presto-hive/src/main/java/io/prestosql/plugin/hive/metastore/file/FileHiveMetastore.java/FileHiveMetastore/verifyTableNotExists
class FileHiveMetastore:    private void verifyTableNotExists(String newDatabaseName, String newTableName)
    {
        if (getTable(newDatabaseName, newTableName).isPresent()) {
            throw new TableAlreadyExistsException(new SchemaTableName(newDatabaseName, newTableName));
        }
    }