Primes: Difference between revisions
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The subprograms are in fact |
The primes program is purely for demonstration purposes, it would be nonsensical to generate primes and retrieve the dividers from a database. The subprograms are in fact objects, containing methods and data. |
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= Program structure = |
= Program structure = |
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The program consists of a main program and three subprograms. The main program [[primesmain.cbl]] is invoked by the command 'primesmain report'. |
The program consists of a main program and three subprograms. The main program [[primesmain.cbl]] is invoked by the command 'primesmain report'. The subprograms implementing the objects and methods are: |
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* primesui, providing the user interface as a print file |
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The sample program [[pgcobol.cbl]] makes use of the sample database: employee. When executed pgcobol puts out the file [[pgcobol.prt]].<br /> |
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* primesgen, manages the proces of primes generation and reporting, it does the prime determination too. |
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* primes |
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Only the primes program makes use of the PostgreSQL [[primes.sql]] database and so a good demonstration of three tier design. The database dump file is available for download here: [https://wiki.webhuis.nl/images/primes.sql primes.sql ]. |
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== Sample database == |
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== primesmain == |
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The [[employee database]] is a very simple database, with one table containing three lines. The pg_dump file is in the link. |
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=== The cobc GNUCobol compilation === |
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The |
The program only needs a cobol compile process, which is as follows: |
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<pre> |
<pre> |
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/usr/bin/cobc -x |
/usr/bin/cobc -x primesmain.cbl -T primesmain.out |
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</pre> |
</pre> |
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This results in the executable program file ''' |
This results in the executable program file '''primesmain''' and the compilation listing [[primesmain.out]]. |
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== primesgen == |
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The primesgen program [[primesgen.cbl]] is the program responsible for all the logic involved in the primes system. The program source code file is available for download here: [https://wiki.webhuis.nl/images/primesgen.cbl primesgen.cbl ]. The program has to be compiled as a module or a subprogram, it cannot be executed directly.<br /> |
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The program only needs a cobol compile process, which is as follows: |
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<pre> |
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/usr/bin/cobc -m primesgen.cbl -T primesgen.out |
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</pre> |
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This results in the program module file '''primesgen.so''' and the compilation listing [[primesgen.out]]. |
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== primesui == |
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The primes program [[primesui.cbl]] is the program responsible for all the user interactions. The program source code file is available for download here: [https://wiki.webhuis.nl/images/primesgen.cbl primesui.cbl ]. The program has to be compiled as a module or a subprogram, it cannot be executed directly.<br /> |
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The program only needs a cobol compile process, which is as follows: |
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<pre> |
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/usr/bin/cobc -m primesui.cbl -T primesui.out |
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</pre> |
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This results in the program module file '''primesui.so''' and the compilation listing [[primesui.out]]. |
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== primes == |
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The primes program [[primes.cbl]] is the program responsible for all the database interactions. The program source code file is available for download here: [https://wiki.webhuis.nl/images/primesgen.cbl primes.cbl ]. The program has to be compiled as a module or a subprogram, it cannot be executed directly.<br /> |
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The program needs a precompile process, which is as follows: |
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<pre> |
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/usr/bin/gixsql primes.cbl primes.cbsql -S -I . -e ".,*.cpy,*.CPY" |
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</pre> |
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This results in the cobol program file '''primes.cbsql''' [[primes.cbsql]].<br /> |
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The next steps is the cobol compilation itself: |
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<pre> |
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/usr/bin/cobc -m primes.cbsql -l:libgixsql.so -T primes.out |
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</pre> |
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This results in the program module file '''primes.so''' and the compilation listing [[primes.out]]. |
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<hr/> |
<hr/> |
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Back to: [[ |
Back to: [[Cobol and PostgreSQL]] |
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Latest revision as of 22:46, 9 December 2025
The primes program is purely for demonstration purposes, it would be nonsensical to generate primes and retrieve the dividers from a database. The subprograms are in fact objects, containing methods and data.
Program structure[edit]
The program consists of a main program and three subprograms. The main program primesmain.cbl is invoked by the command 'primesmain report'. The subprograms implementing the objects and methods are:
- primesui, providing the user interface as a print file
- primesgen, manages the proces of primes generation and reporting, it does the prime determination too.
- primes
Only the primes program makes use of the PostgreSQL primes.sql database and so a good demonstration of three tier design. The database dump file is available for download here: primes.sql .
primesmain[edit]
The program source code file is available for download here: primesmain.cbl . When executed primesmain puts out the file primes.prt.
The program only needs a cobol compile process, which is as follows:
/usr/bin/cobc -x primesmain.cbl -T primesmain.out
This results in the executable program file primesmain and the compilation listing primesmain.out.
primesgen[edit]
The primesgen program primesgen.cbl is the program responsible for all the logic involved in the primes system. The program source code file is available for download here: primesgen.cbl . The program has to be compiled as a module or a subprogram, it cannot be executed directly.
The program only needs a cobol compile process, which is as follows:
/usr/bin/cobc -m primesgen.cbl -T primesgen.out
This results in the program module file primesgen.so and the compilation listing primesgen.out.
primesui[edit]
The primes program primesui.cbl is the program responsible for all the user interactions. The program source code file is available for download here: primesui.cbl . The program has to be compiled as a module or a subprogram, it cannot be executed directly.
The program only needs a cobol compile process, which is as follows:
/usr/bin/cobc -m primesui.cbl -T primesui.out
This results in the program module file primesui.so and the compilation listing primesui.out.
primes[edit]
The primes program primes.cbl is the program responsible for all the database interactions. The program source code file is available for download here: primes.cbl . The program has to be compiled as a module or a subprogram, it cannot be executed directly.
The program needs a precompile process, which is as follows:
/usr/bin/gixsql primes.cbl primes.cbsql -S -I . -e ".,*.cpy,*.CPY"
This results in the cobol program file primes.cbsql primes.cbsql.
The next steps is the cobol compilation itself:
/usr/bin/cobc -m primes.cbsql -l:libgixsql.so -T primes.out
This results in the program module file primes.so and the compilation listing primes.out.
Back to: Cobol and PostgreSQL