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root/public/ibx/trunk/runtime/IBCustomDataSet.pas

Comparing ibx/trunk/runtime/IBCustomDataSet.pas (file contents):
Revision 100 by tony, Mon Jan 1 11:31:07 2018 UTC vs.
Revision 101 by tony, Thu Jan 18 14:37:18 2018 UTC

#	Line 53 | Line 53 | uses
53		unix,
54		{$ENDIF}
55		SysUtils, Classes, IBDatabase, IBExternals, IB,  IBSQL, Db,
56	<	IBUtils, IBBlob, IBSQLParser;
56	>	IBUtils, IBBlob, IBSQLParser, IBDatabaseInfo;
57
58		const
59		BufferCacheSize    =  1000;  { Allocate cache in this many record chunks}
#	Line 76 | Line 76 | type
76		function GetSQL(UpdateKind: TUpdateKind): TStrings; virtual; abstract;
77		procedure InternalSetParams(Params: ISQLParams; buff: PChar); overload;
78		procedure InternalSetParams(Query: TIBSQL; buff: PChar); overload;
79	+	procedure UpdateRecordFromQuery(QryResults: IResults; Buffer: PChar);
80		property DataSet: TIBCustomDataSet read GetDataSet write SetDataSet;
81		public
82		constructor Create(AOwner: TComponent); override;
#	Line 208 | Line 209 | type
209		Note: y > 4 will default to Floats
210		}
211		TIBBCDField = class(TBCDField)
212	+	private
213	+	FIdentityColumn: boolean;
214		protected
215	+	procedure Bind(Binding: Boolean); override;
216		class procedure CheckTypeSize(Value: Integer); override;
217		function GetAsCurrency: Currency; override;
218		function GetAsString: string; override;
#	Line 216 | Line 220 | type
220		function GetDataSize: Integer; override;
221		public
222		constructor Create(AOwner: TComponent); override;
223	+	property IdentityColumn: boolean read FIdentityColumn;
224		published
225		property Size default 8;
226		end;
227
228	+	{The following integer field types extend the built in versions to enable IBX appplications
229	+	to check for an Identity column}
230	+
231	+	{ TIBSmallintField }
232	+
233	+	TIBSmallintField = class(TSmallintField)
234	+	private
235	+	FIdentityColumn: boolean;
236	+	protected
237	+	procedure Bind(Binding: Boolean); override;
238	+	public
239	+	property IdentityColumn: boolean read FIdentityColumn;
240	+	end;
241	+
242	+	{ TIBIntegerField }
243	+
244	+	TIBIntegerField = class(TIntegerField)
245	+	private
246	+	FIdentityColumn: boolean;
247	+	protected
248	+	procedure Bind(Binding: Boolean); override;
249	+	public
250	+	property IdentityColumn: boolean read FIdentityColumn;
251	+	end;
252	+
253	+	{ TIBLargeIntField }
254	+
255	+	TIBLargeIntField = class(TLargeIntField)
256	+	private
257	+	FIdentityColumn: boolean;
258	+	protected
259	+	procedure Bind(Binding: Boolean); override;
260	+	public
261	+	property IdentityColumn: boolean read FIdentityColumn;
262	+	end;
263	+
264		{TIBMemoField}
265		{Allows us to show truncated text in DBGrids and anything else that uses
266		DisplayText}
#	Line 360 | Line 401 | type
401		FQRefresh,
402		FQSelect,
403		FQModify: TIBSQL;
404	+	FDatabaseInfo: TIBDatabaseInfo;
405		FRecordBufferSize: Integer;
406		FRecordCount: Integer;
407		FRecordSize: Integer;
