runtime/nongui/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 - 2018                                               }
{                                                                        }
{************************************************************************}

unit IBQuery;

interface

{$Mode Delphi}

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

type

{ TIBQuery }

  TIBQuery = class(TIBParserDataSet)
  private
    FSQL: TStrings;
    FPrepared: Boolean;
    FParams: TParams;
    FText: string;
    FSQLUpdating: boolean;
    FInQueryChanged: boolean;
    function GetRowsAffected: Integer;
    function ParseSQL(ParamList: TParams; SQL: string; DoClear: boolean): string;
    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: IStatement;
    procedure UpdateSQL;

  protected
    { IProviderSupport }
(*    procedure PSExecute; override;
    function PSGetParams: TParams; override;
    function PSGetTableName: string; override;
    procedure PSSetCommandText(const CommandText: string); override;
    procedure PSSetParams(AParams: TParams); 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;
    procedure SQLChanged(Sender: TObject); override;
    procedure SQLChanging(Sender: TObject); 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;
    procedure ResetParser; override;
    property Prepared: Boolean read FPrepared write SetPrepare;
    property ParamCount: Word read GetParamsCount;
    property StmtHandle: IStatement 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 CaseSensitiveParameterNames;
    property DataSource read GetDataSource write SetDataSource;
    property EnableStatistics;
    property GenerateParamNames;
 //   property Constraints stored ConstraintsStored;
    property GeneratorField;
    property MasterDetailDelay;
    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 Filter;
    property SQLFiltered;
    property SQLFilterParams;
    property DataSetCloseAction;

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

implementation

uses IBMessages, IBUtils;

{ TIBQuery }

constructor TIBQuery.Create(AOwner: TComponent);
begin
  inherited Create(AOwner);
  FSQL := TStringList.Create;
  TStringList(SQL).OnChange := QueryChanged;
  FParams := TParams.Create(Self);
  ParamCheck := True;
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.ResetParser;
begin
  inherited ResetParser;
  UpdateSQL;
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);
begin
  if FInQueryChanged then Exit;
  FInQueryChanged := true;
  try
    if not (csReading in ComponentState) then
    begin
      Disconnect;
      if csDesigning in ComponentState then
        FText := ParseSQL(FParams,SQL.Text, true)
      else
        FText := SQL.Text;
      DataEvent(dePropertyChange, 0);
    end else
      FText := ParseSQL(FParams,SQL.Text, true);

    if not FSQLUpdating then
    begin
      Prepared := false;
      SelectSQL.Assign(SQL);
    end;
  finally
    FInQueryChanged := false;
  end;
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
      if Length(Text) > 1 then PrepareSQL
      else IBError(ibxeEmptySQLStatement, [nil]);
    end
    else
    begin
      InternalUnPrepare;
      FParams.Clear;
    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;
var i: integer;
begin
  if not Prepared then
    Prepare;
  Result := nil;
  if not CaseSensitiveParameterNames then
    Result := FParams.ParamByName(Value)
  else
  begin
    i := FParams.Count - 1;
    while (Result = nil) and (i >= 0) do
      if CompareStr(Value,FParams.Items[i].Name) = 0 then
        Result := FParams.Items[i]
      else
        Dec(i);
    if Result = nil then
      IBError(ibxeParameterNameNotFound,[Value]);
  end;
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
    IBError(ibxeEmptySQLStatement, [nil]);

  ActivateConnection();
  DidActivate := ActivateTransaction;
  try
    SetPrepared(True);
    if DataSource <> nil then SetParamsFromCursor;
    if FParams.Count > 0 then SetParams;
    InternalExecQuery;
  finally
    if DidActivate then
      DeactivateTransaction;
  end;
end;

procedure TIBQuery.SetParams;

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

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;
var List: TParams;
begin
  QSelect.GenerateParamNames := GenerateParamNames;
  InternalPrepare;
  UpdateSQL;
  if ParamCheck  then
  begin
    List := TParams.Create(Self);
    try
      FText := ParseSQL(List,SQL.Text, True);
      List.AssignValues(FParams);
      FParams.Clear;
      FParams.Assign(List);
    finally
      List.Free;
    end;
  end;
end;


