Internal Representation of INTERVAL DAY TO SECOND
Conceptually, INTERVAL DAY TO SECOND is a record that has the following fields.
| Field Name | Storage Format | Total Length |
|---|---|---|
| DAY | SMALLINT | 10 bytes |
| HOUR | SMALLINT | |
| MINUTE | SMALLINT | |
| SECOND | INTEGER |
External Representation of INTERVAL DAY TO SECOND
INTERVAL DAY TO 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 + 10) |
| Format: '-d(precision) hh:mm:ss' | |
| n where n is 1 - 6 |
Type: CHARACTER(precision + n + 11) |
| Format: '-d(precision) hh:mm:ss.s(n)' |
For example, for INTERVAL DAY (4) TO SECOND(3), the value might be something like ' 125 12:27:31.125 '.
The DAY field has two leading blanks. The first is for a sign, which is not present for positive intervals. The second is to preserve the fixed size of the DAY field at four digits.
Range of Values
The range of values for INTERVAL DAY TO SECOND is as follows.
| Type, Precision, and Fractional Seconds Precision | Minimum Value | Maximum Value |
|---|---|---|
| INTERVAL DAY(1) TO SECOND(0) | -'9 23:59:59' | '9 23:59:59' |
| INTERVAL DAY(1) TO SECOND(1) | -'9 23:59:59.9' | '9 23:59:59.9' |
| INTERVAL DAY(1) TO SECOND(2) | -'9 23:59:59.99' | '9 23:59:59.99' |
| INTERVAL DAY(1) TO SECOND(3) | -'9 23:59:59.999' | '9 23:59:59.999' |
| INTERVAL DAY(1) TO SECOND(4) | -'9 23:59:59.9999' | '9 23:59:59.9999' |
| INTERVAL DAY(1) TO SECOND(5) | -'9 23:59:59.99999' | '9 23:59:59.99999' |
| INTERVAL DAY(1) TO SECOND(6) | -'9 23:59:59.999999' | '9 23:59:59.999999' |
| INTERVAL DAY(2) TO SECOND(0) | -'99 23:59:59' | '99 23:59:59' |
| INTERVAL DAY(2) TO SECOND(1) | -'99 23:59:59.9' | '99 23:59:59.9' |
| INTERVAL DAY(2) TO SECOND(2) | -'99 23:59:59.99' | '99 23:59:59.99' |
| INTERVAL DAY(2) TO SECOND(3) | -'99 23:59:59.999' | '99 23:59:59.999' |
| INTERVAL DAY(2) TO SECOND(4) | -'99 23:59:59.9999' | '99 23:59:59.9999' |
| INTERVAL DAY(2) TO SECOND(5) | -'99 23:59:59.99999' | '99 23:59:59.99999' |
| INTERVAL DAY(2) TO SECOND(6) | -'99 23:59:59.999999' | '99 23:59:59.999999' |
| INTERVAL DAY(3) TO SECOND(0) | -'999 23:59:59' | '999 23:59:59' |
| INTERVAL DAY(3) TO SECOND(1) | -'999 23:59:59.9' | '999 23:59:59.9' |
| INTERVAL DAY(3) TO SECOND(2) | -'999 23:59:59.99' | '999 23:59:59.99' |
| INTERVAL DAY(3) TO SECOND(3) | -'999 23:59:59.999' | '999 23:59:59.999' |
| INTERVAL DAY(3) TO SECOND(4) | -'999 23:59:59.9999' | '999 23:59:59.9999' |
| INTERVAL DAY(3) TO SECOND(5) | -'999 23:59:59.99999' | '999 23:59:59.99999' |
| INTERVAL DAY(3) TO SECOND(6) | -'999 23:59:59.999999' | '999 23:59:59.999999' |
| INTERVAL DAY(4) TO SECOND(0) | -'9999 23:59:59' | '9999 23:59:59' |
| INTERVAL DAY(4) TO SECOND(1) | -'9999 23:59:59.9' | '9999 23:59:59.9' |
| INTERVAL DAY(4) TO SECOND(2) | -'9999 23:59:59.99' | '9999 23:59:59.99' |
| INTERVAL DAY(4) TO SECOND(3) | -'9999 23:59:59.999' | '9999 23:59:59.999' |
| INTERVAL DAY(4) TO SECOND(4) | -'9999 23:59:59.9999' | '9999 23:59:59.9999' |
| INTERVAL DAY(4) TO SECOND(5) | -'9999 23:59:59.99999' | '9999 23:59:59.99999' |
| INTERVAL DAY(4) TO SECOND(6) | -'9999 23:59:59.999999' | '9999 23:59:59.999999' |
Implicit and Explicit INTERVAL DAY TO 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.