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

Page 81

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

FairCom Corporation

5-1

Image 81

Contents For use with c-treeSQL Server Isql and Tools Reference GuidePage Table of Contents Data Load Utility dbload Iii Tutorial Source CodeFairCom Corporation Documentation Overview Syntax Diagram ConventionsPurpose of this Manual AudienceIsql and Tools Related DocumentationOverview IntroductionIsql and Tools FairCom Corporation Introductory Tutorial Quick TourInit IsqlManage DefineIsql Create Table Custmast Isql Commit Work CustmastDone Complete Introductory Tutorial CodeQuick Tour ISQLTutorial2.sql Relational Model and Indexing TutorialQuick Tour Insert Into Values Insert IntoValues QTY Price Commit WorkComplete 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 TutorialTransaction Rollback Work Complete Transaction Processing Tutorial Source Code Starting Interactive SQL Isql StatementsSyntax ArgumentsStatement History Support PasswordUsername ConnectstringIsql Statements Formatting Output of Isql QueriesIsql Statements for Statement History Support Statement SummaryDisplay Isql Statements for Query Formatting SummaryCustomername Customercity Orderid Ordervalue Example 3-1 Unformatted Query Display from IsqlExample 3-2 Controlling Display Width of Character Columns Formatting Column Display with the Column StatementExample 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 Statements1 @ Execute Syntax Isql ReferenceDescription ExampleBreakspec Break SyntaxExamples Skip nCustomername History Clear SyntaxColumn Syntax ArgumentOption Break Column Compute Display TitleColumnname Format formatstringHeading headingtext Character Description Date-Time Format Strings for the Column StatementNull ? Type Length Colname Not Null INTChar Orderinfo AmountSysdate Column Title FLDNEW Title ComputeVariablename AVG MAX MIN SUM CountValue Define SyntaxDisplayvalue ColpositionCOL columnnumber @columnnameEdit Syntax Exit or Quit Syntax Related StatementsExit Isql GET query.sql 10 GET SyntaxIsql RUN Help Syntax Help CommandsclausesHistory Syntax Orderstate LotlocationFollowing example illustrates usage of the History statement Hostcommand Host or SH or SyntaxFrom List Syntax 16 RUN Syntax Quit or Exit SyntaxQuit Isql History18 SET Syntax Save SyntaxPagesize LinesizePagesize numberlines Transaction Isolation Level isolationlevel Connection databasename DefaultIsql Break on Isql Select TBL from Systables TBL TBLShow Syntax Spool Syntax Is Default ?Filename on Database ConnectionsArgument … Start SyntaxIsql Spool STK on Isql Spool OFFNot Null Varchar Null ? Type Length Colname Not Null INTTablename Type Length Colname Null ?Date Left Center Right COL n Title SyntaxText DoubleIsql Clear Title Isql and Tools FairCom Corporation Introduction Data Load Utility dbloadCommandsfile Dbload Command Line SyntaxPrerequisites for Dbload OptionsData Load Utility dbload Data File FormatsVariable Length Records Commands FileFixed Length Records Next RecordChar Short Long Float Double Define Record StatementNull For Each StatementExamples Example 4-1 Sample dbload commands filesCompilation Errors Record name redefinedPosition not specified for fixed length record Fatal Errors Isql and Tools FairCom Corporation Prerequisites for Dbdump Data Unload Utility dbdumpDbdump Command Line Syntax Short Long Float Double Data Unload Utility dbdumpFor Record Statement Define Record custrec of Fixed Length 37 AS Isql and Tools FairCom Corporation Schema Export Utility dbschema Outfile Username.procedurenameUsername.tablename Username.triggernameDbschema Schema Export Utility dbschemaImport Begin ENDIsql and Tools FairCom Corporation Commit Work Select * from Custmast Delete from Custmast Tutorial Source CodeInteger MoneyVARCHAR6 Commit Work Delete from Custmast Tutorial Source CodeImdesc VARCHAR48 Select * from orderlist Select * from orderitems Isql and Tools FairCom Corporation Index-i SymbolsIndex-ii FairCom Corporation IsqlIndex-iii FairCom Corporation Index