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 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, 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:	21
Committed:	Thu Feb 26 10:33:34 2015 UTC (9 years, 2 months ago) by tony
Content type:	text/x-pascal
File size:	14573 byte(s)
Log Message:	Committing updates for Release R1-2-0
#	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 BufferChunks;
114	property CachedUpdates;
115	property DataSource read GetDataSource write SetDataSource;
116	property GenerateParamNames;
117	// property Constraints stored ConstraintsStored;
118	property GeneratorField;
119	property ParamCheck;
120	property SQL: TStrings read FSQL write SetQuery;
121	property Params: TParams read FParams write SetParamsList;
122	property UniDirectional default False;
123	property UpdateObject;
124	property Filtered;
125
126	property BeforeDatabaseDisconnect;
127	property AfterDatabaseDisconnect;
128	property DatabaseFree;
129	property BeforeTransactionEnd;
130	property AfterTransactionEnd;
131	property TransactionFree;
132	property OnFilterRecord;
133	end;
134
135	implementation
136
137	{ TIBQuery }
138
139	constructor TIBQuery.Create(AOwner: TComponent);
140	begin
141	inherited Create(AOwner);
142	FSQL := TStringList.Create;
143	TStringList(SQL).OnChange := QueryChanged;
144	FParams := TParams.Create(Self);
145	ParamCheck := True;
146	FRowsAffected := -1;
147	end;
148
149	destructor TIBQuery.Destroy;
150	begin
151	Destroying;
152	Disconnect;
153	SQL.Free;
154	FParams.Free;
155	inherited Destroy;
156	end;
157
158	procedure TIBQuery.InitFieldDefs;
159	begin
160	inherited InitFieldDefs;
161	end;
162
163	procedure TIBQuery.InternalOpen;
164	begin
165	ActivateConnection();
166	ActivateTransaction;
167	QSelect.GenerateParamNames := GenerateParamNames;
168	SetPrepared(True);
169	if DataSource <> nil then
170	SetParamsFromCursor;
171	SetParams;
172	inherited InternalOpen;
173	end;
174
175	procedure TIBQuery.Disconnect;
176	begin
177	Close;
178	UnPrepare;
179	end;
180
181	procedure TIBQuery.SetPrepare(Value: Boolean);
182	begin
183	if Value then
184	Prepare
185	else
186	UnPrepare;
187	end;
188
189	procedure TIBQuery.Prepare;
190	begin
191	SetPrepared(True);
192	end;
193
194	procedure TIBQuery.UnPrepare;
195	begin
196	SetPrepared(False);
197	end;
198
199	procedure TIBQuery.SetQuery(Value: TStrings);
200	begin
201	if SQL.Text <> Value.Text then
202	begin
203	Disconnect;
204	SQL.BeginUpdate;
205	try
206	SQL.Assign(Value);
207	finally
208	SQL.EndUpdate;
209	end;
210	end;
211	end;
212
213	procedure TIBQuery.QueryChanged(Sender: TObject);
214	var
215	List: TParams;
216	begin
217	if not (csReading in ComponentState) then
218	begin
219	Disconnect;
220	if HasParser and not FSQLUpdating then
221	begin
222	FSQLUpdating := true;
223	try
224	SQL.Text := Parser.SQLText;
225	finally
226	FSQLUpdating := false
227	end;
228	end;
229	if ParamCheck or (csDesigning in ComponentState) then
230	begin
231	List := TParams.Create(Self);
232	try
233	FText := List.ParseSQL(SQL.Text, True);
234	List.AssignValues(FParams);
235	FParams.Clear;
236	FParams.Assign(List);
237	finally
238	List.Free;
239	end;
240	end else
241	FText := SQL.Text;
242	DataEvent(dePropertyChange, 0);
243	end else
244	FText := FParams.ParseSQL(SQL.Text, true);
245	SelectSQL.Assign(SQL);
246	end;
247
248	procedure TIBQuery.SetParamsList(Value: TParams);
