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ENHANCEMENT: Improved performance of DataObject::buildSQL(), by caching a suitable interim piece.

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git-svn-id: svn://svn.silverstripe.com/silverstripe/open/modules/sapphire/trunk@83441 467b73ca-7a2a-4603-9d3b-597d59a354a9
This commit is contained in:
Sam Minnee 2009-07-31 05:41:59 +00:00
parent c7ac19f144
commit 51e28f078c
1 changed files with 78 additions and 64 deletions
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142
core/model/DataObject.php
View File

@ -215,8 +215,8 @@ class DataObject extends ViewableData implements DataObjectInterface, i18nEntity
if($hasOne) foreach(array_keys($hasOne) as $field) {
$fields[$field . 'ID'] = 'ForeignKey';
}
return (array) $fields;
return (array)$fields;
}
@ -2366,6 +2366,76 @@ class DataObject extends ViewableData implements DataObjectInterface, i18nEntity
* @return SQLQuery Query built.
*/
public function buildSQL($filter = "", $sort = "", $limit = "", $join = "", $restrictClasses = true, $having = "") {
// Cache the big hairy part of buildSQL
if(!isset(self::$cache_buildSQL_query[$this->class])) {
// Get the tables to join to
$tableClasses = ClassInfo::dataClassesFor($this->class);
if(!$tableClasses) {
if(!ManifestBuilder::has_been_included()) {
user_error("DataObjects have been requested before the manifest is loaded. Please ensure you are not querying the database in _config.php.", E_USER_ERROR);
} else {
user_error("DataObject::buildSQL: Can't find data classes (classes linked to tables) for $this->class. Please ensure you run dev/build after creating a new DataObject.", E_USER_ERROR);
}
}
$baseClass = array_shift($tableClasses);
// Build our intial query
$query = new SQLQuery(array());
$query->from("\"$baseClass\"");
// Add SQL for multi-value fields on the base table
$databaseFields = self::database_fields($baseClass);
if($databaseFields) foreach($databaseFields as $k => $v) {
if(!in_array($k, array('ClassName', 'LastEdited', 'Created')) && ClassInfo::classImplements($v, 'CompositeDBField')) {
$this->dbObject($k)->addToQuery($query);
} else {
$query->select[] = "\"$baseClass\".\"$k\"";
}
}
// Join all the tables
if($tableClasses && self::$subclass_access) {
foreach($tableClasses as $tableClass) {
$query->from[$tableClass] = "LEFT JOIN \"$tableClass\" ON \"$tableClass\".\"ID\" = \"$baseClass\".\"ID\"";
// Add SQL for multi-value fields
$databaseFields = self::database_fields($tableClass);
if($databaseFields) foreach($databaseFields as $k => $v) {
if(ClassInfo::classImplements($v, 'CompositeDBField')) {
singleton($tableClass)->dbObject($k)->addToQuery($query);
} else {
$query->select[] = "\"$tableClass\".\"$k\"";
}
}
}
}
$query->select[] = "\"$baseClass\".\"ID\"";
$query->select[] = "CASE WHEN \"$baseClass\".\"ClassName\" IS NOT NULL THEN \"$baseClass\".\"ClassName\" ELSE '$baseClass' END AS \"RecordClassName\"";
// Get the ClassName values to filter to
$classNames = ClassInfo::subclassesFor($this->class);
if(!$classNames) {
user_error("DataObject::get() Can't find data sub-classes for '$callerClass'");
}
// If querying the base class, don't bother filtering on class name
if($restrictClasses && $this->class != $baseClass) {
// Get the ClassName values to filter to
$classNames = ClassInfo::subclassesFor($this->class);
if(!$classNames) {
user_error("DataObject::get() Can't find data sub-classes for '$callerClass'");
}
$query->where[] = "\"$baseClass\".\"ClassName\" IN ('" . implode("','", $classNames) . "')";
}
self::$cache_buildSQL_query[$this->class] = clone $query;
} else {
$query = clone self::$cache_buildSQL_query[$this->class];
}
// Find a default sort
if(!$sort) {
$sort = $this->stat('default_sort');
@ -2373,71 +2443,10 @@ class DataObject extends ViewableData implements DataObjectInterface, i18nEntity
// Add quoting to sort expression if it's a simple column name
if(preg_match('/^[A-Z][A-Z0-9_]*$/i', $sort)) $sort = "\"$sort\"";
// Get the tables to join to
$tableClasses = ClassInfo::dataClassesFor($this->class);
if(!$tableClasses) {
if(!ManifestBuilder::has_been_included()) {
user_error("DataObjects have been requested before the manifest is loaded. Please ensure you are not querying the database in _config.php.", E_USER_ERROR);
} else {
user_error("DataObject::buildSQL: Can't find data classes (classes linked to tables) for $this->class. Please ensure you run dev/build after creating a new DataObject.", E_USER_ERROR);
}
}
$baseClass = array_shift($tableClasses);
// Build our intial query
$query = new SQLQuery(array());
$query->from("\"$baseClass\"");
$query->where($filter);
$query->orderby($sort);
$query->limit($limit);
// Add SQL for multi-value fields on the base table
$databaseFields = self::database_fields($baseClass);
if($databaseFields) foreach($databaseFields as $k => $v) {
if(!in_array($k, array('ClassName', 'LastEdited', 'Created')) && ClassInfo::classImplements($v, 'CompositeDBField')) {
$this->dbObject($k)->addToQuery($query);
} else {
$query->select[] = "\"$baseClass\".\"$k\"";
}
}
// Join all the tables
if($tableClasses && self::$subclass_access) {
foreach($tableClasses as $tableClass) {
$query->from[$tableClass] = "LEFT JOIN \"$tableClass\" ON \"$tableClass\".\"ID\" = \"$baseClass\".\"ID\"";
// Add SQL for multi-value fields
$databaseFields = self::database_fields($tableClass);
if($databaseFields) foreach($databaseFields as $k => $v) {
if(ClassInfo::classImplements($v, 'CompositeDBField')) {
singleton($tableClass)->dbObject($k)->addToQuery($query);
} else {
$query->select[] = "\"$tableClass\".\"$k\"";
}
}
}
}
$query->select[] = "\"$baseClass\".\"ID\"";
$query->select[] = "CASE WHEN \"$baseClass\".\"ClassName\" IS NOT NULL THEN \"$baseClass\".\"ClassName\" ELSE '$baseClass' END AS \"RecordClassName\"";
// Get the ClassName values to filter to
$classNames = ClassInfo::subclassesFor($this->class);
if(!$classNames) {
user_error("DataObject::get() Can't find data sub-classes for '$callerClass'");
}
// If querying the base class, don't bother filtering on class name
if($restrictClasses && $this->class != $baseClass) {
// Get the ClassName values to filter to
$classNames = ClassInfo::subclassesFor($this->class);
if(!$classNames) {
user_error("DataObject::get() Can't find data sub-classes for '$callerClass'");
}
$query->where[] = "\"$baseClass\".\"ClassName\" IN ('" . implode("','", $classNames) . "')";
}
if($having) {
$query->having[] = $having;
@ -2457,6 +2466,11 @@ class DataObject extends ViewableData implements DataObjectInterface, i18nEntity
return $query;
}
/**
* Cache for the hairy bit of buildSQL
*/
private static $cache_buildSQL_query;
/**
* Like {@link buildSQL}, but applies the extension modifications.