<?php
/*
* $Id$
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* This software consists of voluntary contributions made by many individuals
* and is licensed under the LGPL. For more information, see
* <http://www.doctrine-project.org>.
*/
namespace Doctrine\ORM\Query;
use Doctrine\ORM\Query,
Doctrine\ORM\Query\QueryException;
/**
* The SqlWalker is a TreeWalker that walks over a DQL AST and constructs
* the corresponding SQL.
*
* @author Roman Borschel <roman@code-factory.org>
* @author Benjamin Eberlei <kontakt@beberlei.de>
* @since 2.0
* @todo Rename: SQLWalker
*/
class SqlWalker implements TreeWalker
{
/**
* @var ResultSetMapping
*/
private $_rsm;
/** Counters for generating unique column aliases, table aliases and parameter indexes. */
private $_aliasCounter = 0;
private $_tableAliasCounter = 0;
private $_scalarResultCounter = 1;
private $_sqlParamIndex = 1;
/**
* @var ParserResult
*/
private $_parserResult;
/**
* @var EntityManager
*/
private $_em;
/**
* @var Doctrine\DBAL\Connection
*/
private $_conn;
/**
* @var AbstractQuery
*/
private $_query;
private $_tableAliasMap = array();
/** Map from result variable names to their SQL column alias names. */
private $_scalarResultAliasMap = array();
/** Map of all components/classes that appear in the DQL query. */
private $_queryComponents;
/** A list of classes that appear in non-scalar SelectExpressions. */
private $_selectedClasses = array();
/**
* The DQL alias of the root class of the currently traversed query.
* TODO: May need to be turned into a stack for usage in subqueries
*/
private $_currentRootAlias;
/**
* Flag that indicates whether to generate SQL table aliases in the SQL.
* These should only be generated for SELECT queries, not for UPDATE/DELETE.
*/
private $_useSqlTableAliases = true;
/**
* The database platform abstraction.
*
* @var AbstractPlatform
*/
private $_platform;
/**
* {@inheritDoc}
*/
public function __construct($query, $parserResult, array $queryComponents)
{
$this->_query = $query;
$this->_parserResult = $parserResult;
$this->_queryComponents = $queryComponents;
$this->_rsm = $parserResult->getResultSetMapping();
$this->_em = $query->getEntityManager();
$this->_conn = $this->_em->getConnection();
$this->_platform = $this->_conn->getDatabasePlatform();
}
/**
* Gets the Query instance used by the walker.
*
* @return Query.
*/
public function getQuery()
{
return $this->_query;
}
/**
* Gets the Connection used by the walker.
*
* @return Connection
*/
public function getConnection()
{
return $this->_conn;
}
/**
* Gets the EntityManager used by the walker.
*
* @return EntityManager
*/
public function getEntityManager()
{
return $this->_em;
}
/**
* Gets the information about a single query component.
*
* @param string $dqlAlias The DQL alias.
* @return array
*/
public function getQueryComponent($dqlAlias)
{
return $this->_queryComponents[$dqlAlias];
}
/**
* Gets an executor that can be used to execute the result of this walker.
*
* @return AbstractExecutor
*/
public function getExecutor($AST)
{
$isDeleteStatement = $AST instanceof AST\DeleteStatement;
$isUpdateStatement = $AST instanceof AST\UpdateStatement;
if ($isDeleteStatement) {
$primaryClass = $this->_em->getClassMetadata(
$AST->deleteClause->abstractSchemaName
);
if ($primaryClass->isInheritanceTypeJoined()) {
return new Exec\MultiTableDeleteExecutor($AST, $this);
} else {
return new Exec\SingleTableDeleteUpdateExecutor($AST, $this);
}
} else if ($isUpdateStatement) {
$primaryClass = $this->_em->getClassMetadata(
$AST->updateClause->abstractSchemaName
);
if ($primaryClass->isInheritanceTypeJoined()) {
return new Exec\MultiTableUpdateExecutor($AST, $this);
} else {
return new Exec\SingleTableDeleteUpdateExecutor($AST, $this);
}
}
return new Exec\SingleSelectExecutor($AST, $this);
}
/**
* Generates a unique, short SQL table alias.
*
* @param string $dqlAlias The DQL alias.
* @return string Generated table alias.
*/
public function getSqlTableAlias($tableName, $dqlAlias = '')
{
$tableName .= $dqlAlias;
if ( ! isset($this->_tableAliasMap[$tableName])) {
$this->_tableAliasMap[$tableName] = strtolower(substr($tableName, 0, 1)) . $this->_tableAliasCounter++ . '_';
}
return $this->_tableAliasMap[$tableName];
}
/**
* Forces the SqlWalker to use a specific alias for a table name, rather than
* generating an alias on its own.
*
* @param string $tableName
* @param string $alias
*/
public function setSqlTableAlias($tableName, $alias)
{
$this->_tableAliasMap[$tableName] = $alias;
return $alias;
}
/**
* Gets an SQL column alias for a column name.
*
* @param string $columnName
* @return string
*/
public function getSqlColumnAlias($columnName)
{
return $columnName . $this->_aliasCounter++;
}
/**
* Generates the SQL JOINs that are necessary for Class Table Inheritance
* for the given class.
*
* @param ClassMetadata $class The class for which to generate the joins.
* @param string $dqlAlias The DQL alias of the class.
* @return string The SQL.
*/
private function _generateClassTableInheritanceJoins($class, $dqlAlias)
{
$sql = '';
$baseTableAlias = $this->getSqlTableAlias($class->primaryTable['name'], $dqlAlias);
// INNER JOIN parent class tables
foreach ($class->parentClasses as $parentClassName) {
$parentClass = $this->_em->getClassMetadata($parentClassName);
$tableAlias = $this->getSqlTableAlias($parentClass->primaryTable['name'], $dqlAlias);
$sql .= ' INNER JOIN ' . $parentClass->getQuotedTableName($this->_platform)
. ' ' . $tableAlias . ' ON ';
$first = true;
foreach ($class->identifier as $idField) {
if ($first) $first = false; else $sql .= ' AND ';
$columnName = $class->getQuotedColumnName($idField, $this->_platform);
$sql .= $baseTableAlias . '.' . $columnName
. ' = '
. $tableAlias . '.' . $columnName;
}
}
// LEFT JOIN subclass tables, if partial objects disallowed
if ( ! $this->_query->getHint(Query::HINT_FORCE_PARTIAL_LOAD)) {
foreach ($class->subClasses as $subClassName) {
$subClass = $this->_em->getClassMetadata($subClassName);
$tableAlias = $this->getSqlTableAlias($subClass->primaryTable['name'], $dqlAlias);
$sql .= ' LEFT JOIN ' . $subClass->getQuotedTableName($this->_platform)
. ' ' . $tableAlias . ' ON ';
$first = true;
foreach ($class->identifier as $idField) {
if ($first) $first = false; else $sql .= ' AND ';
$columnName = $class->getQuotedColumnName($idField, $this->_platform);
$sql .= $baseTableAlias . '.' . $columnName
. ' = '
. $tableAlias . '.' . $columnName;
}
}
}
return $sql;
}
private function _generateOrderedCollectionOrderByItems()
{
$sql = '';
foreach ($this->_selectedClasses AS $dqlAlias => $class) {
$qComp = $this->_queryComponents[$dqlAlias];
if (isset($qComp['relation']) && ($qComp['relation']->isManyToMany() || $qComp['relation']->isOneToMany())
&& $qComp['relation']->orderBy != null) {
foreach ($qComp['relation']->orderBy AS $fieldName => $orientation) {
if ($qComp['metadata']->isInheritanceTypeJoined()) {
$tableName = $this->_em->getUnitOfWork()->getEntityPersister($class->name)->getOwningTable($fieldName);
} else {
$tableName = $qComp['metadata']->primaryTable['name'];
}
if ($sql != '') {
$sql .= ', ';
}
$sql .= $this->getSqlTableAlias($tableName, $dqlAlias) . "." .
