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pFIBDataSet.pas
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pFIBDataSet.pas
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{***************************************************************}
{ FIBPlus - component library for direct access to Firebird and }
{ InterBase databases }
{ }
{ FIBPlus is based in part on the product }
{ Free IB Components, written by Gregory H. Deatz for }
{ Hoagland, Longo, Moran, Dunst & Doukas Company. }
{ mailto:gdeatz@hlmdd.com }
{ }
{ Copyright (c) 1998-2007 Devrace Ltd. }
{ Written by Serge Buzadzhy (buzz@devrace.com) }
{ }
{ ------------------------------------------------------------- }
{ FIBPlus home page: http://www.fibplus.com/ }
{ FIBPlus support : http://www.devrace.com/support/ }
{ ------------------------------------------------------------- }
{ }
{ Please see the file License.txt for full license information }
{***************************************************************}
unit pFIBDataSet;
interface
{$I FIBPlus.inc}
uses
SysUtils, Classes, StdFuncs, DB, Ibase, IB_Intf, IB_Externals,
FIBPlatforms, Fib, FIBMiscellaneous, pFIBDatabase, FIBDataBase, FIBDataSet, FIBQuery,
pFIBLists, pFIBQuery, DSContainer, pFIBProps, IB_ErrorCodes, pFIBInterfaces,
pFIBDataInfo {, FIBSaveDataSetToXml }{$IFDEF D6+},FMTBcd, Variants {$ENDIF} ;
type
TLockStatus = (lsSuccess, lsDeadLock, lsNotExist, lsMultiply, lsUnknownError);
TLockErrorEvent =
procedure(DataSet: TDataSet; LockError: TLockStatus;
var ErrorMessage: string; var Action: TDataAction) of object;
TCachRefreshKind = (frkEdit, frkInsert);
TOnGetSQLTextProc = procedure(DataSet: TFIBDataSet; var SQLText: string) of object;
(* For generate SQL text*)
TIncludeFieldsToSQL=(ifsAllFields,ifsNoBlob,ifsOnlyBlob);
(* ********************)
TpFIBDataSet = class(TFIBDataSet)
private
vQryRecordCount: TFIBQuery;
vLockQry: TFIBQuery;
FDataSet_ID: integer;
FLoadedDataSet_ID: integer;
FDefaultFormats: TFormatFields;
FOnLockError: TLockErrorEvent;
vUserOnPostError: TDataSetErrorEvent;
vUserOnDeleteError: TDataSetErrorEvent;
FOnLockSQLText :TOnGetSQLTextProc;
// lists of UpdateObjects
vUpdates: TList;
vDeletes: TList;
vInserts: TList;
FReceiveEvents: TStrings;
{$IFDEF USE_DEPRECATE_METHODS2}
FOnUserEvent: TUserEvent;
{$ENDIF }
FHaveUncommitedChanges: boolean;
FHaveRollbackedChanges: boolean;
FDescription: string;
FOnAskRecordCount: TOnGetSQLTextProc;
FOnApplyDefaultValue:TOnApplyDefaultValue;
FSQLTextChanges: integer;
FBlobsUpdate: TpFIBUpdateObject;
FOnApplyFieldRepository:TOnApplyFieldRepository;
FContainer: TDataSetsContainer;
FDefaultsInited:boolean;
FParamsForFields: array of TFIBXSQLVAR;
FGeneratorBeUsed:boolean;
FMidasCommandText:Widestring;
FMidasOutParams: TParams;
procedure SetContainer(Value: TDataSetsContainer);
{$IFDEF USE_DEPRECATE_METHODS2}
procedure SetReceiveEvents(Value: TStrings);
{$ENDIF}
//Property access procedures
function GetSelectSQL: TStrings;
procedure SetSelectSQL(Value: TStrings);
// UpdateObjects support
function ListForUO(KindUpdate: TUpdateKind): TList;
procedure SynchroOrdersUO(List: TList);
//
procedure SetDataSet_ID(Value: Integer);
function GetFieldForTable(const Relation: string): TField;
function WillGenerateSQLs: boolean;
function GetFIBVersion: string;
procedure SetFIBVersion(const vs: string);
protected
