Internal Representation of INTERVAL SECOND
Conceptually, the internal representation of INTERVAL SECOND consists of the following fields.
| Field Name | Storage Format | Total Length |
|---|---|---|
| WHOLE SECONDS | SMALLINT | 6 bytes |
| FRACTIONAL SECONDS | INTEGER |
External Representation of INTERVAL SECOND
INTERVAL SECOND types are imported and exported in record and indicator modes as CHARACTER data using the client character set.
| WHEN fractional_seconds_precision is … | THEN the type and format are ... |
|---|---|
| 0 | Type: CHARACTER(precision + 1) |
| Format: '-s(precision)' | |
| n where n is 1 - 6 |
Type: CHARACTER(precision + n + 2) |
| Format: '-s(precision).s(n)' |
For example, for INTERVAL SECOND(3,2), the value might be something like '-127.35'.
Range of Values
The range of values for INTERVAL SECOND is as follows.
| Type, Precision, and Fractional Seconds Precision | Minimum Value | Maximum Value |
|---|---|---|
| INTERVAL SECOND(1,0) | -'9' | '9' |
| INTERVAL SECOND(1,1) | -'9.9' | '9.9' |
| INTERVAL SECOND(1,2) | -'9.99' | '9.99' |
| INTERVAL SECOND(1,3) | -'9.999' | '9.999' |
| INTERVAL SECOND(1,4) | -'9.9999' | '9.9999' |
| INTERVAL SECOND(1,5) | -'9.99999' | '9.99999' |
| INTERVAL SECOND(1,6) | -'9.999999' | '9.999999' |
| INTERVAL SECOND(2,0) | -'99' | '99' |
| INTERVAL SECOND(2,1) | -'99.9' | '99.9' |
| INTERVAL SECOND(2,2) | -'99.99' | '99.99' |
| INTERVAL SECOND(2,3) | -'99.999' | '99.999' |
| INTERVAL SECOND(2,4) | -'99.9999' | '99.9999' |
| INTERVAL SECOND(2,5) | -'99.99999' | '99.99999' |
| INTERVAL SECOND(2,6) | -'99.999999' | '99.999999' |
| INTERVAL SECOND(3,0) | -'999' | '999' |
| INTERVAL SECOND(3,1) | -'999.9' | '999.9' |
| INTERVAL SECOND(3,2) | -'999.99' | '999.99' |
| INTERVAL SECOND(3,3) | -'999.999' | '999.999' |
| INTERVAL SECOND(3,4) | -'999.9999' | '999.9999' |
| INTERVAL SECOND(3,5) | -'999.99999' | '999.99999' |
| INTERVAL SECOND(3,6) | -'999.999999' | '999.999999' |
| INTERVAL SECOND(4,0) | -'9999' | '9999' |
| INTERVAL SECOND(4,1) | -'9999.9' | '9999.9' |
| INTERVAL SECOND(4,2) | -'9999.99' | '9999.99' |
| INTERVAL SECOND(4,3) | -'9999.999' | '9999.999' |
| INTERVAL SECOND(4,4) | -'9999.9999' | '9999.9999' |
| INTERVAL SECOND(4,5) | -'9999.99999' | '9999.99999' |
| INTERVAL SECOND(4,6) | -'9999.999999' | '9999.999999' |
Implicit and Explicit INTERVAL SECOND Conversion
Vantage performs implicit conversion from one Interval data type to another Interval type in some cases. You can also use CAST to explicitly convert one Interval type to another.
Conversions are possible only within the same INTERVAL family. For example, you may convert a YEAR interval to months, but not to days or hours.
For more information, see Teradata Vantage™ - SQL Functions, Expressions, and Predicates, B035-1145.