Datatype conversions change an expression from one datatype to another, and reformat the display format for date and time information.
SAP ASE performs certain datatype conversions, called implicit conversions. For example, if you compare a char expression and a datetime expression, or a smallint expression and an int expression, or char expressions of different lengths, SAP ASE automatically converts one datatype to another.
For other conversions, called explicit conversions, you must use a datatype conversion function to make the datatype conversion. For example, before concatenating numeric expressions, you must convert them to character expressions. If you attempt to explicitly convert a date to a datetime and the value is outside the datetime range such as “Jan 1, 1000” the conversion is not allowed and an error message appears.
E – explicit datatype conversion required.
I – conversion can be explicit or implicit.
U – datatype conversion is not allowed.
From |
binary |
varbinary |
bit |
[n]char |
[n]varchar |
datetime |
smalldatetime |
bigdatetime |
bigtime |
tinyint |
smallint |
unsigned smallint |
int |
unsigned int |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
binary |
– |
I |
I |
I |
I |
U |
U |
I |
I |
I |
I |
I |
I |
I |
varbinary |
I |
– |
I |
I |
I |
U |
U |
I |
I |
I |
I |
I |
I |
I |
bit |
I |
I |
– |
I |
I |
U |
U |
U |
U |
I |
I |
I |
I |
I |
[n]char |
I |
I |
E |
– |
I |
I |
I |
I |
I |
E |
E |
E |
E |
E |
[n]varchar |
I |
I |
E |
I |
– |
I |
I |
I |
I |
E |
E |
E |
E |
E |
datetime |
I |
I |
U |
I |
I |
– |
I |
I |
I |
U |
U |
U |
U |
U |
smalldatetime |
I |
I |
U |
I |
I |
I |
– |
I |
I |
U |
U |
U |
U |
U |
bigdatetime |
I |
I |
U |
I |
I |
I |
I |
- |
I |
U |
U |
U |
U |
U |
bigtime |
I |
I |
U |
I |
I |
I |
I |
I |
- |
U |
U |
U |
U |
U |
tinyint |
I |
I |
I |
E |
E |
U |
U |
U |
U |
– |
I |
I |
I |
I |
smallint |
I |
I |
I |
E |
E |
U |
U |
U |
U |
I |
– |
I |
I |
I |
unsigned smallint |
I |
I |
I |
E |
E |
U |
U |
U |
U |
I |
I |
– |
I |
I |
int |
I |
I |
I |
E |
E |
U |
U |
U |
U |
I |
I |
I |
– |
I |
unsigned int |
I |
I |
I |
E |
E |
U |
U |
U |
U |
I |
I |
I |
I |
– |
bigint |
I |
I |
I |
E |
E |
U |
U |
U |
U |
I |
I |
I |
I |
I |
unsigned bigint |
I |
I |
I |
E |
E |
U |
U |
U |
I |
I |
I |
I |
I |
|
decimal |
I |
I |
I |
E |
E |
U |
U |
U |
U |
I |
I |
I |
I |
I |
numeric |
I |
I |
I |
E |
E |
U |
U |
U |
U |
I |
I |
I |
I |
I |
float |
I |
I |
I |
E |
E |
U |
U |
U |
U |
I |
I |
I |
I |
I |
real |
I |
I |
I |
E |
E |
U |
U |
U |
U |
I |
I |
I |
I |
I |
money |
I |
I |
I |
I |
I |
U |
U |
U |
U |
I |
I |
I |
I |
I |
smallmoney |
I |
I |
I |
I |
I |
U |
U |
U |
U |
I |
I |
I |
I |
I |
text |
U |
U |
