presto-tpcds/src/main/java/io/prestosql/plugin/tpcds/TpcdsMetadata.java/TpcdsMetadata/schemaNameToScaleFactor
class TpcdsMetadata:    public static double schemaNameToScaleFactor(String schemaName)
    {
        if (TINY_SCHEMA_NAME.equals(schemaName)) {
            return TINY_SCALE_FACTOR;
        }

        if (!schemaName.startsWith("sf")) {
            return -1;
        }

        try {
            return Double.parseDouble(schemaName.substring(2));
        }
        catch (Exception ignored) {
            return -1;
        }
    }