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<?php
namespace SMW\SQLStore\EntityStore\DIHandlers;
use SMW\SQLStore\EntityStore\DataItemHandler;
use SMW\SQLStore\EntityStore\Exception\DataItemHandlerException;
use SMW\SQLStore\TableBuilder\FieldType;
use SMWDataItem as DataItem;
use SMWDINumber as DINumber;
/**
* This class implements Store access to Number data items.
*
* @license GNU GPL v2+
* @since 1.8
*
* @author Nischay Nahata
*/
class DINumberHandler extends DataItemHandler {
/**
* @since 1.8
*
* {@inheritDoc}
*/
public function getTableFields() {
return [
'o_serialized' => FieldType::FIELD_TITLE,
'o_sortkey' => FieldType::TYPE_DOUBLE
];
}
/**
* @since 1.8
*
* {@inheritDoc}
*/
public function getFetchFields() {
return [
'o_serialized' => FieldType::FIELD_TITLE
];
}
/**
* @since 1.8
*
* {@inheritDoc}
*/
public function getTableIndexes() {
return [
// API module pvalue lookup
'p_id,o_serialized',
'p_id,o_sortkey',
// QueryEngine::getInstanceQueryResult
's_id,p_id,o_sortkey',
];
}
/**
* @since 3.0
*
* {@inheritDoc}
*/
public function getIndexHint( $key ) {
// Store::getPropertySubjects has seen to choose the wrong index
// SELECT smw_id, smw_title, smw_namespace, smw_iw, smw_subobject, smw_sortkey, smw_sort
// FROM `smw_object_ids` INNER JOIN `smw_di_number` AS t1 FORCE INDEX(s_id) ON t1.s_id=smw_id
// WHERE t1.p_id='310194' AND smw_iw!=':smw' AND smw_iw!=':smw-delete' AND smw_iw!=':smw-redi'
// GROUP BY smw_sort, smw_id
// LIMIT 26
//
// 584.9450ms SMWSQLStore3Readers::getPropertySubjects
//
// vs.
//
// SELECT smw_id, smw_title, smw_namespace, smw_iw, smw_subobject, smw_sortkey, smw_sort
// FROM `smw_object_ids`
// INNER JOIN `smw_di_number` AS t1 ON t1.s_id=smw_id
// WHERE t1.p_id='310194' AND smw_iw!=':smw' AND smw_iw!=':smw-delete' AND smw_iw!=':smw-redi'
// GROUP BY smw_sort, smw_id
// LIMIT 26
//
// 21448.2622ms SMWSQLStore3Readers::getPropertySubjects
if ( 'property.subjects' && $this->isDbType( 'mysql' ) ) {
return 's_id';
}
return '';
}
/**
* @since 1.8
*
* {@inheritDoc}
*/
public function getWhereConds( DataItem $dataItem ) {
return [
'o_sortkey' => floatval( $dataItem->getNumber() )
];
}
/**
* @since 1.8
*
* {@inheritDoc}
*/
public function getInsertValues( DataItem $dataItem ) {
return [
'o_serialized' => $dataItem->getSerialization(),
'o_sortkey' => floatval( $dataItem->getNumber() )
];
}
/**
* @since 1.8
*
* {@inheritDoc}
*/
public function getIndexField() {
return 'o_sortkey';
}
/**
* @since 1.8
*
* {@inheritDoc}
*/
public function getLabelField() {
return 'o_serialized';
}
/**
* @since 1.8
*
* {@inheritDoc}
*/
public function dataItemFromDBKeys( $dbkeys ) {
if ( is_string( $dbkeys ) ) {
return DINumber::doUnserialize( $dbkeys );
}
throw new DataItemHandlerException( 'Failed to create data item from DB keys.' );
}
}
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