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Commit a430d22c authored by zYne's avatar zYne
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draft/new-core/Query.php
View file @ a430d22c
......@@ -69,9 +69,15 @@ class Doctrine_Query2 extends Doctrine_Hydrate2 implements Countable
* @var boolean $subqueriesProcessed Whether or not pending subqueries have already been processed.
* Consequent calls to getQuery would result badly constructed queries
* without this variable
*
* Since subqueries can be correlated, they can only be processed when
* the main query is fully constructed
*/
private $subqueriesProcessed = false;
/**
* @var array $_parsers an array of parser objects
*/
protected $_parsers = array();
/**
......@@ -129,6 +135,818 @@ class Doctrine_Query2 extends Doctrine_Hydrate2 implements Countable
return $this->isDistinct;
}
/**
* getParser
* parser lazy-loader
*
* @throws Doctrine_Query_Exception if unknown parser name given
* @return Doctrine_Query_Part
*/
public function getParser($name)
{
if ( ! isset($this->_parsers[$name])) {
$class = 'Doctrine_Query_' . ucwords(strtolower($name));
Doctrine::autoload($class);
if ( ! class_exists($class)) {
throw new Doctrine_Query_Exception('Unknown parser ' . $name);
}
$this->_parsers[$name] = new $class($this);
}
return $this->_parsers[$name];
}
/**
* processPendingFields
* the fields in SELECT clause cannot be parsed until the components
* in FROM clause are parsed, hence this method is called everytime a
* specific component is being parsed.
*
* @throws Doctrine_Query_Exception if unknown component alias has been given
* @param string $componentAlias the alias of the component
* @return void
*/
public function processPendingFields($componentAlias)
{
$tableAlias = $this->getTableAlias($componentAlias);
$table = $this->_aliasMap[$componentAlias]['table'];
if (isset($this->pendingFields[$componentAlias])) {
$fields = $this->pendingFields[$componentAlias];
// check for wildcards
if (in_array('*', $fields)) {
$fields = $table->getColumnNames();
} else {
// only auto-add the primary key fields if this query object is not
// a subquery of another query object
if ( ! $this->isSubquery) {
$fields = array_unique(array_merge($table->getPrimaryKeys(), $fields));
}
}
}
foreach ($fields as $name) {
$name = $table->getColumnName($name);
$this->parts['select'][] = $tableAlias . '.' .$name . ' AS ' . $tableAlias . '__' . $name;
}
$this->neededTables[] = $tableAlias;
}
/**
* parseSelect
* parses the query select part and
* adds selected fields to pendingFields array
*
* @param string $dql
*/
public function parseSelect($dql)
{
$refs = Doctrine_Query::bracketExplode($dql, ',');
foreach ($refs as $reference) {
if (strpos($reference, '(') !== false) {
if (substr($reference, 0, 1) === '(') {
// subselect found in SELECT part
$this->parseSubselect($reference);
} else {
$this->parseAggregateFunction2($reference);
}
} else {
$e = explode('.', $reference);
if (count($e) > 2) {
$this->pendingFields[] = $reference;
} else {
$this->pendingFields[$e[0]][] = $e[1];
}
}
}
}
/**
* 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)
{
$e = Doctrine_Query::bracketExplode($reference, ' ');
$alias = $e[1];
if (count($e) > 2) {
if (strtoupper($e[1]) !== 'AS') {
throw new Doctrine_Query_Exception('Syntax error near: ' . $reference);
}
$alias = $e[2];
}
$subquery = substr($e[0], 1, -1);
$this->pendingSubqueries[] = array($subquery, $alias);
}
public function parseAggregateFunction2($func)
{
$e = Doctrine_Query::bracketExplode($func, ' ');
$func = $e[0];
$pos = strpos($func, '(');
$name = substr($func, 0, $pos);
try {
$argStr = substr($func, ($pos + 1), -1);
$args = explode(',', $argStr);
$func = call_user_func_array(array($this->conn->expression, $name), $args);
if(substr($func, 0, 1) !== '(') {
$pos = strpos($func, '(');
$name = substr($func, 0, $pos);
} else {
$name = $func;
}
$e2 = explode(' ', $args[0]);
$distinct = '';
if (count($e2) > 1) {
if (strtoupper($e2[0]) == 'DISTINCT') {
$distinct = 'DISTINCT ';
}
$args[0] = $e2[1];
}
$parts = explode('.', $args[0]);
$owner = $parts[0];
$alias = (isset($e[1])) ? $e[1] : $name;
$e3 = explode('.', $alias);
if (count($e3) > 1) {
$alias = $e3[1];
$owner = $e3[0];
}
// a function without parameters eg. RANDOM()
if ($owner === '') {
$owner = 0;
}
$this->pendingAggregates[$owner][] = array($name, $args, $distinct, $alias);
} catch(Doctrine_Expression_Exception $e) {
throw new Doctrine_Query_Exception('Unknown function ' . $func . '.');
}
}
public function processPendingSubqueries()
{
if ($this->subqueriesProcessed === true) {
return false;
}
foreach ($this->pendingSubqueries as $value) {
list($dql, $alias) = $value;
$sql = $this->createSubquery()->parseQuery($dql, false)->getQuery();
reset($this->tableAliases);
$tableAlias = current($this->tableAliases);
reset($this->compAliases);
$componentAlias = key($this->compAliases);
$sqlAlias = $tableAlias . '__' . count($this->aggregateMap);
$this->parts['select'][] = '(' . $sql . ') AS ' . $sqlAlias;
$this->aggregateMap[$alias] = $sqlAlias;
$this->subqueryAggregates[$componentAlias][] = $alias;
}
$this->subqueriesProcessed = true;
return true;
}
