trunk/runtime/IBQuery.pas

{************************************************************************}
{                                                                        }
{       Borland Delphi Visual Component Library                          }
{       InterBase Express core components                                }
{                                                                        }
{       Copyright (c) 1998-2000 Inprise Corporation                      }
{                                                                        }
{    InterBase Express is based in part on the product                   }
{    Free IB Components, written by Gregory H. Deatz for                 }
{    Hoagland, Longo, Moran, Dunst & Doukas Company.                     }
{    Free IB Components is used under license.                           }
{                                                                        }
{    The contents of this file are subject to the InterBase              }
{    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 at http://www.Inprise.com/IPL.html }
{    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 Original Code was created by InterBase Software Corporation     }
{       and its successors.                                              }
{    Portions created by Inprise Corporation are Copyright (C) Inprise   }
{       Corporation. All Rights Reserved.                                }
{    Contributor(s): Jeff Overcash                                       }
{                                                                        }
{    IBX For Lazarus (Firebird Express)                                  }
{    Contributor: Tony Whyman, MWA Software http://www.mwasoftware.co.uk }
{    Portions created by MWA Software are copyright McCallum Whyman      }
{    Associates Ltd 2011                                                 }
{                                                                        }
{************************************************************************}

unit IBQuery;

interface

{$Mode Delphi}

uses
{$IFDEF WINDOWS }
  Windows,
{$ELSE}
  unix,
{$ENDIF}
 SysUtils, Graphics, Classes, Controls, Db,
     IBHeader, IB, IBCustomDataSet, IBSQL, IBSQLParser;

type

{ TIBQuery }

  TIBQuery = class(TIBParserDataSet)
  private
    FSQL: TStrings;
    FPrepared: Boolean;
    FParams: TParams;
    FText: string;
    FRowsAffected: Integer;
    FCheckRowsAffected: Boolean;
    FSQLUpdating: boolean;
    function GetRowsAffected: Integer;
    procedure PrepareSQL(Value: PChar);
    procedure QueryChanged(Sender: TObject);
    procedure ReadParamData(Reader: TReader);
    procedure SetQuery(Value: TStrings);
    procedure SetParamsList(Value: TParams);
    procedure SetParams;
    procedure SetParamsFromCursor;
    procedure SetPrepared(Value: Boolean);
    procedure SetPrepare(Value: Boolean);
    procedure WriteParamData(Writer: TWriter);
    function GetStmtHandle: TISC_STMT_HANDLE;

  protected
    { IProviderSupport }
(*    procedure PSExecute; override;
    function PSGetParams: TParams; override;
    function PSGetTableName: string; override;
    procedure PSSetCommandText(const CommandText: string); override;
    procedure PSSetParams(AParams: TParams); override;  *)

    function CreateParser: TSelectSQLParser; override;
    procedure DefineProperties(Filer: TFiler); override;
    procedure InitFieldDefs; override;
    procedure InternalOpen; override;
    procedure Disconnect; override;
    function GetParamsCount: Word;
    function GenerateQueryForLiveUpdate : Boolean;
    procedure SetFiltered(Value: Boolean); override;

  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    procedure BatchInput(InputObject: TIBBatchInput);
    procedure BatchOutput(OutputObject: TIBBatchOutput);
    procedure ExecSQL;
    procedure GetDetailLinkFields(MasterFields, DetailFields: TList);(* override;*)
    function ParamByName(const Value: string): TParam;
    procedure Prepare;
    procedure UnPrepare;
    property Prepared: Boolean read FPrepared write SetPrepare;
    property ParamCount: Word read GetParamsCount;
    property StmtHandle: TISC_STMT_HANDLE read GetStmtHandle;
    property StatementType;
    property Text: string read FText;
    property RowsAffected: Integer read GetRowsAffected;
 //   property Params: TParams read FParams write SetParamsList;
    property BaseSQLSelect;