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

function TIBQuery.ParseSQL(ParamList: TParams; SQL: string; DoClear: boolean
  ): string;
var ParamNames: TStrings;
    i: integer;
begin
  ParamNames := TStringList.Create;
  try
    Result := TSQLParamProcessor.Execute(SQL,GenerateParamNames,ParamNames);
    if DoClear then ParamList.Clear;
    for i := 0 to ParamNames.Count - 1 do
    begin
      if not CaseSensitiveParameterNames then
        ParamNames[i] := AnsiUpperCase(ParamNames[i]);
      if ParamList.FindParam(ParamNames[i]) = nil then
        ParamList.CreateParam(ftUnknown, ParamNames[i], ptInput);
    end;
  finally
    ParamNames.Free
  end;
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: IStatement;
begin
  Result := SelectStmtHandle;
end;

procedure TIBQuery.UpdateSQL;
begin
  if not FSQLUpdating and not FInQueryChanged and (SQL.Text <> SelectSQL.Text) then
  begin
    FSQLUpdating := true;
    try
      SQL.Text := SelectSQL.Text;
    finally
      FSQLUpdating := false
    end;
  end;
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;

procedure TIBQuery.SQLChanged(Sender: TObject);
begin
  inherited SQLChanged(Sender);
  UpdateSQL;
end;

