Class tsequencelink

Unit

msesqldb

Declaration

type tsequencelink = class(tmsecomponent, idbeditinfo)

Description

This item has no description. Showing description inherited from tmsecomponent.

Extends the FPC tcomponent with object linking facilities and the like; base of every MSEgui component. This unit, mseclasses, must be added to uses after classes in code that also uses a third-party unit expecting the plain FPC tcomponent (e.g. TPSScript.Create(TComponent)), since MSEgui forks the FPC classes unit.

Hierarchy

• TObject
• tpersistent
• tcomponent
• tmsecomponent
• tsequencelink

Overview

Methods

Protected	procedure notification(acomponent: tcomponent; operation: toperation); override;
Public	constructor create(aowner: tcomponent); override;
Public	destructor destroy; override;
Public	function assql: string;
Public	function currvalue: largeint;

Properties

Public	property aslargeint: largeint read getaslargeint write setaslargeint;
Public	property asinteger: integer read getasinteger write setasinteger;
Public	property lastvalue: largeint read flastvalue;
Published	property database: tsqlconnection read fdatabase write setdatabase;
Published	property datasource: tdatasource read getdatasource write setdatasource;
Published	property datafield: string read getdatafield write setdatafield;
Published	property sequencename: string read fsequencename write setsequencename;
Published	property onupdatevalue: updateint64eventty read fonupdatevalue write fonupdatevalue;

Description

Methods

Protected	procedure notification(acomponent: tcomponent; operation: toperation); override;
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Public	constructor create(aowner: tcomponent); override;
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Public	destructor destroy; override;
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Public	function assql: string;
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Public	function currvalue: largeint;
This item has no description.

Properties

Public	property aslargeint: largeint read getaslargeint write setaslargeint;
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Public	property asinteger: integer read getasinteger write setasinteger;
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Public	property lastvalue: largeint read flastvalue;
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Published	property database: tsqlconnection read fdatabase write setdatabase;
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Published	property datasource: tdatasource read getdatasource write setdatasource;
Leave datasource and datafield empty to only fetch the sequence value on demand (e.g. read it from asinteger/ aslargeint in the dataset's onbeforepost) instead of consuming a new sequence value on every insert attempt — useful when an insert can be aborted, since a bound field would otherwise waste a value each time.

Published	property datafield: string read getdatafield write setdatafield;
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Published	property sequencename: string read fsequencename write setsequencename;
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Published	property onupdatevalue: updateint64eventty read fonupdatevalue write fonupdatevalue;
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