client/3.0/FB30Array.pas

(*
 *  Firebird Interface (fbintf). The fbintf components provide a set of
 *  Pascal language bindings for the Firebird API.
 *
 *  The contents of this file are subject to the Initial Developer's
 *  Public License Version 1.0 (the "License"); you may not use this
 *  file except in compliance with the License. You may obtain a copy
 *  of the License here:
 *
 *    http://www.firebirdsql.org/index.php?op=doc&id=idpl
 *
 *  Software distributed under the License is distributed on an "AS
 *  IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
 *  implied. See the License for the specific language governing rights
 *  and limitations under the License.
 *
 *  The Initial Developer of the Original Code is Tony Whyman.
 *
 *  The Original Code is (C) 2016 Tony Whyman, MWA Software
 *  (http://www.mwasoftware.co.uk).
 *
 *  All Rights Reserved.
 *
 *  Contributor(s): ______________________________________.
 *
*)
unit FB30Array;
{$IFDEF MSWINDOWS} 
{$DEFINE WINDOWS} 
{$ENDIF}

{$IFDEF FPC}
{$mode delphi}
{$codepage UTF8}
{$interfaces COM}
{$ENDIF}

interface

uses
  Classes, SysUtils, Firebird, IB, FBArray, IBHeader, FB30Attachment, FBClientAPI,
  FB30Transaction, FBParamBlock, FB30ClientAPI;

type

  ISDLItem = interface(IParameterBlockItem)
    ['{a34b6064-5ae9-4fc1-85c3-f145f069b607}']
    procedure addByte(aValue: byte);
    procedure addShortInt(aValue: ShortInt);
    procedure addShortInteger(aValue: integer);
    procedure SetAsShortInteger(aValue: integer);
    procedure SetAsTinyInteger(aValue: integer);
  end;

  ISDL = interface(IParameterBlock<ISDLItem>)
    ['{52ae1f5f-657b-4b14-81aa-7b3658454f4c}']
  end;

  { TFB30ArrayMetaData }

  TFB30ArrayMetaData = class(TFBArrayMetaData,IArrayMetaData)
  private
    FCodePage: TSystemCodePage;
    FCharSetWidth: integer;
  protected
    procedure LoadMetaData(aAttachment: IAttachment; aTransaction: ITransaction;
                   relationName, columnName: AnsiString); override;
  public
    function GetCharSetID: cardinal; override;
    function GetCodePage: TSystemCodePage; override;
    function GetCharSetWidth: integer; override;
  end;

  { TFB30Array }

  TFB30Array = class(TFBArray,IArray)
  private
    FAttachmentIntf: Firebird.IAttachment;
    FTransactionIntf: Firebird.ITransaction;
    FFirebird30ClientAPI: TFB30ClientAPI;
    FSDL: ISDL;
    procedure GenerateSDL;
  protected
    procedure AllocateBuffer; override;
    procedure InternalGetSlice; override;
    procedure InternalPutSlice(Force: boolean); override;
  public
    constructor Create(aAttachment: TFB30Attachment; aTransaction: TFB30Transaction; aField: IArrayMetaData); overload;
    constructor Create(aAttachment: TFB30Attachment; aTransaction: TFB30Transaction; aField: IArrayMetaData; ArrayID: TISC_QUAD); overload;
  end;

  TSDLItem = class(TParamBlockItem,ISDLItem);

  { TSDLBlock }

  TSDLBlock = class (TCustomParamBlock<TSDLItem,ISDLItem>, ISDL)
  public
    constructor Create(api: TFBClientAPI);
  end;

implementation

uses FBAttachment, FB30Statement;

