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ABENLOGEXP_RULES_EXPRESSIONS - LOGEXP RULES EXPRESSIONS

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- Comparison Type of Calculation Expressions

Any calculation expression can be specified as an operand of a comparison expression.

The table below summarizes the combinations in which calculation expressions can be listed in comparison expressions:

One side	Comparison operator	Other side
Single operand with numeric data type or arithmetic expression	=, EQ, <>, NE, , LT, >, GT, =, LE, >=, GE	Arithmetical 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.

• Comparison type of arithmetic expressions

• Comparison type of string expressions

• Comparison type of bit expressions

In comparison expressions with the comparison operators BETWEEN and IN, which are converted internally to combinations of comparisons with the binary operators above, the rules of the respective comparisons apply.

Notes

• Relational expression cannot yet be compared. Instead, they can be combined using Boolean operators, where the combination with the operator EQUIV corresponds to the comparison of the resulting truth values for equality.

• A calculation expression cannot be specified as the operand of a predicate expression.

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