INTERVAL data type
Informix®
Informix provides the INTERVAL data type to store a value that represents a
span of time.
INTERVAL types are divided into two classes:- Intervals of year-month class such as
INTERVAL YEAR(5) TO MONTH - Intervals of day-time class such as
INTERVAL DAY(9) TO SECOND
INTERVAL columns can be defined with various time units, by specifying a
start and end qualifier. For example, you can define an interval to store a number of hours and
minutes with INTERVAL HOUR(n) TO MINUTE, where
n defines the maximum number of digits for the hours unit.The values of Informix
INTERVAL can be represented with a
character string literal, or as INTERVAL()
literals:'-9834 15:45:12.345' -- an INTERVAL DAY(6) TO FRACTION(3)
'7623-11' -- an INTERVAL YEAR(9) TO MONTH
INTERVAL(18734:45) HOUR(5) TO MINUTE
INTERVAL(-7634-11) YEAR(5) TO MONTHOracle® MySQL and MariaDB
MySQL and MariadDB support an
INTERVAL data type. However, the interval values
are used mainly for date/time calculations
like:SELECT NOW() + INTERVAL 5 MINUTEIt is not possible to create a MySQL/MariadDB table column with an interval type.
Solution
The INTERVAL data type and values are converted CHAR(50) column
with MySQL.
INTERVAL values can be stored and retrieved from the database. However, interval
arithmetics cannot be performed on the database side in SQL statements.
The
INTERVAL types translation can be controlled with the following FGLPROFILE
entry:dbi.database.dsname.ifxemul.datatype.interval = { true | false }