LENGTH, OVERLAY, or SUBSTRING called without TYPE parameter

Rule "i18nlength" gives this warning when it finds a call to
LENGTH, OVERLAY, or SUBSTRING which did not provide the
"type" parameter: "CHARACTER," "RAW," or "COLUMN".

(the SUBSTRING function can also take a value of "FIXED")

the risc:

The source is not ready to support Unicode.

how to solve this:

Provide the "type" parameter.

How to suppress these warnings:

You can put directive {&_proparse_ prolint-nowarn(i18nlength)}
directly before the statement that contains the offending function.
See also: suppress warnings.