procedure Notification(AComponent: TComponent; Operation: TOperation); override;
function GetVisibleRecno: Integer;
procedure SetVisibleRecno(Value: Integer);
function GetRecNo: Integer; override;
procedure SetRecNo(Value: Integer); override;
procedure InternalPost; override;
procedure InternalOpen ;override;
procedure SetPrepareOptions(Value: TpPrepareOptions); override;
procedure DoOnPostError(DataSet: TDataSet; E: DB.EDatabaseError; var Action:
TDataAction); override;
procedure DoOnDeleteError(DataSet: TDataSet; E: DB.EDatabaseError; var
Action: TDataAction);
function CompareFieldValues(Field:TField;const S1,S2:variant):integer; override;
// IProviderSupport
protected
// FParams: TParams;
{$IFNDEF TWideDataSet}
function PSGetTableName: string; override;
function PSGetKeyFields: string; override;
function PSGetQuoteChar: string; override;
procedure PSSetCommandText(const CommandText: string); override;
{$ELSE}
procedure PSSetCommandText(const CommandText: Widestring); override;
function PSGetTableNameW: WideString; override;
function PSGetKeyFieldsW: WideString; override;
function PSGetQuoteCharW: Widestring; override;
function PSGetCommandTextW: WideString;override;
{$ENDIF}
function PSGetUpdateException(E: Exception; Prev: EUpdateError):
EUpdateError; override;
function PSInTransaction: Boolean; override;
function PSIsSQLBased: Boolean; override;
function PSIsSQLSupported: Boolean; override;
procedure PSStartTransaction; override;
procedure PSEndTransaction(Commit: Boolean); override;
procedure PSReset; override;
function PSUpdateRecord(UpdateKind: TUpdateKind; Delta: TDataSet): Boolean;
override;
function PSExecuteStatement(const ASQL: {$IFNDEF TWideDataSet} string{$ELSE} Widestring{$ENDIF}; AParams: TParams;
ResultSet: Pointer = nil): Integer; override;
procedure PSExecute; override;
function PSGetParams: TParams; override;
procedure PSSetParams(AParams: TParams); override;
function IsVisible(Buffer: TRecordBuffer): Boolean; override;
procedure InternalPostRecord(Qry: TFIBQuery; Buff: Pointer); override;
procedure InternalDeleteRecord(Qry: TFIBQuery; Buff: Pointer); override;
procedure AddedFilterRecord(DataSet: TDataSet; var Accept: Boolean);
virtual;
procedure InternalDoBeforeOpen; override;
procedure DoBeforeOpen; override;
procedure DoAfterOpen; override;
procedure DoAfterClose; override;
procedure DoBeforeInsert; override;
procedure DoAfterInsert; override;
procedure DoBeforeEdit; override;
procedure DoBeforePost; override;
procedure DoAfterPost; override;
procedure DoBeforeCancel; override;
procedure DoAfterCancel; override;
procedure DoBeforeDelete; override;
procedure DoOnNewRecord; override;
procedure DoAfterDelete; override;
procedure DoAfterEdit; override;
procedure DoAfterScroll; override;
procedure DoBeforeClose; override;
procedure DoBeforeScroll; override;
procedure DoOnCalcFields; override;
procedure DoBeforeRefresh; override;
procedure DoAfterRefresh; override;
procedure DoOnApplyDefaultValue(Field:TField; var Applied:boolean); dynamic;
function GetRecordCount: Integer; override;
procedure UpdateFieldsProps; virtual;
procedure DoAfterEndUpdateTransaction(EndingTR:TFIBTransaction;Action: TTransactionAction;
Force: Boolean); override;
procedure ClearModifFlags(Kind: byte; NeedRefreshFields:boolean=True);
procedure CloseProtect;
function RaiseLockError(LockError: TLockStatus; ExceptMessage: string):