  published
    property Active;
    property AutoCommit;
    property BufferChunks;
    property CachedUpdates;
    property DataSource read GetDataSource write SetDataSource;
    property GenerateParamNames;
 //   property Constraints stored ConstraintsStored;
    property GeneratorField;
    property ParamCheck;
    property SQL: TStrings read FSQL write SetQuery;
    property Params: TParams read FParams write SetParamsList;
    property UniDirectional default False;
    property UpdateObject;
    property Filtered;

    property BeforeDatabaseDisconnect;
    property AfterDatabaseDisconnect;
    property DatabaseFree;
    property BeforeTransactionEnd;
    property AfterTransactionEnd;
    property TransactionFree;
    property OnFilterRecord;
end;

implementation

{ TIBQuery }

constructor TIBQuery.Create(AOwner: TComponent);
begin
  inherited Create(AOwner);
  FSQL := TStringList.Create;
  TStringList(SQL).OnChange := QueryChanged;
  FParams := TParams.Create(Self);
  ParamCheck := True;
  FRowsAffected := -1;
end;

destructor TIBQuery.Destroy;
begin
  Destroying;
  Disconnect;
  SQL.Free;
  FParams.Free;
  inherited Destroy;
end;

procedure TIBQuery.InitFieldDefs;
begin
  inherited InitFieldDefs;
end;

procedure TIBQuery.InternalOpen;
begin
  ActivateConnection();
  ActivateTransaction;
  QSelect.GenerateParamNames := GenerateParamNames;
  SetPrepared(True);
  if DataSource <> nil then
    SetParamsFromCursor;
  SetParams;
  inherited InternalOpen;
end;

procedure TIBQuery.Disconnect;
begin
  Close;
  UnPrepare;
end;

procedure TIBQuery.SetPrepare(Value: Boolean);
begin
  if Value then
    Prepare
  else
    UnPrepare;
end;

procedure TIBQuery.Prepare;
begin
  SetPrepared(True);
end;

procedure TIBQuery.UnPrepare;
begin
  SetPrepared(False);
end;

procedure TIBQuery.SetQuery(Value: TStrings);
begin
  if SQL.Text <> Value.Text then
  begin
    Disconnect;
    SQL.BeginUpdate;
    try
      SQL.Assign(Value);
    finally
      SQL.EndUpdate;
    end;
  end;
end;

procedure TIBQuery.QueryChanged(Sender: TObject);
var
  List: TParams;
begin
  if not (csReading in ComponentState) then
  begin
    Disconnect;
    if HasParser and not FSQLUpdating then
    begin
      FSQLUpdating := true;
      try
        SQL.Text := Parser.SQLText;
      finally
        FSQLUpdating := false
      end;
    end;
    if ParamCheck or (csDesigning in ComponentState) then
    begin
      List := TParams.Create(Self);
      try
        FText := List.ParseSQL(SQL.Text, True);
        List.AssignValues(FParams);
        FParams.Clear;
        FParams.Assign(List);
      finally
        List.Free;
      end;
    end else
      FText := SQL.Text;
    DataEvent(dePropertyChange, 0);
  end else
    FText := FParams.ParseSQL(SQL.Text, true);
  SelectSQL.Assign(SQL);
end;

procedure TIBQuery.SetParamsList(Value: TParams);
begin
  FParams.AssignValues(Value);
end;

function TIBQuery.GetParamsCount: Word;
begin
  Result := FParams.Count;
end;

procedure TIBQuery.DefineProperties(Filer: TFiler);

  function WriteData: Boolean;
  begin
  {The following results in a stream read error with nested frames. Hence commented out until
   someone fixes the LCL }
{    if Filer.Ancestor <> nil then
      Result := not FParams.IsEqual(TIBQuery(Filer.Ancestor).FParams) else}
      Result := FParams.Count > 0;
  end;

begin
  inherited DefineProperties(Filer);
  Filer.DefineProperty('ParamData', ReadParamData, WriteParamData, WriteData); {do not localize}
end;


procedure TIBQuery.ReadParamData(Reader: TReader);
begin
  FParams.Clear;
  Reader.ReadValue;
  Reader.ReadCollection(FParams);
end;

