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doctrine-dbal
Commit 7359ee0e authored by zYne's avatar zYne
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DQL expression handling rewrite

parent 5fba56bb
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Showing with 178 additions and 96 deletions
lib/Doctrine/Query.php
View file @ 7359ee0e
......@@ -54,18 +54,18 @@ class Doctrine_Query extends Doctrine_Query_Abstract implements Countable
protected $isLimitSubqueryUsed = false;
/**
* @var array $_neededTableAliases an array containing the needed table aliases
* @var array $_neededTables an array containing the needed table aliases
*/
protected $_neededTables = array();
/**
* @var array $pendingFields
*/
protected $pendingFields = array();
/**
* @var array $pendingSubqueries SELECT part subqueries, these are called pending subqueries since
* they cannot be parsed directly (some queries might be correlated)
*/
protected $pendingSubqueries = array();
/**
* @var array $pendingFields
*/
protected $pendingFields = array();
/**
* @var array $_parsers an array of parser objects, each DQL query part has its own parser
*/
......@@ -79,9 +79,9 @@ class Doctrine_Query extends Doctrine_Query_Abstract implements Countable
* @var array $_dqlParts an array containing all DQL query parts
*/
protected $_dqlParts = array(
'from' => array(),
'select' => array(),
'forUpdate' => false,
'from' => array(),
'set' => array(),
'join' => array(),
'where' => array(),
......@@ -378,16 +378,85 @@ class Doctrine_Query extends Doctrine_Query_Abstract implements Countable
$fields = array_unique(array_merge($table->getPrimaryKeys(), $fields));
}
}
}
$sql = array();
foreach ($fields as $name) {
$name = $table->getColumnName($name);
$this->parts['select'][] = $this->_conn->quoteIdentifier($tableAlias . '.' . $name)
$sql[] = $this->_conn->quoteIdentifier($tableAlias . '.' . $name)
. ' AS '
. $this->_conn->quoteIdentifier($tableAlias . '__' . $name);
}
$this->_neededTables[] = $tableAlias;
return implode(', ', $sql);
}
}
/**
* parseSelectField
*
* @throws Doctrine_Query_Exception if unknown component alias has been given
* @return void
*/
public function parseSelectField($field)
{
$terms = explode('.', $field);
if (isset($terms[1])) {
$componentAlias = $terms[0];
$field = $terms[1];
} else {
reset($this->_aliasMap);
$componentAlias = key($this->_aliasMap);
$fields = $terms[0];
}
$tableAlias = $this->getTableAlias($componentAlias);
$table = $this->_aliasMap[$componentAlias]['table'];
// check for wildcards
if ($field === '*') {
$sql = array();
foreach ($table->getColumnNames() as $field) {
$sql[] = $this->parseSelectField($componentAlias . '.' . $field);
}
return implode(', ', $sql);
} else {
}
$name = $table->getColumnName($field);
$this->_neededTables[] = $tableAlias;
return $this->_conn->quoteIdentifier($tableAlias . '.' . $name)
. ' AS '
. $this->_conn->quoteIdentifier($tableAlias . '__' . $name);
}
/**
* getExpressionOwner
* returns the component alias for owner of given expression
*
* @param string $expr expression from which to get to owner from
* @return string the component alias
*/
public function getExpressionOwner($expr)
{
if (strtoupper(substr(trim($expr, '( '), 0, 6)) !== 'SELECT') {
preg_match_all("/[a-z0-9_]+\.[a-z0-9_]+[\.[a-z0-9]+]*/i", $expr, $matches);
$match = current($matches);
if (isset($match[0])) {
$terms = explode('.', $match[0]);
$this->neededTables[] = $tableAlias;
return $terms[0];
}
}
return $this->getRootAlias();
}
/**
......@@ -399,62 +468,71 @@ class Doctrine_Query extends Doctrine_Query_Abstract implements Countable
*/
public function parseSelect($dql)
{
$refs = Doctrine_Tokenizer::bracketExplode($dql, ',');
$refs = Doctrine_Tokenizer::sqlExplode($dql, ',');
$pos = strpos(trim($refs[0]), ' ');
$first = substr($refs[0], 0, $pos);
// check for DISTINCT keyword
if ($first === 'DISTINCT') {
$this->parts['distinct'] = true;
$refs[0] = substr($refs[0], ++$pos);
}
$parsedComponents = array();
foreach ($refs as $reference) {
$reference = trim($reference);
if (strpos($reference, '(') !== false) {
if (substr($reference, 0, 1) === '(') {
// subselect found in SELECT part
$this->parseSubselect($reference);
} else {
$this->parseAggregateFunction($reference);
if (empty($reference)) {
continue;
}
} else {
$terms = Doctrine_Tokenizer::sqlExplode($reference, ' ');
$e = explode('.', $reference);
if (count($e) > 2) {
$this->pendingFields[] = $reference;
} else {
$this->pendingFields[$e[0]][] = $e[1];
}
}
$pos = strpos($terms[0], '(');
if (count($terms) > 1 || $pos !== false) {
$expression = array_shift($terms);
$alias = array_pop($terms);
if ( ! $alias) {
$alias = substr($expression, 0, $pos);
}
$componentAlias = $this->getExpressionOwner($expression);
$expression = $this->parseClause($expression);
$tableAlias = $this->getTableAlias($componentAlias);
$index = count($this->aggregateMap);
$sqlAlias = $this->_conn->quoteIdentifier($tableAlias . '__' . $index);