public function processPendingAggregates($componentAlias)
{
$tableAlias = $this->getTableAlias($componentAlias);
if ( ! isset($this->tables[$tableAlias])) {
throw new Doctrine_Query_Exception('Unknown component path ' . $componentAlias);
}
$root = current($this->tables);
$table = $this->tables[$tableAlias];
$aggregates = array();
if(isset($this->pendingAggregates[$componentAlias])) {
$aggregates = $this->pendingAggregates[$componentAlias];
}
if ($root === $table) {
if (isset($this->pendingAggregates[0])) {
$aggregates += $this->pendingAggregates[0];
}
}
foreach($aggregates as $parts) {
list($name, $args, $distinct, $alias) = $parts;
$arglist = array();
foreach($args as $arg) {
$e = explode('.', $arg);
if (is_numeric($arg)) {
$arglist[] = $arg;
} elseif (count($e) > 1) {
//$tableAlias = $this->getTableAlias($e[0]);
$table = $this->tables[$tableAlias];
$e[1] = $table->getColumnName($e[1]);
if( ! $table->hasColumn($e[1])) {
throw new Doctrine_Query_Exception('Unknown column ' . $e[1]);
}
$arglist[] = $tableAlias . '.' . $e[1];
} else {
$arglist[] = $e[0];
}
}
$sqlAlias = $tableAlias . '__' . count($this->aggregateMap);
if(substr($name, 0, 1) !== '(') {
$this->parts['select'][] = $name . '(' . $distinct . implode(', ', $arglist) . ') AS ' . $sqlAlias;
} else {
$this->parts['select'][] = $name . ' AS ' . $sqlAlias;
}
$this->aggregateMap[$alias] = $sqlAlias;
$this->neededTables[] = $tableAlias;
}
}
/**
* getQueryBase
* returns the base of the generated sql query
* On mysql driver special strategy has to be used for DELETE statements
*
* @return string the base of the generated sql query
*/
public function getQueryBase()
{
switch ($this->type) {
case self::DELETE:
$q = 'DELETE FROM ';
break;
case self::UPDATE:
$q = 'UPDATE ';
break;
case self::SELECT:
$distinct = ($this->isDistinct()) ? 'DISTINCT ' : '';
$q = 'SELECT ' . $distinct . implode(', ', $this->parts['select']) . ' FROM ';
break;
}
return $q;
}
/**
* buildFromPart
*
* @return string
*/
public function buildFromPart()
{
$q = '';
foreach ($this->parts['from'] as $k => $part) {
if ($k === 0) {
$q .= $part;
continue;
}
// preserve LEFT JOINs only if needed
if (substr($part, 0, 9) === 'LEFT JOIN') {
$e = explode(' ', $part);
$aliases = array_merge($this->subqueryAliases,
array_keys($this->neededTables));
if( ! in_array($e[3], $aliases) &&
! in_array($e[2], $aliases) &&
! empty($this->pendingFields)) {
continue;
}
}
$e = explode(' ON ', $part);
// we can always be sure that the first join condition exists
$e2 = explode(' AND ', $e[1]);
$part = $e[0] . ' ON ' . array_shift($e2);
if ( ! empty($e2)) {
$parser = new Doctrine_Query_JoinCondition($this);
$part .= ' AND ' . $parser->parse(implode(' AND ', $e2));
}
$q .= ' ' . $part;
}
return $q;
}
/**
* builds the sql query from the given parameters and applies things such as
* column aggregation inheritance and limit subqueries if needed
*
* @param array $params an array of prepared statement params (needed only in mysql driver
* when limit subquery algorithm is used)
* @return string the built sql query
*/
public function getQuery($params = array())
{
if (empty($this->parts['select']) || empty($this->parts['from'])) {
return false;
}
$needsSubQuery = false;
$subquery = '';
$k = array_keys($this->_aliasMap);
$table = $this->_aliasMap[$k[0]]['table'];
if( ! empty($this->parts['limit']) && $this->needsSubquery && $table->getAttribute(Doctrine::ATTR_QUERY_LIMIT) == Doctrine::LIMIT_RECORDS) {
$needsSubQuery = true;
$this->limitSubqueryUsed = true;
}
// process all pending SELECT part subqueries
$this->processPendingSubqueries();
// build the basic query
$str = '';
if($this->isDistinct()) {
$str = 'DISTINCT ';
}
$q = $this->getQueryBase();
$q .= $this->buildFromPart();
if ( ! empty($this->parts['set'])) {
$q .= ' SET ' . implode(', ', $this->parts['set']);
}
$string = $this->applyInheritance();
if ( ! empty($string)) {
$this->parts['where'][] = '(' . $string . ')';
}
$modifyLimit = true;
if ( ! empty($this->parts["limit"]) || ! empty($this->parts["offset"])) {
if($needsSubQuery) {
$subquery = $this->getLimitSubquery();
switch(strtolower($this->conn->getName())) {
case 'mysql':
// mysql doesn't support LIMIT in subqueries
$list = $this->conn->execute($subquery, $params)->fetchAll(PDO::FETCH_COLUMN);
$subquery = implode(', ', $list);
break;
case 'pgsql':
// pgsql needs special nested LIMIT subquery
$subquery = 'SELECT doctrine_subquery_alias.' . $table->getIdentifier(). ' FROM (' . $subquery . ') AS doctrine_subquery_alias';
break;
}
$field = $this->aliasHandler->getShortAlias($table->getTableName()) . '.' . $table->getIdentifier();
// only append the subquery if it actually contains something
if($subquery !== '') {
array_unshift($this->parts['where'], $field. ' IN (' . $subquery . ')');
}
$modifyLimit = false;
}
}
$q .= ( ! empty($this->parts['where']))? ' WHERE ' . implode(' AND ', $this->parts['where']):'';
$q .= ( ! empty($this->parts['groupby']))? ' GROUP BY ' . implode(', ', $this->parts['groupby']):'';
$q .= ( ! empty($this->parts['having']))? ' HAVING ' . implode(' AND ', $this->parts['having']):'';
$q .= ( ! empty($this->parts['orderby']))? ' ORDER BY ' . implode(', ', $this->parts['orderby']):'';