#	Line 389 | Line 431 | type
431		FInTransactionEnd: boolean;
432		FIBLinks: TList;
433		FFieldColumns: PFieldColumns;
434	+	procedure ColumnDataToBuffer(QryResults: IResults; ColumnIndex,
435	+	FieldIndex: integer; Buffer: PChar);
436		procedure InitModelBuffer(Qry: TIBSQL; Buffer: PChar);
437		function GetSelectStmtIntf: IStatement;
438		procedure SetUpdateMode(const Value: TUpdateMode);
#	Line 443 | Line 487 | type
487		procedure SetTransaction(Value: TIBTransaction);
488		procedure SetUpdateRecordTypes(Value: TIBUpdateRecordTypes);
489		procedure SetUniDirectional(Value: Boolean);
490	+	procedure UpdateRecordFromQuery(QryResults: IResults; Buffer: PChar);
491		procedure RefreshParams;
492		function AdjustPosition(FCache: PChar; Offset: DWORD;
493		Origin: Integer): DWORD;
#	Line 791 | Line 836 | type
836		FCharacterSetName: RawByteString;
837		FCharacterSetSize: integer;
838		FCodePage: TSystemCodePage;
839	+	FIdentityColumn: boolean;
840		FRelationName: string;
841		FDataSize: integer;
842		published
#	Line 801 | Line 847 | type
847		property RelationName: string read FRelationName write FRelationName;
848		property ArrayDimensions: integer read FArrayDimensions write FArrayDimensions;
849		property ArrayBounds: TArrayBounds read FArrayBounds write FArrayBounds;
850	+	property IdentityColumn: boolean read FIdentityColumn write FIdentityColumn default false;
851		end;
852
853		const
854		DefaultFieldClasses: array[TFieldType] of TFieldClass = (
855		nil,                { ftUnknown }
856		TIBStringField,     { ftString }
857	<	TSmallintField,     { ftSmallint }
858	<	TIntegerField,      { ftInteger }
857	>	TIBSmallintField,   { ftSmallint }
858	>	TIBIntegerField,      { ftInteger }
859		TWordField,         { ftWord }
860		TBooleanField,      { ftBoolean }
861		TFloatField,        { ftFloat }
#	Line 830 | Line 877 | DefaultFieldClasses: array[TFieldType] o
877		nil,                { ftCursor }
878		TStringField,       { ftFixedChar }
879		nil,    { ftWideString }
880	<	TLargeIntField,     { ftLargeInt }
880	>	TIBLargeIntField,     { ftLargeInt }
881		nil,          { ftADT }
882		TIBArrayField,        { ftArray }
883		nil,    { ftReference }
#	Line 874 | Line 921 | type
921		FieldName : String;
922		COMPUTED_BLR : Boolean;
923		DEFAULT_VALUE : boolean;
924	+	IDENTITY_COLUMN : boolean;
925		NextField : TFieldNode;
926		end;
927
#	Line 926 | Line 974 | type
974		Result := str;
975		end;
976
977	+	{ TIBLargeIntField }
978	+
979	+	procedure TIBLargeIntField.Bind(Binding: Boolean);
980	+	begin
981	+	inherited Bind(Binding);
982	+	if Binding and (FieldDef <> nil) then
983	+	FIdentityColumn := (FieldDef as TIBFieldDef).IdentityColumn;
984	+	end;
985	+
986	+	{ TIBIntegerField }
987	+
988	+	procedure TIBIntegerField.Bind(Binding: Boolean);
989	+	begin
990	+	inherited Bind(Binding);
991	+	if Binding and (FieldDef <> nil) then
992	+	FIdentityColumn := (FieldDef as TIBFieldDef).IdentityColumn;
993	+	end;
994	+
995	+	{ TIBSmallintField }