$qComp['metadata']->getQuotedColumnName($fieldName, $this->_platform) . " ".$orientation;
}
}
}
return $sql;
}
/**
* Generates a discriminator column SQL condition for the class with the given DQL alias.
*
* @param string $dqlAlias
* @return string
*/
private function _generateDiscriminatorColumnConditionSql($dqlAlias)
{
$sql = '';
if ($dqlAlias) {
$class = $this->_queryComponents[$dqlAlias]['metadata'];
if ($class->isInheritanceTypeSingleTable()) {
$conn = $this->_em->getConnection();
$values = array($conn->quote($class->discriminatorValue));
foreach ($class->subClasses as $subclassName) {
$values[] = $conn->quote($this->_em->getClassMetadata($subclassName)->discriminatorValue);
}
$sql .= (($this->_useSqlTableAliases)
? $this->getSqlTableAlias($class->primaryTable['name'], $dqlAlias) . '.' : ''
) . $class->discriminatorColumn['name']
. ' IN (' . implode(', ', $values) . ')';
}
}
return $sql;
}
/**
* Walks down a SelectStatement AST node, thereby generating the appropriate SQL.
*
* @return string The SQL.
*/
public function walkSelectStatement(AST\SelectStatement $AST)
{
$sql = $this->walkSelectClause($AST->selectClause);
$sql .= $this->walkFromClause($AST->fromClause);
if (($whereClause = $AST->whereClause) !== null) {
$sql .= $this->walkWhereClause($whereClause);
} else if (($discSql = $this->_generateDiscriminatorColumnConditionSql($this->_currentRootAlias)) !== '') {
$sql .= ' WHERE ' . $discSql;
}
$sql .= $AST->groupByClause ? $this->walkGroupByClause($AST->groupByClause) : '';
$sql .= $AST->havingClause ? $this->walkHavingClause($AST->havingClause) : '';
if (($orderByClause = $AST->orderByClause) !== null) {
$sql .= $AST->orderByClause ? $this->walkOrderByClause($AST->orderByClause) : '';
} else if (($orderBySql = $this->_generateOrderedCollectionOrderByItems()) !== '') {
$sql .= ' ORDER BY '.$orderBySql;
}
$sql = $this->_platform->modifyLimitQuery(
$sql, $this->_query->getMaxResults(), $this->_query->getFirstResult()
);
return $sql;
}
/**
* Walks down an UpdateStatement AST node, thereby generating the appropriate SQL.
*
* @param UpdateStatement
* @return string The SQL.
*/
public function walkUpdateStatement(AST\UpdateStatement $AST)
{
$this->_useSqlTableAliases = false;
$sql = $this->walkUpdateClause($AST->updateClause);
if (($whereClause = $AST->whereClause) !== null) {
$sql .= $this->walkWhereClause($whereClause);
} else if (($discSql = $this->_generateDiscriminatorColumnConditionSql($this->_currentRootAlias)) !== '') {
$sql .= ' WHERE ' . $discSql;
}
return $sql;
}
/**
* Walks down a DeleteStatement AST node, thereby generating the appropriate SQL.
*
* @param DeleteStatement
* @return string The SQL.
*/
public function walkDeleteStatement(AST\DeleteStatement $AST)
{
$this->_useSqlTableAliases = false;
$sql = $this->walkDeleteClause($AST->deleteClause);
if (($whereClause = $AST->whereClause) !== null) {
$sql .= $this->walkWhereClause($whereClause);
} else if (($discSql = $this->_generateDiscriminatorColumnConditionSql($this->_currentRootAlias)) !== '') {
$sql .= ' WHERE ' . $discSql;
}
return $sql;
}
/**
* Walks down an IdentificationVariable (no AST node associated), thereby generating the SQL.
*
* @param string $identificationVariable
* @return string The SQL.
*/
public function walkIdentificationVariable($identificationVariable, $fieldName = null)
{
$class = $this->_queryComponents[$identificationVariable]['metadata'];
if (
$fieldName !== null && $class->isInheritanceTypeJoined() &&
isset($class->fieldMappings[$fieldName]['inherited'])
) {
$class = $this->_em->getClassMetadata($class->fieldMappings[$fieldName]['inherited']);
}
return $this->getSqlTableAlias($class->primaryTable['name'], $identificationVariable);
}
/**
* Walks down a PathExpression AST node, thereby generating the appropriate SQL.
*
* @param mixed
* @return string The SQL.
*/
public function walkPathExpression($pathExpr)
{
$sql = '';
switch ($pathExpr->type) {
case AST\PathExpression::TYPE_STATE_FIELD:
$parts = $pathExpr->parts;
$fieldName = array_pop($parts);
$dqlAlias = $pathExpr->identificationVariable . ( ! empty($parts) ? '.' . implode('.', $parts) : '');
$class = $this->_queryComponents[$dqlAlias]['metadata'];
if ($this->_useSqlTableAliases) {
$sql .= $this->walkIdentificationVariable($dqlAlias, $fieldName) . '.';
}
$sql .= $class->getQuotedColumnName($fieldName, $this->_platform);
break;
case AST\PathExpression::TYPE_SINGLE_VALUED_ASSOCIATION:
// 1- the owning side:
// Just use the foreign key, i.e. u.group_id
$parts = $pathExpr->parts;
$fieldName = array_pop($parts);
$dqlAlias = $pathExpr->identificationVariable;
$class = $this->_queryComponents[$dqlAlias]['metadata'];
$assoc = $class->associationMappings[$fieldName];
if ($assoc->isOwningSide) {
// COMPOSITE KEYS NOT (YET?) SUPPORTED
if (count($assoc->sourceToTargetKeyColumns) > 1) {
throw QueryException::associationPathCompositeKeyNotSupported();
}
$sql .= $this->walkIdentificationVariable($dqlAlias) . '.'
. reset($assoc->targetToSourceKeyColumns);
} else {
// 2- Inverse side: NOT (YET?) SUPPORTED
throw QueryException::associationPathInverseSideNotSupported();
}
break;
default:
throw QueryException::invalidPathExpression($pathExpr);
}
return $sql;
}
/**
* Walks down a SelectClause AST node, thereby generating the appropriate SQL.
