HP c-tree-SQL ISQL and Tools manual Data Load Utility dbload, Introduction

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Chapter 4

Data Load Utility: dbload

4.1INTRODUCTION

This chapter describes the c-treeSQL database load utility, dbload. This utility loads records from an input data file into tables of a database. The format of the data file is specified by a record description given in an input commands file to dbload.

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 dbload utility allows loading of variable- or fixed-length records, and lets the load opera- tion specify the set of fields and records to be stored from an input file. Data files can use mul- tiple-character record delimiters. dbload also allows control of other characteristics, such as error handling and logging, in its command line. dbload generates a badfile that contains records from the input file that failed to load in the database.

The following figure shows the dbload execution process.

FairCom Corporation

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Contents For use with c-treeSQL Server Isql and Tools Reference GuidePage Table of Contents Data Load Utility dbload Iii Tutorial Source CodeFairCom Corporation Audience Syntax Diagram ConventionsDocumentation Overview Purpose of this ManualIsql and Tools Related DocumentationOverview IntroductionIsql and Tools FairCom Corporation Isql Quick TourIntroductory Tutorial InitIsql Commit Work Custmast DefineManage Isql Create Table CustmastQuick Tour DoneComplete Introductory Tutorial Code ISQLTutorial2.sql Relational Model and Indexing TutorialQuick Tour Values Insert IntoValues Insert Into 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 Arguments Isql StatementsStarting Interactive SQL SyntaxConnectstring PasswordStatement History Support UsernameStatement Summary Formatting Output of Isql QueriesIsql Statements Isql Statements for Statement History SupportDisplay 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 StatementCustomername Customercity Example 3-3 Customizing Format of Numeric Column DisplaysOrdervalue 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 StatementsExample Isql Reference1 @ Execute Syntax DescriptionBreakspec Break SyntaxCustomername ExamplesSkip n History Clear SyntaxBreak Column Compute Display Title ArgumentColumn Syntax OptionHeading headingtext ColumnnameFormat formatstring Character Description Date-Time Format Strings for the Column StatementChar Null ? Type Length ColnameNot Null INT Sysdate OrderinfoAmount Compute FLDColumn Title NEW TitleVariablename AVG MAX MIN SUM CountValue Define Syntax@columnname ColpositionDisplayvalue COL columnnumberEdit Syntax Exit Exit or Quit SyntaxRelated Statements Isql GET query.sql 10 GET SyntaxIsql RUN Orderstate Lotlocation Help CommandsclausesHelp Syntax History SyntaxFollowing example illustrates usage of the History statement From HostcommandHost or SH or Syntax List Syntax Isql History Quit or Exit Syntax16 RUN Syntax QuitLinesize Save Syntax18 SET Syntax PagesizePagesize numberlines TBL Connection databasename DefaultTransaction Isolation Level isolationlevel Isql Break on Isql Select TBL from Systables TBLShow Syntax Database Connections Is Default ?Spool Syntax Filename onIsql Spool OFF Start SyntaxArgument … Isql Spool STK onNot Null Varchar Null ? Type Length Colname Not Null INTDate TablenameType Length Colname Null ? Double Title SyntaxLeft Center Right COL n TextIsql Clear Title Isql and Tools FairCom Corporation Introduction Data Load Utility dbloadOptions Dbload Command Line SyntaxCommandsfile Prerequisites for DbloadData Load Utility dbload Data File FormatsNext Record Commands FileVariable Length Records Fixed Length RecordsChar Short Long Float Double Define Record StatementNull For Each StatementExamples Example 4-1 Sample dbload commands filesPosition not specified for fixed length record Compilation ErrorsRecord name redefined 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 Username.triggername Username.procedurenameOutfile Username.tablenameEND Schema Export Utility dbschemaDbschema Import BeginIsql and Tools FairCom Corporation Commit Work Select * from Custmast Delete from Custmast Tutorial Source CodeVARCHAR6 IntegerMoney 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