17.10 - Usage Notes - Advanced SQL Engine - Teradata Database

Teradata Vantage™ - Data Types and Literals

Product
Advanced SQL Engine
Teradata Database
Release Number
17.10
Release Date
July 2021
Content Type
Programming Reference
Publication ID
B035-1143-171K
Language
English (United States)

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.