if ($modifyLimit) {
$q = $this->conn->modifyLimitQuery($q, $this->parts['limit'], $this->parts['offset']);
}
// return to the previous state
if ( ! empty($string)) {
array_pop($this->parts['where']);
}
if ($needsSubQuery) {
array_shift($this->parts['where']);
}
return $q;
}
/**
* getLimitSubquery
* this is method is used by the record limit algorithm
*
* when fetching one-to-many, many-to-many associated data with LIMIT clause
* an additional subquery is needed for limiting the number of returned records instead
* of limiting the number of sql result set rows
*
* @return string the limit subquery
*/
public function getLimitSubquery()
{
$k = array_keys($this->tables);
$table = $this->tables[$k[0]];
// get short alias
$alias = $this->aliasHandler->getShortAlias($table->getTableName());
$primaryKey = $alias . '.' . $table->getIdentifier();
// initialize the base of the subquery
$subquery = 'SELECT DISTINCT ' . $primaryKey;
if ($this->conn->getDBH()->getAttribute(PDO::ATTR_DRIVER_NAME) == 'pgsql') {
// pgsql needs the order by fields to be preserved in select clause
foreach ($this->parts['orderby'] as $part) {
$e = explode(' ', $part);
// don't add primarykey column (its already in the select clause)
if ($e[0] !== $primaryKey) {
$subquery .= ', ' . $e[0];
}
}
}
$subquery .= ' FROM ' . $this->conn->quoteIdentifier($table->getTableName()) . ' ' . $alias;
foreach ($this->parts['join'] as $parts) {
foreach ($parts as $part) {
// preserve LEFT JOINs only if needed
if (substr($part,0,9) === 'LEFT JOIN') {
$e = explode(' ', $part);
if ( ! in_array($e[3], $this->subqueryAliases) &&
! in_array($e[2], $this->subqueryAliases)) {
continue;
}
}
$subquery .= ' ' . $part;
}
}
// all conditions must be preserved in subquery
$subquery .= ( ! empty($this->parts['where']))? ' WHERE ' . implode(' AND ', $this->parts['where']) : '';
$subquery .= ( ! empty($this->parts['groupby']))? ' GROUP BY ' . implode(', ', $this->parts['groupby']) : '';
$subquery .= ( ! empty($this->parts['having']))? ' HAVING ' . implode(' AND ', $this->parts['having']) : '';
$subquery .= ( ! empty($this->parts['orderby']))? ' ORDER BY ' . implode(', ', $this->parts['orderby']) : '';
// add driver specific limit clause
$subquery = $this->conn->modifyLimitQuery($subquery, $this->parts['limit'], $this->parts['offset']);
$parts = Doctrine_Tokenizer::quoteExplode($subquery, ' ', "'", "'");
foreach($parts as $k => $part) {
if(strpos($part, "'") !== false) {
continue;
}
if($this->aliasHandler->hasAliasFor($part)) {
$parts[$k] = $this->aliasHandler->generateNewAlias($part);
}
if(strpos($part, '.') !== false) {
$e = explode('.', $part);
$trimmed = ltrim($e[0], '( ');
$pos = strpos($e[0], $trimmed);
$e[0] = substr($e[0], 0, $pos) . $this->aliasHandler->generateNewAlias($trimmed);
$parts[$k] = implode('.', $e);
}
}
$subquery = implode(' ', $parts);
return $subquery;
}
/**
* tokenizeQuery
* splits the given dql query into an array where keys
* represent different query part names and values are
* arrays splitted using sqlExplode method
*
* example:
*
* parameter:
* $query = "SELECT u.* FROM User u WHERE u.name LIKE ?"
* returns:
* array('select' => array('u.*'),
* 'from' => array('User', 'u'),
* 'where' => array('u.name', 'LIKE', '?'))
*
* @param string $query DQL query
* @throws Doctrine_Query_Exception if some generic parsing error occurs
* @return array an array containing the query string parts
*/
public function tokenizeQuery($query)
{
$e = Doctrine_Tokenizer::sqlExplode($query, ' ');
foreach($e as $k=>$part) {
$part = trim($part);
switch(strtolower($part)) {
case 'delete':
case 'update':
case 'select':
case 'set':
case 'from':
case 'where':
case 'limit':
case 'offset':
case 'having':
$p = $part;
$parts[$part] = array();
break;
case 'order':
case 'group':
$i = ($k + 1);
if(isset($e[$i]) && strtolower($e[$i]) === "by") {
$p = $part;
$parts[$part] = array();
} else
$parts[$p][] = $part;
break;
case "by":
continue;
default:
if( ! isset($p))
throw new Doctrine_Query_Exception("Couldn't parse query.");
$parts[$p][] = $part;
}
}
return $parts;
}
/**
* DQL PARSER
* parses a DQL query
* first splits the query in parts and then uses individual
* parsers for each part
*
* @param string $query DQL query
* @param boolean $clear whether or not to clear the aliases
* @throws Doctrine_Query_Exception if some generic parsing error occurs
* @return Doctrine_Query
*/
public function parseQuery($query, $clear = true)
{
if ($clear) {
$this->clear();
}
$query = trim($query);
$query = str_replace("\n", ' ', $query);
$query = str_replace("\r", ' ', $query);
$parts = $this->tokenizeQuery($query);
foreach($parts as $k => $part) {
$part = implode(' ', $part);
switch(strtolower($k)) {
case 'create':
$this->type = self::CREATE;
break;
case 'insert':
$this->type = self::INSERT;
break;
case 'delete':
$this->type = self::DELETE;
break;
case 'select':
$this->type = self::SELECT;
$this->parseSelect($part);
break;
case 'update':
$this->type = self::UPDATE;
$k = 'FROM';
case 'from':
$class = 'Doctrine_Query_' . ucwords(strtolower($k));
$parser = new $class($this);
$parser->parse($part);
break;
case 'set':
$class = 'Doctrine_Query_' . ucwords(strtolower($k));