*
* @param $selectClause
* @return string The SQL.
*/
public function walkSelectClause($selectClause)
{
$sql = 'SELECT ' . (($selectClause->isDistinct) ? 'DISTINCT ' : '') . implode(
', ', array_map(array($this, 'walkSelectExpression'), $selectClause->selectExpressions)
);
$addMetaColumns = ! $this->_query->getHint(Query::HINT_FORCE_PARTIAL_LOAD) &&
$this->_query->getHydrationMode() == Query::HYDRATE_OBJECT
||
$this->_query->getHydrationMode() != Query::HYDRATE_OBJECT &&
$this->_query->getHint(Query::HINT_INCLUDE_META_COLUMNS);
foreach ($this->_selectedClasses as $dqlAlias => $class) {
// Register as entity or joined entity result
if ($this->_queryComponents[$dqlAlias]['relation'] === null) {
$this->_rsm->addEntityResult($class->name, $dqlAlias);
} else {
$this->_rsm->addJoinedEntityResult(
$class->name, $dqlAlias,
$this->_queryComponents[$dqlAlias]['parent'],
$this->_queryComponents[$dqlAlias]['relation']->sourceFieldName
);
}
if ($class->isInheritanceTypeSingleTable() || $class->isInheritanceTypeJoined()) {
// Add discriminator columns to SQL
$rootClass = $this->_em->getClassMetadata($class->rootEntityName);
$tblAlias = $this->getSqlTableAlias($rootClass->primaryTable['name'], $dqlAlias);
$discrColumn = $rootClass->discriminatorColumn;
$columnAlias = $this->getSqlColumnAlias($discrColumn['name']);
$sql .= ", $tblAlias." . $discrColumn['name'] . ' AS ' . $columnAlias;
$columnAlias = $this->_platform->getSQLResultCasing($columnAlias);
$this->_rsm->setDiscriminatorColumn($dqlAlias, $columnAlias);
$this->_rsm->addMetaResult($dqlAlias, $this->_platform->getSQLResultCasing($columnAlias), $discrColumn['fieldName']);
// Add foreign key columns to SQL, if necessary
if ($addMetaColumns) {
//FIXME: Include foreign key columns of child classes also!!??
foreach ($class->associationMappings as $assoc) {
if ($assoc->isOwningSide && $assoc->isOneToOne()) {
if (isset($class->inheritedAssociationFields[$assoc->sourceFieldName])) {
$owningClass = $this->_em->getClassMetadata($class->inheritedAssociationFields[$assoc->sourceFieldName]);
$sqlTableAlias = $this->getSqlTableAlias($owningClass->primaryTable['name'], $dqlAlias);
} else {
$sqlTableAlias = $this->getSqlTableAlias($class->primaryTable['name'], $dqlAlias);
}
foreach ($assoc->targetToSourceKeyColumns as $srcColumn) {
$columnAlias = $this->getSqlColumnAlias($srcColumn);
$sql .= ", $sqlTableAlias." . $srcColumn . ' AS ' . $columnAlias;
$columnAlias = $this->_platform->getSQLResultCasing($columnAlias);
$this->_rsm->addMetaResult($dqlAlias, $this->_platform->getSQLResultCasing($columnAlias), $srcColumn);
}
}
}
}
} else {
// Add foreign key columns to SQL, if necessary
if ($addMetaColumns) {
$sqlTableAlias = $this->getSqlTableAlias($class->primaryTable['name'], $dqlAlias);
foreach ($class->associationMappings as $assoc) {
if ($assoc->isOwningSide && $assoc->isOneToOne()) {
foreach ($assoc->targetToSourceKeyColumns as $srcColumn) {
$columnAlias = $this->getSqlColumnAlias($srcColumn);
$sql .= ', ' . $sqlTableAlias . '.' . $srcColumn . ' AS ' . $columnAlias;
$columnAlias = $this->_platform->getSQLResultCasing($columnAlias);
$this->_rsm->addMetaResult($dqlAlias, $this->_platform->getSQLResultCasing($columnAlias), $srcColumn);
}
}
}
}
}
}
return $sql;
}
/**
* Walks down a FromClause AST node, thereby generating the appropriate SQL.
*
* @return string The SQL.
*/
public function walkFromClause($fromClause)
{
$sql = ' FROM ';
$identificationVarDecls = $fromClause->identificationVariableDeclarations;
$firstIdentificationVarDecl = $identificationVarDecls[0];
$rangeDecl = $firstIdentificationVarDecl->rangeVariableDeclaration;
$dqlAlias = $rangeDecl->aliasIdentificationVariable;
$this->_currentRootAlias = $dqlAlias;
$class = $this->_em->getClassMetadata($rangeDecl->abstractSchemaName);
$sql .= $class->getQuotedTableName($this->_platform) . ' '
. $this->getSqlTableAlias($class->primaryTable['name'], $dqlAlias);
if ($class->isInheritanceTypeJoined()) {
$sql .= $this->_generateClassTableInheritanceJoins($class, $dqlAlias);
}
foreach ($firstIdentificationVarDecl->joinVariableDeclarations as $joinVarDecl) {
$sql .= $this->walkJoinVariableDeclaration($joinVarDecl);
}
return $sql;
}
/**
* Walks down a FunctionNode AST node, thereby generating the appropriate SQL.
*
* @return string The SQL.
*/
public function walkFunction($function)
{
return $function->getSql($this);
}
/**
* Walks down an OrderByClause AST node, thereby generating the appropriate SQL.
*
* @param OrderByClause
* @return string The SQL.
*/
public function walkOrderByClause($orderByClause)
{
$colSql = $this->_generateOrderedCollectionOrderByItems();
if ($colSql != '') {
$colSql = ", ".$colSql;
}
// OrderByClause ::= "ORDER" "BY" OrderByItem {"," OrderByItem}*
return ' ORDER BY ' . implode(
', ', array_map(array($this, 'walkOrderByItem'), $orderByClause->orderByItems)
) . $colSql;
}
/**
* Walks down an OrderByItem AST node, thereby generating the appropriate SQL.
*
* @param OrderByItem
* @return string The SQL.
*/
public function walkOrderByItem($orderByItem)
{
$sql = '';
$expr = $orderByItem->expression;
if ($expr instanceof AST\PathExpression) {
$sql = $this->walkPathExpression($expr);
} else {
$columnName = $this->_queryComponents[$expr]['token']['value'];
$sql = $this->_scalarResultAliasMap[$columnName];
}
return $sql . ' ' . strtoupper($orderByItem->type);;
}
/**
* Walks down a HavingClause AST node, thereby generating the appropriate SQL.
*
* @param HavingClause
* @return string The SQL.
*/
public function walkHavingClause($havingClause)
{
return ' HAVING ' . implode(
' OR ', array_map(array($this, 'walkConditionalTerm'), $havingClause->conditionalExpression->conditionalTerms)
);
}
/**
* Walks down a JoinVariableDeclaration AST node and creates the corresponding SQL.