TDataAction;
private
//
FBlockContextCount:integer;
FBlockSize:Integer;
FExecBlockStatement:TStrings;
function AddStatementToExecuteBlock(SK:TpSQLKind):boolean;
//=Succes add to execblock
protected
procedure LoadRepositoryInfo; override;
procedure SQLChanging(Sender: TObject); override;
public
constructor Create(AOwner: TComponent); override;
destructor Destroy; override;
function RecordCountFromSrv: integer; dynamic;
function VisibleRecordCount: Integer;
function VisibleRecnoToRecno(VisRN: integer): Integer;
procedure ParseParamToFieldsLinks(Dest: TStrings); override;
procedure Prepare; override;
function CanEdit: Boolean; override;
function CanInsert: Boolean; override;
function CanDelete: Boolean; override;
function IsSequenced: Boolean; override; // Scroll bar
function ExistActiveUO(KindUpdate: TUpdateKind): boolean;
// Exist active Update objects
function AddUpdateObject(Value: TpFIBUpdateObject): integer;
procedure RemoveUpdateObject(Value: TpFIBUpdateObject);
function ParamByName(const ParamName: string): TFIBXSQLVAR;
function FindParam(const ParamName: string): TFIBXSQLVAR;
function RecordStatus(RecNumber: integer): TUpdateStatus;
procedure CloneRecord(SrcRecord: integer; IgnoreFields: array of const);
procedure CloneCurRecord(IgnoreFields: array of const);
// Cached Routine
procedure CommitUpdToCach; // Clear CU buffers
procedure ApplyUpdToBase(DontChangeCacheFlags:boolean=True); // Send Updates to Base
procedure ApplyUpdates;
// SaveLoad Buffer functions
procedure SaveToStream(Stream: TStream; SeekBegin: boolean; AddInfo:Ansistring='');
procedure LoadFromStream(Stream: TStream; SeekBegin: boolean ); overload;
procedure LoadFromStream(Stream: TStream; SeekBegin: boolean; var AddInfo:Ansistring);overload;
// procedure SaveToXmlFile(const FileName:string; Format:TXmlDataSetFormat); overload;
// procedure SaveToXmlFile(const FileName:string; const FormatName:string); overload;
procedure SaveToFile(const FileName: string; AddInfo:Ansistring='');
procedure LoadFromFile(const FileName: string); overload;
procedure LoadFromFile(const FileName: string;var AddInfo:Ansistring); overload;
// End SaveLoad
function LockRecord(RaiseErr: boolean= True): TLockStatus;
function FieldByFieldNo(FieldNo: Integer): TField;
function ParamNameCount(const aParamName: string): integer;
function ParamCount: integer;
procedure ExecUpdateObjects(KindUpdate: TUpdateKind; Buff: TRecordBuffer;
aExecuteOrder: TFIBOrderExecUO);
{$IFDEF USE_DEPRECATE_METHODS2}
procedure DoUserEvent(Sender: TObject; const UDE: string; var Info: string);
dynamic; deprecated;
{$ENDIF}
procedure OpenWP(const ParamValues: array of Variant); overload;
procedure OpenWP(const ParamNames : string;const ParamValues: array of Variant); overload;
procedure OpenWPS(const ParamSources: array of ISQLObject);
procedure ReOpenWP(const ParamValues: array of Variant); overload;
procedure ReOpenWP(const ParamNames : string;const ParamValues: array of Variant); overload;
procedure ReOpenWPS(const ParamSources: array of ISQLObject);
procedure BatchRecordToQuery(ToQuery:TFIBQuery);
procedure BatchAllRecordsToQuery(ToQuery:TFIBQuery);
procedure AutoGenerateSQLText(ForState: TDataSetState);
function GenerateSQLText
(const TableName, KeyFieldNames: string; SK: TpSQLKind; IncludeFields:TIncludeFieldsToSQL=ifsAllFields;
ReturningFields: TSetReturningFields=[]
