There are also problems with the CAT functions in PROC SQL. I don't remember the exact details, but I had something like this:Good advice. There's no reason to avoid the CAT functions, but they do need to be used with the same degree of consideration as other string functions and you need to pay attention to lengths.
select catx(', ', a, b, c, d, e, f, g, h, i)
If the result string exceeded a certain size, it was truncated.
In this particular case I went back to the concatenation operator.
In general, functions that return a string value can look at their destination to decide how long the result can be. In this case, there is no predefined destination length, and the function arbitrarily chose a length that was too small.