$parser = new $class($this);
$this->parts['set'][] = $parser->parse($part);
break;
case 'group':
case 'order':
$k .= 'by';
case 'where':
case 'having':
$class = 'Doctrine_Query_' . ucwords(strtolower($k));
$parser = new $class($this);
$name = strtolower($k);
$this->parts[$name][] = $parser->parse($part);
break;
case 'limit':
$this->parts['limit'] = trim($part);
break;
case 'offset':
$this->parts['offset'] = trim($part);
break;
}
}
return $this;
}
public function load($path, $loadFields = true)
{
// parse custom join conditions
$e = explode(' ON ', $path);
$joinCondition = '';
if (count($e) > 1) {
$joinCondition = ' AND ' . $e[1];
$path = $e[0];
}
$tmp = explode(' ', $path);
$componentAlias = (count($tmp) > 1) ? end($tmp) : false;
$e = preg_split("/[.:]/", $tmp[0], -1);
$fullPath = $tmp[0];
$prevPath = '';
$fullLength = strlen($fullPath);
if (isset($this->_aliasMap[$e[0]])) {
$table = $this->_aliasMap[$e[0]]['table'];
$prevPath = $parent = array_shift($e);
}
foreach ($e as $key => $name) {
// get length of the previous path
$length = strlen($prevPath);
// build the current component path
$prevPath = ($prevPath) ? $prevPath . '.' . $name : $name;
$delimeter = substr($fullPath, $length, 1);
// if an alias is not given use the current path as an alias identifier
if (strlen($prevPath) !== $fullLength || ! $componentAlias) {
$componentAlias = $prevPath;
}
if ( ! isset($table)) {
// process the root of the path
$table = $this->loadRoot($name, $componentAlias);
} else {
$join = ($delimeter == ':') ? 'INNER JOIN ' : 'LEFT JOIN ';
$relation = $table->getRelation($name);
$this->_aliasMap[$componentAlias] = array('table' => $relation->getTable(),
'parent' => $parent,
'relation' => $relation);
if( ! $relation->isOneToOne()) {
$this->needsSubquery = true;
}
$localAlias = $this->getShortAlias($parent, $table->getTableName());
$foreignAlias = $this->getShortAlias($componentAlias, $relation->getTable()->getTableName());
$localSql = $this->conn->quoteIdentifier($table->getTableName()) . ' ' . $localAlias;
$foreignSql = $this->conn->quoteIdentifier($relation->getTable()->getTableName()) . ' ' . $foreignAlias;
$map = $relation->getTable()->inheritanceMap;
if ( ! $loadFields || ! empty($map) || $joinCondition) {
$this->subqueryAliases[] = $foreignAlias;
}
if ($relation instanceof Doctrine_Relation_Association) {
$asf = $relation->getAssociationFactory();
$assocTableName = $asf->getTableName();
if( ! $loadFields || ! empty($map) || $joinCondition) {
$this->subqueryAliases[] = $assocTableName;
}
$assocPath = $prevPath . '.' . $asf->getComponentName();
$assocAlias = $this->getShortAlias($assocPath, $asf->getTableName());
$queryPart = $join . $assocTableName . ' ' . $assocAlias . ' ON ' . $localAlias . '.'
. $table->getIdentifier() . ' = '
. $assocAlias . '.' . $relation->getLocal();
if ($relation instanceof Doctrine_Relation_Association_Self) {
$queryPart .= ' OR ' . $localAlias . '.' . $table->getIdentifier() . ' = '
. $assocAlias . '.' . $relation->getForeign();
}
$this->parts['from'][] = $queryPart;
$queryPart = $join . $foreignSql . ' ON ' . $foreignAlias . '.'
. $relation->getTable()->getIdentifier() . ' = '
. $assocAlias . '.' . $relation->getForeign()
. $joinCondition;
if ($relation instanceof Doctrine_Relation_Association_Self) {
$queryPart .= ' OR ' . $foreignTable . '.' . $table->getIdentifier() . ' = '
. $assocAlias . '.' . $relation->getLocal();
}
} else {
$queryPart = $join . $foreignSql
. ' ON ' . $localAlias . '.'
. $relation->getLocal() . ' = ' . $foreignAlias . '.' . $relation->getForeign()
. $joinCondition;
}
$this->parts['from'][] = $queryPart;
}
if ($loadFields) {
$restoreState = false;
// load fields if necessary
if ($loadFields && empty($this->pendingFields)) {
$this->pendingFields[$componentAlias] = array('*');
$restoreState = true;
}
if(isset($this->pendingFields[$componentAlias])) {
$this->processPendingFields($componentAlias);
}
if ($restoreState) {
$this->pendingFields = array();
}
if(isset($this->pendingAggregates[$componentAlias]) || isset($this->pendingAggregates[0])) {
$this->processPendingAggregates($componentAlias);
}
}
}
}
/**
* loadRoot
*
* @param string $name
* @param string $componentAlias
*/
public function loadRoot($name, $componentAlias)
{
// get the connection for the component
$this->conn = Doctrine_Manager::getInstance()
->getConnectionForComponent($name);
$table = $this->conn->getTable($name);
$tableName = $table->getTableName();
// get the short alias for this table
$tableAlias = $this->aliasHandler->getShortAlias($componentAlias, $tableName);
// quote table name
$queryPart = $this->conn->quoteIdentifier($tableName);
if ($this->type === self::SELECT) {
$queryPart .= ' ' . $tableAlias;
}
$this->parts['from'][] = $queryPart;
$this->tableAliases[$tableAlias] = $componentAlias;
$this->_aliasMap[$componentAlias] = array('table' => $table);
return $table;
}
/**
* count
*
......@@ -283,7 +1101,7 @@ class Doctrine_Query2 extends Doctrine_Hydrate2 implements Countable
*/
public function select($select)
{
return $this->getParser('from')->parse($select);
return $this->getParser('select')->parse($select);
}
/**
* from
......
