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rel_exp - Comparisons of Calculation Expressions Any calculation expression can be specified as an operand of a comparison expression. The table below lists all combinations that are possible for calculation expressions in comparison expressions: One PageRelational OperatorOther Page Single operand with numeric data type or arithmetical expression =, EQ, <(><<)>>, NE, <(><<)>, LT, >, GT, <(><<)>=, LE, >=, GE Arithmetic expression Single operand with any elementary data type or string expression =, EQ, <(><<)>>, NE , <(><<)>, LT, >, GT, <(><<)>=, LE, >=, GE, CO, CN, CA, NA, CS, NS, CP, NP String expression Single operand with byte-like data type or bit expression =, EQ, <(><<)>>, NE , <(><<)>, LT, >, GT, <(><<)>=, LE, >=, GE, BYTE-CO , BYTE-CN, BYTE-CA, BYTE-NA, BYTE-CS, BYTE-NS, O, Z, M Bit expression The comparison type is determined differently depending on the type of calculation expression.
Comparisons of arithmetic expressions
Comparisons of string expressions
Comparisons of bit expressions In the case of comparison expressions using the relational operators BETWEEN and IN that are switched internally to joins of comparisons with the binary operators above, the rules of the individual comparisons apply.
Relational expressions cannot yet be compared. Instead, they can be combined using Boolean operators, where the link with the operator EQUIV corresponds to the comparison of the resulting logical values concerning equality.
A calculation expression cannot be specified as the operand of a predicate expression.
