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;
    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 DataSetCloseAction;

    property BeforeDatabaseDisconnect;
    property AfterDatabaseDisconnect;
    property DatabaseFree;
    property BeforeTransactionEnd;
    property AfterTransactionEnd;
    property TransactionFree;
    property OnFilterRecord;
    property OnValidatePost;
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
      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, [FParams[I].Name]);
  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;
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:	27
Committed:	Tue Apr 14 13:10:23 2015 UTC (9 years, 7 months ago) by tony
Content type:	text/x-pascal
File size:	14698 byte(s)
Log Message:	Committing updates for Release R1-2-3
#	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;
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	property DataSetCloseAction;
127
128	property BeforeDatabaseDisconnect;
129	property AfterDatabaseDisconnect;
130	property DatabaseFree;
131	property BeforeTransactionEnd;
132	property AfterTransactionEnd;
133	property TransactionFree;
134	property OnFilterRecord;
135	property OnValidatePost;
136	end;
137
138	implementation
139
140	{ TIBQuery }
141
142	constructor TIBQuery.Create(AOwner: TComponent);
143	begin
144	inherited Create(AOwner);
145	FSQL := TStringList.Create;
146	TStringList(SQL).OnChange := QueryChanged;
147	FParams := TParams.Create(Self);
148	ParamCheck := True;
149	FRowsAffected := -1;
150	end;
151
152	destructor TIBQuery.Destroy;
153	begin
154	Destroying;
155	Disconnect;
156	SQL.Free;
157	FParams.Free;
158	inherited Destroy;
159	end;
160
161	procedure TIBQuery.InitFieldDefs;
162	begin
163	inherited InitFieldDefs;
164	end;
165
166	procedure TIBQuery.InternalOpen;
167	begin
168	ActivateConnection();
169	ActivateTransaction;
170	QSelect.GenerateParamNames := GenerateParamNames;
171	SetPrepared(True);
172	if DataSource <> nil then
173	SetParamsFromCursor;
174	SetParams;
175	inherited InternalOpen;
176	end;
177
178	procedure TIBQuery.Disconnect;
179	begin
180	Close;
181	UnPrepare;
182	end;
183
184	procedure TIBQuery.SetPrepare(Value: Boolean);
185	begin
186	if Value then
187	Prepare
188	else
189	UnPrepare;
190	end;
191
192	procedure TIBQuery.Prepare;
193	begin
194	SetPrepared(True);
195	end;
196
197	procedure TIBQuery.UnPrepare;
198	begin
199	SetPrepared(False);
200	end;
201
202	procedure TIBQuery.SetQuery(Value: TStrings);
203	begin
204	if SQL.Text <> Value.Text then
205	begin
206	Disconnect;
207	SQL.BeginUpdate;
208	try
209	SQL.Assign(Value);
210	finally
211	SQL.EndUpdate;
212	end;
213	end;
214	end;
215
216	procedure TIBQuery.QueryChanged(Sender: TObject);
217	var
218	List: TParams;
219	begin
220	if not (csReading in ComponentState) then
221	begin
222	Disconnect;
223	if HasParser and not FSQLUpdating then
224	begin
225	FSQLUpdating := true;
226	try
227	SQL.Text := Parser.SQLText;
228	finally
229	FSQLUpdating := false
230	end;
231	end;
232	if ParamCheck or (csDesigning in ComponentState) then
233	begin
234	List := TParams.Create(Self);
235	try
236	FText := List.ParseSQL(SQL.Text, True);
237	List.AssignValues(FParams);
238	FParams.Clear;
239	FParams.Assign(List);
240	finally
241	List.Free;
242	end;
243	end else
244	FText := SQL.Text;
245	DataEvent(dePropertyChange, 0);
246	end else
247	FText := FParams.ParseSQL(SQL.Text, true);