$this->parts['select'][] = $expression . ' AS ' . $sqlAlias;
$this->aggregateMap[$alias] = $sqlAlias;
$this->_expressionMap[$alias][0] = $expression;
$this->_aliasMap[$componentAlias]['agg'][$index] = $alias;
$this->_neededTables[] = $tableAlias;
} else {
$e = explode('.', $terms[0]);
if (isset($e[1])) {
$componentAlias = $e[0];
$field = $e[1];
} else {
reset($this->_aliasMap);
$componentAlias = key($this->_aliasMap);
$field = $e[0];
}
/**
* parseSubselect
*
* parses the subquery found in DQL SELECT part and adds the
* parsed form into $pendingSubqueries stack
*
* @param string $reference
* @return void
*/
public function parseSubselect($reference)
{
$e = Doctrine_Tokenizer::bracketExplode($reference, ' ');
$alias = $e[1];
if (count($e) > 2) {
if (strtoupper($e[1]) !== 'AS') {
throw new Doctrine_Query_Exception('Syntax error near: ' . $reference);
$this->pendingFields[$componentAlias][] = $field;
}
$alias = $e[2];
}
$subquery = substr($e[0], 1, -1);
$this->pendingSubqueries[] = array($subquery, $alias);
}
/**
* parseClause
......@@ -494,7 +572,7 @@ class Doctrine_Query extends Doctrine_Query_Abstract implements Countable
try {
$expr = call_user_func_array(array($this->_conn->expression, $name), $args);
} catch(Doctrine_Expression_Exception $e) {
throw new Doctrine_Query_Exception('Unknown function ' . $func . '.');
throw new Doctrine_Query_Exception('Unknown function ' . $expr . '.');
}
$term[0] = $expr;
} else {
......@@ -706,7 +784,7 @@ class Doctrine_Query extends Doctrine_Query_Abstract implements Countable
$this->_aliasMap[$componentAlias]['agg'][$index] = $alias;
$this->neededTables[] = $tableAlias;
$this->_neededTables[] = $tableAlias;
}
// reset the state
$this->pendingAggregates = array();
......@@ -755,7 +833,7 @@ class Doctrine_Query extends Doctrine_Query_Abstract implements Countable
$e = explode(' ', $part);
$aliases = array_merge($this->subqueryAliases,
array_keys($this->neededTables));
array_keys($this->_neededTables));
if ( ! in_array($e[3], $aliases) &&
! in_array($e[2], $aliases) &&
......@@ -810,6 +888,37 @@ class Doctrine_Query extends Doctrine_Query_Abstract implements Countable
public function postQuery()
{
}
/**
* processQueryPart
* parses given query part
*
* @param string $queryPartName the name of the query part
* @param array $queryParts an array containing the query part data
* @return Doctrine_Query this object
*/
public function processQueryPart($queryPartName, $queryParts)
{
$this->removeQueryPart($queryPartName);
if (is_array($queryParts) && ! empty($queryParts)) {
foreach ($queryParts as $queryPart) {
$parser = $this->getParser($queryPartName);
$sql = $parser->parse($queryPart);
if (isset($sql)) {
if ($queryPartName == 'limit' ||
$queryPartName == 'offset') {
$this->setQueryPart($queryPartName, $sql);
} else {
$this->addQueryPart($queryPartName, $sql);
}
}
}
}
}
/**
* builds the sql query from the given parameters and applies things such as
......@@ -837,28 +946,7 @@ class Doctrine_Query extends Doctrine_Query_Abstract implements Countable
// parse the DQL parts
foreach ($this->_dqlParts as $queryPartName => $queryParts) {
$this->removeQueryPart($queryPartName);
if (is_array($queryParts) && ! empty($queryParts)) {
foreach ($queryParts as $queryPart) {
$parser = $this->getParser($queryPartName);
$sql = $parser->parse($queryPart);
if (isset($sql)) {
if ($queryPartName == 'limit' ||
$queryPartName == 'offset') {
$this->setQueryPart($queryPartName, $sql);
} else {
$this->addQueryPart($queryPartName, $sql);
}
}
}
}
$this->processQueryPart($queryPartName, $queryParts);
}
$params = $this->convertEnums($params);
......@@ -885,12 +973,20 @@ class Doctrine_Query extends Doctrine_Query_Abstract implements Countable
$needsSubQuery = true;
}
// process all pending SELECT part subqueries
$this->processPendingSubqueries();
$this->processPendingAggregates();
$sql = array();
foreach ($this->_aliasMap as $alias => $map) {
$fieldSql = $this->processPendingFields($alias);
if ( ! empty($fieldSql)) {
$sql[] = $fieldSql;
}
}
if ( ! empty($sql)) {
array_unshift($this->parts['select'], implode(', ', $sql));
}
// build the basic query
$this->pendingFields = array();
// build the basic query
$q = $this->getQueryBase();
$q .= $this->buildFromPart();
......@@ -1395,22 +1491,8 @@ class Doctrine_Query extends Doctrine_Query_Abstract implements Countable
$restoreState = false;
// load fields if necessary
if ($loadFields && empty($this->pendingFields)
&& empty($this->pendingAggregates)
&& empty($this->pendingSubqueries)) {
if ($loadFields && empty($this->_dqlParts['select'])) {
$this->pendingFields[$componentAlias] = array('*');
$restoreState = true;
}
if (isset($this->pendingFields[$componentAlias])) {
$this->processPendingFields($componentAlias);
}
if ($restoreState) {
$this->pendingFields = array();
$this->pendingAggregates = array();
}
}
$parent = $prevPath;
......
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