lib/Doctrine.php
View file @ a430d22c
......@@ -495,9 +495,9 @@ final class Doctrine
case 'array':
$ret[] = 'Array(';
foreach ($var as $k => $v) {
$ret[] = $k . ' : ' . Doctrine::dump($v);
$ret[] = $k . ' : ' . Doctrine::dump($v, false);
}
$ret[] = ')';
$ret[] = ")";
break;
case 'object':
$ret[] = 'Object(' . get_class($var) . ')';
......
lib/Doctrine/Query/From.php
View file @ a430d22c
......@@ -32,7 +32,6 @@ Doctrine::autoload("Doctrine_Query_Part");
*/
class Doctrine_Query_From extends Doctrine_Query_Part
{
/**
* DQL FROM PARSER
* parses the from part of the query string
......@@ -85,169 +84,5 @@ class Doctrine_Query_From extends Doctrine_Query_Part
$operator = ($last == 'INNER') ? ':' : '.';
}
}
public function load($path, $loadFields = true)
{
// parse custom join conditions
$e = explode(' ON ', $path);
$joinCondition = '';
if (count($e) > 1) {
$joinCondition = ' AND ' . $e[1];
$path = $e[0];
}
$tmp = explode(' ', $path);
$componentAlias = (count($tmp) > 1) ? end($tmp) : false;
$e = preg_split("/[.:]/", $tmp[0], -1);
$fullPath = $tmp[0];
$prevPath = '';
$fullLength = strlen($fullPath);
if (isset($this->_aliasMap[$e[0]])) {
$table = $this->_aliasMap[$e[0]]['table'];
$prevPath = $parent = array_shift($e);
}
foreach ($e as $key => $name) {
// get length of the previous path
$length = strlen($prevPath);
// build the current component path
$prevPath = ($prevPath) ? $prevPath . '.' . $name : $name;
$delimeter = substr($fullPath, $length, 1);
// if an alias is not given use the current path as an alias identifier
if (strlen($prevPath) !== $fullLength || ! $componentAlias) {
$componentAlias = $prevPath;
}
if ( ! isset($table)) {
// process the root of the path
$table = $this->loadRoot($name, $componentAlias);
} else {
$join = ($delimeter == ':') ? 'INNER JOIN ' : 'LEFT JOIN ';
$relation = $table->getRelation($name);
$this->_aliasMap[$componentAlias] = array('table' => $relation->getTable(),
'parent' => $parent,
'relation' => $relation);
if( ! $relation->isOneToOne()) {
$this->needsSubquery = true;
}
$localAlias = $this->getShortAlias($parent, $table->getTableName());
$foreignAlias = $this->getShortAlias($componentAlias, $relation->getTable()->getTableName());
$localSql = $this->conn->quoteIdentifier($table->getTableName()) . ' ' . $localAlias;
$foreignSql = $this->conn->quoteIdentifier($relation->getTable()->getTableName()) . ' ' . $foreignAlias;
$map = $relation->getTable()->inheritanceMap;
if ( ! $loadFields || ! empty($map) || $joinCondition) {
$this->subqueryAliases[] = $foreignAlias;
}
if ($relation instanceof Doctrine_Relation_Association) {
$asf = $relation->getAssociationFactory();
$assocTableName = $asf->getTableName();
if( ! $loadFields || ! empty($map) || $joinCondition) {
$this->subqueryAliases[] = $assocTableName;
}
$assocPath = $prevPath . '.' . $asf->getComponentName();
$assocAlias = $this->getShortAlias($assocPath, $asf->getTableName());
$queryPart = $join . $assocTableName . ' ' . $assocAlias . ' ON ' . $localAlias . '.'
. $table->getIdentifier() . ' = '
. $assocAlias . '.' . $relation->getLocal();
if ($relation instanceof Doctrine_Relation_Association_Self) {
$queryPart .= ' OR ' . $localAlias . '.' . $table->getIdentifier() . ' = '
. $assocAlias . '.' . $relation->getForeign();
}
$this->parts['from'][] = $queryPart;
$queryPart = $join . $foreignSql . ' ON ' . $foreignAlias . '.'
. $relation->getTable()->getIdentifier() . ' = '
. $assocAlias . '.' . $relation->getForeign()
. $joinCondition;
if ($relation instanceof Doctrine_Relation_Association_Self) {
$queryPart .= ' OR ' . $foreignTable . '.' . $table->getIdentifier() . ' = '
. $assocAlias . '.' . $relation->getLocal();
}
} else {
$queryPart = $join . $foreignSql
. ' ON ' . $localAlias . '.'