const
  sGetArrayMetaData = 'Select F.RDB$FIELD_LENGTH, F.RDB$FIELD_SCALE, F.RDB$FIELD_TYPE, '+
                      'F.RDB$DIMENSIONS, FD.RDB$DIMENSION, FD.RDB$LOWER_BOUND, FD.RDB$UPPER_BOUND, '+
                      'F.RDB$CHARACTER_SET_ID '+
                      'From RDB$FIELDS F JOIN RDB$RELATION_FIELDS RF '+
                      'On F.RDB$FIELD_NAME = RF.RDB$FIELD_SOURCE JOIN RDB$FIELD_DIMENSIONS FD '+
                      'On FD.RDB$FIELD_NAME = F.RDB$FIELD_NAME ' +
                      'Where RF.RDB$RELATION_NAME = ? and RF.RDB$FIELD_NAME = ? ' +
                      'UNION '+
                      'Select F.RDB$FIELD_LENGTH, F.RDB$FIELD_SCALE, F.RDB$FIELD_TYPE, '+
                      'F.RDB$DIMENSIONS, FD.RDB$DIMENSION, FD.RDB$LOWER_BOUND, FD.RDB$UPPER_BOUND, '+
                      'F.RDB$CHARACTER_SET_ID '+
                      'From RDB$FIELDS F JOIN RDB$PROCEDURE_PARAMETERS PP '+
                      'On F.RDB$FIELD_NAME = PP.RDB$FIELD_SOURCE JOIN RDB$FIELD_DIMENSIONS FD '+
                      'On FD.RDB$FIELD_NAME = F.RDB$FIELD_NAME ' +
                      'Where PP.RDB$PROCEDURE_NAME = ? and PP.RDB$PARAMETER_NAME = ? '+
                      'Order by 5 asc';


{ TFB30ArrayMetaData }

{Assemble the array descriptor from the System Tables}

procedure TFB30ArrayMetaData.LoadMetaData(aAttachment: IAttachment;
  aTransaction: ITransaction; relationName, columnName: AnsiString);
var stmt: IStatement;
    CharWidth: integer;
begin
  CharWidth := 0;
  RelationName := AnsiUpperCase(RelationName);
  ColumnName := AnsiUpperCase(ColumnName);
  stmt := TFB30Statement.Create(aAttachment as TFB30Attachment,aTransaction,
                               sGetArrayMetaData ,aAttachment.GetSQLDialect);
  with stmt do
  begin
    SQLParams[0].AsString := RelationName;
    SQLParams[1].AsString := ColumnName;
    SQLParams[2].AsString := RelationName;
    SQLParams[3].AsString := ColumnName;
    with OpenCursor do
    if FetchNext then
    begin
      FillChar(FArrayDesc.array_desc_field_name,sizeof(FArrayDesc.array_desc_field_name),' ');
      FillChar(FArrayDesc.array_desc_relation_name,sizeof(FArrayDesc.array_desc_relation_name),' ');
      Move(columnName[1],FArrayDesc.array_desc_field_name,Length(columnName));
      Move(relationName[1],FArrayDesc.array_desc_relation_name,length(relationName));
      FArrayDesc.array_desc_length := Data[0].AsInteger;
      FArrayDesc.array_desc_scale := Data[1].AsInteger;
      FArrayDesc.array_desc_dtype := Data[2].AsInteger;
      FArrayDesc.array_desc_dimensions := Data[3].AsInteger;
      FArrayDesc.array_desc_flags := 0; {row major}
      FCharSetID := Data[7].AsInteger;
      if (FCharSetID > 1) and (aAttachment as TFB30Attachment).HasDefaultCharSet then
        FCharSetID := (aAttachment as TFB30Attachment).CharSetID;
      FCodePage := CP_NONE;
      FAttachment.CharSetID2CodePage(FCharSetID,FCodePage);
      FCharSetWidth := 1;
      FAttachment.CharSetWidth(FCharSetID,FCharSetWidth);
      if (FArrayDesc.array_desc_dtype in [blr_text,blr_cstring, blr_varying]) and
        (FCharSetID = 0) then {This really shouldn't be necessary - but it is :(}
      with aAttachment as TFBAttachment do
      begin
        if HasDefaultCharSet  and FAttachment.CharSetWidth(CharSetID,CharWidth) then
          FArrayDesc.array_desc_length := FArrayDesc.array_desc_length * CharWidth;
      end;
      repeat
        with FArrayDesc.array_desc_bounds[Data[4].AsInteger] do
        begin
          array_bound_lower := Data[5].AsInteger;
          array_bound_upper := Data[6].AsInteger;
        end;
      until not FetchNext;
    end;
  end;
end;

