Programming Guide - Actian

handling errors in inquire_4GL statement •299sending user events • 303statement summary • 299Enablinguser modifications to table field data • 241Encapsulation • 128Entry fieldscreating at runtime • 373error break conditions • 452Debugger • 452setting • 453Error handlersSee Data entry error handlers •309Error messagescustomizing • 312ErrorNumber attribute • 197Errors3GL • 151BitMapObjects • 204called 3GL procedures • 151DataStreams • 199DeleteFromDB method • 200ErrorStatus attribute • 201handling database errors • 197inquire_sql statement • 201InsertIntoDB method • 200retrieving error text • 201StringObjects • 204types • 452UpdateInDB method • 200Errors Break Conditions tab page • 453Errors, database queries3GL procedures • 151BitMapObject methods • 200, 204DataStream methods • 199DBMSError attribute • 197error handler procedure • 202error handler procedure example • 202ErrorNumber attribute • 197inquire_sql statement • 201QueryObject methods • 199retrieving error text • 201StringObject methods • 200, 204ErrorStatus attributesetting • 201Event blockBlocksFrames attribute • 106interrupting • 117, 328processing • 336switching sessions • 195Event blocksfield and menu item scripts • 71using in frame scripts • 69event break conditions • 450setting • 451Event Break Conditions dialog • 451Event queueapplication • 318BlocksFrames attribute • 106examining • 321frame • 319manipulating • 321PurgeUserEvent method • 347SendUserEvent method • 339user events • 336Event system class • 146, 338, 345EventsBlocksFrames attribute • 106chains • 323child • 323database events and chains • 323database events and multiple sessions •358field events • 323frame • 321menu • 326obtaining information about • 330processing • 319resume statement and chains • 328user events and chains • 323viewing event queue • 462Events Break Conditions tab page • 451Exec 4GL sample • 308Exec SQL sample • 308Execute Immediate statement • 155Exit eventSendUserEvent method • 341Exit statementleaving applications • 99transactions • 188Exp function • 53Exponential function • 53Expressions • 36and non-printable characters • 37and procedures • 86arithmetic • 41assigning values • 477boolean • 43508 Programming Guide