Native (Bulk) Caching Limitations
Depending on your cache target, there are a few limitations to be aware of when trying to use this performance option.
DB2 Native (Bulk) Loading Caching Limitations
When bulk load is in use, the following data types cannot be cached to DB2:
|
Data Source |
Data Types Not Supported |
Cache Target |
|
Oracle |
BLOB and LONGRAW |
DB2 |
|
SQL Server |
BINARY and VARBINARY |
DB2 |
|
Sybase IQ |
BINARY, BLOB, and VARBINARY |
DB2 |
TDV Native Loading Option MySQL Limitation
The TDV native load option cannot load binary data.
TDV Native Loading Option Teradata Limitation
If the TDV native load option is active and the data identified to be moved to the cache has one or more duplicate rows, Teradata 13 will allow the duplicate rows.
TDV Native Loading Option Database Link Limitations
For database links, the following data type and function support restrictions exist.
|
Data Source |
Cache Target |
Data Types Not Supported |
Notes |
|
DB2 |
Oracle 11g |
REAL, GRAPHIC, LONGVARCHAR, TIME, TIMESTAMP, BLOB, CLOB |
CAST, AVG, and SUM functions lose precision |
|
Sybase ASE 15 |
Oracle 11g |
TEXT, IMAGE |
AVG, COUNT, MAX, MIN, and SUM functions are not supported. |
|
Oracle 11g |
Oracle 11g |
BLOB, CLOB AND NCLOB LONGRAW AND LONG |
|
|
SQL Server 2008 |
Oracle 11g |
NTEXT, TEXT, DATE, IMAGE Oracle treats empty strings as NULL values. |
|