function TFB30ArrayMetaData.GetCharSetID: cardinal;
begin
  Result := FCharSetID;
end;

function TFB30ArrayMetaData.GetCodePage: TSystemCodePage;
begin
  Result := FCodePage;
end;

function TFB30ArrayMetaData.GetCharSetWidth: integer;
begin
  Result := FCharSetWidth;
end;

{ TFB30Array }

procedure TFB30Array.GenerateSDL;

  procedure AddVarInteger(aValue: integer);
  begin
    if (aValue >= -128) and (aValue <= 127) then
      FSDL.Add(isc_sdl_tiny_integer).SetAsTinyInteger(aValue)
    else
    if (aValue >= -32768) and (aValue <= 32767) then
      FSDL.Add(isc_sdl_short_integer).SetAsShortInteger(aValue)
    else
      FSDL.Add(isc_sdl_long_integer).SetAsInteger(aValue);
  end;

var i: integer;
    SDLItem: ISDLItem;
begin
  FSDL := TSDLBlock.Create(FFirebird30ClientAPI);
  with GetArrayDesc^ do
  {The following is based on gen_SDL from Firebird src/dsql/array.cpp}
  begin
    SDLItem := FSDL.Add(isc_sdl_struct);
    SDLItem.SetAsByte(array_desc_dtype);

    case array_desc_dtype of
    blr_short,blr_long,
    blr_int64,blr_quad,
    blr_int128:
        SDLItem.AddShortInt(array_desc_scale);

    blr_text,blr_cstring, blr_varying:
        SDLItem.addShortInteger(array_desc_length);
    end;

    FSDL.Add(isc_sdl_relation).SetAsString(array_desc_relation_name);
    FSDL.Add(isc_sdl_field).SetAsString(array_desc_field_name);

    for i := 0 to array_desc_dimensions - 1 do
    begin
      if array_desc_bounds[i].array_bound_lower = 1 then
        FSDL.Add(isc_sdl_do1).SetAsTinyInteger(i)
      else
      begin
        FSDL.Add(isc_sdl_do2).SetAsTinyInteger(i);
        AddVarInteger(array_desc_bounds[i].array_bound_lower);
      end;
      AddVarInteger(array_desc_bounds[i].array_bound_upper);
    end;

    SDLItem := FSDL.Add(isc_sdl_element);
    SDLItem.AddByte(1);
    SDLItem := FSDL.Add(isc_sdl_scalar);
    SDLItem.AddByte(0);
    SDLItem.AddByte(array_desc_dimensions);
    for i := 0 to array_desc_dimensions - 1 do
    begin
      SDLItem := FSDL.Add(isc_sdl_variable);
      SDLItem.AddByte(i);
    end;
    FSDL.Add(isc_sdl_eoc);
  end;
end;

procedure TFB30Array.AllocateBuffer;

begin
  inherited AllocateBuffer;
  {Now set up the SDL}
  GenerateSDL;
end;

procedure TFB30Array.InternalGetSlice;
begin
  with FFirebird30ClientAPI do
  begin
    FAttachmentIntf.getSlice(StatusIntf,FTransactionIntf,
                          @FArrayID,
                          (FSDL as TSDLBlock).getDataLength,
                          BytePtr((FSDL as TSDLBlock).getBuffer),
                          0,nil,
                          FBufSize,BytePtr(FBuffer)
                          );
    Check4DataBaseError;
  end;
  SignalActivity;
end;