): string;
function GenerateSQLTextNoParams
(const TableName, KeyFieldNames: string; SK: TpSQLKind): string;
function GenerateSQLTextWA
(const TableName: string; SK: TpSQLKind; IncludeFields:TIncludeFieldsToSQL=ifsAllFields): string;
// Where All
procedure GenerateUpdateBlobsSQL;
procedure GenerateSQLs;
function CanGenerateSQLs: boolean;
//AutoUpdate operations
function KeyField: TField;
function SqlTextGenID: string;
procedure IncGenerator; virtual;
function AllKeyFields(const TableName: string): string;
procedure CacheModify(
aFields: array of integer; Values: array of Variant; KindModify: byte
);
procedure CacheEdit(aFields: array of integer; Values: array of Variant);
procedure CacheAppend(aFields: array of integer; Values: array of Variant);
overload;
procedure CacheAppend(Value: Variant; DoRefresh: boolean = False); overload;
procedure CacheInsert(aFields: array of integer; Values: array of Variant);
overload;
procedure CacheInsert(Value: Variant; DoRefresh: boolean = False); overload;
procedure CacheRefresh(FromDataSet: TDataSet; Kind: TCachRefreshKind
; FieldMap: TStrings
);
procedure CacheRefreshByArrMap(
FromDataSet: TDataSet; Kind: TCachRefreshKind;
const SourceFields, DestFields: array of string
);
procedure RefreshFromQuery(RefreshQuery:TFIBQuery;const KeyFields:string; IsDeletedRecords:boolean=False;
DoAdditionalRefreshRec:boolean=False
);
procedure RefreshFromDataSet(RefreshDataSet:TDataSet;const KeyFields:string;
IsDeletedRecords:boolean=False;
DoAdditionalRefreshRec:boolean=False
);
function RecordFieldAsFloat(Field: TField; RecNumber: integer;
IsVisibleRecordNum: boolean = True): Double;
public
property HasUncommitedChanges: boolean read FHaveUncommitedChanges;
property HaveRollbackedChanges: boolean read FHaveRollbackedChanges;
property AllRecordCount: integer read FAllRecordCount;
property VisibleRecno: integer read GetVisibleRecno write SetVisibleRecno;
published
//Added properties
property Filtered;
property OnFilterRecord;
property DeleteSQL: TStrings read GetDeleteSQL write SetDeleteSQL;
property UpdateSQL: TStrings read GetUpdateSQL write SetUpdateSQL;
property InsertSQL: TStrings read GetInsertSQL write SetInsertSQL;
property RefreshSQL: TStrings read GetRefreshSQL write SetRefreshSQL;
property SelectSQL: TStrings read GetSelectSQL write SetSelectSQL;
property DefaultFormats: TFormatFields read FDefaultFormats write
FDefaultFormats;
property OnPostError: TDataSetErrorEvent read vUserOnPostError write
vUserOnPostError;
property OnDeleteError: TDataSetErrorEvent read vUserOnDeleteError write
vUserOnDeleteError;
property OnLockError: TLockErrorEvent read FOnLockError write FOnLockError;
{$IFDEF USE_DEPRECATE_METHODS2}
property OnUserEvent: TUserEvent read FOnUserEvent write FOnUserEvent;
property ReceiveEvents: TStrings read FReceiveEvents write SetReceiveEvents;
{$ENDIF}
property DataSet_ID: integer read FDataSet_ID write SetDataSet_ID default 0;
property Description: string read FDescription write FDescription;
property Container:TDataSetsContainer read FContainer write SetContainer;
property OnAskRecordCount: TOnGetSQLTextProc read FOnAskRecordCount write
FOnAskRecordCount;
property About: string read GetFIBVersion write SetFIBVersion stored False;
property OnApplyDefaultValue:TOnApplyDefaultValue read FOnApplyDefaultValue write FOnApplyDefaultValue;