*
* @param JoinVariableDeclaration $joinVarDecl
* @return string The SQL.
*/
public function walkJoinVariableDeclaration($joinVarDecl)
{
$join = $joinVarDecl->join;
$joinType = $join->joinType;
if ($joinType == AST\Join::JOIN_TYPE_LEFT || $joinType == AST\Join::JOIN_TYPE_LEFTOUTER) {
$sql = ' LEFT JOIN ';
} else {
$sql = ' INNER JOIN ';
}
$joinAssocPathExpr = $join->joinAssociationPathExpression;
$joinedDqlAlias = $join->aliasIdentificationVariable;
$targetQComp = $this->_queryComponents[$joinedDqlAlias];
$targetClass = $targetQComp['metadata'];
$relation = $targetQComp['relation'];
$sourceClass = $this->_queryComponents[$joinAssocPathExpr->identificationVariable]['metadata'];
$targetTableName = $targetClass->getQuotedTableName($this->_platform);
$targetTableAlias = $this->getSqlTableAlias($targetClass->getTableName(), $joinedDqlAlias);
$sourceTableAlias = $this->getSqlTableAlias(
$sourceClass->getTableName(), $joinAssocPathExpr->identificationVariable
);
// Ensure we got the owning side, since it has all mapping info
if ( ! $relation->isOwningSide) {
$assoc = $targetClass->associationMappings[$relation->mappedByFieldName];
} else {
$assoc = $relation;
}
if ($this->_query->getHint(Query::HINT_INTERNAL_ITERATION) == true) {
if ($relation->isOneToMany() || $relation->isManyToMany()) {
throw QueryException::iterateWithFetchJoinNotAllowed($assoc);
}
}
if ($assoc->isOneToOne()) {
$sql .= $targetTableName . ' ' . $targetTableAlias . ' ON ';
$first = true;
foreach ($assoc->sourceToTargetKeyColumns as $sourceColumn => $targetColumn) {
if ( ! $first) $sql .= ' AND '; else $first = false;
if ($relation->isOwningSide) {
$quotedTargetColumn = $targetClass->getQuotedColumnName($targetClass->fieldNames[$targetColumn], $this->_platform);
$sql .= $sourceTableAlias . '.' . $sourceColumn
. ' = '
. $targetTableAlias . '.' . $quotedTargetColumn;
} else {
$quotedTargetColumn = $sourceClass->getQuotedColumnName($sourceClass->fieldNames[$targetColumn], $this->_platform);
$sql .= $sourceTableAlias . '.' . $quotedTargetColumn
. ' = '
. $targetTableAlias . '.' . $sourceColumn;
}
}
} else if ($assoc->isManyToMany()) {
// Join relation table
$joinTable = $assoc->getJoinTable();
$joinTableAlias = $this->getSqlTableAlias($joinTable['name'], $joinedDqlAlias);
$sql .= $assoc->getQuotedJoinTableName($this->_platform) . ' ' . $joinTableAlias . ' ON ';
if ($relation->isOwningSide) {
foreach ($assoc->relationToSourceKeyColumns as $relationColumn => $sourceColumn) {
$sql .= $sourceTableAlias . '.' . $sourceClass->getQuotedColumnName($sourceClass->fieldNames[$sourceColumn], $this->_platform)
. ' = '
. $joinTableAlias . '.' . $relationColumn;
}
} else {
foreach ($assoc->relationToTargetKeyColumns as $relationColumn => $targetColumn) {
$sql .= $sourceTableAlias . '.' . $targetClass->getQuotedColumnName($targetClass->fieldNames[$targetColumn], $this->_platform)
. ' = '
. $joinTableAlias . '.' . $relationColumn;
}
}
// Join target table
$sql .= ($joinType == AST\Join::JOIN_TYPE_LEFT || $joinType == AST\Join::JOIN_TYPE_LEFTOUTER)
? ' LEFT JOIN ' : ' INNER JOIN ';
$sql .= $targetTableName . ' ' . $targetTableAlias . ' ON ';
if ($relation->isOwningSide) {
foreach ($assoc->relationToTargetKeyColumns as $relationColumn => $targetColumn) {
$sql .= $targetTableAlias . '.' . $targetClass->getQuotedColumnName($targetClass->fieldNames[$targetColumn], $this->_platform)
. ' = '
. $joinTableAlias . '.' . $relationColumn;
}
} else {
foreach ($assoc->relationToSourceKeyColumns as $relationColumn => $sourceColumn) {
$sql .= $targetTableAlias . '.' . $sourceClass->getQuotedColumnName($sourceClass->fieldNames[$sourceColumn], $this->_platform)
. ' = '
. $joinTableAlias . '.' . $relationColumn;
}
}
}
// Handle WITH clause
if ($join->conditionalExpression !== null) {
$sql .= ' AND (' . implode(' OR ',
array_map(array($this, 'walkConditionalTerm'), $join->conditionalExpression->conditionalTerms)
). ')';
}
$discrSql = $this->_generateDiscriminatorColumnConditionSql($joinedDqlAlias);
if ($discrSql) {
$sql .= ' AND ' . $discrSql;
}
if ($targetClass->isInheritanceTypeJoined()) {
$sql .= $this->_generateClassTableInheritanceJoins($targetClass, $joinedDqlAlias);
}
return $sql;
}
/**
* Walks down a SelectExpression AST node and generates the corresponding SQL.
*
* @param SelectExpression $selectExpression
* @return string The SQL.
