public int getDisplaySize()

in src/main/java/com/amazon/redshift/jdbc/TypeInfoCache.java [812:912]
86 lines of code
39 McCabe index (conditional complexity)

  public int getDisplaySize(int oid, int typmod) {
    oid = convertArrayToBaseOid(oid);
    switch (oid) {
      case Oid.INT2:
        return 6; // -32768 to +32767
      case Oid.INT4:
        return 11; // -2147483648 to +2147483647
      case Oid.OID:
        return 10; // 0 to 4294967295
      case Oid.INT8:
      case Oid.XIDOID:
        return 20; // -9223372036854775808 to +9223372036854775807
      case Oid.FLOAT4:
        // varies based upon the extra_float_digits GUC.
        // These values are for the longest possible length.
        return 15; // sign + 9 digits + decimal point + e + sign + 2 digits
      case Oid.FLOAT8:
        return 25; // sign + 18 digits + decimal point + e + sign + 3 digits
      case Oid.CHAR:
        return 1;
      case Oid.BOOL:
        return 1;
      case Oid.DATE:
        return 13; // "4713-01-01 BC" to "01/01/4713 BC" - "31/12/32767"
      case Oid.TIME:
      case Oid.TIMETZ:
      case Oid.TIMESTAMP:
      case Oid.TIMESTAMPTZ:
        // Calculate the number of decimal digits + the decimal point.
        int secondSize;
        switch (typmod) {
          case -1:
            secondSize = 6 + 1;
            break;
          case 0:
            secondSize = 0;
            break;
          case 1:
            // Bizarrely SELECT '0:0:0.1'::time(1); returns 2 digits.
            secondSize = 2 + 1;
            break;
          default:
            secondSize = typmod + 1;
            break;
        }

        // We assume the worst case scenario for all of these.
        // time = '00:00:00' = 8
        // date = '5874897-12-31' = 13 (although at large values second precision is lost)
        // date = '294276-11-20' = 12 --enable-integer-datetimes
        // zone = '+11:30' = 6;

        switch (oid) {
          case Oid.TIME:
            return 8 + secondSize;
          case Oid.TIMETZ:
            return 8 + secondSize + 6;
          case Oid.TIMESTAMP:
            return 13 + 1 + 8 + secondSize;
          case Oid.TIMESTAMPTZ:
            return 13 + 1 + 8 + secondSize + 6;
        }
      case Oid.INTERVAL:
        // SELECT LENGTH('-123456789 years 11 months 33 days 23 hours 10.123456 seconds'::interval);
        return 49;
      case Oid.VARCHAR:
      case Oid.BPCHAR:
      case Oid.SUPER:
      case Oid.VARBYTE:
      case Oid.TIDOID:
      case Oid.ABSTIMEOID:
        if (typmod == -1) {
          return unknownLength;
        }
        return typmod - 4;
      case Oid.NUMERIC:
        if (typmod == -1) {
          return 131089; // SELECT LENGTH(pow(10::numeric,131071)); 131071 = 2^17-1
        }
        int precision = (typmod - 4 >> 16) & 0xffff;
        int scale = (typmod - 4) & 0xffff;
        // sign + digits + decimal point (only if we have nonzero scale)
        return 1 + precision + (scale != 0 ? 1 : 0);
      case Oid.BIT:
        return typmod;
      case Oid.VARBIT:
        if (typmod == -1) {
          return unknownLength;
        }
        return typmod;

      case Oid.NAME:
      	return 64;
        
      case Oid.TEXT:
      case Oid.BYTEA:
        return unknownLength;
      default:
        return unknownLength;
    }
  }