249	begin
250	FParams.AssignValues(Value);
251	end;
252
253	function TIBQuery.GetParamsCount: Word;
254	begin
255	Result := FParams.Count;
256	end;
257
258	procedure TIBQuery.DefineProperties(Filer: TFiler);
259
260	function WriteData: Boolean;
261	begin
262	{The following results in a stream read error with nested frames. Hence commented out until
263	someone fixes the LCL }
264	{ if Filer.Ancestor <> nil then
265	Result := not FParams.IsEqual(TIBQuery(Filer.Ancestor).FParams) else}
266	Result := FParams.Count > 0;
267	end;
268
269	begin
270	inherited DefineProperties(Filer);
271	Filer.DefineProperty('ParamData', ReadParamData, WriteParamData, WriteData); {do not localize}
272	end;
273
274
275	procedure TIBQuery.ReadParamData(Reader: TReader);
276	begin
277	FParams.Clear;
278	Reader.ReadValue;
279	Reader.ReadCollection(FParams);
280	end;
281
282	procedure TIBQuery.WriteParamData(Writer: TWriter);
283	begin
284	Writer.WriteCollection(Params);
285	end;
286
287	procedure TIBQuery.SetPrepared(Value: Boolean);
288	begin
289	CheckDatasetClosed;
290	if Value <> Prepared then
291	begin
292	if Value then
293	begin
294	FRowsAffected := -1;
295	FCheckRowsAffected := True;
296	if Length(Text) > 1 then PrepareSQL(PChar(Text))
297	else IBError(ibxeEmptySQLStatement, [nil]);
298	end
299	else
300	begin
301	if FCheckRowsAffected then
302	FRowsAffected := RowsAffected;
303	InternalUnPrepare;
304	end;
305	FPrepared := Value;
306	end;
307	end;
308
309	procedure TIBQuery.SetParamsFromCursor;
310	var
311	I: Integer;
312	DataSet: TDataSet;
313	Field: TField;
314
315	procedure CheckRequiredParams;
316	var
317	I: Integer;
318	begin
319	for I := 0 to FParams.Count - 1 do
320	with FParams[I] do
321	if not Bound then
322	IBError(ibxeRequiredParamNotSet, [nil]);
323	end;
324
325	begin
326	if DataSource <> nil then
327	begin
328	DataSet := DataSource.DataSet;
329	if DataSet <> nil then
330	begin
331	DataSet.FieldDefs.Update;
332	for I := 0 to FParams.Count - 1 do
333	if not FParams[I].Bound then
334	begin
335	Field := DataSet.FindField(FParams[I].Name);
336	if assigned(Field) then
337	begin
338	FParams[I].AssignField(Field);
339	FParams[I].Bound := False;
340	end;
341	end;
342	end
343	else
344	CheckRequiredParams;
345	end
346	else
347	CheckRequiredParams;
348	end;
349
350
351	function TIBQuery.ParamByName(const Value: string): TParam;
352	begin
353	Result := FParams.ParamByName(Value);
354	end;
355
356	procedure TIBQuery.BatchInput(InputObject: TIBBatchInput);
357	begin
358	InternalBatchInput(InputObject);
359	end;
360
361	procedure TIBQuery.BatchOutput(OutputObject: TIBBatchOutput);
362	begin
363	InternalBatchOutput(OutputObject);
364	end;
365
366	procedure TIBQuery.ExecSQL;
367	var
368	DidActivate: Boolean;
369	begin
370	CheckInActive;
371	if SQL.Count <= 0 then
372	begin
373	FCheckRowsAffected := False;
374	IBError(ibxeEmptySQLStatement, [nil]);
375	end;
376	ActivateConnection();
377	DidActivate := ActivateTransaction;
378	try
379	SetPrepared(True);
380	if DataSource <> nil then SetParamsFromCursor;
381	if FParams.Count > 0 then SetParams;
382	InternalExecQuery;
383	finally
384	if DidActivate then
385	DeactivateTransaction;
386	FCheckRowsAffected := True;
387	end;
388	end;
389
390	procedure TIBQuery.SetParams;
391
392	var
393	i : integer;
394	Buffer: Pointer;
395	SQLParam: TIBXSQLVAR;
396
397	begin