. $relation->getLocal() . ' = ' . $foreignAlias . '.' . $relation->getForeign()
. $joinCondition;
}
$this->parts['from'][] = $queryPart;
}
if ($loadFields) {
$restoreState = false;
// load fields if necessary
if ($loadFields && empty($this->pendingFields)) {
$this->pendingFields[$componentAlias] = array('*');
$restoreState = true;
}
if(isset($this->pendingFields[$componentAlias])) {
$this->processPendingFields($componentAlias);
}
if ($restoreState) {
$this->pendingFields = array();
}
if(isset($this->pendingAggregates[$componentAlias]) || isset($this->pendingAggregates[0])) {
$this->processPendingAggregates($componentAlias);
}
}
}
}
/**
* loadRoot
*
* @param string $name
* @param string $componentAlias
*/
public function loadRoot($name, $componentAlias)
{
// get the connection for the component
$this->conn = Doctrine_Manager::getInstance()
->getConnectionForComponent($name);
$table = $this->conn->getTable($name);
$tableName = $table->getTableName();
// get the short alias for this table
$tableAlias = $this->aliasHandler->getShortAlias($componentAlias, $tableName);
// quote table name
$queryPart = $this->conn->quoteIdentifier($tableName);
if ($this->type === self::SELECT) {
$queryPart .= ' ' . $tableAlias;
}
$this->parts['from'][] = $queryPart;
$this->tableAliases[$tableAlias] = $componentAlias;
$this->_aliasMap[$componentAlias] = array('table' => $table);
return $table;
}
}
lib/Doctrine/Query/Parser.php
View file @ a430d22c
......@@ -32,389 +32,5 @@
*/
class Doctrine_Query_Parser
{
/**
* getQueryBase
* returns the base of the generated sql query
* On mysql driver special strategy has to be used for DELETE statements
*
* @return string the base of the generated sql query
*/
public function getQueryBase()
{
switch ($this->type) {
case self::DELETE:
$q = 'DELETE FROM ';
break;
case self::UPDATE:
$q = 'UPDATE ';
break;
case self::SELECT:
$distinct = ($this->isDistinct()) ? 'DISTINCT ' : '';
$q = 'SELECT ' . $distinct . implode(', ', $this->parts['select']) . ' FROM ';
break;
}
return $q;
}
/**
* buildFromPart
*
* @return string
*/
public function buildFromPart()
{
foreach ($this->parts['from'] as $k => $part) {
if ($k === 0) {
$q .= $part;
continue;
}
// preserve LEFT JOINs only if needed
if (substr($part, 0, 9) === 'LEFT JOIN') {
$e = explode(' ', $part);
$aliases = array_merge($this->subqueryAliases,
array_keys($this->neededTables));
if( ! in_array($e[3], $aliases) &&
! in_array($e[2], $aliases) &&
! empty($this->pendingFields)) {
continue;
}
}
$e = explode(' ON ', $part);
// we can always be sure that the first join condition exists
$e2 = explode(' AND ', $e[1]);
$part = $e[0] . ' ON ' . array_shift($e2);
if ( ! empty($e2)) {
$parser = new Doctrine_Query_JoinCondition($this);
$part .= ' AND ' . $parser->parse(implode(' AND ', $e2));
}
$q .= ' ' . $part;
}
}
/**
* builds the sql query from the given parameters and applies things such as
* column aggregation inheritance and limit subqueries if needed
*
* @param array $params an array of prepared statement params (needed only in mysql driver
* when limit subquery algorithm is used)
* @return string the built sql query
*/
public function getQuery($params = array())
{
if (empty($this->parts['select']) || empty($this->parts['from'])) {
return false;
}
$needsSubQuery = false;
$subquery = '';
$k = array_keys($this->_aliasMap);
$table = $this->_aliasMap[$k[0]]['table'];
if( ! empty($this->parts['limit']) && $this->needsSubquery && $table->getAttribute(Doctrine::ATTR_QUERY_LIMIT) == Doctrine::LIMIT_RECORDS) {
$needsSubQuery = true;
$this->limitSubqueryUsed = true;
}
// process all pending SELECT part subqueries
$this->processPendingSubqueries();
// build the basic query
$str = '';
if($this->isDistinct()) {
$str = 'DISTINCT ';
}
$q = $this->getQueryBase();
$q .= $this->buildFrom();
if ( ! empty($this->parts['set'])) {
$q .= ' SET ' . implode(', ', $this->parts['set']);
}
$string = $this->applyInheritance();
if ( ! empty($string)) {
$this->parts['where'][] = '(' . $string . ')';
}
$modifyLimit = true;
if ( ! empty($this->parts["limit"]) || ! empty($this->parts["offset"])) {
if($needsSubQuery) {
$subquery = $this->getLimitSubquery();
switch(strtolower($this->conn->getName())) {
case 'mysql':
// mysql doesn't support LIMIT in subqueries
$list = $this->conn->execute($subquery, $params)->fetchAll(PDO::FETCH_COLUMN);
$subquery = implode(', ', $list);
break;
case 'pgsql':
// pgsql needs special nested LIMIT subquery
$subquery = 'SELECT doctrine_subquery_alias.' . $table->getIdentifier(). ' FROM (' . $subquery . ') AS doctrine_subquery_alias';
break;
}
$field = $this->aliasHandler->getShortAlias($table->getTableName()) . '.' . $table->getIdentifier();
// only append the subquery if it actually contains something
if($subquery !== '') {
array_unshift($this->parts['where'], $field. ' IN (' . $subquery . ')');
}
$modifyLimit = false;
}
}
$q .= ( ! empty($this->parts['where']))? ' WHERE ' . implode(' AND ', $this->parts['where']):'';
$q .= ( ! empty($this->parts['groupby']))? ' GROUP BY ' . implode(', ', $this->parts['groupby']):'';
$q .= ( ! empty($this->parts['having']))? ' HAVING ' . implode(' AND ', $this->parts['having']):'';
$q .= ( ! empty($this->parts['orderby']))? ' ORDER BY ' . implode(', ', $this->parts['orderby']):'';
if ($modifyLimit) {
$q = $this->conn->modifyLimitQuery($q, $this->parts['limit'], $this->parts['offset']);
}
// return to the previous state
if ( ! empty($string)) {
array_pop($this->parts['where']);
}
if ($needsSubQuery) {
array_shift($this->parts['where']);
}
return $q;
}
/**
* getLimitSubquery
* this is method is used by the record limit algorithm
*
