presto-mongodb/src/main/java/io/prestosql/plugin/mongodb/MongoSession.java/MongoSession/getAllTables
class MongoSession:    public Set<String> getAllTables(String schema)
            throws SchemaNotFoundException
    {
        ImmutableSet.Builder<String> builder = ImmutableSet.builder();

        builder.addAll(ImmutableList.copyOf(client.getDatabase(schema).listCollectionNames()).stream()
                .filter(name -> !name.equals(schemaCollection))
                .filter(name -> !SYSTEM_TABLES.contains(name))
                .collect(toSet()));
        builder.addAll(getTableMetadataNames(schema));

        return builder.build();
    }