248	SelectSQL.Assign(SQL);
249	end;
250
251	procedure TIBQuery.SetParamsList(Value: TParams);
252	begin
253	FParams.AssignValues(Value);
254	end;
255
256	function TIBQuery.GetParamsCount: Word;
257	begin
258	Result := FParams.Count;
259	end;
260
261	procedure TIBQuery.DefineProperties(Filer: TFiler);
262
263	function WriteData: Boolean;
264	begin
265	{The following results in a stream read error with nested frames. Hence commented out until
266	someone fixes the LCL }
267	{ if Filer.Ancestor <> nil then
268	Result := not FParams.IsEqual(TIBQuery(Filer.Ancestor).FParams) else}
269	Result := FParams.Count > 0;
270	end;
271
272	begin
273	inherited DefineProperties(Filer);
274	Filer.DefineProperty('ParamData', ReadParamData, WriteParamData, WriteData); {do not localize}
275	end;
276
277
278	procedure TIBQuery.ReadParamData(Reader: TReader);
279	begin
280	FParams.Clear;
281	Reader.ReadValue;
282	Reader.ReadCollection(FParams);
283	end;
284
285	procedure TIBQuery.WriteParamData(Writer: TWriter);
286	begin
287	Writer.WriteCollection(Params);
288	end;
289
290	procedure TIBQuery.SetPrepared(Value: Boolean);
291	begin
292	CheckDatasetClosed;
293	if Value <> Prepared then
294	begin
295	if Value then
296	begin
297	FRowsAffected := -1;
298	FCheckRowsAffected := True;
299	if Length(Text) > 1 then PrepareSQL
300	else IBError(ibxeEmptySQLStatement, [nil]);
301	end
302	else
303	begin
304	if FCheckRowsAffected then
305	FRowsAffected := RowsAffected;
306	InternalUnPrepare;
307	end;
308	FPrepared := Value;
309	end;
310	end;
311
312	procedure TIBQuery.SetParamsFromCursor;
313	var
314	I: Integer;
315	DataSet: TDataSet;
316	Field: TField;
317
318	procedure CheckRequiredParams;
319	var
320	I: Integer;
321	begin
322	for I := 0 to FParams.Count - 1 do
323	with FParams[I] do
324	if not Bound then
325	IBError(ibxeRequiredParamNotSet, [FParams[I].Name]);
326	end;
327
328	begin
329	if DataSource <> nil then
330	begin
331	DataSet := DataSource.DataSet;
332	if DataSet <> nil then
333	begin
334	DataSet.FieldDefs.Update;
335	for I := 0 to FParams.Count - 1 do
336	if not FParams[I].Bound then
337	begin
338	Field := DataSet.FindField(FParams[I].Name);
339	if assigned(Field) then
340	begin
341	FParams[I].AssignField(Field);
342	FParams[I].Bound := False;
343	end;
344	end;
345	end
346	else
347	CheckRequiredParams;
348	end
349	else
350	CheckRequiredParams;
351	end;
352
353
354	function TIBQuery.ParamByName(const Value: string): TParam;
355	begin
356	Result := FParams.ParamByName(Value);
357	end;
358
359	procedure TIBQuery.BatchInput(InputObject: TIBBatchInput);
360	begin
361	InternalBatchInput(InputObject);
362	end;
363
364	procedure TIBQuery.BatchOutput(OutputObject: TIBBatchOutput);
365	begin
366	InternalBatchOutput(OutputObject);
367	end;
368
369	procedure TIBQuery.ExecSQL;
370	var
371	DidActivate: Boolean;
372	begin
373	CheckInActive;
374	if SQL.Count <= 0 then
375	begin
376	FCheckRowsAffected := False;
377	IBError(ibxeEmptySQLStatement, [nil]);
378	end;
379	ActivateConnection();
380	DidActivate := ActivateTransaction;
381	try
382	SetPrepared(True);
383	if DataSource <> nil then SetParamsFromCursor;
384	if FParams.Count > 0 then SetParams;
385	InternalExecQuery;
386	finally
387	if DidActivate then
388	DeactivateTransaction;
389	FCheckRowsAffected := True;
390	end;
391	end;
392
393	procedure TIBQuery.SetParams;
394
395	var
396	i : integer;
397	Buffer: Pointer;
398	SQLParam: TIBXSQLVAR;
399
