"];
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if ($oSQLQuery->HasRequiredTables($aTables))
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{
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// There is something required in the branch, then this node is a MUST
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if (isset($aJoinInfo['righttablealias']))
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{
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$aTables[$aJoinInfo['righttablealias']] = true;
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}
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if (isset($aJoinInfo["on_expression"]))
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{
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$aJoinInfo["on_expression"]->CollectUsedParents($aTables);
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}
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}
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}
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return $aTables;
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}
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// Is required in the JOIN, and therefore we must ensure that the join expression will be valid
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protected function HasRequiredTables(&$aTables)
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{
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$bResult = false;
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if (array_key_exists($this->m_sTableAlias, $aTables))
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{
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$bResult = true;
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}
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foreach ($this->m_aJoinSelects as $i => $aJoinInfo)
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{
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$oSQLQuery = $aJoinInfo["select"];
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if ($oSQLQuery->HasRequiredTables($aTables))
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{
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// There is something required in the branch, then this node is a MUST
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if (isset($aJoinInfo['righttablealias']))
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{
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$aTables[$aJoinInfo['righttablealias']] = true;
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}
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if (isset($aJoinInfo["on_expression"]))
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{
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$aJoinInfo["on_expression"]->CollectUsedParents($aTables);
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}
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$bResult = true;
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}
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}
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// None of the tables is in the list of required tables
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return $bResult;
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}
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}
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