996	+
997	+	procedure TIBSmallintField.Bind(Binding: Boolean);
998	+	begin
999	+	inherited Bind(Binding);
1000	+	if Binding and (FieldDef <> nil) then
1001	+	FIdentityColumn := (FieldDef as TIBFieldDef).IdentityColumn;
1002	+	end;
1003	+
1004		{ TIBArray }
1005
1006		procedure TIBArray.EventHandler(Sender: IArray; Reason: TArrayEventReason);
#	Line 1035 | Line 1110 | begin
1110		{2: case 2 ignored. This should be handled by TIBWideMemo}
1111
1112		3, {Assume UNICODE_FSS is really UTF8}
1113	<	4: {Include GB18030 - assuming UTF8 routine work for this codeset}
1113	>	4: {Include GB18030 - assuming UTF8 routines work for this codeset}
1114		if DisplayWidth = 0 then
1115		Result := ValidUTF8String(TextToSingleLine(Result))
1116		else
#	Line 1237 | Line 1312 | begin
1312		Size := 8;
1313		end;
1314
1315	+	procedure TIBBCDField.Bind(Binding: Boolean);
1316	+	begin
1317	+	inherited Bind(Binding);
1318	+	if Binding and (FieldDef <> nil) then
1319	+	FIdentityColumn := (FieldDef as TIBFieldDef).IdentityColumn;
1320	+	end;
1321	+
1322		class procedure TIBBCDField.CheckTypeSize(Value: Integer);
1323		begin
1324		{ No need to check as the base type is currency, not BCD }
#	Line 1322 | Line 1404 | constructor TIBCustomDataSet.Create(AOwn
1404		begin
1405		inherited Create(AOwner);
1406		FBase := TIBBase.Create(Self);
1407	+	FDatabaseInfo := TIBDatabaseInfo.Create(self);
1408		FIBLinks := TList.Create;
1409		FCurrentRecord := -1;
1410		FDeletedRecords := 0;
#	Line 1960 | Line 2043 | begin
2043		end;
2044		end;
2045
2046	+	{Update Buffer Fields from Query Results}
2047	+
2048	+	procedure TIBCustomDataSet.UpdateRecordFromQuery(QryResults: IResults;
2049	+	Buffer: PChar);
2050	+	var i, j: integer;
2051	+	begin
2052	+	for i := 0 to QryResults.Count - 1 do
2053	+	begin
2054	+	j := GetFieldPosition(QryResults[i].GetAliasName);
2055	+	if j > 0 then
2056	+	ColumnDataToBuffer(QryResults,i,j,Buffer);
2057	+	end;
2058	+	end;
2059	+
2060	+
2061	+	{Move column data returned from query to row buffer}
2062	+
2063	+	procedure TIBCustomDataSet.ColumnDataToBuffer(QryResults: IResults;
2064	+	ColumnIndex, FieldIndex: integer; Buffer: PChar);
2065	+	var
2066	+	LocalData: PByte;
2067	+	LocalDate, LocalDouble: Double;
2068	+	LocalInt: Integer;
2069	+	LocalBool: wordBool;
2070	+	LocalInt64: Int64;
2071	+	LocalCurrency: Currency;
2072	+	p: PRecordData;
2073	+	ColData: ISQLData;
2074	+	begin
2075	+	p := PRecordData(Buffer);
2076	+	LocalData := nil;
2077	+	with p^.rdFields[FieldIndex], FFieldColumns^[FieldIndex] do
2078	+	begin
2079	+	QryResults.GetData(ColumnIndex,fdIsNull,fdDataLength,LocalData);
2080	+	if not fdIsNull then
2081	+	begin
2082	+	ColData := QryResults[ColumnIndex];
2083	+	case fdDataType of  {Get Formatted data for column types that need formatting}
2084	+	SQL_TIMESTAMP:
2085	+	begin
2086	+	LocalDate := TimeStampToMSecs(DateTimeToTimeStamp(ColData.AsDateTime));
2087	+	LocalData := PByte(@LocalDate);
2088	+	end;
2089	+	SQL_TYPE_DATE:
2090	+	begin
2091	+	LocalInt := DateTimeToTimeStamp(ColData.AsDateTime).Date;
2092	+	LocalData := PByte(@LocalInt);
2093	+	end;
2094	+	SQL_TYPE_TIME:
2095	+	begin
2096	+	LocalInt := DateTimeToTimeStamp(ColData.AsDateTime).Time;
2097	+	LocalData := PByte(@LocalInt);
2098	+	end;
2099	+	SQL_SHORT, SQL_LONG:
2100	+	begin
2101	+	if (fdDataScale = 0) then
2102	+	begin
2103	+	LocalInt := ColData.AsLong;
2104	+	LocalData := PByte(@LocalInt);
2105	+	end
2106	+	else
2107	+	if (fdDataScale >= (-4)) then
2108	+	begin
2109	+	LocalCurrency := ColData.AsCurrency;
2110	+	LocalData := PByte(@LocalCurrency);
2111	+	end
2112	+	else
2113	+	begin
2114	+	LocalDouble := ColData.AsDouble;
2115	+	LocalData := PByte(@LocalDouble);
2116	+	end;
2117	+	end;
2118	+	SQL_INT64:
2119	+	begin
2120	+	if (fdDataScale = 0) then
2121	+	begin
2122	+	LocalInt64 := ColData.AsInt64;
2123	+	LocalData := PByte(@LocalInt64);
2124	+	end
2125	+	else
2126	+	if (fdDataScale >= (-4)) then
2127	+	begin
2128	+	LocalCurrency := ColData.AsCurrency;
2129	+	LocalData := PByte(@LocalCurrency);
2130	+	end
2131	+	else
2132	+	begin
2133	+	LocalDouble := ColData.AsDouble;
2134	+	LocalData := PByte(@LocalDouble);
2135	+	end
2136	+	end;
2137	+	SQL_DOUBLE, SQL_FLOAT, SQL_D_FLOAT:
2138	+	begin
2139	+	LocalDouble := ColData.AsDouble;
2140	+	LocalData := PByte(@LocalDouble);
2141	+	end;
2142	+	SQL_BOOLEAN:
2143	+	begin
2144	+	LocalBool := ColData.AsBoolean;
2145	+	LocalData := PByte(@LocalBool);
2146	+	end;
2147	+	end;
2148	+
2149	+	if fdDataType = SQL_VARYING then
2150	+	Move(LocalData^, Buffer[fdDataOfs], fdDataLength)
2151	+	else
2152	+	Move(LocalData^, Buffer[fdDataOfs], fdDataSize)
2153	+	end
2154	+	else {Null column}
2155	+	if fdDataType = SQL_VARYING then
2156	+	FillChar(Buffer[fdDataOfs],fdDataLength,0)
2157	+	else
2158	+	FillChar(Buffer[fdDataOfs],fdDataSize,0);
2159	+	end;
2160	+	end;
2161	+
2162		{ Read the record from FQSelect.Current into the record buffer
2163		Then write the buffer to in memory cache }
2164		procedure TIBCustomDataSet.FetchCurrentRecordToBuffer(Qry: TIBSQL;
#	Line 1968 | Line 2167 | var
2167		pbd: PBlobDataArray;
2168		pda: PArrayDataArray;
2169		i, j: Integer;
1971	–	LocalData: PByte;
1972	–	LocalDate, LocalDouble: Double;
1973	–	LocalInt: Integer;
1974	–	LocalBool: wordBool;
1975	–	LocalInt64: Int64;
1976	–	LocalCurrency: Currency;
2170		FieldsLoaded: Integer;
2171		p: PRecordData;
2172		begin
#	Line 2024 | Line 2217 | begin
2217		continue;
2218		end;
2219		if j > 0 then
2220	<	begin
2028	<	LocalData := nil;
2029	<	with p^.rdFields[j], FFieldColumns^[j] do
2030	<	begin
2031	<	Qry.Current.GetData(i,fdIsNull,fdDataLength,LocalData);
2032	<	if not fdIsNull then
2033	<	begin
2034	<	case fdDataType of  {Get Formatted data for column types that need formatting}
2035	<	SQL_TIMESTAMP:
2036	<	begin
2037	<	LocalDate := TimeStampToMSecs(DateTimeToTimeStamp(Qry[i].AsDateTime));
2038	<	LocalData := PByte(@LocalDate);
2039	<	end;
2040	<	SQL_TYPE_DATE:
2041	<	begin
