The following reasons are possible:
- The total length of the output columns exceeds 8084.
- The total length of the output columns, together with the columns specified in the <ORDER clause> or <GROUP clause>, exceeds 8084.
- The total length of the output columns, together with the correlated columns and columns of <PREDICATE>s which contain a <SUBQUERY>, exceeds 4048 in an SQL statement with correlated subqueries.