procedure TIBQuery.WriteParamData(Writer: TWriter);
begin
  Writer.WriteCollection(Params);
end;

procedure TIBQuery.SetPrepared(Value: Boolean);
begin
  CheckDatasetClosed;
  if Value <> Prepared then
  begin
    if Value then
    begin
      FRowsAffected := -1;
      FCheckRowsAffected := True;
      if Length(Text) > 1 then PrepareSQL(PChar(Text))
      else IBError(ibxeEmptySQLStatement, [nil]);
    end
    else
    begin
      if FCheckRowsAffected then
        FRowsAffected := RowsAffected;
      InternalUnPrepare;
    end;
    FPrepared := Value;
  end;
end;

procedure TIBQuery.SetParamsFromCursor;
var
  I: Integer;
  DataSet: TDataSet;
  Field: TField;

  procedure CheckRequiredParams;
  var
    I: Integer;
  begin
    for I := 0 to FParams.Count - 1 do
    with FParams[I] do
      if not Bound then
        IBError(ibxeRequiredParamNotSet, [nil]);
  end;

begin
  if DataSource <> nil then
  begin
    DataSet := DataSource.DataSet;
    if DataSet <> nil then
    begin
      DataSet.FieldDefs.Update;
      for I := 0 to FParams.Count - 1 do
      if not FParams[I].Bound then
      begin
        Field := DataSet.FindField(FParams[I].Name);
        if assigned(Field) then
        begin
            FParams[I].AssignField(Field);
            FParams[I].Bound := False;
        end;
      end;
    end
    else
      CheckRequiredParams;
  end
  else
    CheckRequiredParams;
end;


function TIBQuery.ParamByName(const Value: string): TParam;
begin
  Result := FParams.ParamByName(Value);
end;

procedure TIBQuery.BatchInput(InputObject: TIBBatchInput);
begin
  InternalBatchInput(InputObject);
end;

procedure TIBQuery.BatchOutput(OutputObject: TIBBatchOutput);
begin
  InternalBatchOutput(OutputObject);
end;

procedure TIBQuery.ExecSQL;
var
  DidActivate: Boolean;
begin
  CheckInActive;
  if SQL.Count <= 0 then
  begin
    FCheckRowsAffected := False;
    IBError(ibxeEmptySQLStatement, [nil]);
  end;
  ActivateConnection();
  DidActivate := ActivateTransaction;
  try
    SetPrepared(True);
    if DataSource <> nil then SetParamsFromCursor;
    if FParams.Count > 0 then SetParams;
    InternalExecQuery;
  finally
    if DidActivate then
      DeactivateTransaction;
    FCheckRowsAffected := True;
  end;
end;

procedure TIBQuery.SetParams;

var
i : integer;
Buffer: Pointer;
SQLParam: TIBXSQLVAR;

begin
  for I := 0 to FParams.Count - 1 do
  begin
    SQLParam :=  SQLParams.ByName(Params[i].Name);
    if Params[i].IsNull then
      SQLParam.IsNull := True
    else begin
      SQLParam.IsNull := False;
      case Params[i].DataType of
        ftBytes:
        begin
          GetMem(Buffer,Params[i].GetDataSize);
          try
            Params[i].GetData(Buffer);
            SQLParam.AsPointer := Buffer;
          finally
            FreeMem(Buffer);
          end;
        end;
        ftString:
          SQLParam.AsString := Params[i].AsString;
        ftBoolean:
          SQLParam.AsBoolean := Params[i].AsBoolean;
        ftSmallint, ftWord:
          SQLParam.AsShort := Params[i].AsSmallInt;
        ftInteger:
          SQLParam.AsLong := Params[i].AsInteger;
        ftLargeInt:
          SQLParam.AsInt64 := Params[i].AsLargeInt;
        ftFloat:
         SQLParam.AsDouble := Params[i].AsFloat;
        ftBCD, ftCurrency:
          SQLParam.AsCurrency := Params[i].AsCurrency;
        ftDate:
          SQLParam.AsDate := Params[i].AsDateTime;
        ftTime:
          SQLParam.AsTime := Params[i].AsDateTime;
        ftDateTime:
          SQLParam.AsDateTime := Params[i].AsDateTime;
        ftBlob, ftMemo:
          SQLParam.AsString := Params[i].AsString;
        else
          IBError(ibxeNotSupported, [nil]);
      end;
    end;
  end;
end;

