[VNET] using length in where clause

[SoftIl]

Hi all,
is it possible to use the length function in an where clause like this:

SELECT * FROM myTable WHERE length('myFieldName') < 15

If I try this, I get an error "wrong expression".

In case of not, is there some other possibility to check the length of an
field in a where clause?

Thanks for your help
Carsten