procedure TFB30Array.InternalPutSlice(Force: boolean);
begin
  with FFirebird30ClientAPI do
  begin
    FAttachmentIntf.putSlice(StatusIntf,FTransactionIntf, @FArrayID,
                          (FSDL as TSDLBlock).getDataLength,
                          BytePtr((FSDL as TSDLBlock).getBuffer),
                          0,nil,
                          FBufSize,BytePtr(FBuffer)
                          );
    if not Force then
      Check4DataBaseError;
  end;
  SignalActivity;
end;

constructor TFB30Array.Create(aAttachment: TFB30Attachment;
  aTransaction: TFB30Transaction; aField: IArrayMetaData);
begin
  inherited Create(aAttachment,aTransaction,aField);
  FAttachmentIntf := aAttachment.AttachmentIntf;
  FTransactionIntf := aTransaction.TransactionIntf;
  FFirebird30ClientAPI := aAttachment.Firebird30ClientAPI;
end;

constructor TFB30Array.Create(aAttachment: TFB30Attachment;
  aTransaction: TFB30Transaction; aField: IArrayMetaData; ArrayID: TISC_QUAD);
begin
  inherited Create(aAttachment,aTransaction,aField,ArrayID);
  FAttachmentIntf := aAttachment.AttachmentIntf;
  FTransactionIntf := aTransaction.TransactionIntf;
  FFirebird30ClientAPI := aAttachment.Firebird30ClientAPI;
end;

{ TSDLBlock }

constructor TSDLBlock.Create(api: TFBClientAPI);
begin
  inherited Create(api);
  FDataLength := 1;
  FBuffer^ := isc_sdl_version1;
end;

end.