procedure TIBQuery.PrepareSQL(Value: PChar);
begin
  QSelect.GenerateParamNames := GenerateParamNames;
  InternalPrepare;
end;


function TIBQuery.GetRowsAffected: Integer;
begin
  Result := -1;
  if Prepared then
   Result := QSelect.RowsAffected
end;


procedure TIBQuery.GetDetailLinkFields(MasterFields, DetailFields: TList);

  function AddFieldToList(const FieldName: string; DataSet: TDataSet;
    List: TList): Boolean;
  var
    Field: TField;
  begin
    Field := DataSet.FindField(FieldName);
    if (Field <> nil) then
      List.Add(Field);
    Result := Field <> nil;
  end;

var
  i: Integer;
begin
  MasterFields.Clear;
  DetailFields.Clear;
  if (DataSource <> nil) and (DataSource.DataSet <> nil) then
    for i := 0 to Params.Count - 1 do
      if AddFieldToList(Params[i].Name, DataSource.DataSet, MasterFields) then
        AddFieldToList(Params[i].Name, Self, DetailFields);
end;

function TIBQuery.GetStmtHandle: TISC_STMT_HANDLE;
begin
  Result := SelectStmtHandle;
end;

function TIBQuery.CreateParser: TSelectSQLParser;
begin
  Result := inherited CreateParser;
  Result.OnSQLChanging := QueryChanged;
end;

function TIBQuery.GenerateQueryForLiveUpdate : Boolean;
begin
  Result := False;
end;

procedure TIBQuery.SetFiltered(Value: Boolean);
begin
  if(Filtered <> Value) then
  begin
    inherited SetFiltered(value);
    if Active then
    begin
      Close;
      Open;
    end;
  end
  else
    inherited SetFiltered(value);
end;

{ TIBQuery IProviderSupport }
 (*
function TIBQuery.PSGetParams: TParams;
begin
  Result := Params;
end;

procedure TIBQuery.PSSetParams(AParams: TParams);
begin
  if AParams.Count <> 0 then
    Params.Assign(AParams);
  Close;
end;

function TIBQuery.PSGetTableName: string;
begin
  Result := inherited PSGetTableName;
end;

procedure TIBQuery.PSExecute;
begin
  ExecSQL;
end;

procedure TIBQuery.PSSetCommandText(const CommandText: string);
begin
  if CommandText <> '' then
    SQL.Text := CommandText;
end;
 *)
end.

