272 lines
9.2 KiB
PHP
272 lines
9.2 KiB
PHP
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<?php
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/*
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* $Id: From.php 1080 2007-02-10 18:17:08Z romanb $
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* This software consists of voluntary contributions made by many individuals
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* and is licensed under the LGPL. For more information, see
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* <http://www.phpdoctrine.com>.
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*/
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Doctrine::autoload("Doctrine_Query_Part");
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/**
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* Doctrine_Query_Select
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*
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* @package Doctrine
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* @license http://www.opensource.org/licenses/lgpl-license.php LGPL
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* @category Object Relational Mapping
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* @link www.phpdoctrine.com
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* @since 1.0
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* @version $Revision: 1080 $
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* @author Konsta Vesterinen <kvesteri@cc.hut.fi>
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*/
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class Doctrine_Query_Select extends Doctrine_Query_Part
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{
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/**
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* processPendingFields
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* the fields in SELECT clause cannot be parsed until the components
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* in FROM clause are parsed, hence this method is called everytime a
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* specific component is being parsed.
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*
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* @throws Doctrine_Query_Exception if unknown component alias has been given
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* @param string $componentAlias the alias of the component
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* @return void
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*/
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public function processPendingFields($componentAlias)
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{
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$tableAlias = $this->getTableAlias($componentAlias);
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$table = $this->_aliasMap[$componentAlias]['table'];
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if (isset($this->pendingFields[$componentAlias])) {
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$fields = $this->pendingFields[$componentAlias];
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// check for wildcards
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if (in_array('*', $fields)) {
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$fields = $table->getColumnNames();
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} else {
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// only auto-add the primary key fields if this query object is not
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// a subquery of another query object
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if ( ! $this->isSubquery) {
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$fields = array_unique(array_merge($table->getPrimaryKeys(), $fields));
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}
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}
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}
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foreach ($fields as $name) {
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$name = $table->getColumnName($name);
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$this->parts['select'][] = $tableAlias . '.' .$name . ' AS ' . $tableAlias . '__' . $name;
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}
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$this->neededTables[] = $tableAlias;
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}
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/**
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* parseSelect
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* parses the query select part and
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* adds selected fields to pendingFields array
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*
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* @param string $dql
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*/
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public function parseSelect($dql)
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{
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$refs = Doctrine_Query::bracketExplode($dql, ',');
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foreach ($refs as $reference) {
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if (strpos($reference, '(') !== false) {
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if (substr($reference, 0, 1) === '(') {
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// subselect found in SELECT part
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$this->parseSubselect($reference);
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} else {
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$this->parseAggregateFunction2($reference);
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}
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} else {
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$e = explode('.', $reference);
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if (count($e) > 2) {
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$this->pendingFields[] = $reference;
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} else {
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$this->pendingFields[$e[0]][] = $e[1];
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}
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}
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}
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}
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/**
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* parseSubselect
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*
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* parses the subquery found in DQL SELECT part and adds the
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* parsed form into $pendingSubqueries stack
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*
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* @param string $reference
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* @return void
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*/
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public function parseSubselect($reference)
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{
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$e = Doctrine_Query::bracketExplode($reference, ' ');
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$alias = $e[1];
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if (count($e) > 2) {
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if (strtoupper($e[1]) !== 'AS') {
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throw new Doctrine_Query_Exception('Syntax error near: ' . $reference);
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}
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$alias = $e[2];
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}
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$subquery = substr($e[0], 1, -1);
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$this->pendingSubqueries[] = array($subquery, $alias);
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}
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public function parseAggregateFunction2($func)
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{
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$e = Doctrine_Query::bracketExplode($func, ' ');
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$func = $e[0];
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$pos = strpos($func, '(');
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$name = substr($func, 0, $pos);
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try {
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$argStr = substr($func, ($pos + 1), -1);
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$args = explode(',', $argStr);
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$func = call_user_func_array(array($this->conn->expression, $name), $args);
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if(substr($func, 0, 1) !== '(') {
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$pos = strpos($func, '(');
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$name = substr($func, 0, $pos);
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} else {
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$name = $func;
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}
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$e2 = explode(' ', $args[0]);
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$distinct = '';
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if(count($e2) > 1) {
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if(strtoupper($e2[0]) == 'DISTINCT')
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$distinct = 'DISTINCT ';
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$args[0] = $e2[1];
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}
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$parts = explode('.', $args[0]);
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$owner = $parts[0];
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$alias = (isset($e[1])) ? $e[1] : $name;
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$e3 = explode('.', $alias);
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if(count($e3) > 1) {
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$alias = $e3[1];
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$owner = $e3[0];
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}
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// a function without parameters eg. RANDOM()
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if ($owner === '') {
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$owner = 0;
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}
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$this->pendingAggregates[$owner][] = array($name, $args, $distinct, $alias);
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} catch(Doctrine_Expression_Exception $e) {
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throw new Doctrine_Query_Exception('Unknown function ' . $func . '.');
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}
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}
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public function processPendingSubqueries()
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{
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if ($this->subqueriesProcessed === true) {
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return false;
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}
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foreach ($this->pendingSubqueries as $value) {
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list($dql, $alias) = $value;
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$sql = $this->createSubquery()->parseQuery($dql, false)->getQuery();
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reset($this->tableAliases);
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$tableAlias = current($this->tableAliases);
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reset($this->compAliases);
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$componentAlias = key($this->compAliases);
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$sqlAlias = $tableAlias . '__' . count($this->aggregateMap);
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$this->parts['select'][] = '(' . $sql . ') AS ' . $sqlAlias;
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$this->aggregateMap[$alias] = $sqlAlias;
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$this->subqueryAggregates[$componentAlias][] = $alias;
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}
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$this->subqueriesProcessed = true;
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return true;
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}
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public function processPendingAggregates($componentAlias)
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{
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$tableAlias = $this->getTableAlias($componentAlias);
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if ( ! isset($this->tables[$tableAlias])) {
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throw new Doctrine_Query_Exception('Unknown component path ' . $componentAlias);
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}
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$root = current($this->tables);
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$table = $this->tables[$tableAlias];
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$aggregates = array();
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if(isset($this->pendingAggregates[$componentAlias])) {
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$aggregates = $this->pendingAggregates[$componentAlias];
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}
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if ($root === $table) {
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if (isset($this->pendingAggregates[0])) {
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$aggregates += $this->pendingAggregates[0];
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}
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}
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foreach($aggregates as $parts) {
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list($name, $args, $distinct, $alias) = $parts;
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$arglist = array();
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foreach($args as $arg) {
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$e = explode('.', $arg);
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if (is_numeric($arg)) {
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$arglist[] = $arg;
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} elseif (count($e) > 1) {
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//$tableAlias = $this->getTableAlias($e[0]);
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$table = $this->tables[$tableAlias];
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$e[1] = $table->getColumnName($e[1]);
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if( ! $table->hasColumn($e[1])) {
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throw new Doctrine_Query_Exception('Unknown column ' . $e[1]);
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}
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$arglist[] = $tableAlias . '.' . $e[1];
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} else {
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$arglist[] = $e[0];
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}
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}
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$sqlAlias = $tableAlias . '__' . count($this->aggregateMap);
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if(substr($name, 0, 1) !== '(') {
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$this->parts['select'][] = $name . '(' . $distinct . implode(', ', $arglist) . ') AS ' . $sqlAlias;
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} else {
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$this->parts['select'][] = $name . ' AS ' . $sqlAlias;
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}
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$this->aggregateMap[$alias] = $sqlAlias;
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$this->neededTables[] = $tableAlias;
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}
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}
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}
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