Revision:	315
Committed:	Thu Feb 25 11:56:36 2021 UTC (3 years, 8 months ago) by tony
Content type:	text/x-pascal
File size:	10731 byte(s)
Log Message:	Updated for IBX 4 release
#	Content
1	(*
2	* Firebird Interface (fbintf). The fbintf components provide a set of
3	* Pascal language bindings for the Firebird API.
4	*
5	* The contents of this file are subject to the Initial Developer's
6	* Public License Version 1.0 (the "License"); you may not use this
7	* file except in compliance with the License. You may obtain a copy
8	* of the License here:
9	*
10	* http://www.firebirdsql.org/index.php?op=doc&id=idpl
11	*
12	* Software distributed under the License is distributed on an "AS
13	* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
14	* implied. See the License for the specific language governing rights
15	* and limitations under the License.
16	*
17	* The Initial Developer of the Original Code is Tony Whyman.
18	*
19	* The Original Code is (C) 2016 Tony Whyman, MWA Software
20	* (http://www.mwasoftware.co.uk).
21	*
22	* All Rights Reserved.
23	*
24	* Contributor(s): ______________________________________.
25	*
26	*)
27	unit FB30Array;
28	{$IFDEF MSWINDOWS}
29	{$DEFINE WINDOWS}
30	{$ENDIF}
31
32	{$IFDEF FPC}
33	{$mode delphi}
34	{$codepage UTF8}
35	{$interfaces COM}
36	{$ENDIF}
37
38	interface
39
40	uses
41	Classes, SysUtils, Firebird, IB, FBArray, IBHeader, FB30Attachment, FBClientAPI,
42	FB30Transaction, FBParamBlock, FB30ClientAPI;
43
44	type
45
46	ISDLItem = interface(IParameterBlockItem)
47	['{a34b6064-5ae9-4fc1-85c3-f145f069b607}']
48	procedure addByte(aValue: byte);
49	procedure addShortInt(aValue: ShortInt);
50	procedure addShortInteger(aValue: integer);
51	procedure SetAsShortInteger(aValue: integer);
52	procedure SetAsTinyInteger(aValue: integer);
53	end;
54
55	ISDL = interface(IParameterBlock<ISDLItem>)
56	['{52ae1f5f-657b-4b14-81aa-7b3658454f4c}']
57	end;
58
59	{ TFB30ArrayMetaData }
60
61	TFB30ArrayMetaData = class(TFBArrayMetaData,IArrayMetaData)
62	private
63	FCodePage: TSystemCodePage;
64	FCharSetWidth: integer;
65	protected
66	procedure LoadMetaData(aAttachment: IAttachment; aTransaction: ITransaction;
67	relationName, columnName: AnsiString); override;
68	public
69	function GetCharSetID: cardinal; override;
70	function GetCodePage: TSystemCodePage; override;
71	function GetCharSetWidth: integer; override;
72	end;
73
74	{ TFB30Array }
75
76	TFB30Array = class(TFBArray,IArray)
77	private
78	FAttachmentIntf: Firebird.IAttachment;
79	FTransactionIntf: Firebird.ITransaction;
80	FFirebird30ClientAPI: TFB30ClientAPI;
81	FSDL: ISDL;
82	procedure GenerateSDL;
83	protected
84	procedure AllocateBuffer; override;
85	procedure InternalGetSlice; override;
86	procedure InternalPutSlice(Force: boolean); override;
87	public
88	constructor Create(aAttachment: TFB30Attachment; aTransaction: TFB30Transaction; aField: IArrayMetaData); overload;
89	constructor Create(aAttachment: TFB30Attachment; aTransaction: TFB30Transaction; aField: IArrayMetaData; ArrayID: TISC_QUAD); overload;
90	end;
91
92	TSDLItem = class(TParamBlockItem,ISDLItem);
93
94	{ TSDLBlock }
95
96	TSDLBlock = class (TCustomParamBlock<TSDLItem,ISDLItem>, ISDL)
97	public
98	constructor Create(api: TFBClientAPI);
99	end;
100
101	implementation
102
103	uses FBAttachment, FB30Statement;
104
105	const
106	sGetArrayMetaData = 'Select F.RDB$FIELD_LENGTH, F.RDB$FIELD_SCALE, F.RDB$FIELD_TYPE, '+
107	'F.RDB$DIMENSIONS, FD.RDB$DIMENSION, FD.RDB$LOWER_BOUND, FD.RDB$UPPER_BOUND, '+
108	'F.RDB$CHARACTER_SET_ID '+