Revision:	23
Committed:	Fri Mar 13 10:26:52 2015 UTC (9 years, 8 months ago) by tony
Content type:	text/x-pascal
File size:	14663 byte(s)
Log Message:	Committing updates for Release R1-2-1
#	Content
1	{************************************************************************}
2	{ }
3	{ Borland Delphi Visual Component Library }
4	{ InterBase Express core components }
5	{ }
6	{ Copyright (c) 1998-2000 Inprise Corporation }
7	{ }
8	{ InterBase Express is based in part on the product }
9	{ Free IB Components, written by Gregory H. Deatz for }
10	{ Hoagland, Longo, Moran, Dunst & Doukas Company. }
11	{ Free IB Components is used under license. }
12	{ }
13	{ The contents of this file are subject to the InterBase }
14	{ Public License Version 1.0 (the "License"); you may not }
15	{ use this file except in compliance with the License. You }
16	{ may obtain a copy of the License at http://www.Inprise.com/IPL.html }
17	{ Software distributed under the License is distributed on }
18	{ an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either }
19	{ express or implied. See the License for the specific language }
20	{ governing rights and limitations under the License. }
21	{ The Original Code was created by InterBase Software Corporation }
22	{ and its successors. }
23	{ Portions created by Inprise Corporation are Copyright (C) Inprise }
24	{ Corporation. All Rights Reserved. }
25	{ Contributor(s): Jeff Overcash }
26	{ }
27	{ IBX For Lazarus (Firebird Express) }
28	{ Contributor: Tony Whyman, MWA Software http://www.mwasoftware.co.uk }
29	{ Portions created by MWA Software are copyright McCallum Whyman }
30	{ Associates Ltd 2011 }
31	{ }
32	{************************************************************************}
33
34	unit IBQuery;
35
36	interface
37
38	{$Mode Delphi}
39
40	uses
41	{$IFDEF WINDOWS }
42	Windows,
43	{$ELSE}
44	unix,
45	{$ENDIF}
46	SysUtils, Graphics, Classes, Controls, Db,
47	IBHeader, IB, IBCustomDataSet, IBSQL, IBSQLParser;
48
49	type
50
51	{ TIBQuery }
52
53	TIBQuery = class(TIBParserDataSet)
54	private
55	FSQL: TStrings;
56	FPrepared: Boolean;
57	FParams: TParams;
58	FText: string;
59	FRowsAffected: Integer;
60	FCheckRowsAffected: Boolean;
61	FSQLUpdating: boolean;
62	function GetRowsAffected: Integer;
63	procedure PrepareSQL(Value: PChar);
64	procedure QueryChanged(Sender: TObject);
65	procedure ReadParamData(Reader: TReader);
66	procedure SetQuery(Value: TStrings);
67	procedure SetParamsList(Value: TParams);
68	procedure SetParams;
69	procedure SetParamsFromCursor;
70	procedure SetPrepared(Value: Boolean);
71	procedure SetPrepare(Value: Boolean);
72	procedure WriteParamData(Writer: TWriter);
73	function GetStmtHandle: TISC_STMT_HANDLE;
74
75	protected
76	{ IProviderSupport }
77	(* procedure PSExecute; override;
78	function PSGetParams: TParams; override;
79	function PSGetTableName: string; override;
80	procedure PSSetCommandText(const CommandText: string); override;
81	procedure PSSetParams(AParams: TParams); override; *)
82
83	function CreateParser: TSelectSQLParser; override;
84	procedure DefineProperties(Filer: TFiler); override;
85	procedure InitFieldDefs; override;
86	procedure InternalOpen; override;
87	procedure Disconnect; override;
88	function GetParamsCount: Word;
89	function GenerateQueryForLiveUpdate : Boolean;
90	procedure SetFiltered(Value: Boolean); override;
91
92	public
93	constructor Create(AOwner: TComponent); override;
94	destructor Destroy; override;
95	procedure BatchInput(InputObject: TIBBatchInput);
