presto-main/src/main/java/io/prestosql/connector/informationschema/InformationSchemaMetadata.java/InformationSchemaMetadata/defaultPrefixes
class InformationSchemaMetadata:    public static Set<QualifiedTablePrefix> defaultPrefixes(String catalogName)
    {
        return ImmutableSet.of(new QualifiedTablePrefix(catalogName));
    }