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When numeric data is moved or stored into a COMP-5 item, truncation occurs at the binary field size rather than at the COBOL picture size limit. When a COMP-5 item is referenced, the full binary field size is used in the operation.
- Computational items
A computational item is a value used in arithmetic...
- Computational items
A computational item is a value used in arithmetic operations. It must be numeric. If a group item is described with a computational usage, the elementary items within the group have that usage. The maximum length of a computational item is 18 decimal digits, except for a PACKED-DECIMAL item.
23 lut 2017 · In IBM's Enterprise COBOL, there are four ways to define a binary field: COMP; COMP-4; BINARY; COMP-5. How does that come about? A COMPUTATIONAL field (COMP for short, and here short for "all COMPUTATIONAL fields") is "implementor defined".
14 kwi 2015 · COMP-5 does truncation to field-size, binary truncation. Compiler option TRUNC with (BIN) will treat all binary fields (COMP, COMP-4, BINARY) as "native binary" (COMP-5). Generally more instructions are generated for COMP-5 than for the others.
The example demonstrates that COMP-5 data items can contain values of magnitude up to the capacity of the native binary representation (2, 4, or 8 bytes), rather than being limited to the value implied by the number of 9 s in the PICTURE clause.
The USAGE clause explains how data is stored in memory and how the calculations are performed on that data. Different USAGE modes, such as BINARY, PACKED-DECIMAL, and DISPLAY, specify the internal representation of the data. The USAGE mode can impact storage requirements and the efficiency of arithmetic operations.
12 lip 2007 · When numeric data is moved or stored into a COMP-5 item, truncation occurs at the binary field size rather than at the COBOL picture size limit. When a COMP-5 item is referenced, the full binary field size is used in the operation.