property OnApplyFieldRepository:TOnApplyFieldRepository read FOnApplyFieldRepository write FOnApplyFieldRepository;
property OnLockSQLText :TOnGetSQLTextProc read FOnLockSQLText write FOnLockSQLText;
end;
function FieldInArray(Field: TField; Arr: array of const): boolean;
implementation
uses
{$IFNDEF NO_MONITOR}
FIBSQLMonitor,
{$ENDIF}
{$IFDEF D_XE3}
System.Types, // for inline funcs
{$ENDIF}
StrUtil, DBConsts, SqlTxtRtns, FIBConsts,
pFIBFieldsDescr, pFIBCacheQueries,FIBCacheManage;
const
SQLKindNames: array[TpSQLKind] of string = (
'UpdateSQL',
'InsertSQL',
'DeleteSQL',
'RefreshSQL',
'UpdateOrInsert'
);
StreamSignature:AnsiString = 'FIB$DATASET';
function UseFormat(const sFormat: string; Scale: integer): string;
var
L, pD: integer;
begin
L := Length(sFormat);
if (L = 0) then
Result := sFormat
else
if (sFormat[L] = '.') then
Result := sFormat + MakeStr('0', Scale)
else
begin
pD := PosCh('.', sFormat);
if pD = 0 then
Result := sFormat
else
if (pD = L - 1) then
Result := FastCopy(sFormat, 1, Pred(pd)) + '.' + MakeStr(sFormat[L], Scale)
else
Result := sFormat
end;
end;
//
constructor TpFIBDataSet.Create(AOwner: TComponent);
begin
inherited Create(AOwner);
FDefaultFormats := TFormatFields.Create(Self);
inherited OnPostError := DoOnPostError;
inherited OnDeleteError := DoOnDeleteError;
vUpdates := TList.Create;
vDeletes := TList.Create;
vInserts := TList.Create;
FReceiveEvents := TStringList.Create;
vQryRecordCount := TFIBQuery.Create(Self);
vQryRecordCount.ParamCheck := True;
vLockQry := TFIBQuery.Create(Self);
vLockQry.ParamCheck := True;
end;
destructor TpFIBDataSet.Destroy;
begin
FDefaultFormats.Free;
vUpdates.Free;
vDeletes.Free;
vInserts.Free;
FReceiveEvents.Free;
if Assigned(FExecBlockStatement) then
FExecBlockStatement.Free;
if Assigned(FParams) then
FParams.Free;
if FGeneratorBeUsed then
FreeHandleCachedQuery(Database,
'select gen_id(' + FAutoUpdateOptions.GeneratorName + ', '
+ IntToStr(FAutoUpdateOptions.GeneratorStep) +') from RDB$DATABASE'
);
inherited Destroy;
end;
function TpFIBDataSet.GetVisibleRecno: Integer;
var
R: integer;
begin
R := inherited GetRecno;
FFilteredCacheInfo.NonVisibleRecords.Find(R, Result);
Result := R - Result;
end;
procedure TpFIBDataSet.SetVisibleRecno(Value: Integer);
var
R, R1: integer;
Diff, i: integer;
begin
if (FFilteredCacheInfo.NonVisibleRecords.Count = 0) or
(FFilteredCacheInfo.NonVisibleRecords[0] > Value)
then
inherited SetRecno(Value)
else
begin
R := FFilteredCacheInfo.NonVisibleRecords[0];
R1 := R - 1;
for i := 1 to Pred(FFilteredCacheInfo.NonVisibleRecords.Count) do
begin
Diff := FFilteredCacheInfo.NonVisibleRecords[i] - R - 1;
if Diff <> 0 then
begin
if R1 + Diff > Value then
Diff := Value - R1;
Inc(R1, Diff);
if R1 = Value then
begin
R := FFilteredCacheInfo.NonVisibleRecords[i - 1] + Diff;
Break
end
end;
R := FFilteredCacheInfo.NonVisibleRecords[i];
end;
if R1 < Value then
begin
R := FFilteredCacheInfo.NonVisibleRecords.LastItem + Value - R1
end;
inherited SetRecno(R)
end;
end;
function TpFIBDataSet.GetRecNo: Integer;
begin
if poVisibleRecno in Options then
Result := VisibleRecNo
else
Result := inherited GetRecNo
end;
procedure TpFIBDataSet.SetRecNo(Value: Integer);
begin
if poVisibleRecno in Options then
SetVisibleRecno(Value)
else
SetRealRecNo(Value);
end;
function TpFIBDataSet.VisibleRecordCount: Integer;
var
Buff: TRecordBuffer;
i: integer;
OldCurrentRec: integer;
