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 MONTHIBM® DB2®
IBM DB2 does not
provide a data type corresponding the Informix
INTERVAL data type.
Solution
The INTERVAL data type and values are converted CHAR(50) column
with IBM DB2.
INTERVAL values can be stored and retrieved from the database. However, since
IBM DB2 does not support
a native interval type, 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 }