2042	<	LocalInt := DateTimeToTimeStamp(Qry[i].AsDateTime).Date;
2043	<	LocalData := PByte(@LocalInt);
2044	<	end;
2045	<	SQL_TYPE_TIME:
2046	<	begin
2047	<	LocalInt := DateTimeToTimeStamp(Qry[i].AsDateTime).Time;
2048	<	LocalData := PByte(@LocalInt);
2049	<	end;
2050	<	SQL_SHORT, SQL_LONG:
2051	<	begin
2052	<	if (fdDataScale = 0) then
2053	<	begin
2054	<	LocalInt := Qry[i].AsLong;
2055	<	LocalData := PByte(@LocalInt);
2056	<	end
2057	<	else
2058	<	if (fdDataScale >= (-4)) then
2059	<	begin
2060	<	LocalCurrency := Qry[i].AsCurrency;
2061	<	LocalData := PByte(@LocalCurrency);
2062	<	end
2063	<	else
2064	<	begin
2065	<	LocalDouble := Qry[i].AsDouble;
2066	<	LocalData := PByte(@LocalDouble);
2067	<	end;
2068	<	end;
2069	<	SQL_INT64:
2070	<	begin
2071	<	if (fdDataScale = 0) then
2072	<	begin
2073	<	LocalInt64 := Qry[i].AsInt64;
2074	<	LocalData := PByte(@LocalInt64);
2075	<	end
2076	<	else
2077	<	if (fdDataScale >= (-4)) then
2078	<	begin
2079	<	LocalCurrency := Qry[i].AsCurrency;
2080	<	LocalData := PByte(@LocalCurrency);
2081	<	end
2082	<	else
2083	<	begin
2084	<	LocalDouble := Qry[i].AsDouble;
2085	<	LocalData := PByte(@LocalDouble);
2086	<	end
2087	<	end;
2088	<	SQL_DOUBLE, SQL_FLOAT, SQL_D_FLOAT:
2089	<	begin
2090	<	LocalDouble := Qry[i].AsDouble;
2091	<	LocalData := PByte(@LocalDouble);
2092	<	end;
2093	<	SQL_BOOLEAN:
2094	<	begin
2095	<	LocalBool := Qry[i].AsBoolean;
2096	<	LocalData := PByte(@LocalBool);
2097	<	end;
2098	<	end;
2099	<
2100	<	if fdDataType = SQL_VARYING then
2101	<	Move(LocalData^, Buffer[fdDataOfs], fdDataLength)
2102	<	else
2103	<	Move(LocalData^, Buffer[fdDataOfs], fdDataSize)
2104	<	end
2105	<	else {Null column}
2106	<	if fdDataType = SQL_VARYING then
2107	<	FillChar(Buffer[fdDataOfs],fdDataLength,0)
2108	<	else
2109	<	FillChar(Buffer[fdDataOfs],fdDataSize,0);
2110	<	end;
2111	<	end;
2220	>	ColumnDataToBuffer(Qry.Current,i,j,Buffer);
2221		end;
2222		WriteRecordCache(RecordNumber, Buffer);
2223		end;
#	Line 2355 | Line 2464 | begin
2464		SetInternalSQLParams(Qry.Params, Buff);
2465		Qry.ExecQuery;
2466		end;
2467	+	if Qry.FieldCount > 0 then {Has RETURNING Clause}
2468	+	UpdateRecordFromQuery(Qry.Current,Buff);
2469		PRecordData(Buff)^.rdUpdateStatus := usUnmodified;
2470		PRecordData(Buff)^.rdCachedUpdateStatus := cusUnmodified;
2471		SetModified(False);
#	Line 2605 | Line 2716 | begin
2716		FQRefresh.Database := Value;
2717		FQSelect.Database := Value;
2718		FQModify.Database := Value;
2719	+	FDatabaseInfo.Database := Value;
2720		end;
2721		end;
2722
#	Line 3674 | Line 3786 | const
3786		'and R.RDB$FIELD_SOURCE = F.RDB$FIELD_NAME '+ {do not localize}
3787		'and ((not F.RDB$COMPUTED_BLR is NULL) or ' + {do not localize}
3788		'     (not F.RDB$DEFAULT_VALUE is NULL)) '; {do not localize}
3789	+
3790	+	DefaultSQLODS12 = 'Select F.RDB$COMPUTED_BLR, ' + {do not localize}
3791	+	'F.RDB$DEFAULT_VALUE, R.RDB$FIELD_NAME, R.RDB$IDENTITY_TYPE ' + {do not localize}
3792	+	'from RDB$RELATION_FIELDS R, RDB$FIELDS F ' + {do not localize}
