Sybase Adaptive Server IQ 12.4.2 Administration And Performance Manual page 226

Converting data on insertion
206
The first table shows implicit (I), explicit (E), and unsupported (U) conversions
when there is no
WHERE
clause is based on a comparison operation (=, > or <).
Figure 5-2: IQ conversions for comparison operations
clause in the statement, or when the
SELECT WHERE