400	begin
401	for I := 0 to FParams.Count - 1 do
402	begin
403	SQLParam := SQLParams.ByName(Params[i].Name);
404	if Params[i].IsNull then
405	SQLParam.IsNull := True
406	else begin
407	SQLParam.IsNull := False;
408	case Params[i].DataType of
409	ftBytes:
410	begin
411	GetMem(Buffer,Params[i].GetDataSize);
412	try
413	Params[i].GetData(Buffer);
414	SQLParam.AsPointer := Buffer;
415	finally
416	FreeMem(Buffer);
417	end;
418	end;
419	ftString:
420	SQLParam.AsString := Params[i].AsString;
421	ftBoolean:
422	SQLParam.AsBoolean := Params[i].AsBoolean;
423	ftSmallint, ftWord:
424	SQLParam.AsShort := Params[i].AsSmallInt;
425	ftInteger:
426	SQLParam.AsLong := Params[i].AsInteger;
427	ftLargeInt:
428	SQLParam.AsInt64 := Params[i].AsLargeInt;
429	ftFloat:
430	SQLParam.AsDouble := Params[i].AsFloat;
431	ftBCD, ftCurrency:
432	SQLParam.AsCurrency := Params[i].AsCurrency;
433	ftDate:
434	SQLParam.AsDate := Params[i].AsDateTime;
435	ftTime:
436	SQLParam.AsTime := Params[i].AsDateTime;
437	ftDateTime:
438	SQLParam.AsDateTime := Params[i].AsDateTime;
439	ftBlob, ftMemo:
440	SQLParam.AsString := Params[i].AsString;
441	else
442	IBError(ibxeNotSupported, [nil]);
443	end;
444	end;
445	end;
446	end;
447
448	procedure TIBQuery.PrepareSQL;
449	begin
450	QSelect.GenerateParamNames := GenerateParamNames;
451	InternalPrepare;
452	end;
453
454
455	function TIBQuery.GetRowsAffected: Integer;
456	begin
457	Result := -1;
458	if Prepared then
459	Result := QSelect.RowsAffected
460	end;
461
462
463	procedure TIBQuery.GetDetailLinkFields(MasterFields, DetailFields: TList);
464
465	function AddFieldToList(const FieldName: string; DataSet: TDataSet;
466	List: TList): Boolean;
467	var
468	Field: TField;
469	begin
470	Field := DataSet.FindField(FieldName);
471	if (Field <> nil) then
472	List.Add(Field);
473	Result := Field <> nil;
474	end;
475
476	var
477	i: Integer;
478	begin
479	MasterFields.Clear;
480	DetailFields.Clear;
481	if (DataSource <> nil) and (DataSource.DataSet <> nil) then
482	for i := 0 to Params.Count - 1 do
483	if AddFieldToList(Params[i].Name, DataSource.DataSet, MasterFields) then
484	AddFieldToList(Params[i].Name, Self, DetailFields);
485	end;
486
487	function TIBQuery.GetStmtHandle: TISC_STMT_HANDLE;
488	begin
489	Result := SelectStmtHandle;
490	end;
491
492	function TIBQuery.CreateParser: TSelectSQLParser;
493	begin
494	Result := inherited CreateParser;
495	Result.OnSQLChanging := QueryChanged;
496	end;
497
498	function TIBQuery.GenerateQueryForLiveUpdate : Boolean;
499	begin
500	Result := False;
501	end;
502
503	procedure TIBQuery.SetFiltered(Value: Boolean);
504	begin
505	if(Filtered <> Value) then
506	begin
507	inherited SetFiltered(value);
508	if Active then
509	begin
510	Close;
511	Open;
512	end;
513	end
514	else
515	inherited SetFiltered(value);
516	end;
517
518	{ TIBQuery IProviderSupport }
519	(*
520	function TIBQuery.PSGetParams: TParams;
521	begin
522	Result := Params;
523	end;
524
525	procedure TIBQuery.PSSetParams(AParams: TParams);
526	begin
527	if AParams.Count <> 0 then
528	Params.Assign(AParams);
529	Close;
530	end;
531
532	function TIBQuery.PSGetTableName: string;
533	begin
534	Result := inherited PSGetTableName;
535	end;
536
537	procedure TIBQuery.PSExecute;
538	begin
539	ExecSQL;
540	end;
541
542	procedure TIBQuery.PSSetCommandText(const CommandText: string);
543	begin
544	if CommandText <> '' then
545	SQL.Text := CommandText;
546	end;
547	*)
548	end.
549