begin
if not Filtered then
Result := RecordCount
else
begin
Result := 0;
Buff := AllocRecordBuffer;
OldCurrentRec := FCurrentRecord;
try
if FFilteredCacheInfo.AllRecords <> FRecordCount then
begin
for i := 0 to Pred(FRecordCount) do
begin
FCurrentRecord := i;
ReadRecordCache(FCurrentRecord, Buff, False);
if IsVisible(Buff) then
Inc(Result)
end;
FFilteredCacheInfo.AllRecords := FRecordCount;
FFilteredCacheInfo.FilteredRecords := Result
end
else
begin
Result := FFilteredCacheInfo.FilteredRecords
end
finally
FCurrentRecord := OldCurrentRec;
FreeRecordBuffer(Buff);
end;
end;
end;
function TpFIBDataSet.VisibleRecnoToRecno(VisRN: integer): Integer;
var
i: Integer;
VisCount: integer;
PredRN: integer;
begin
with FFilteredCacheInfo do
if NonVisibleRecords.Count = 0 then
Result := VisRN
else
begin
VisCount := 0;
PredRN := 0;
for i := 0 to NonVisibleRecords.Count - 1 do
begin
Inc(VisCount, NonVisibleRecords[i] - PredRN - 1);
if VisCount > VisRN then
begin
Result := VisRN + i;
Exit;
end
else
PredRN := NonVisibleRecords[i];
end;
Result := VisRN + NonVisibleRecords.Count;
end;
end;
procedure TpFIBDataSet.DoAfterEndUpdateTransaction(
EndingTR:TFIBTransaction;Action: TTransactionAction; Force: Boolean);
begin
if (Action in [TACommit, TACommitRetaining]) then
begin
if (poProtectedEdit in Options) and not CachedUpdates then
CloseProtect;
FHaveUncommitedChanges :=False
end
else
begin
FHaveRollbackedChanges :=FHaveUncommitedChanges or FHaveRollbackedChanges;
FHaveUncommitedChanges :=False
end;
inherited DoAfterEndUpdateTransaction(EndingTR,Action,Force);
end;
function TpFIBDataSet.CanEdit: Boolean; //override;
begin
Result := ((inherited CanEdit or ExistActiveUO(ukModify)
or WillGenerateSQLs
or (CachedUpdates and Assigned(OnUpdateRecord))
)
and (ukModify in FAllowedUpdateKinds)
)
or (drsInCacheRefresh in FRunState)
end;
function TpFIBDataSet.CanInsert: Boolean; //override;
begin
Result := ((inherited CanInsert or ExistActiveUO(ukInsert)
or WillGenerateSQLs
or (CachedUpdates and Assigned(OnUpdateRecord))
)
and (ukInsert in FAllowedUpdateKinds)
)
or (drsInCacheRefresh in FRunState)
end;
function TpFIBDataSet.CanDelete: Boolean;
begin
Result := (inherited CanDelete or ExistActiveUO(ukDelete)
or WillGenerateSQLs
or (CachedUpdates and Assigned(OnUpdateRecord))
)
and (ukDelete in FAllowedUpdateKinds)
end;
function TpFIBDataSet.IsSequenced: Boolean; // Scroll bar
begin
if (CacheModelOptions.CacheModelKind<>cmkStandard) then
Result := False
else
begin
Result := inherited IsSequenced;
if not Result then
if not Filtered or not (poVisibleRecno in Options) then
Result := FAllRecordCount <> 0
else
Result := AllFetched
end;
end;
// UpdateObjects support
function TpFIBDataSet.ListForUO(KindUpdate: TUpdateKind): TList;
begin
Result := nil;
case KindUpdate of
ukModify: Result := vUpdates;
ukInsert: Result := vInserts;
ukDelete: Result := vDeletes;
end;
end;
function TpFIBDataSet.ExistActiveUO(KindUpdate: TUpdateKind): boolean;
var
List: TList;
i, lc: integer;
begin
List := ListForUO(KindUpdate);
Result := False;
if List = nil then
Exit;
lc := Pred(List.Count);
for i := 0 to lc do
begin
Result := TpFIBUpdateObject(List[i]).Active;
if Result then
Exit;
end;
end;
procedure TpFIBDataSet.SynchroOrdersUO(List: TList);
var
i, lc: integer;
begin
lc := Pred(List.Count);
with List do
for i := 0 to lc do
begin
