VersionPress\Database\TableSchemaStorage::deleteAll PHP Method

    public function deleteAll()
    {
        FileSystem::removeContent($this->directory);
    }

function vp_update_table_ddl_scripts(DbSchemaInfo $dbSchemaInfo, TableSchemaStorage $tableSchemaStorage)
{
    $tableSchemaStorage->deleteAll();
    $entityNames = $dbSchemaInfo->getAllEntityNames();
    foreach ($entityNames as $entityName) {
        $table = $dbSchemaInfo->getPrefixedTableName($entityName);
        $tableSchemaStorage->saveSchema($table);
    }
    $referenceDetails = $dbSchemaInfo->getAllMnReferences();
    foreach ($referenceDetails as $referenceDetail) {
        $table = $dbSchemaInfo->getPrefixedTableName($referenceDetail['junction-table']);
        $tableSchemaStorage->saveSchema($table);
    }
}