String length: length

Syntax

length ( op )

Input parameters

op	the operand

Examples of valid syntaxes

length("Hello, World!")
length(DS_1)

Semantics for scalar operations

Returns the length of a string. For example:

length("Hello, World!") gives 13

length("") gives 0

Input parameters type

op

dataset { measure<string> _+ }
| component<string>
| string

Result type

result

dataset { measure<integer[value >= 0]> int_var }
| component<integer[value >= 0]>
| integer[value >= 0]

Additional Constraints

For operations at Data Set level, the input Data Set must have exactly one string type Measure.

Behaviour

The operator has the behaviour of the “Operators changing the data type” (see the section “Typical behaviours of the ML Operators”). If op is a Data Set then length returns a dataset with a single measure int_var of type integer.