public function up(Schema $schema)
{
$this->abortIf($this->connection->getDatabasePlatform()->getName() != "postgresql");
// collect foreign keys pointing to "our" tables
$tableNames = array('typo3_typo3cr_migration_domain_model_migrationstatus', 'typo3_typo3cr_domain_model_contentobjectproxy', 'typo3_typo3cr_domain_model_node', 'typo3_typo3cr_domain_model_workspace');
$foreignKeyHandlingSql = Service::getForeignKeyHandlingSql($schema, $this->platform, $tableNames, 'flow3_persistence_identifier', 'persistence_object_identifier');
// drop FK constraints
foreach ($foreignKeyHandlingSql['drop'] as $sql) {
$this->addSql($sql);
}
// rename identifier fields
$this->addSql("ALTER TABLE typo3_typo3cr_migration_domain_model_migrationstatus RENAME COLUMN flow3_persistence_identifier TO persistence_object_identifier");
$this->addSql("ALTER TABLE typo3_typo3cr_domain_model_contentobjectproxy RENAME COLUMN flow3_persistence_identifier TO persistence_object_identifier");
$this->addSql("ALTER TABLE typo3_typo3cr_domain_model_node RENAME COLUMN flow3_persistence_identifier TO persistence_object_identifier");
$this->addSql("ALTER TABLE typo3_typo3cr_domain_model_workspace RENAME COLUMN flow3_persistence_identifier TO persistence_object_identifier");
// add back FK constraints
foreach ($foreignKeyHandlingSql['add'] as $sql) {
$this->addSql($sql);
}
}