-2002: One output column too long 

Explanation:

The concatenation of values resulted in an excessively long alphanumeric value.

User Action:

Do without this kind of output. If it can be assumed that all values in a column are shorter than the maximum length defined for this column, the attempt can be made to reduce the result to fewer characters by applying the SUBSTR function. In any case, the columns and expressions involved in a concatenation can be output separately.