Data Unload Utility dbdump | HP c-tree-SQL ISQL and Tools instruction

Chapter 5

Data Unload Utility: dbdump

5.1INTRODUCTION

This chapter describes the c-treeSQL database dump utility, dbdump.

dbdump writes the data in a database to a file. The format of the exported data is specified by the record description given in an input command file to dbdump.

Both dbload and dbdump commands files use DEFINE RECORD statements with similar syn- tax to specify the format of loaded or exported data records. The commands file specifies the data file, the format of data records, and the destination (or source) database columns and tables for the data.

The following figure shows the dbdump execution process.

Figure 5-1: dbdump Execution Process

dbdump

Commands file

Data file

c-treeSQL Engine

c-tree Plus

Database

5.2PREREQUISITES FOR DBDUMP

Before running dbdump, you need:

•A valid, readable commands file

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5-1

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HP c-tree-SQL ISQL and Tools manual Data Unload Utility dbdump, Prerequisites for Dbdump

Contents

For use with c-treeSQL Server Isql and Tools Reference GuidePage Table of Contents Data Load Utility dbload Iii Tutorial Source Code FairCom Corporation Documentation Overview Syntax Diagram ConventionsPurpose of this Manual Audience Isql and Tools Related Documentation Overview Introduction Isql and Tools FairCom Corporation Introductory Tutorial Quick TourInit Isql Manage DefineIsql Create Table Custmast Isql Commit Work Custmast Done Complete Introductory Tutorial CodeQuick Tour ISQLTutorial2.sql Relational Model and Indexing Tutorial Quick Tour Insert Into Values Insert IntoValues QTY Price Commit Work Complete Relational Model and Indexing Tutorial Source Code ISQLTutorial3.sql Locking Tutorial @ISQL @iSQLTutorial3.sql Isql Delete from Custmast Complete Locking Tutorial Source Code ISQLTutorial4.sql Transaction Processing Tutorial Transaction Rollback Work Complete Transaction Processing Tutorial Source Code Starting Interactive SQL Isql StatementsSyntax Arguments Statement History Support PasswordUsername Connectstring Isql Statements Formatting Output of Isql QueriesIsql Statements for Statement History Support Statement Summary Display Isql Statements for Query Formatting Summary Customername Customercity Orderid Ordervalue Example 3-1 Unformatted Query Display from Isql Example 3-2 Controlling Display Width of Character Columns Formatting Column Display with the Column Statement Example 3-3 Customizing Format of Numeric Column Displays OrdervalueCustomername Customercity Example 3-4 Specifying Column Breaks and Values with Display Numorders Customername Example 3-6 Specifying a Query Header and Footer with Title Transaction Support Help and Table Statements 1 @ Execute Syntax Isql ReferenceDescription Example Breakspec Break Syntax Examples Skip nCustomername History Clear Syntax Column Syntax ArgumentOption Break Column Compute Display Title Columnname Format formatstringHeading headingtext Character Description Date-Time Format Strings for the Column Statement Null ? Type Length Colname Not Null INTChar Orderinfo AmountSysdate Column Title FLDNEW Title Compute Variablename AVG MAX MIN SUM Count Value Define Syntax Displayvalue ColpositionCOL columnnumber @columnname Edit Syntax Exit or Quit Syntax Related StatementsExit Isql GET query.sql 10 GET Syntax Isql RUN Help Syntax Help CommandsclausesHistory Syntax Orderstate Lotlocation Following example illustrates usage of the History statement Hostcommand Host or SH or SyntaxFrom List Syntax 16 RUN Syntax Quit or Exit SyntaxQuit Isql History 18 SET Syntax Save SyntaxPagesize Linesize Pagesize numberlines Transaction Isolation Level isolationlevel Connection databasename DefaultIsql Break on Isql Select TBL from Systables TBL TBL Show Syntax Spool Syntax Is Default ?Filename on Database Connections Argument … Start SyntaxIsql Spool STK on Isql Spool OFF Not Null Varchar Null ? Type Length Colname Not Null INT Tablename Type Length Colname Null ?Date Left Center Right COL n Title SyntaxText Double Isql Clear Title Isql and Tools FairCom Corporation Introduction Data Load Utility dbload Commandsfile Dbload Command Line SyntaxPrerequisites for Dbload Options Data Load Utility dbload Data File Formats Variable Length Records Commands FileFixed Length Records Next Record Char Short Long Float Double Define Record Statement Null For Each Statement Examples Example 4-1 Sample dbload commands files Compilation Errors Record name redefinedPosition not specified for fixed length record Fatal Errors Isql and Tools FairCom Corporation Prerequisites for Dbdump Data Unload Utility dbdump Dbdump Command Line Syntax Short Long Float Double Data Unload Utility dbdump For Record Statement Define Record custrec of Fixed Length 37 AS Isql and Tools FairCom Corporation Schema Export Utility dbschema Outfile Username.procedurenameUsername.tablename Username.triggername Dbschema Schema Export Utility dbschemaImport Begin END Isql and Tools FairCom Corporation Commit Work Select * from Custmast Delete from Custmast Tutorial Source Code Integer MoneyVARCHAR6 Commit Work Delete from Custmast Tutorial Source Code Imdesc VARCHAR48 Select * from orderlist Select * from orderitems Isql and Tools FairCom Corporation Index-i Symbols Index-ii FairCom Corporation Isql Index-iii FairCom Corporation Index