109	'From RDB$FIELDS F JOIN RDB$RELATION_FIELDS RF '+
110	'On F.RDB$FIELD_NAME = RF.RDB$FIELD_SOURCE JOIN RDB$FIELD_DIMENSIONS FD '+
111	'On FD.RDB$FIELD_NAME = F.RDB$FIELD_NAME ' +
112	'Where RF.RDB$RELATION_NAME = ? and RF.RDB$FIELD_NAME = ? ' +
113	'UNION '+
114	'Select F.RDB$FIELD_LENGTH, F.RDB$FIELD_SCALE, F.RDB$FIELD_TYPE, '+
115	'F.RDB$DIMENSIONS, FD.RDB$DIMENSION, FD.RDB$LOWER_BOUND, FD.RDB$UPPER_BOUND, '+
116	'F.RDB$CHARACTER_SET_ID '+
117	'From RDB$FIELDS F JOIN RDB$PROCEDURE_PARAMETERS PP '+
118	'On F.RDB$FIELD_NAME = PP.RDB$FIELD_SOURCE JOIN RDB$FIELD_DIMENSIONS FD '+
119	'On FD.RDB$FIELD_NAME = F.RDB$FIELD_NAME ' +
120	'Where PP.RDB$PROCEDURE_NAME = ? and PP.RDB$PARAMETER_NAME = ? '+
121	'Order by 5 asc';
122
123
124	{ TFB30ArrayMetaData }
125
126	{Assemble the array descriptor from the System Tables}
127
128	procedure TFB30ArrayMetaData.LoadMetaData(aAttachment: IAttachment;
129	aTransaction: ITransaction; relationName, columnName: AnsiString);
130	var stmt: IStatement;
131	CharWidth: integer;
132	begin
133	CharWidth := 0;
134	RelationName := AnsiUpperCase(RelationName);
135	ColumnName := AnsiUpperCase(ColumnName);
136	stmt := TFB30Statement.Create(aAttachment as TFB30Attachment,aTransaction,
137	sGetArrayMetaData ,aAttachment.GetSQLDialect);
138	with stmt do
139	begin
140	SQLParams[0].AsString := RelationName;
141	SQLParams[1].AsString := ColumnName;
142	SQLParams[2].AsString := RelationName;
143	SQLParams[3].AsString := ColumnName;
144	with OpenCursor do
145	if FetchNext then
146	begin
147	FillChar(FArrayDesc.array_desc_field_name,sizeof(FArrayDesc.array_desc_field_name),' ');
148	FillChar(FArrayDesc.array_desc_relation_name,sizeof(FArrayDesc.array_desc_relation_name),' ');
149	Move(columnName[1],FArrayDesc.array_desc_field_name,Length(columnName));
150	Move(relationName[1],FArrayDesc.array_desc_relation_name,length(relationName));
151	FArrayDesc.array_desc_length := Data[0].AsInteger;
152	FArrayDesc.array_desc_scale := Data[1].AsInteger;
153	FArrayDesc.array_desc_dtype := Data[2].AsInteger;
154	FArrayDesc.array_desc_dimensions := Data[3].AsInteger;
155	FArrayDesc.array_desc_flags := 0; {row major}
156	FCharSetID := Data[7].AsInteger;
157	if (FCharSetID > 1) and (aAttachment as TFB30Attachment).HasDefaultCharSet then
158	FCharSetID := (aAttachment as TFB30Attachment).CharSetID;
159	FCodePage := CP_NONE;
160	FAttachment.CharSetID2CodePage(FCharSetID,FCodePage);
161	FCharSetWidth := 1;
162	FAttachment.CharSetWidth(FCharSetID,FCharSetWidth);
163	if (FArrayDesc.array_desc_dtype in [blr_text,blr_cstring, blr_varying]) and
164	(FCharSetID = 0) then {This really shouldn't be necessary - but it is :(}
165	with aAttachment as TFBAttachment do
166	begin
167	if HasDefaultCharSet and FAttachment.CharSetWidth(CharSetID,CharWidth) then
168	FArrayDesc.array_desc_length := FArrayDesc.array_desc_length * CharWidth;
169	end;
170	repeat
171	with FArrayDesc.array_desc_bounds[Data[4].AsInteger] do
172	begin
173	array_bound_lower := Data[5].AsInteger;
174	array_bound_upper := Data[6].AsInteger;
175	end;
176	until not FetchNext;
177	end;
178	end;
179	end;
180
181	function TFB30ArrayMetaData.GetCharSetID: cardinal;
182	begin
183	Result := FCharSetID;
184	end;
185
186	function TFB30ArrayMetaData.GetCodePage: TSystemCodePage;
187	begin
188	Result := FCodePage;
189	end;
190
191	function TFB30ArrayMetaData.GetCharSetWidth: integer;
192	begin
193	Result := FCharSetWidth;
194	end;
195
196	{ TFB30Array }
197
198	procedure TFB30Array.GenerateSDL;
199
200	procedure AddVarInteger(aValue: integer);
201	begin
