General - Analytics Database - Teradata Vantage
ANSI Temporal Table Support
- Deployment
- VantageCloud
- VantageCore
- Edition
- Enterprise
- IntelliFlex
- VMware
- Product
- Analytics Database
- Teradata Vantage
- Release Number
- 17.20
- Published
- June 2022
- ft:locale
- en-US
- ft:lastEdition
- 2023-10-30
- dita:mapPath
- jqu1628112571823.ditamap
- dita:ditavalPath
- qkf1628213546010.ditaval
- dita:id
- esa1472244798285
- lifecycle
- latest
- Product Category
- Teradata Vantage™
- Valid time is the Teradata implementation of what ANSI calls “application time.”
- The valid_start and valid_end columns must be defined as NOT NULL.
- The data types of the valid_start and valid_end columns must match.
- To function as a temporal table, the valid-time table must be defined AS VALIDTIME. System-time tables do not have valid time.
- A table can have only one valid-time period definition.
- A valid-time table cannot be a queue, error, or global temporary trace table.
- Statistics cannot be collected on the valid-time derived period column, but they can be collected on the component start and end time columns.
- Algorithmic compression (ALC) is not allowed on DateTime columns that act as the beginning and ending bound values of a temporal derived period column.