96	procedure BatchOutput(OutputObject: TIBBatchOutput);
97	procedure ExecSQL;
98	procedure GetDetailLinkFields(MasterFields, DetailFields: TList);(* override;*)
99	function ParamByName(const Value: string): TParam;
100	procedure Prepare;
101	procedure UnPrepare;
102	property Prepared: Boolean read FPrepared write SetPrepare;
103	property ParamCount: Word read GetParamsCount;
104	property StmtHandle: TISC_STMT_HANDLE read GetStmtHandle;
105	property StatementType;
106	property Text: string read FText;
107	property RowsAffected: Integer read GetRowsAffected;
108	// property Params: TParams read FParams write SetParamsList;
109	property BaseSQLSelect;
110
111	published
112	property Active;
113	property AutoCommit;
114	property BufferChunks;
115	property CachedUpdates;
116	property DataSource read GetDataSource write SetDataSource;
117	property GenerateParamNames;
118	// property Constraints stored ConstraintsStored;
119	property GeneratorField;
120	property ParamCheck;
121	property SQL: TStrings read FSQL write SetQuery;
122	property Params: TParams read FParams write SetParamsList;
123	property UniDirectional default False;
124	property UpdateObject;
125	property Filtered;
126
127	property BeforeDatabaseDisconnect;
128	property AfterDatabaseDisconnect;
129	property DatabaseFree;
130	property BeforeTransactionEnd;
131	property AfterTransactionEnd;
132	property TransactionFree;
133	property OnFilterRecord;
134	end;
135
136	implementation
137
138	{ TIBQuery }
139
140	constructor TIBQuery.Create(AOwner: TComponent);
141	begin
142	inherited Create(AOwner);
143	FSQL := TStringList.Create;
144	TStringList(SQL).OnChange := QueryChanged;
145	FParams := TParams.Create(Self);
146	ParamCheck := True;
147	FRowsAffected := -1;
148	end;
149
150	destructor TIBQuery.Destroy;
151	begin
152	Destroying;
153	Disconnect;
154	SQL.Free;
155	FParams.Free;
156	inherited Destroy;
157	end;
158
159	procedure TIBQuery.InitFieldDefs;
160	begin
161	inherited InitFieldDefs;
162	end;
163
164	procedure TIBQuery.InternalOpen;
165	begin
166	ActivateConnection();
167	ActivateTransaction;
168	QSelect.GenerateParamNames := GenerateParamNames;
169	SetPrepared(True);
170	if DataSource <> nil then
171	SetParamsFromCursor;
172	SetParams;
173	inherited InternalOpen;
174	end;
175
176	procedure TIBQuery.Disconnect;
177	begin
178	Close;
179	UnPrepare;
180	end;
181
182	procedure TIBQuery.SetPrepare(Value: Boolean);
183	begin
184	if Value then
185	Prepare
186	else
187	UnPrepare;
188	end;
189
190	procedure TIBQuery.Prepare;
191	begin
192	SetPrepared(True);
193	end;
194
195	procedure TIBQuery.UnPrepare;
196	begin
197	SetPrepared(False);
198	end;
199
200	procedure TIBQuery.SetQuery(Value: TStrings);
201	begin
202	if SQL.Text <> Value.Text then
203	begin
204	Disconnect;
205	SQL.BeginUpdate;
206	try
207	SQL.Assign(Value);
208	finally
209	SQL.EndUpdate;
210	end;
211	end;
212	end;
213
214	procedure TIBQuery.QueryChanged(Sender: TObject);
215	var
216	List: TParams;
217	begin
218	if not (csReading in ComponentState) then
219	begin
220	Disconnect;
221	if HasParser and not FSQLUpdating then
222	begin
223	FSQLUpdating := true;
224	try
225	SQL.Text := Parser.SQLText;
226	finally
227	FSQLUpdating := false
228	end;
229	end;
230	if ParamCheck or (csDesigning in ComponentState) then
231	begin
232	List := TParams.Create(Self);
233	try
234	FText := List.ParseSQL(SQL.Text, True);
235	List.AssignValues(FParams);
236	FParams.Clear;
237	FParams.Assign(List);
238	finally
239	List.Free;
240	end;