3793	+	'where R.RDB$RELATION_NAME = :RELATION ' +  {do not localize}
3794	+	'and R.RDB$FIELD_SOURCE = F.RDB$FIELD_NAME '+ {do not localize}
3795	+	'and ((not F.RDB$COMPUTED_BLR is NULL) or ' + {do not localize}
3796	+	'     (not F.RDB$DEFAULT_VALUE is NULL) or ' + {do not localize}
3797	+	'     ( not R.RDB$IDENTITY_TYPE is NULL))' ; {do not localize}
3798	+
3799		var
3800		FieldType: TFieldType;
3801		FieldSize: Word;
#	Line 3714 | Line 3836 | var
3836		FField.FieldName := Query.Fields[2].AsString;
3837		FField.DEFAULT_VALUE := not Query.Fields[1].IsNull;
3838		FField.COMPUTED_BLR := not Query.Fields[0].IsNull;
3839	+	FField.IDENTITY_COLUMN := (Query.FieldCount > 3) and not Query.Fields[3].IsNull;
3840		FField.NextField := Result.FieldNodes;
3841		Result.FieldNodes := FField;
3842		Query.Next;
#	Line 3767 | Line 3890 | var
3890		FField := Ffield.NextField;
3891		end;
3892
3893	+	function Is_IDENTITY_COLUMN(Relation, Field : String) : Boolean;
3894	+	var
3895	+	FRelation : TRelationNode;
3896	+	FField : TFieldNode;
3897	+	begin
3898	+	FRelation := FRelationNodes;
3899	+	while Assigned(FRelation) and
3900	+	(FRelation.RelationName <> Relation) do
3901	+	FRelation := FRelation.NextRelation;
3902	+	if not Assigned(FRelation) then
3903	+	FRelation := Add_Node(Relation, Field);
3904	+	Result := false;
3905	+	FField := FRelation.FieldNodes;
3906	+	while Assigned(FField) do
3907	+	if FField.FieldName = Field then
3908	+	begin
3909	+	Result := Ffield.IDENTITY_COLUMN;
3910	+	Exit;
3911	+	end
3912	+	else
3913	+	FField := Ffield.NextField;
3914	+	end;
3915	+
3916		Procedure FreeNodes;
3917		var
3918		FRelation : TRelationNode;
#	Line 3800 | Line 3946 | begin
3946		FieldIndex := 0;
3947		if (Length(FMappedFieldPosition) < SourceQuery.MetaData.Count) then
3948		SetLength(FMappedFieldPosition, SourceQuery.MetaData.Count);
3949	<	Query.SQL.Text := DefaultSQL;
3949	>	if FDatabaseInfo.ODSMajorVersion >= 12 then
3950	>	Query.SQL.Text := DefaultSQLODS12
3951	>	else
3952	>	Query.SQL.Text := DefaultSQL;
3953		Query.Prepare;
3954		SetLength(FAliasNameMap, SourceQuery.MetaData.Count);
3955		SetLength(FAliasNameList, SourceQuery.MetaData.Count);
#	Line 3939 | Line 4088 | begin
4088		ArrayBounds := aArrayBounds;
4089		if (FieldName <> '') and (RelationName <> '') then
4090		begin
4091	+	IdentityColumn := Is_IDENTITY_COLUMN(RelationName, FieldName);
4092		if Has_COMPUTED_BLR(RelationName, FieldName) then
4093		begin
4094		Attributes := [faReadOnly];
#	Line 4841 | Line 4991 | begin
4991		InternalSetParams(Query.Params,buff);
4992		end;
4993
4994	+	procedure TIBDataSetUpdateObject.UpdateRecordFromQuery(QryResults: IResults;
4995	+	Buffer: PChar);
4996	+	begin
4997	+	if not Assigned(DataSet) then Exit;
4998	+	DataSet.UpdateRecordFromQuery(QryResults, Buffer);
4999	+	end;
5000	+
5001		function TIBDSBlobStream.GetSize: Int64;
5002		begin
5003		Result := FBlobStream.BlobSize;

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