* when fetching one-to-many, many-to-many associated data with LIMIT clause
* an additional subquery is needed for limiting the number of returned records instead
* of limiting the number of sql result set rows
*
* @return string the limit subquery
*/
public function getLimitSubquery()
{
$k = array_keys($this->tables);
$table = $this->tables[$k[0]];
// get short alias
$alias = $this->aliasHandler->getShortAlias($table->getTableName());
$primaryKey = $alias . '.' . $table->getIdentifier();
// initialize the base of the subquery
$subquery = 'SELECT DISTINCT ' . $primaryKey;
if ($this->conn->getDBH()->getAttribute(PDO::ATTR_DRIVER_NAME) == 'pgsql') {
// pgsql needs the order by fields to be preserved in select clause
foreach ($this->parts['orderby'] as $part) {
$e = explode(' ', $part);
// don't add primarykey column (its already in the select clause)
if ($e[0] !== $primaryKey) {
$subquery .= ', ' . $e[0];
}
}
}
$subquery .= ' FROM ' . $this->conn->quoteIdentifier($table->getTableName()) . ' ' . $alias;
foreach ($this->parts['join'] as $parts) {
foreach ($parts as $part) {
// preserve LEFT JOINs only if needed
if (substr($part,0,9) === 'LEFT JOIN') {
$e = explode(' ', $part);
if ( ! in_array($e[3], $this->subqueryAliases) &&
! in_array($e[2], $this->subqueryAliases)) {
continue;
}
}
$subquery .= ' '.$part;
}
}
// all conditions must be preserved in subquery
$subquery .= ( ! empty($this->parts['where']))? ' WHERE ' . implode(' AND ', $this->parts['where']) : '';
$subquery .= ( ! empty($this->parts['groupby']))? ' GROUP BY ' . implode(', ', $this->parts['groupby']) : '';
$subquery .= ( ! empty($this->parts['having']))? ' HAVING ' . implode(' AND ', $this->parts['having']) : '';
$subquery .= ( ! empty($this->parts['orderby']))? ' ORDER BY ' . implode(', ', $this->parts['orderby']) : '';
// add driver specific limit clause
$subquery = $this->conn->modifyLimitQuery($subquery, $this->parts['limit'], $this->parts['offset']);
$parts = self::quoteExplode($subquery, ' ', "'", "'");
foreach($parts as $k => $part) {
if(strpos($part, "'") !== false) {
continue;
}
if($this->aliasHandler->hasAliasFor($part)) {
$parts[$k] = $this->aliasHandler->generateNewAlias($part);
}
if(strpos($part, '.') !== false) {
$e = explode('.', $part);
$trimmed = ltrim($e[0], '( ');
$pos = strpos($e[0], $trimmed);
$e[0] = substr($e[0], 0, $pos) . $this->aliasHandler->generateNewAlias($trimmed);
$parts[$k] = implode('.', $e);
}
}
$subquery = implode(' ', $parts);
return $subquery;
}
/**
* tokenizeQuery
* splits the given dql query into an array where keys
* represent different query part names and values are
* arrays splitted using sqlExplode method
*
* example:
*
* parameter:
* $query = "SELECT u.* FROM User u WHERE u.name LIKE ?"
* returns:
* array('select' => array('u.*'),
* 'from' => array('User', 'u'),
* 'where' => array('u.name', 'LIKE', '?'))
*
* @param string $query DQL query
* @throws Doctrine_Query_Exception if some generic parsing error occurs
* @return array an array containing the query string parts
*/
public function tokenizeQuery($query)
{
$e = Doctrine_Tokenizer::sqlExplode($query, ' ');
foreach($e as $k=>$part) {
$part = trim($part);
switch(strtolower($part)) {
case 'delete':
case 'update':
case 'select':
case 'set':
case 'from':
case 'where':
case 'limit':
case 'offset':
case 'having':
$p = $part;
$parts[$part] = array();
break;
case 'order':
case 'group':
$i = ($k + 1);
if(isset($e[$i]) && strtolower($e[$i]) === "by") {
$p = $part;
$parts[$part] = array();
} else
$parts[$p][] = $part;
break;
case "by":
continue;
default:
if( ! isset($p))
throw new Doctrine_Query_Exception("Couldn't parse query.");
$parts[$p][] = $part;
}
}
return $parts;
}
/**
* DQL PARSER
* parses a DQL query
* first splits the query in parts and then uses individual
* parsers for each part
*
* @param string $query DQL query
* @param boolean $clear whether or not to clear the aliases
* @throws Doctrine_Query_Exception if some generic parsing error occurs
* @return Doctrine_Query
*/
public function parseQuery($query, $clear = true)
{
if ($clear) {
$this->clear();
}
$query = trim($query);
$query = str_replace("\n", ' ', $query);
$query = str_replace("\r", ' ', $query);
$parts = $this->tokenizeQuery($query);
foreach($parts as $k => $part) {
$part = implode(' ', $part);
switch(strtolower($k)) {
case 'create':
$this->type = self::CREATE;
break;
case 'insert':
$this->type = self::INSERT;
break;
case 'delete':
$this->type = self::DELETE;
break;
case 'select':
$this->type = self::SELECT;
$this->parseSelect($part);
break;
case 'update':
$this->type = self::UPDATE;
$k = 'FROM';
case 'from':
$class = 'Doctrine_Query_' . ucwords(strtolower($k));
$parser = new $class($this);
$parser->parse($part);
break;
case 'set':
$class = 'Doctrine_Query_' . ucwords(strtolower($k));
$parser = new $class($this);
$this->parts['set'][] = $parser->parse($part);
break;
case 'group':
case 'order':
$k .= 'by';
case 'where':
case 'having':
$class = 'Doctrine_Query_' . ucwords(strtolower($k));
$parser = new $class($this);
$name = strtolower($k);
$this->parts[$name][] = $parser->parse($part);
break;
case 'limit':
$this->parts['limit'] = trim($part);
break;
case 'offset':
$this->parts['offset'] = trim($part);
break;
}
}
return $this;
}
}
lib/Doctrine/Query/Select.php
View file @ a430d22c
......@@ -32,240 +32,10 @@ Doctrine::autoload("Doctrine_Query_Part");
*/
class Doctrine_Query_Select extends Doctrine_Query_Part
{
/**
* processPendingFields
* the fields in SELECT clause cannot be parsed until the components
* in FROM clause are parsed, hence this method is called everytime a
* specific component is being parsed.
