## -8006: Data types must be compatible

### Explanation:

...

1. A function was applied to a non-permitted argument.

2. A two-digit operation was applied to non-comparable values.

3. A predicate contains non-comparable data types.

Each data type can be compared to itself. Columns of data type CHAR with the different code attributes ASCII and UNICODE can be compared to each other; they are implicitly adapted. The columns of code attribute ASCII can be compared to date, time, and timestamp specifications.

All numbers can be compared to each other.

### User Action:

Use a QUERY statement issued on the system table DOMAIN.COLUMNS to find out the definition of the specified columns. It may be attempted to achieve comparability by applying a conversion function.