202	if (aValue >= -128) and (aValue <= 127) then
203	FSDL.Add(isc_sdl_tiny_integer).SetAsTinyInteger(aValue)
204	else
205	if (aValue >= -32768) and (aValue <= 32767) then
206	FSDL.Add(isc_sdl_short_integer).SetAsShortInteger(aValue)
207	else
208	FSDL.Add(isc_sdl_long_integer).SetAsInteger(aValue);
209	end;
210
211	var i: integer;
212	SDLItem: ISDLItem;
213	begin
214	FSDL := TSDLBlock.Create(FFirebird30ClientAPI);
215	with GetArrayDesc^ do
216	{The following is based on gen_SDL from Firebird src/dsql/array.cpp}
217	begin
218	SDLItem := FSDL.Add(isc_sdl_struct);
219	SDLItem.SetAsByte(array_desc_dtype);
220
221	case array_desc_dtype of
222	blr_short,blr_long,
223	blr_int64,blr_quad,
224	blr_int128:
225	SDLItem.AddShortInt(array_desc_scale);
226
227	blr_text,blr_cstring, blr_varying:
228	SDLItem.addShortInteger(array_desc_length);
229	end;
230
231	FSDL.Add(isc_sdl_relation).SetAsString(array_desc_relation_name);
232	FSDL.Add(isc_sdl_field).SetAsString(array_desc_field_name);
233
234	for i := 0 to array_desc_dimensions - 1 do
235	begin
236	if array_desc_bounds[i].array_bound_lower = 1 then
237	FSDL.Add(isc_sdl_do1).SetAsTinyInteger(i)
238	else
239	begin
240	FSDL.Add(isc_sdl_do2).SetAsTinyInteger(i);
241	AddVarInteger(array_desc_bounds[i].array_bound_lower);
242	end;
243	AddVarInteger(array_desc_bounds[i].array_bound_upper);
244	end;
245
246	SDLItem := FSDL.Add(isc_sdl_element);
247	SDLItem.AddByte(1);
248	SDLItem := FSDL.Add(isc_sdl_scalar);
249	SDLItem.AddByte(0);
250	SDLItem.AddByte(array_desc_dimensions);
251	for i := 0 to array_desc_dimensions - 1 do
252	begin
253	SDLItem := FSDL.Add(isc_sdl_variable);
254	SDLItem.AddByte(i);
255	end;
256	FSDL.Add(isc_sdl_eoc);
257	end;
258	end;
259
260	procedure TFB30Array.AllocateBuffer;
261
262	begin
263	inherited AllocateBuffer;
264	{Now set up the SDL}
265	GenerateSDL;
266	end;
267
268	procedure TFB30Array.InternalGetSlice;
269	begin
270	with FFirebird30ClientAPI do
271	begin
272	FAttachmentIntf.getSlice(StatusIntf,FTransactionIntf,
273	@FArrayID,
274	(FSDL as TSDLBlock).getDataLength,
275	BytePtr((FSDL as TSDLBlock).getBuffer),
276	0,nil,
277	FBufSize,BytePtr(FBuffer)
278	);
279	Check4DataBaseError;
280	end;
281	SignalActivity;
282	end;
283
284	procedure TFB30Array.InternalPutSlice(Force: boolean);
285	begin
286	with FFirebird30ClientAPI do
287	begin
288	FAttachmentIntf.putSlice(StatusIntf,FTransactionIntf, @FArrayID,
289	(FSDL as TSDLBlock).getDataLength,
290	BytePtr((FSDL as TSDLBlock).getBuffer),
291	0,nil,
292	FBufSize,BytePtr(FBuffer)
293	);
294	if not Force then
295	Check4DataBaseError;
296	end;
297	SignalActivity;
298	end;
299
300	constructor TFB30Array.Create(aAttachment: TFB30Attachment;
301	aTransaction: TFB30Transaction; aField: IArrayMetaData);
302	begin
303	inherited Create(aAttachment,aTransaction,aField);
304	FAttachmentIntf := aAttachment.AttachmentIntf;
305	FTransactionIntf := aTransaction.TransactionIntf;
306	FFirebird30ClientAPI := aAttachment.Firebird30ClientAPI;
307	end;
308
309	constructor TFB30Array.Create(aAttachment: TFB30Attachment;
310	aTransaction: TFB30Transaction; aField: IArrayMetaData; ArrayID: TISC_QUAD);
311	begin
312	inherited Create(aAttachment,aTransaction,aField,ArrayID);
313	FAttachmentIntf := aAttachment.AttachmentIntf;
314	FTransactionIntf := aTransaction.TransactionIntf;
315	FFirebird30ClientAPI := aAttachment.Firebird30ClientAPI;
316	end;
317
318	{ TSDLBlock }
319
320	constructor TSDLBlock.Create(api: TFBClientAPI);
321	begin
322	inherited Create(api);
323	FDataLength := 1;
324	FBuffer^ := isc_sdl_version1;
325	end;
326
327	end.
328