JBase. May i know is there any beginner tutorial or something like “getting started ” for the beginners, before moving on to the complex tasks, such as advanced. jBC is a programming language that is used in jBASE post-relational (multi-value ) DBMS. Syntax is Basic-like; compilation process firstly converts the source. jBASE is a multivalue database system. jBASE was released in by a small company in the UK, then named. James Anthony Consultants,(JAC), later to.
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INTRODUCTION TO jBASE
Enter jchmod command with the option to add backup of file using jbackup. The following guide is an instructional walkthrough of fundamental system administration tasks and how to begin programming in the jBASE database. Jbaes you are unable to find the information you are looking for, jBASE Support will be glad to assist in resolving your technical problems. If Account Name is not specified, the last element in Account Directory is used as the account name.
Specify the directories you want to backup and then pipe the directory into the jbackup command. In normal operationthe default hash method for the file should be used, jbsae the -M option allows experimentation with different hash methods, which may have a small benefit dependent upon the nature of the record key, ‘n’ specifies the hash method, 1,2,3,4 or 5.
Create both data and dictionary file: Only valid strings can be saved in an Environment Variables, special OS characters must be escaped or enclosed in quotes or single quotes. From the standard shell we will enter the following syntax: Create a backup for our account 1.
jBASE — INTRODUCTION TO jBASE
Add the following data into the corresponding rows. So when cataloging subroutines, it is much faster to work from an active select list. Windows does not have a ‘find’ command so jBASE provides a ‘jfind’ command; the syntax is essentially the same, so you would have something like this: The account’s location will be located and piped to jbackup.
Enter jrf command with options verbose display and to allow downsize of file. Allow the hash method to be overridden when resizing the file. REC1 1 Records Listed 5. Beyond this convenient feature, jSHELL also offers many significant advantages over traditional shells and is easier to use. Displays suggested resize parameters. In this case, the record-list is ignored. Check the result with the jstat command. Specifies that a jsh process should be spawned to execute command. The value is set to NO by default.
The jED editor has been designed for ease of use, easy personal configuration and is especially suited to the editing of jBC programs. The default action is to exit the shell once the processing of the input file has been completed. In Linux, env will set the Environment Variable for the extent of a command. Not finding what you’re looking for?
Refer to your System Administration Guide for your specific platform. The same is true when decataloging subroutines. Restore the whole account note the use of the -v, -O and -f options: If the jsh command is issued without arguments, a jsh process is spawned andthis process becomes your command shell.
Thisexample is restoring record ‘REC1’ in the F. Where are the subroutines? Edit the program using JED and add the data below.
The name can include absolute or relative path information. Restore the whole account to another location note the use of the -c and -d options: These object files are no longer required once all the shared libraries have been debugged and ready to release. Please make sure this is your intention. Some Operating Tutprial require large file support to be enabled when the file system is created. See file statistics 1.
From the standard shell we will enter the jrestore command to initiate the backup using the following syntax:. Enter jstat command with verbose display and filename. Change file properties 1.
Only the restore specification will be set, so that the file is resized automatically when the file is restored. The TRANS parameters set or clear the flag which allows the file to be jbaase or excluded from within any transaction boundaries defined by an executing program.
Creating your demo account for this walkthrough 1. Restore a single record from a hashed file most commonly requested scenario. BP Native file C: Using temp file s: The value is set to YES by default.
In same manner, quoted strings such as “quoted string” are passed directly to the command with quotes intact. Subroutine object files are collated into evenly sized shared libraries and then by default placed in the home directory “lib” directory.
The source is compiled using the jBC command.