241	end else
242	FText := SQL.Text;
243	DataEvent(dePropertyChange, 0);
244	end else
245	FText := FParams.ParseSQL(SQL.Text, true);
246	SelectSQL.Assign(SQL);
247	end;
248
249	procedure TIBQuery.SetParamsList(Value: TParams);
250	begin
251	FParams.AssignValues(Value);
252	end;
253
254	function TIBQuery.GetParamsCount: Word;
255	begin
256	Result := FParams.Count;
257	end;
258
259	procedure TIBQuery.DefineProperties(Filer: TFiler);
260
261	function WriteData: Boolean;
262	begin
263	{The following results in a stream read error with nested frames. Hence commented out until
264	someone fixes the LCL }
265	{ if Filer.Ancestor <> nil then
266	Result := not FParams.IsEqual(TIBQuery(Filer.Ancestor).FParams) else}
267	Result := FParams.Count > 0;
268	end;
269
270	begin
271	inherited DefineProperties(Filer);
272	Filer.DefineProperty('ParamData', ReadParamData, WriteParamData, WriteData); {do not localize}
273	end;
274
275
276	procedure TIBQuery.ReadParamData(Reader: TReader);
277	begin
278	FParams.Clear;
279	Reader.ReadValue;
280	Reader.ReadCollection(FParams);
281	end;
282
283	procedure TIBQuery.WriteParamData(Writer: TWriter);
284	begin
285	Writer.WriteCollection(Params);
286	end;
287
288	procedure TIBQuery.SetPrepared(Value: Boolean);
289	begin
290	CheckDatasetClosed;
291	if Value <> Prepared then
292	begin
293	if Value then
294	begin
295	FRowsAffected := -1;
296	FCheckRowsAffected := True;
297	if Length(Text) > 1 then PrepareSQL(PChar(Text))
298	else IBError(ibxeEmptySQLStatement, [nil]);
299	end
300	else
301	begin
302	if FCheckRowsAffected then
303	FRowsAffected := RowsAffected;
304	InternalUnPrepare;
305	end;
306	FPrepared := Value;
307	end;
308	end;
309
310	procedure TIBQuery.SetParamsFromCursor;
311	var
312	I: Integer;
313	DataSet: TDataSet;
314	Field: TField;
315
316	procedure CheckRequiredParams;
317	var
318	I: Integer;
319	begin
320	for I := 0 to FParams.Count - 1 do
321	with FParams[I] do
322	if not Bound then
323	IBError(ibxeRequiredParamNotSet, [nil]);
324	end;
325
326	begin
327	if DataSource <> nil then
328	begin
329	DataSet := DataSource.DataSet;
330	if DataSet <> nil then
331	begin
332	DataSet.FieldDefs.Update;
333	for I := 0 to FParams.Count - 1 do
334	if not FParams[I].Bound then
335	begin
336	Field := DataSet.FindField(FParams[I].Name);
337	if assigned(Field) then
338	begin
339	FParams[I].AssignField(Field);
340	FParams[I].Bound := False;
341	end;
342	end;
343	end
344	else
345	CheckRequiredParams;
346	end
347	else
348	CheckRequiredParams;
349	end;
350
351
352	function TIBQuery.ParamByName(const Value: string): TParam;
353	begin
354	Result := FParams.ParamByName(Value);
355	end;
356
357	procedure TIBQuery.BatchInput(InputObject: TIBBatchInput);
358	begin
359	InternalBatchInput(InputObject);
360	end;
361
362	procedure TIBQuery.BatchOutput(OutputObject: TIBBatchOutput);
363	begin
364	InternalBatchOutput(OutputObject);
365	end;
366
367	procedure TIBQuery.ExecSQL;
368	var
369	DidActivate: Boolean;
370	begin
371	CheckInActive;
372	if SQL.Count <= 0 then
373	begin
374	FCheckRowsAffected := False;
375	IBError(ibxeEmptySQLStatement, [nil]);
376	end;
377	ActivateConnection();
378	DidActivate := ActivateTransaction;
379	try
380	SetPrepared(True);
381	if DataSource <> nil then SetParamsFromCursor;
382	if FParams.Count > 0 then SetParams;
383	InternalExecQuery;
384	finally
385	if DidActivate then
386	DeactivateTransaction;
387	FCheckRowsAffected := True;
388	end;
389	end;
390
391	procedure TIBQuery.SetParams;
392
393	var
394	i : integer;
