/**
* {@inheritdoc}
*/
protected function getLockTablesSql($lockMode)
{
$joinSql = '';
$identifierColumns = $this->class->getIdentifierColumnNames();
$baseTableAlias = $this->getSQLTableAlias($this->class->name);
// INNER JOIN parent tables
foreach ($this->class->parentClasses as $parentClassName) {
$conditions = array();
$tableAlias = $this->getSQLTableAlias($parentClassName);
$parentClass = $this->em->getClassMetadata($parentClassName);
$joinSql .= ' INNER JOIN ' . $this->quoteStrategy->getTableName($parentClass, $this->platform) . ' ' . $tableAlias . ' ON ';
foreach ($identifierColumns as $idColumn) {
$conditions[] = $baseTableAlias . '.' . $idColumn . ' = ' . $tableAlias . '.' . $idColumn;
}
$joinSql .= implode(' AND ', $conditions);
}
return parent::getLockTablesSql($lockMode) . $joinSql;
}