*/
public function walkSelectExpression($selectExpression)
{
$sql = '';
$expr = $selectExpression->expression;
if ($expr instanceof AST\PathExpression) {
if ($expr->type == AST\PathExpression::TYPE_STATE_FIELD) {
$parts = $expr->parts;
$fieldName = array_pop($parts);
$dqlAlias = $expr->identificationVariable . (( ! empty($parts)) ? '.' . implode('.', $parts) : '');
$qComp = $this->_queryComponents[$dqlAlias];
$class = $qComp['metadata'];
if ( ! $selectExpression->fieldIdentificationVariable) {
$resultAlias = $fieldName;
} else {
$resultAlias = $selectExpression->fieldIdentificationVariable;
}
if ($class->isInheritanceTypeJoined()) {
$tableName = $this->_em->getUnitOfWork()->getEntityPersister($class->name)->getOwningTable($fieldName);
} else {
$tableName = $class->getTableName();
}
$sqlTableAlias = $this->getSqlTableAlias($tableName, $dqlAlias);
$columnName = $class->getQuotedColumnName($fieldName, $this->_platform);
$columnAlias = $this->getSqlColumnAlias($columnName);
$sql .= $sqlTableAlias . '.' . $columnName . ' AS ' . $columnAlias;
$columnAlias = $this->_platform->getSQLResultCasing($columnAlias);
$this->_rsm->addScalarResult($columnAlias, $resultAlias);
} else {
throw QueryException::invalidPathExpression($expr->type);
}
}
else if ($expr instanceof AST\AggregateExpression) {
if ( ! $selectExpression->fieldIdentificationVariable) {
$resultAlias = $this->_scalarResultCounter++;
} else {
$resultAlias = $selectExpression->fieldIdentificationVariable;
}
$columnAlias = 'sclr' . $this->_aliasCounter++;
$sql .= $this->walkAggregateExpression($expr) . ' AS ' . $columnAlias;
$this->_scalarResultAliasMap[$resultAlias] = $columnAlias;
$columnAlias = $this->_platform->getSQLResultCasing($columnAlias);
$this->_rsm->addScalarResult($columnAlias, $resultAlias);
}
else if ($expr instanceof AST\Subselect) {
if ( ! $selectExpression->fieldIdentificationVariable) {
$resultAlias = $this->_scalarResultCounter++;
} else {
$resultAlias = $selectExpression->fieldIdentificationVariable;
}
$columnAlias = 'sclr' . $this->_aliasCounter++;
$sql .= '(' . $this->walkSubselect($expr) . ') AS '.$columnAlias;
$this->_scalarResultAliasMap[$resultAlias] = $columnAlias;
$columnAlias = $this->_platform->getSQLResultCasing($columnAlias);
$this->_rsm->addScalarResult($columnAlias, $resultAlias);
}
else if ($expr instanceof AST\Functions\FunctionNode) {
if ( ! $selectExpression->fieldIdentificationVariable) {
$resultAlias = $this->_scalarResultCounter++;
} else {
$resultAlias = $selectExpression->fieldIdentificationVariable;
}
$columnAlias = 'sclr' . $this->_aliasCounter++;
$sql .= $this->walkFunction($expr) . ' AS ' . $columnAlias;
$this->_scalarResultAliasMap[$resultAlias] = $columnAlias;
$columnAlias = $this->_platform->getSQLResultCasing($columnAlias);
$this->_rsm->addScalarResult($columnAlias, $resultAlias);
}
else if ($expr instanceof AST\SimpleArithmeticExpression) {
if ( ! $selectExpression->fieldIdentificationVariable) {
$resultAlias = $this->_scalarResultCounter++;
} else {
$resultAlias = $selectExpression->fieldIdentificationVariable;
}
$columnAlias = 'sclr' . $this->_aliasCounter++;
$sql .= $this->walkSimpleArithmeticExpression($expr) . ' AS ' . $columnAlias;
$this->_scalarResultAliasMap[$resultAlias] = $columnAlias;
$columnAlias = $this->_platform->getSQLResultCasing($columnAlias);
$this->_rsm->addScalarResult($columnAlias, $resultAlias);
} else {
// IdentificationVariable or PartialObjectExpression
if ($expr instanceof AST\PartialObjectExpression) {
$dqlAlias = $expr->identificationVariable;
$partialFieldSet = $expr->partialFieldSet;
} else {
$dqlAlias = $expr;
$partialFieldSet = array();
}
$queryComp = $this->_queryComponents[$dqlAlias];
$class = $queryComp['metadata'];
if ( ! isset($this->_selectedClasses[$dqlAlias])) {
$this->_selectedClasses[$dqlAlias] = $class;
}
$beginning = true;
// Select all fields from the queried class
foreach ($class->fieldMappings as $fieldName => $mapping) {
if ($partialFieldSet && !in_array($fieldName, $partialFieldSet)) {
continue;
}
if (isset($mapping['inherited'])) {
$tableName = $this->_em->getClassMetadata($mapping['inherited'])->primaryTable['name'];
} else {
$tableName = $class->primaryTable['name'];
}
if ($beginning) $beginning = false; else $sql .= ', ';
$sqlTableAlias = $this->getSqlTableAlias($tableName, $dqlAlias);
$columnAlias = $this->getSqlColumnAlias($mapping['columnName']);
$sql .= $sqlTableAlias . '.' . $class->getQuotedColumnName($fieldName, $this->_platform)
. ' AS ' . $columnAlias;
$columnAlias = $this->_platform->getSQLResultCasing($columnAlias);
$this->_rsm->addFieldResult($dqlAlias, $columnAlias, $fieldName, $class->name);
}
// Add any additional fields of subclasses (excluding inherited fields)
// 1) on Single Table Inheritance: always, since its marginal overhead
// 2) on Class Table Inheritance only if partial objects are disallowed,
// since it requires outer joining subtables.
if ($class->isInheritanceTypeSingleTable() || ! $this->_query->getHint(Query::HINT_FORCE_PARTIAL_LOAD)) {
foreach ($class->subClasses as $subClassName) {
$subClass = $this->_em->getClassMetadata($subClassName);
$sqlTableAlias = $this->getSqlTableAlias($subClass->primaryTable['name'], $dqlAlias);
foreach ($subClass->fieldMappings as $fieldName => $mapping) {
if (isset($mapping['inherited']) || $partialFieldSet && !in_array($fieldName, $partialFieldSet)) {
continue;
}
if ($beginning) $beginning = false; else $sql .= ', ';
$columnAlias = $this->getSqlColumnAlias($mapping['columnName']);
$sql .= $sqlTableAlias . '.' . $subClass->getQuotedColumnName($fieldName, $this->_platform)
. ' AS ' . $columnAlias;
$columnAlias = $this->_platform->getSQLResultCasing($columnAlias);
$this->_rsm->addFieldResult($dqlAlias, $columnAlias, $fieldName, $subClassName);
}
// Add join columns (foreign keys) of the subclass
//TODO: Probably better do this in walkSelectClause to honor the INCLUDE_META_COLUMNS hint
foreach ($subClass->associationMappings as $fieldName => $assoc) {
if ($assoc->isOwningSide && $assoc->isOneToOne() && ! isset($subClass->inheritedAssociationFields[$fieldName])) {
foreach ($assoc->targetToSourceKeyColumns as $srcColumn) {
if ($beginning) $beginning = false; else $sql .= ', ';
$columnAlias = $this->getSqlColumnAlias($srcColumn);
$sql .= $sqlTableAlias . '.' . $srcColumn . ' AS ' . $columnAlias;
$this->_rsm->addMetaResult($dqlAlias, $this->_platform->getSQLResultCasing($columnAlias), $srcColumn);
}
}
}
}
}
}
return $sql;
}
/**
* Walks down a QuantifiedExpression AST node, thereby generating the appropriate SQL.
*
* @param QuantifiedExpression
* @return string The SQL.
*/
public function walkQuantifiedExpression($qExpr)
{
return ' ' . strtoupper($qExpr->type)
. '(' . $this->walkSubselect($qExpr->subselect) . ')';
}
/**
* Walks down a Subselect AST node, thereby generating the appropriate SQL.
*
* @param Subselect
* @return string The SQL.
*/
public function walkSubselect($subselect)
{
$useAliasesBefore = $this->_useSqlTableAliases;
$this->_useSqlTableAliases = true;
$sql = $this->walkSimpleSelectClause($subselect->simpleSelectClause);
$sql .= $this->walkSubselectFromClause($subselect->subselectFromClause);
$sql .= $subselect->whereClause ? $this->walkWhereClause($subselect->whereClause) : '';
$sql .= $subselect->groupByClause ? $this->walkGroupByClause($subselect->groupByClause) : '';
$sql .= $subselect->havingClause ? $this->walkHavingClause($subselect->havingClause) : '';
$sql .= $subselect->orderByClause ? $this->walkOrderByClause($subselect->orderByClause) : '';
$this->_useSqlTableAliases = $useAliasesBefore;
return $sql;
}
/**
* Walks down a SubselectFromClause AST node, thereby generating the appropriate SQL.