TpFIBUpdateObject(List[i]).ChangeOrderInList(i);
end;
end;
function TpFIBDataSet.AddUpdateObject(Value: TpFIBUpdateObject): integer;
var
List: TList;
OldPos: integer;
begin
Result := -1;
if Value = nil then
Exit;
List := ListForUO(Value.KindUpdate);
if List = nil then
Exit;
with List do
begin
OldPos := IndexOf(Value);
if OldPos = -1 then
begin
if Value.OrderInList < Count then
Insert(Value.OrderInList, Value)
else
Add(Value);
end
else
begin
if Value.OrderInList < Count then
Move(OldPos, Value.OrderInList)
else
Move(OldPos, Pred(Count))
end;
end;
SynchroOrdersUO(List);
Result := List.IndexOf(Value)
end;
procedure TpFIBDataSet.RemoveUpdateObject(Value: TpFIBUpdateObject);
var
List: TList;
begin
if Value = nil then
Exit;
List := ListForUO(Value.KindUpdate);
if List <> nil then
begin
List.Remove(Value);
SynchroOrdersUO(List);
end;
end;
/// Execute UpdateObjects
procedure TpFIBDataSet.ExecUpdateObjects(KindUpdate: TUpdateKind; Buff: TRecordBuffer;
aExecuteOrder: TFIBOrderExecUO
);
var
List: TList;
i: integer;
begin
List := ListForUO(KindUpdate);
if List.Count > 0 then
begin
for i := 0 to Pred(List.Count) do
with TpFIBUpdateObject(List[i]) do
if
Active and (ExecuteOrder = aExecuteOrder) and (not EmptyStrings(SQL))
and (SQL[0]<>SNoAction)
then
begin
AutoStartUpdateTransaction;
SetQueryParams(TpFIBUpdateObject(List[i]), Buff);
ExecQuery;
if SQLType in [SQLSelect, SQLExecProcedure, SQLSelectForUpdate] then
begin
WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
InternalRefreshRow(TpFIBUpdateObject(List[i]), Buff);
end;
FHaveUncommitedChanges:=True;
end;
end;
end;
procedure TpFIBDataSet.SetDataSet_ID(Value: Integer);
begin
if FDataSet_Id = Value then
Exit;
CheckDataSetClosed(' change DataSetID ');
FDataSet_Id := Value;
FPrepared := False;
if Value <> 0 then
PrepareOptions := PrepareOptions + [psApplyRepositary]
end;
procedure TpFIBDataSet.LoadRepositoryInfo;
begin
ListDataSetInfo.LoadDataSetInfo(Self);
end;
procedure TpFIBDataSet.SQLChanging(Sender: TObject);
begin
inherited;
FHaveRollbackedChanges := False;
FHaveUncommitedChanges := False;
end;
{$WARNINGS OFF}
procedure TpFIBDataSet.Prepare; //override;
var
iCurScreenState: Integer;
condApplied: boolean;
begin
ChangeScreenCursor(iCurScreenState);
try
FBase.CheckDatabase;
StartTransaction;
FBase.CheckTransaction;
if (psApplyRepositary in PrepareOptions)
and (DataSet_ID <> 0) and (FLoadedDataSet_ID <> FDataSet_Id)
then
begin
condApplied := Conditions.Applied;
ListDataSetInfo.LoadDataSetInfo(Self);
FLoadedDataSet_ID := FDataSet_Id;
if condApplied then
Conditions.Apply;
end
{ else
FLoadedDataSet_ID:=0;}
;
if not EmptyStrings(FQSelect.SQL) then
begin
if not FQSelect.Open then
FQSelect.Prepare;
if (csDesigning in ComponentState) then
begin
PrepareQuery(skModify);
PrepareQuery(FIBDataSet.skInsert);
PrepareQuery(FIBDataSet.skDelete);
end;
FPrepared := True;
InternalInitFieldDefs;
end
else
FIBError(feEmptyQuery, ['Prepare ' + CmpFullName(Self)]);
finally
RestoreScreenCursor(iCurScreenState);
end;
end;
//{$WARNINGS ON}
function TpFIBDataSet.GetRecordCount: Integer;
begin
Result := inherited GetRecordCount;
if Filtered and (poVisibleRecno in Options) then
Result := VisibleRecordCount
else
if Result < FAllRecordCount - FDeletedRecords then
Result := FAllRecordCount - FDeletedRecords
end;
procedure TpFIBDataSet.InternalPostRecord(Qry: TFIBQuery; Buff: Pointer);
begin