398	for I := 0 to FParams.Count - 1 do
399	begin
400	SQLParam := SQLParams.ByName(Params[i].Name);
401	if Params[i].IsNull then
402	SQLParam.IsNull := True
403	else begin
404	SQLParam.IsNull := False;
405	case Params[i].DataType of
406	ftBytes:
407	begin
408	GetMem(Buffer,Params[i].GetDataSize);
409	try
410	Params[i].GetData(Buffer);
411	SQLParam.AsPointer := Buffer;
412	finally
413	FreeMem(Buffer);
414	end;
415	end;
416	ftString:
417	SQLParam.AsString := Params[i].AsString;
418	ftBoolean, ftSmallint, ftWord:
419	SQLParam.AsShort := Params[i].AsSmallInt;
420	ftInteger:
421	SQLParam.AsLong := Params[i].AsInteger;
422	ftLargeInt:
423	SQLParam.AsInt64 := Params[i].AsLargeInt;
424	ftFloat:
425	SQLParam.AsDouble := Params[i].AsFloat;
426	ftBCD, ftCurrency:
427	SQLParam.AsCurrency := Params[i].AsCurrency;
428	ftDate:
429	SQLParam.AsDate := Params[i].AsDateTime;
430	ftTime:
431	SQLParam.AsTime := Params[i].AsDateTime;
432	ftDateTime:
433	SQLParam.AsDateTime := Params[i].AsDateTime;
434	ftBlob, ftMemo:
435	SQLParam.AsString := Params[i].AsString;
436	else
437	IBError(ibxeNotSupported, [nil]);
438	end;
439	end;
440	end;
441	end;
442
443	procedure TIBQuery.PrepareSQL(Value: PChar);
444	begin
445	QSelect.GenerateParamNames := GenerateParamNames;
446	InternalPrepare;
447	end;
448
449
450	function TIBQuery.GetRowsAffected: Integer;
451	begin
452	Result := -1;
453	if Prepared then
454	Result := QSelect.RowsAffected
455	end;
456
457
458	procedure TIBQuery.GetDetailLinkFields(MasterFields, DetailFields: TList);
459
460	function AddFieldToList(const FieldName: string; DataSet: TDataSet;
461	List: TList): Boolean;
462	var
463	Field: TField;
464	begin
465	Field := DataSet.FindField(FieldName);
466	if (Field <> nil) then
467	List.Add(Field);
468	Result := Field <> nil;
469	end;
470
471	var
472	i: Integer;
473	begin
474	MasterFields.Clear;
475	DetailFields.Clear;
476	if (DataSource <> nil) and (DataSource.DataSet <> nil) then
477	for i := 0 to Params.Count - 1 do
478	if AddFieldToList(Params[i].Name, DataSource.DataSet, MasterFields) then
479	AddFieldToList(Params[i].Name, Self, DetailFields);
480	end;
481
482	function TIBQuery.GetStmtHandle: TISC_STMT_HANDLE;
483	begin
484	Result := SelectStmtHandle;
485	end;
486
487	function TIBQuery.CreateParser: TSelectSQLParser;
488	begin
489	Result := inherited CreateParser;
490	Result.OnSQLChanging := QueryChanged;
491	end;
492
493	function TIBQuery.GenerateQueryForLiveUpdate : Boolean;
494	begin
495	Result := False;
496	end;
497
498	procedure TIBQuery.SetFiltered(Value: Boolean);
499	begin
500	if(Filtered <> Value) then
501	begin
502	inherited SetFiltered(value);
503	if Active then
504	begin
505	Close;
506	Open;
507	end;
508	end
509	else
510	inherited SetFiltered(value);
511	end;
512
513	{ TIBQuery IProviderSupport }
514	(*
515	function TIBQuery.PSGetParams: TParams;
516	begin
517	Result := Params;
518	end;
519
520	procedure TIBQuery.PSSetParams(AParams: TParams);
521	begin
522	if AParams.Count <> 0 then
523	Params.Assign(AParams);
524	Close;
525	end;
526
527	function TIBQuery.PSGetTableName: string;
528	begin
529	Result := inherited PSGetTableName;
530	end;
531
532	procedure TIBQuery.PSExecute;
533	begin
534	ExecSQL;
535	end;
536
537	procedure TIBQuery.PSSetCommandText(const CommandText: string);
538	begin
539	if CommandText <> '' then
540	SQL.Text := CommandText;
541	end;
542	*)
543	end.
544