Unary Plus: +
Syntax
+ op
Input parameters
op |
the operand |
Examples of valid syntaxes
+ DS_1
+ 3
Semantics for scalar operations
The operator + returns the operand unchanged. For example:
+3 gives 3+(-5) gives -5Input parameters type
op:
dataset { measure<number> _+ }
| component<number>
| number
Result type
result:
dataset { measure<number> _+ }
| component<number>
| number
Additional Constraints
None.
Behaviour
The operator has the behaviour of the “Operators applicable on one Scalar Value or Data Set or Data Set Component” (see the section “Typical behaviours of the ML Operators”). According to the general rules about data types, the operator can be applied also on sub-types of number, that is the type integer. If the type of the operand is integer then the result has type integer. If the type of the operand is number then the result has type number.
Examples
Given the operand Data Set DS_1:
Input DS_1 (see structure)
Id_1 |
Id_2 |
Me_1 |
Me_2 |
|---|---|---|---|
10 |
A |
1.0 |
5 |
10 |
B |
2.3 |
10 |
11 |
A |
3.2 |
12 |
Example 1
DS_r := + DS_1;
results in (see structure):
Id_1 |
Id_2 |
Me_1 |
Me_2 |
|---|---|---|---|
10 |
A |
1.0 |
5 |
10 |
B |
2.3 |
10 |
11 |
A |
3.2 |
12 |
Example 2
DS_r := DS_1 [ calc Me_3 := + Me_1 ];
results in (see structure):
Id_1 |
Id_2 |
Me_1 |
Me_2 |
Me_3 |
|---|---|---|---|---|
10 |
A |
1.0 |
5 |
1.0 |
10 |
B |
2.3 |
10 |
2.3 |
11 |
A |
3.2 |
12 |
3.2 |