*
* @param SubselectFromClause
* @return string The SQL.
*/
public function walkSubselectFromClause($subselectFromClause)
{
$identificationVarDecls = $subselectFromClause->identificationVariableDeclarations;
$firstIdentificationVarDecl = $identificationVarDecls[0];
$rangeDecl = $firstIdentificationVarDecl->rangeVariableDeclaration;
$class = $this->_em->getClassMetadata($rangeDecl->abstractSchemaName);
$dqlAlias = $rangeDecl->aliasIdentificationVariable;
$sql = ' FROM ' . $class->getQuotedTableName($this->_platform) . ' '
. $this->getSqlTableAlias($class->primaryTable['name'], $dqlAlias);
foreach ($firstIdentificationVarDecl->joinVariableDeclarations as $joinVarDecl) {
$sql .= $this->walkJoinVariableDeclaration($joinVarDecl);
}
return $sql;
}
/**
* Walks down a SimpleSelectClause AST node, thereby generating the appropriate SQL.
*
* @param SimpleSelectClause
* @return string The SQL.
*/
public function walkSimpleSelectClause($simpleSelectClause)
{
return 'SELECT' . ($simpleSelectClause->isDistinct ? ' DISTINCT' : '')
. $this->walkSimpleSelectExpression($simpleSelectClause->simpleSelectExpression);
}
/**
* Walks down a SimpleSelectExpression AST node, thereby generating the appropriate SQL.
*
* @param SimpleSelectExpression
* @return string The SQL.
*/
public function walkSimpleSelectExpression($simpleSelectExpression)
{
$sql = '';
$expr = $simpleSelectExpression->expression;
if ($expr instanceof AST\PathExpression) {
$sql .= ' ' . $this->walkPathExpression($expr);
} else if ($expr instanceof AST\AggregateExpression) {
if ( ! $simpleSelectExpression->fieldIdentificationVariable) {
$alias = $this->_scalarResultCounter++;
} else {
$alias = $simpleSelectExpression->fieldIdentificationVariable;
}
$sql .= ' ' . $this->walkAggregateExpression($expr) . ' AS dctrn__' . $alias;
} else {
// IdentificationVariable
// FIXME: Composite key support, or select all columns? Does that make sense
// in a subquery?
$class = $this->_queryComponents[$expr]['metadata'];
$sql .= ' ' . $this->getSqlTableAlias($class->getTableName(), $expr) . '.'
. $class->getQuotedColumnName($class->identifier[0], $this->_platform);
}
return $sql;
}
/**
* Walks down an AggregateExpression AST node, thereby generating the appropriate SQL.
*
* @param AggregateExpression
* @return string The SQL.
*/
public function walkAggregateExpression($aggExpression)
{
return $aggExpression->functionName . '(' . ($aggExpression->isDistinct ? 'DISTINCT ' : '')
. $this->walkPathExpression($aggExpression->pathExpression) . ')';
}
/**
* Walks down a GroupByClause AST node, thereby generating the appropriate SQL.
*
* @param GroupByClause
* @return string The SQL.
*/
public function walkGroupByClause($groupByClause)
{
return ' GROUP BY ' . implode(
', ', array_map(array($this, 'walkGroupByItem'), $groupByClause->groupByItems)
);
}
/**
* Walks down a GroupByItem AST node, thereby generating the appropriate SQL.
*
* @param GroupByItem
* @return string The SQL.
*/
public function walkGroupByItem(AST\PathExpression $pathExpr)
{
return $this->walkPathExpression($pathExpr);
}
/**
* Walks down a DeleteClause AST node, thereby generating the appropriate SQL.
*
* @param DeleteClause
* @return string The SQL.
*/
public function walkDeleteClause(AST\DeleteClause $deleteClause)
{
$sql = 'DELETE FROM ';
$class = $this->_em->getClassMetadata($deleteClause->abstractSchemaName);
$sql .= $class->getQuotedTableName($this->_platform);
if ($this->_useSqlTableAliases) {
$sql .= ' ' . $this->getSqlTableAlias($class->getTableName());
}
$this->_currentRootAlias = $deleteClause->aliasIdentificationVariable;
return $sql;
}
/**
* Walks down an UpdateClause AST node, thereby generating the appropriate SQL.
*
* @param UpdateClause
* @return string The SQL.
*/
public function walkUpdateClause($updateClause)
{
$sql = 'UPDATE ';
$class = $this->_em->getClassMetadata($updateClause->abstractSchemaName);
$sql .= $class->getQuotedTableName($this->_platform);
if ($this->_useSqlTableAliases) {
$sql .= ' ' . $this->getSqlTableAlias($class->getTableName());
}
$this->_currentRootAlias = $updateClause->aliasIdentificationVariable;
$sql .= ' SET ' . implode(
', ', array_map(array($this, 'walkUpdateItem'), $updateClause->updateItems)
);
return $sql;
}
/**
* Walks down an UpdateItem AST node, thereby generating the appropriate SQL.
*
* @param UpdateItem
* @return string The SQL.
*/
public function walkUpdateItem($updateItem)
{
$useTableAliasesBefore = $this->_useSqlTableAliases;
$this->_useSqlTableAliases = false;
$sql = '';
$dqlAlias = $updateItem->identificationVariable;
$qComp = $this->_queryComponents[$dqlAlias];
if ($this->_useSqlTableAliases) {
$sql .= $this->getSqlTableAlias($qComp['metadata']->getTableName()) . '.';
}
$sql .= $qComp['metadata']->getQuotedColumnName($updateItem->field, $this->_platform) . ' = ';
$newValue = $updateItem->newValue;
if ($newValue instanceof AST\Node) {
$sql .= $newValue->dispatch($this);
} else if (is_string($newValue)) {
if (strcasecmp($newValue, 'NULL') === 0) {
$sql .= 'NULL';
} else {
$sql .= $this->_conn->quote($newValue);
}
}
$this->_useSqlTableAliases = $useTableAliasesBefore;
return $sql;
}
/**
* Walks down a WhereClause AST node, thereby generating the appropriate SQL.
*
* @param WhereClause
* @return string The SQL.
*/
public function walkWhereClause($whereClause)
{
$sql = ' WHERE ';
$condExpr = $whereClause->conditionalExpression;
$sql .= implode(
' OR ', array_map(array($this, 'walkConditionalTerm'), $condExpr->conditionalTerms)
);
$discrSql = $this->_generateDiscriminatorColumnConditionSql($this->_currentRootAlias);
if ($discrSql) {
$sql .= ' AND ' . $discrSql;
}
return $sql;
}
/**
* Walks down a ConditionalTerm AST node, thereby generating the appropriate SQL.
