Unicode Pass Through (UPT) is a Unicode error handling feature. The feature gives users the ability to allow Pass Through Characters (PTCs) to be imported into and exported from Teradata. This increases the repertoire of characters available to Unicode users and provides the ability to store, retrieve, and analyze Emoji and other ideographs.
PTCs consist of the following:
- Characters not supported by Teradata:
- Characters in BMP (Basic Multilingual Plane) from Unicode versions 6.1.0 to 9.0.0
- Characters in SMP (Supplementary Planes 1 to 16) from all Unicode versions
These are the current unsupported characters in Teradata. This may change in the future if Teradata adds support for additional characters. - Unassigned characters
- Private use characters
Unassigned characters are not assigned in the Unicode Standard and not supported by any implementation. Private use characters will never be assigned in the Unicode Standard and the usage is determined by a private agreement among cooperating implementations.
The following are not PTCs:
- 6.0 BMP characters supported by Teradata
- The set of noncharacter code points
Noncharacters are code points that are permanently reserved for internal use.
You should not use UPT if you rely on Teradata to screen out Teradata unsupported characters or the REPLACEMENT CHARACTER (U+FFFD).
Examples of PTCs and Noncharacters
| Unicode Code Point | Plane | UTF-16 in hex | Unicode Name, <noncharacter>, or <unassigned> | Notes |
|---|---|---|---|---|
| U+20BD | 0 | 20BD | RUBLE SIGN | Basic Multilingual Plane (BMP) |
| U+1F600 | 1 | D83D DE00 | GRINNING FACE | Supplementary Multilingual Plane (SMP) |
| U+20000 | 2 | D840 DC00 | CJK Unified Ideographs Extension B | Supplementary Ideographic Plane (SIP) |
| U+35555 | 3 | D895 DD55 | <unassigned> | Tertiary Ideographic Plane (TIP). No assigned characters. |
| U+46666 | 4 | D8D9 DE66 | <unassigned> | No characters defined on plane 4 |
| U+5FFFE | 5 | D93F DFFE | <noncharacter> | No characters defined on plane 5 |
| U+6FFFF | 6 | D97F DFFF | <noncharacter> | No characters defined on plane 6 |
| U+E0103 | 14 | DB40 DD03 | VARIATION SELECTOR-20 | Supplementary S |
| U+FFFF0 | 15 | DBBF DFF0 | <unassigned> | Supplementary Private Use Area-A |
| U+10FFFD | 16 | DBFF DFFD | <unassigned> | Supplementary Private Use Area-B |