395	Buffer: Pointer;
396	SQLParam: TIBXSQLVAR;
397
398	begin
399	for I := 0 to FParams.Count - 1 do
400	begin
401	SQLParam := SQLParams.ByName(Params[i].Name);
402	if Params[i].IsNull then
403	SQLParam.IsNull := True
404	else begin
405	SQLParam.IsNull := False;
406	case Params[i].DataType of
407	ftBytes:
408	begin
409	GetMem(Buffer,Params[i].GetDataSize);
410	try
411	Params[i].GetData(Buffer);
412	SQLParam.AsPointer := Buffer;
413	finally
414	FreeMem(Buffer);
415	end;
416	end;
417	ftString:
418	SQLParam.AsString := Params[i].AsString;
419	ftBoolean:
420	SQLParam.AsBoolean := Params[i].AsBoolean;
421	ftSmallint, ftWord:
422	SQLParam.AsShort := Params[i].AsSmallInt;
423	ftInteger:
424	SQLParam.AsLong := Params[i].AsInteger;
425	ftLargeInt:
426	SQLParam.AsInt64 := Params[i].AsLargeInt;
427	ftFloat:
428	SQLParam.AsDouble := Params[i].AsFloat;
429	ftBCD, ftCurrency:
430	SQLParam.AsCurrency := Params[i].AsCurrency;
431	ftDate:
432	SQLParam.AsDate := Params[i].AsDateTime;
433	ftTime:
434	SQLParam.AsTime := Params[i].AsDateTime;
435	ftDateTime:
436	SQLParam.AsDateTime := Params[i].AsDateTime;
437	ftBlob, ftMemo:
438	SQLParam.AsString := Params[i].AsString;
439	else
440	IBError(ibxeNotSupported, [nil]);
441	end;
442	end;
443	end;
444	end;
445
446	procedure TIBQuery.PrepareSQL(Value: PChar);
447	begin
448	QSelect.GenerateParamNames := GenerateParamNames;
449	InternalPrepare;
450	end;
451
452
453	function TIBQuery.GetRowsAffected: Integer;
454	begin
455	Result := -1;
456	if Prepared then
457	Result := QSelect.RowsAffected
458	end;
459
460
461	procedure TIBQuery.GetDetailLinkFields(MasterFields, DetailFields: TList);
462
463	function AddFieldToList(const FieldName: string; DataSet: TDataSet;
464	List: TList): Boolean;
465	var
466	Field: TField;
467	begin
468	Field := DataSet.FindField(FieldName);
469	if (Field <> nil) then
470	List.Add(Field);
471	Result := Field <> nil;
472	end;
473
474	var
475	i: Integer;
476	begin
477	MasterFields.Clear;
478	DetailFields.Clear;
479	if (DataSource <> nil) and (DataSource.DataSet <> nil) then
480	for i := 0 to Params.Count - 1 do
481	if AddFieldToList(Params[i].Name, DataSource.DataSet, MasterFields) then
482	AddFieldToList(Params[i].Name, Self, DetailFields);
483	end;
484
485	function TIBQuery.GetStmtHandle: TISC_STMT_HANDLE;
486	begin
487	Result := SelectStmtHandle;
488	end;
489
490	function TIBQuery.CreateParser: TSelectSQLParser;
491	begin
492	Result := inherited CreateParser;
493	Result.OnSQLChanging := QueryChanged;
494	end;
495
496	function TIBQuery.GenerateQueryForLiveUpdate : Boolean;
497	begin
498	Result := False;
499	end;
500
501	procedure TIBQuery.SetFiltered(Value: Boolean);
502	begin
503	if(Filtered <> Value) then
504	begin
505	inherited SetFiltered(value);
506	if Active then
507	begin
508	Close;
509	Open;
510	end;
511	end
512	else
513	inherited SetFiltered(value);
514	end;
515
516	{ TIBQuery IProviderSupport }
517	(*
518	function TIBQuery.PSGetParams: TParams;
519	begin
520	Result := Params;
521	end;
522
523	procedure TIBQuery.PSSetParams(AParams: TParams);
524	begin
525	if AParams.Count <> 0 then
526	Params.Assign(AParams);
527	Close;
528	end;
529
530	function TIBQuery.PSGetTableName: string;
531	begin
532	Result := inherited PSGetTableName;
533	end;
534
535	procedure TIBQuery.PSExecute;
536	begin
537	ExecSQL;
538	end;
539
540	procedure TIBQuery.PSSetCommandText(const CommandText: string);
541	begin
542	if CommandText <> '' then
543	SQL.Text := CommandText;
544	end;
545	*)
546	end.
547