*
* @param ConditionalTerm
* @return string The SQL.
*/
public function walkConditionalTerm($condTerm)
{
return implode(
' AND ', array_map(array($this, 'walkConditionalFactor'), $condTerm->conditionalFactors)
);
}
/**
* Walks down a ConditionalFactor AST node, thereby generating the appropriate SQL.
*
* @param ConditionalFactor
* @return string The SQL.
*/
public function walkConditionalFactor($factor)
{
$sql = ($factor->not) ? 'NOT ' : '';
$primary = $factor->conditionalPrimary;
if ($primary->isSimpleConditionalExpression()) {
$sql .= $primary->simpleConditionalExpression->dispatch($this);
} else if ($primary->isConditionalExpression()) {
$condExpr = $primary->conditionalExpression;
$sql .= '(' . implode(
' OR ', array_map(array($this, 'walkConditionalTerm'), $condExpr->conditionalTerms)
) . ')';
}
return $sql;
}
/**
* Walks down an ExistsExpression AST node, thereby generating the appropriate SQL.
*
* @param ExistsExpression
* @return string The SQL.
*/
public function walkExistsExpression($existsExpr)
{
$sql = ($existsExpr->not) ? 'NOT ' : '';
$sql .= 'EXISTS (' . $this->walkSubselect($existsExpr->subselect) . ')';
return $sql;
}
/**
* Walks down a CollectionMemberExpression AST node, thereby generating the appropriate SQL.
*
* @param CollectionMemberExpression
* @return string The SQL.
*/
public function walkCollectionMemberExpression($collMemberExpr)
{
$sql = $collMemberExpr->not ? 'NOT ' : '';
$sql .= 'EXISTS (SELECT 1 FROM ';
$entityExpr = $collMemberExpr->entityExpression;
$collPathExpr = $collMemberExpr->collectionValuedPathExpression;
$parts = $collPathExpr->parts;
$fieldName = array_pop($parts);
$dqlAlias = $collPathExpr->identificationVariable . (( ! empty($parts)) ? '.' . implode('.', $parts) : '');
$class = $this->_queryComponents[$dqlAlias]['metadata'];
if ($entityExpr instanceof AST\InputParameter) {
$dqlParamKey = $entityExpr->name;
$entity = $this->_query->getParameter($dqlParamKey);
} else {
//TODO
throw new \BadMethodCallException("Not implemented");
}
$assoc = $class->associationMappings[$fieldName];
if ($assoc->isOneToMany()) {
$targetClass = $this->_em->getClassMetadata($assoc->targetEntityName);
$targetTableAlias = $this->getSqlTableAlias($targetClass->primaryTable['name']);
$sourceTableAlias = $this->getSqlTableAlias($class->primaryTable['name'], $dqlAlias);
$sql .= $targetClass->getQuotedTableName($this->_platform)
. ' ' . $targetTableAlias . ' WHERE ';
$owningAssoc = $targetClass->associationMappings[$assoc->mappedByFieldName];
$first = true;
foreach ($owningAssoc->targetToSourceKeyColumns as $targetColumn => $sourceColumn) {
if ($first) $first = false; else $sql .= ' AND ';
$sql .= $sourceTableAlias . '.' . $class->getQuotedColumnName($class->fieldNames[$targetColumn], $this->_platform)
. ' = '
. $targetTableAlias . '.' . $sourceColumn;
}
$sql .= ' AND ';
$first = true;
foreach ($targetClass->identifier as $idField) {
if ($first) $first = false; else $sql .= ' AND ';
$this->_parserResult->addParameterMapping($dqlParamKey, $this->_sqlParamIndex++);
$sql .= $targetTableAlias . '.'
. $targetClass->getQuotedColumnName($idField, $this->_platform) . ' = ?';
}
} else { // many-to-many
$targetClass = $this->_em->getClassMetadata($assoc->targetEntityName);
$owningAssoc = $assoc->isOwningSide ? $assoc : $targetClass->associationMappings[$assoc->mappedByFieldName];
$joinTable = $assoc->isOwningSide ? $assoc->joinTable : $owningAssoc->joinTable;
// SQL table aliases
$joinTableAlias = $this->getSqlTableAlias($joinTable['name']);
$targetTableAlias = $this->getSqlTableAlias($targetClass->primaryTable['name']);
$sourceTableAlias = $this->getSqlTableAlias($class->primaryTable['name'], $dqlAlias);
// join to target table
$sql .= $assoc->getQuotedJoinTableName($this->_platform)
. ' ' . $joinTableAlias . ' INNER JOIN '
. $targetClass->getQuotedTableName($this->_platform)
. ' ' . $targetTableAlias . ' ON ';
// join conditions
$joinColumns = $assoc->isOwningSide
? $joinTable['joinColumns']
: $joinTable['inverseJoinColumns'];
$referencedColumnClass = $assoc->isOwningSide ? $class : $targetClass;
$first = true;
foreach ($joinColumns as $joinColumn) {
if ($first) $first = false; else $sql .= ' AND ';
$sql .= $joinTableAlias . '.' . $joinColumn['name'] . ' = '
. $sourceTableAlias . '.' . $referencedColumnClass->getQuotedColumnName(
$referencedColumnClass->fieldNames[$joinColumn['referencedColumnName']],
$this->_platform);
}
$sql .= ' WHERE ';
$joinColumns = $assoc->isOwningSide
? $joinTable['inverseJoinColumns']
: $joinTable['joinColumns'];
$first = true;
foreach ($joinColumns as $joinColumn) {
if ($first) $first = false; else $sql .= ' AND ';
$sql .= $joinTableAlias . '.' . $joinColumn['name'] . ' = '
. $targetTableAlias . '.' . $referencedColumnClass->getQuotedColumnName(
$referencedColumnClass->fieldNames[$joinColumn['referencedColumnName']],
$this->_platform);
}
$sql .= ' AND ';
$first = true;
foreach ($targetClass->identifier as $idField) {
if ($first) $first = false; else $sql .= ' AND ';
$this->_parserResult->addParameterMapping($dqlParamKey, $this->_sqlParamIndex++);
$sql .= $targetTableAlias . '.'
. $targetClass->getQuotedColumnName($idField, $this->_platform) . ' = ?';
}
}
return $sql . ')';
}
/**
* Walks down an EmptyCollectionComparisonExpression AST node, thereby generating the appropriate SQL.
*
* @param EmptyCollectionComparisonExpression
* @return string The SQL.
*/
public function walkEmptyCollectionComparisonExpression($emptyCollCompExpr)
{
$sizeFunc = new AST\Functions\SizeFunction('size');
$sizeFunc->collectionPathExpression = $emptyCollCompExpr->expression;
return $sizeFunc->getSql($this) . ($emptyCollCompExpr->not ? ' > 0' : ' = 0');
}
/**
* Walks down a NullComparisonExpression AST node, thereby generating the appropriate SQL.
*
* @param NullComparisonExpression
* @return string The SQL.