if Qry = QInsert then
ExecUpdateObjects(ukInsert, Buff, oeBeforeDefault)
else
ExecUpdateObjects(ukModify, Buff, oeBeforeDefault);
CheckDataSetOpen(' continue post ');
if not EmptyStrings(Qry.SQL) and (Qry.SQL[0]<>SNoAction) then
begin
AutoStartUpdateTransaction;
SetQueryParams(Qry, Buff);
if Qry.Open then
Qry.Close;
if not Qry.Prepared then
Qry.Prepare;
Qry.ExecQuery;
FHaveUncommitedChanges:=True;
if Qry.SQLType in [SQLSelect, SQLExecProcedure, SQLSelectForUpdate] then
begin
WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
InternalRefreshRow(Qry, Buff);
end;
end;
if Qry = QInsert then
begin
if Assigned(FBlobsUpdate) and (FBlobsUpdate.Active) then
FBlobsUpdate.KindUpdate :=ukInsert;
ExecUpdateObjects(ukInsert, Buff, oeAfterDefault)
end
else
begin
if Assigned(FBlobsUpdate) and (FBlobsUpdate.Active) then
FBlobsUpdate.KindUpdate :=ukModify;
ExecUpdateObjects(ukModify, Buff, oeAfterDefault);
end;
PRecordData(Buff)^.rdFlags := Byte(cusUnmodified);
SetModified(False);
WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
// if not CachedUpdates then
AutoCommitUpdateTransaction;
if not EmptyStrings(FQRefresh.SQL) and (poRefreshAfterPost in Options)
and (CacheModelOptions.CacheModelKind=cmkStandard)
then
begin
DoBeforeRefresh;
if InternalRefreshRow(FQRefresh, Buff) and (BlobFieldCount>0) then
begin
UpdateBlobInfo(Buff,ubiClearOldValue,False,False);
if CachedUpdates then
UpdateBlobInfo(Buff,ubiCheckIsNull,True,False)
else
UpdateBlobInfo(Buff,ubiPost,True,False);
WriteRecordCache(PRecordData(Buff).rdRecordNumber,Buff);
end;
DoAfterRefresh;
end;
UpdateBlobInfo(Buff,ubiClearOldValue,False,False);
end;
procedure TpFIBDataSet.InternalDeleteRecord(Qry: TFIBQuery; Buff: Pointer);
var
vNeedDeleteFromCache:boolean;
begin
if Qry.SQL.Count > 0 then
if Qry.SQL[0] = SNoAction then
Exit;
AutoStartUpdateTransaction;
ExecUpdateObjects(ukDelete, Buff, oeBeforeDefault);
if not EmptyStrings(Qry.SQL) then
begin
SetQueryParams(Qry, Buff);
if not Qry.Prepared then
Qry.Prepare;
Qry.ExecQuery;
if Qry.Open then
Qry.Next;
FHaveUncommitedChanges:=True;
end;
ExecUpdateObjects(ukDelete, Buff, oeAfterDefault);
if poRefreshAfterDelete in Options then
begin
vNeedDeleteFromCache:=not InternalRefreshRow(QRefresh,Buff);
end
else
vNeedDeleteFromCache:=True;
if vNeedDeleteFromCache then
PRecordData(Buff)^.rdFlags := Byte(cusDeletedApplied);
WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
if not FCachedUpdates then
AutoCommitUpdateTransaction;
end;
procedure TpFIBDataSet.DoOnDeleteError
(DataSet: TDataSet; E: DB.EDatabaseError; var Action: TDataAction);
begin
if (GlobalContainer<>nil) and (FContainer<>GlobalContainer) then
GlobalContainer.DataSetError(DataSet, deOnDeleteError, E, Action);
if FContainer <> nil then
FContainer.DataSetError(DataSet, deOnDeleteError, E, Action);
if Assigned(vUserOnDeleteError) then
vUserOnDeleteError(DataSet, E, Action);
end;
function TpFIBDataSet.CompareFieldValues(Field:TField;const S1,S2:variant):integer;
var
Compared:boolean;
begin
Compared:=False;
if (GlobalContainer<>nil) and (FContainer<>GlobalContainer) then
Compared:=GlobalContainer.DataSetCompareFieldValues(Self, Field,S1,S2,Result);
if FContainer <> nil then
Compared:=FContainer.DataSetCompareFieldValues(Self, Field,S1,S2,Result);
if not Compared then
Result:= inherited CompareFieldValues(Field,S1,S2);
end;
procedure TpFIBDataSet.DoOnPostError