*
* @throws Doctrine_Query_Exception if unknown component alias has been given
* @param string $componentAlias the alias of the component
* @return void
*/
public function processPendingFields($componentAlias)
public function parse($dql)
{
$tableAlias = $this->getTableAlias($componentAlias);
$table = $this->_aliasMap[$componentAlias]['table'];
if (isset($this->pendingFields[$componentAlias])) {
$fields = $this->pendingFields[$componentAlias];
// check for wildcards
if (in_array('*', $fields)) {
$fields = $table->getColumnNames();
} else {
// only auto-add the primary key fields if this query object is not
// a subquery of another query object
if ( ! $this->isSubquery) {
$fields = array_unique(array_merge($table->getPrimaryKeys(), $fields));
}
}
}
foreach ($fields as $name) {
$name = $table->getColumnName($name);
$this->parts['select'][] = $tableAlias . '.' .$name . ' AS ' . $tableAlias . '__' . $name;
}
$this->neededTables[] = $tableAlias;
}
/**
* parseSelect
* parses the query select part and
* adds selected fields to pendingFields array
*
* @param string $dql
*/
public function parseSelect($dql)
{
$refs = Doctrine_Query::bracketExplode($dql, ',');
foreach ($refs as $reference) {
if (strpos($reference, '(') !== false) {
if (substr($reference, 0, 1) === '(') {
// subselect found in SELECT part
$this->parseSubselect($reference);
} else {
$this->parseAggregateFunction2($reference);
}
} else {
$e = explode('.', $reference);
if (count($e) > 2) {
$this->pendingFields[] = $reference;
} else {
$this->pendingFields[$e[0]][] = $e[1];
}
}
}
}
/**
* 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)
{
$e = Doctrine_Query::bracketExplode($reference, ' ');
$alias = $e[1];
if (count($e) > 2) {
if (strtoupper($e[1]) !== 'AS') {
throw new Doctrine_Query_Exception('Syntax error near: ' . $reference);
}
$alias = $e[2];
}
$subquery = substr($e[0], 1, -1);
$this->pendingSubqueries[] = array($subquery, $alias);
}
public function parseAggregateFunction2($func)
{
$e = Doctrine_Query::bracketExplode($func, ' ');
$func = $e[0];
$pos = strpos($func, '(');
$name = substr($func, 0, $pos);
try {
$argStr = substr($func, ($pos + 1), -1);
$args = explode(',', $argStr);
$func = call_user_func_array(array($this->conn->expression, $name), $args);
if(substr($func, 0, 1) !== '(') {
$pos = strpos($func, '(');
$name = substr($func, 0, $pos);
} else {
$name = $func;
}
$e2 = explode(' ', $args[0]);
$distinct = '';
if(count($e2) > 1) {
if(strtoupper($e2[0]) == 'DISTINCT')
$distinct = 'DISTINCT ';
$args[0] = $e2[1];
}
$parts = explode('.', $args[0]);
$owner = $parts[0];
$alias = (isset($e[1])) ? $e[1] : $name;
$this->query->parseSelect($dql);
$e3 = explode('.', $alias);
if(count($e3) > 1) {
$alias = $e3[1];
$owner = $e3[0];
}
// a function without parameters eg. RANDOM()
if ($owner === '') {
$owner = 0;
}
$this->pendingAggregates[$owner][] = array($name, $args, $distinct, $alias);
} catch(Doctrine_Expression_Exception $e) {
throw new Doctrine_Query_Exception('Unknown function ' . $func . '.');
}
}
public function processPendingSubqueries()
{
if ($this->subqueriesProcessed === true) {
return false;
}
foreach ($this->pendingSubqueries as $value) {
list($dql, $alias) = $value;
$sql = $this->createSubquery()->parseQuery($dql, false)->getQuery();
reset($this->tableAliases);
$tableAlias = current($this->tableAliases);
reset($this->compAliases);
$componentAlias = key($this->compAliases);
$sqlAlias = $tableAlias . '__' . count($this->aggregateMap);
$this->parts['select'][] = '(' . $sql . ') AS ' . $sqlAlias;
$this->aggregateMap[$alias] = $sqlAlias;
$this->subqueryAggregates[$componentAlias][] = $alias;
}
$this->subqueriesProcessed = true;
return true;
}
public function processPendingAggregates($componentAlias)
{
$tableAlias = $this->getTableAlias($componentAlias);
if ( ! isset($this->tables[$tableAlias])) {
throw new Doctrine_Query_Exception('Unknown component path ' . $componentAlias);
}
$root = current($this->tables);
$table = $this->tables[$tableAlias];
$aggregates = array();
if(isset($this->pendingAggregates[$componentAlias])) {
$aggregates = $this->pendingAggregates[$componentAlias];
}
if ($root === $table) {
if (isset($this->pendingAggregates[0])) {
$aggregates += $this->pendingAggregates[0];
}
}
foreach($aggregates as $parts) {
list($name, $args, $distinct, $alias) = $parts;
$arglist = array();
foreach($args as $arg) {
$e = explode('.', $arg);
if (is_numeric($arg)) {
$arglist[] = $arg;
} elseif (count($e) > 1) {
//$tableAlias = $this->getTableAlias($e[0]);
$table = $this->tables[$tableAlias];
$e[1] = $table->getColumnName($e[1]);
if( ! $table->hasColumn($e[1])) {
throw new Doctrine_Query_Exception('Unknown column ' . $e[1]);
}
$arglist[] = $tableAlias . '.' . $e[1];
} else {
$arglist[] = $e[0];
}
}
$sqlAlias = $tableAlias . '__' . count($this->aggregateMap);
if(substr($name, 0, 1) !== '(') {
$this->parts['select'][] = $name . '(' . $distinct . implode(', ', $arglist) . ') AS ' . $sqlAlias;
} else {
$this->parts['select'][] = $name . ' AS ' . $sqlAlias;
}
$this->aggregateMap[$alias] = $sqlAlias;
$this->neededTables[] = $tableAlias;
}
return $this->query;
}
}
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