*/
public function walkNullComparisonExpression($nullCompExpr)
{
$sql = '';
$innerExpr = $nullCompExpr->expression;
if ($innerExpr instanceof AST\InputParameter) {
$dqlParamKey = $innerExpr->name;
$this->_parserResult->addParameterMapping($dqlParamKey, $this->_sqlParamIndex++);
$sql .= ' ?';
} else {
$sql .= $this->walkPathExpression($innerExpr);
}
$sql .= ' IS' . ($nullCompExpr->not ? ' NOT' : '') . ' NULL';
return $sql;
}
/**
* Walks down an InExpression AST node, thereby generating the appropriate SQL.
*
* @param InExpression
* @return string The SQL.
*/
public function walkInExpression($inExpr)
{
$sql = $this->walkPathExpression($inExpr->pathExpression)
. ($inExpr->not ? ' NOT' : '') . ' IN (';
if ($inExpr->subselect) {
$sql .= $this->walkSubselect($inExpr->subselect);
} else {
$sql .= implode(', ', array_map(array($this, 'walkInParameter'), $inExpr->literals));
}
$sql .= ')';
return $sql;
}
public function walkInParameter($inParam)
{
return $inParam instanceof AST\InputParameter ?
$this->walkInputParameter($inParam) :
$this->walkLiteral($inParam);
}
/**
* Walks down a literal that represents an AST node, thereby generating the appropriate SQL.
*
* @param mixed
* @return string The SQL.
*/
public function walkLiteral($literal)
{
switch ($literal->type) {
case AST\Literal::STRING:
return $this->_conn->quote($literal->value);
case AST\Literal::BOOLEAN:
$bool = strtolower($literal->value) == 'true' ? true : false;
$boolVal = $this->_conn->getDatabasePlatform()->convertBooleans($bool);
return is_string($boolVal) ? $this->_conn->quote($boolVal) : $boolVal;
case AST\Literal::NUMERIC:
return $literal->value;
default:
throw QueryException::invalidLiteral($literal);
}
}
/**
* Walks down a BetweenExpression AST node, thereby generating the appropriate SQL.
*
* @param BetweenExpression
* @return string The SQL.
*/
public function walkBetweenExpression($betweenExpr)
{
$sql = $this->walkArithmeticExpression($betweenExpr->expression);
if ($betweenExpr->not) $sql .= ' NOT';
$sql .= ' BETWEEN ' . $this->walkArithmeticExpression($betweenExpr->leftBetweenExpression)
. ' AND ' . $this->walkArithmeticExpression($betweenExpr->rightBetweenExpression);
return $sql;
}
/**
* Walks down a LikeExpression AST node, thereby generating the appropriate SQL.
*
* @param LikeExpression
* @return string The SQL.
*/
public function walkLikeExpression($likeExpr)
{
$stringExpr = $likeExpr->stringExpression;
$sql = $stringExpr->dispatch($this) . ($likeExpr->not ? ' NOT' : '') . ' LIKE ';
if ($likeExpr->stringPattern instanceof AST\InputParameter) {
$inputParam = $likeExpr->stringPattern;
$dqlParamKey = $inputParam->name;
$this->_parserResult->addParameterMapping($dqlParamKey, $this->_sqlParamIndex++);
$sql .= '?';
} else {
$sql .= $this->_conn->quote($likeExpr->stringPattern);
}
if ($likeExpr->escapeChar) {
$sql .= ' ESCAPE ' . $this->_conn->quote($likeExpr->escapeChar);
}
return $sql;
}
/**
* Walks down a StateFieldPathExpression AST node, thereby generating the appropriate SQL.
*
* @param StateFieldPathExpression
* @return string The SQL.
*/
public function walkStateFieldPathExpression($stateFieldPathExpression)
{
return $this->walkPathExpression($stateFieldPathExpression);
}
/**
* Walks down a ComparisonExpression AST node, thereby generating the appropriate SQL.
*
* @param ComparisonExpression
* @return string The SQL.
*/
public function walkComparisonExpression($compExpr)
{
$sql = '';
$leftExpr = $compExpr->leftExpression;
$rightExpr = $compExpr->rightExpression;
if ($leftExpr instanceof AST\Node) {
$sql .= $leftExpr->dispatch($this);
} else {
$sql .= is_numeric($leftExpr) ? $leftExpr : $this->_conn->quote($leftExpr);
}
$sql .= ' ' . $compExpr->operator . ' ';
if ($rightExpr instanceof AST\Node) {
$sql .= $rightExpr->dispatch($this);
} else {
$sql .= is_numeric($rightExpr) ? $rightExpr : $this->_conn->quote($rightExpr);
}
return $sql;
}
/**
* Walks down an InputParameter AST node, thereby generating the appropriate SQL.
*
* @param InputParameter
* @return string The SQL.
*/
public function walkInputParameter($inputParam)
{
$this->_parserResult->addParameterMapping($inputParam->name, $this->_sqlParamIndex++);
return '?';
}
/**
* Walks down an ArithmeticExpression AST node, thereby generating the appropriate SQL.
*
* @param ArithmeticExpression
* @return string The SQL.
*/
public function walkArithmeticExpression($arithmeticExpr)
{
return ($arithmeticExpr->isSimpleArithmeticExpression())
? $this->walkSimpleArithmeticExpression($arithmeticExpr->simpleArithmeticExpression)
: $this->walkSubselect($arithmeticExpr->subselect);
}
/**
* Walks down an ArithmeticTerm AST node, thereby generating the appropriate SQL.
*
* @param mixed
* @return string The SQL.
*/
public function walkArithmeticTerm($term)
{
if (is_string($term)) return $term;
return implode(
' ', array_map(array($this, 'walkArithmeticFactor'), $term->arithmeticFactors)
);
}
/**
* Walks down a StringPrimary that represents an AST node, thereby generating the appropriate SQL.
*
* @param mixed
* @return string The SQL.
*/
public function walkStringPrimary($stringPrimary)
{
return (is_string($stringPrimary))
? $this->_conn->quote($stringPrimary)
: $stringPrimary->dispatch($this);
}
/**
* Walks down an ArithmeticFactor that represents an AST node, thereby generating the appropriate SQL.
*
* @param mixed
* @return string The SQL.
*/
public function walkArithmeticFactor($factor)
{
if (is_string($factor)) return $factor;
$sql = ($factor->isNegativeSigned() ? '-' : ($factor->isPositiveSigned() ? '+' : ''));
$primary = $factor->arithmeticPrimary;
if ($primary instanceof AST\SimpleArithmeticExpression) {
$sql .= '(' . $this->walkSimpleArithmeticExpression($primary) . ')';
} else if ($primary instanceof AST\Node) {
$sql .= $primary->dispatch($this);
}
return $sql;
}
/**
* Walks down an SimpleArithmeticExpression AST node, thereby generating the appropriate SQL.
*
* @param SimpleArithmeticExpression
* @return string The SQL.
*/
public function walkSimpleArithmeticExpression($simpleArithmeticExpr)
{
return implode(
' ', array_map(array($this, 'walkArithmeticTerm'), $simpleArithmeticExpr->arithmeticTerms)
);
}
}