U |
E |
E |
U |
U |
U |
U |
U |
U |
U |
U |
U |
unitext |
E |
E |
E |
E |
E |
U |
U |
U |
U |
U |
U |
U |
U |
U |
image |
E |
E |
U |
U |
U |
U |
U |
U |
U |
U |
U |
U |
U |
U |
unichar |
I |
I |
E |
I |
I |
I |
I |
I |
I |
E |
E |
E |
E |
E |
univarchar |
I |
I |
E |
I |
I |
I |
I |
I |
I |
E |
E |
E |
E |
E |
date |
I |
I |
U |
I |
I |
I |
U |
I |
U |
U |
U |
U |
U |
U |
time |
I |
I |
U |
I |
I |
I |
U |
I |
I |
U |
U |
U |
U |
U |
From |
bigint |
unsigned bigint |
decimal |
numeric |
float |
real |
money |
smallmoney |
text |
unitext |
image |
unichar |
univarchar |
date |
time |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
binary |
I |
I |
I |
I |
I |
I |
I |
I |
U |
I |
I |
I |
I |
I |
I |
varbinary |
I |
I |
I |
I |
I |
I |
I |
I |
U |
I |
I |
I |
I |
I |
I |
bit |
I |
I |
I |
I |
I |
I |
I |
I |
U |
U |
U |
E |
E |
U |
U |
[n]char |
E |
E |
E |
E |
E |
E |
E |
E |
I |
I |
I |
I |
I |
I |
I |
[n]varchar |
E |
E |
E |
E |
E |
E |
E |
E |
I |
I |
I |
I |
I |
I |
I |
datetime |
U |
U |
U |
U |
U |
U |
U |
U |
U |
U |
U |
I |
I |
I |
I |
smalldatetime |
U |
U |
U |
U |
U |
U |
U |
U |
U |
U |
U |
I |
I |
I |
I |
bigdatetime |
U |
U |
U |
U |
U |
U |
U |
U |
U |
U |
U |
I |
I |
I |
I |
bigtime |
U |
U |
U |
U |
U |
U |
U |
U |
U |
U |
U |
I |
I |
U |
I |
tinyint |
I |
I |
I |
I |
I |
I |
I |
I |
U |
U |
U |
E |
E |
U |
U |
smallint |
I |
I |
I |
I |
I |
I |
I |
I |
U |
U |
U |
U |
E |
U |
U |
unsigned smallint |
I |
I |
I |
I |
I |
I |
I |
I |
U |
U |
U |
E |
E |
U |
U |
int |
I |
I |
I |
I |
I |
I |
I |
I |
U |
U |
U |
E |
E |
U |
U |
unsigned int |
I |
I |
I |
I |
I |
I |
I |
I |
U |
U |
U |
E |
E |
U |
U |
bigint |
– |
I |
I |
I |
I |
I |
I |
I |
U |
U |
U |
E |
E |
U |
U |
unsigned bigint |
I |
– |
I |
I |
I |
I |
I |
I |
U |
U |
U |
E |
E |
U |
U |
decimal |
I |
I |
– |
I |
I |
I |
I |
I |
U |
U |
U |
E |
E |
U |
U |
numeric |
I |
I |
I |
– |
I |
I |
I |
I |
U |
U |
U |
E |
E |
U |
U |
float |
I |
I |
I |
I |
– |
I |
I |
I |
U |
U |
U |
E |
E |
U |
U |
real |
I |
I |
I |
I |
I |
– |
I |
I |
U |
U |
U |
E |
E |
U |
U |
money |
I |
I |
I |
I |
I |
I |
– |
I |
U |
U |
U |
E |
E |
U |
U |
smallmoney |
I |
I |
I |
I |
I |
I |
I |
– |
U |
U |
U |
E |
E |
U |
U |
text |
U |
U |
U |
U |
U |
U |
U |
U |
– |
I |
U |
E |
E |
U |
U |
unitext |
U |
U |
U |
U |
U |
U |
U |
U |
I |
– |
I |
U |
U |
U |
U |
image |
U |
U |
U |
U |
U |
U |
U |
U |
U |
I |
– |
E |
E |
U |
U |
unichar |
E |
E |
E |
E |
E |
E |
E |
E |
I |
I |
I |
– |
I |
I |
I |
univarchar |
E |
E |
E |
E |
E |
E |
E |
E |
I |
I |
I |
I |
– |
I |
I |
date |
U |
U |
U |
U |
U |
U |
U |
U |
U |
U |
U |
I |
I |
– |
I |
time |
U |
U |
U |
U |
U |
U |
U |
U |
U |
U |
U |
I |
I |
I |
– |