procedure TIBQuery.SQLChanging(Sender: TObject);
begin
  inherited SQLChanging(Sender);
  Prepared := false;
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:	308
Committed:	Sat Jul 18 10:26:30 2020 UTC (3 years, 9 months ago) by tony
Content type:	text/x-pascal
File size:	15787 byte(s)
Log Message:	Fixes Merged
#	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 - 2018 }
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, Classes, Db, IB, IBCustomDataSet, IBSQL;
47
48	type
49
50	{ TIBQuery }
51
52	TIBQuery = class(TIBParserDataSet)
53	private
54	FSQL: TStrings;
55	FPrepared: Boolean;
56	FParams: TParams;
57	FText: string;
58	FSQLUpdating: boolean;
59	FInQueryChanged: boolean;
60	function GetRowsAffected: Integer;
61	function ParseSQL(ParamList: TParams; SQL: string; DoClear: boolean): string;
62	procedure PrepareSQL;
63	procedure QueryChanged(Sender: TObject);
64	procedure ReadParamData(Reader: TReader);
65	procedure SetQuery(Value: TStrings);
66	procedure SetParamsList(Value: TParams);
67	procedure SetParams;
68	procedure SetParamsFromCursor;
69	procedure SetPrepared(Value: Boolean);
70	procedure SetPrepare(Value: Boolean);
71	procedure WriteParamData(Writer: TWriter);
72	function GetStmtHandle: IStatement;
73	procedure UpdateSQL;
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	procedure DefineProperties(Filer: TFiler); override;
84	procedure InitFieldDefs; override;
85	procedure InternalOpen; override;
86	procedure Disconnect; override;
87	function GetParamsCount: Word;
88	function GenerateQueryForLiveUpdate : Boolean;
89	procedure SetFiltered(Value: Boolean); override;
90	procedure SQLChanged(Sender: TObject); override;
91	procedure SQLChanging(Sender: TObject); override;
92
93	public
94	constructor Create(AOwner: TComponent); override;
95	destructor Destroy; override;
96	procedure BatchInput(InputObject: TIBBatchInput);
97	procedure BatchOutput(OutputObject: TIBBatchOutput);
98	procedure ExecSQL;
99	procedure GetDetailLinkFields(MasterFields, DetailFields: TList);(* override;*)
100	function ParamByName(const Value: string): TParam;
101	procedure Prepare;
102	procedure UnPrepare;
103	procedure ResetParser; override;
104	property Prepared: Boolean read FPrepared write SetPrepare;
105	property ParamCount: Word read GetParamsCount;
106	property StmtHandle: IStatement read GetStmtHandle;
107	property StatementType;
108	property Text: string read FText;
109	property RowsAffected: Integer read GetRowsAffected;
110	// property Params: TParams read FParams write SetParamsList;
111	property BaseSQLSelect;
112
113	published
114	property Active;
115	property AutoCommit;
116	property BufferChunks;
117	property CachedUpdates;
118	property CaseSensitiveParameterNames;
119	property DataSource read GetDataSource write SetDataSource;
120	property EnableStatistics;
121	property GenerateParamNames;
122	// property Constraints stored ConstraintsStored;
123	property GeneratorField;
124	property MasterDetailDelay;
125	property ParamCheck;
126	property SQL: TStrings read FSQL write SetQuery;
127	property Params: TParams read FParams write SetParamsList;
128	property UniDirectional default False;
129	property UpdateObject;
130	property Filtered;
131	property Filter;
132	property SQLFiltered;
133	property SQLFilterParams;
134	property DataSetCloseAction;
135
136	property BeforeDatabaseDisconnect;
137	property AfterDatabaseDisconnect;
138	property DatabaseFree;
139	property BeforeTransactionEnd;
140	property AfterTransactionEnd;
141	property TransactionFree;
142	property OnFilterRecord;
143	property OnValidatePost;
144	property OnDeleteReturning;
145	end;
146
147	implementation
148
149	uses IBMessages, IBUtils;
150
151	{ TIBQuery }
152
153	constructor TIBQuery.Create(AOwner: TComponent);
154	begin
155	inherited Create(AOwner);
156	FSQL := TStringList.Create;
157	TStringList(SQL).OnChange := QueryChanged;
158	FParams := TParams.Create(Self);
159	ParamCheck := True;
160	end;
161
162	destructor TIBQuery.Destroy;
163	begin
164	Destroying;
165	Disconnect;
166	SQL.Free;
167	FParams.Free;
168	inherited Destroy;
169	end;
170
171	procedure TIBQuery.InitFieldDefs;
172	begin
173	inherited InitFieldDefs;
174	end;
175
176	procedure TIBQuery.InternalOpen;
177	begin
178	ActivateConnection();
179	ActivateTransaction;
180	QSelect.GenerateParamNames := GenerateParamNames;
181	SetPrepared(True);
182	if DataSource <> nil then
183	SetParamsFromCursor;
184	SetParams;
185	inherited InternalOpen;
186	end;
187
188	procedure TIBQuery.Disconnect;
189	begin
190	Close;
191	UnPrepare;
192	end;
193
194	procedure TIBQuery.SetPrepare(Value: Boolean);
195	begin
196	if Value then
197	Prepare
198	else
199	UnPrepare;
200	end;
201
202	procedure TIBQuery.Prepare;
203	begin
204	SetPrepared(True);
205	end;
206
207	procedure TIBQuery.UnPrepare;
208	begin
209	SetPrepared(False);
210	end;
211
212	procedure TIBQuery.ResetParser;
213	begin
214	inherited ResetParser;
215	UpdateSQL;
216	end;
217
218	procedure TIBQuery.SetQuery(Value: TStrings);
219	begin
220	if SQL.Text <> Value.Text then
221	begin
222	Disconnect;
223	SQL.BeginUpdate;
224	try
225	SQL.Assign(Value);
226	finally
227	SQL.EndUpdate;
228	end;
229	end;
230	end;
231
232	procedure TIBQuery.QueryChanged(Sender: TObject);
233	begin
234	if FInQueryChanged then Exit;
235	FInQueryChanged := true;
236	try
237	if not (csReading in ComponentState) then
238	begin
239	Disconnect;
240	if csDesigning in ComponentState then
241	FText := ParseSQL(FParams,SQL.Text, true)
242	else
243	FText := SQL.Text;
244	DataEvent(dePropertyChange, 0);
245	end else
246	FText := ParseSQL(FParams,SQL.Text, true);
247
248	if not FSQLUpdating then
249	begin
250	Prepared := false;
251	SelectSQL.Assign(SQL);
252	end;
253	finally
254	FInQueryChanged := false;
255	end;
256	end;
257
258	procedure TIBQuery.SetParamsList(Value: TParams);
259	begin
260	FParams.AssignValues(Value);
261	end;
262
263	function TIBQuery.GetParamsCount: Word;
264	begin
265	Result := FParams.Count;
266	end;
267
268	procedure TIBQuery.DefineProperties(Filer: TFiler);
269
270	function WriteData: Boolean;
271	begin
272	{The following results in a stream read error with nested frames. Hence commented out until
273	someone fixes the LCL }
274	{ if Filer.Ancestor <> nil then
275	Result := not FParams.IsEqual(TIBQuery(Filer.Ancestor).FParams) else}
276	Result := FParams.Count > 0;
277	end;
278
279	begin
280	inherited DefineProperties(Filer);
281	Filer.DefineProperty('ParamData', ReadParamData, WriteParamData, WriteData); {do not localize}
282	end;
283
284
285	procedure TIBQuery.ReadParamData(Reader: TReader);
286	begin
287	FParams.Clear;
288	Reader.ReadValue;
289	Reader.ReadCollection(FParams);
290	end;
291
292	procedure TIBQuery.WriteParamData(Writer: TWriter);
293	begin
294	Writer.WriteCollection(Params);
295	end;
296
297	procedure TIBQuery.SetPrepared(Value: Boolean);
298	begin
299	CheckDatasetClosed;
300	if Value <> Prepared then
301	begin
302	if Value then
303	begin
304	if Length(Text) > 1 then PrepareSQL
305	else IBError(ibxeEmptySQLStatement, [nil]);
306	end
307	else
308	begin
309	InternalUnPrepare;
310	FParams.Clear;
311	end;
312	FPrepared := Value;
313	end;
314	end;
315
316	procedure TIBQuery.SetParamsFromCursor;
317	var
318	I: Integer;
319	DataSet: TDataSet;
320	Field: TField;
321
322	procedure CheckRequiredParams;
323	var
324	I: Integer;
325	begin
326	for I := 0 to FParams.Count - 1 do
327	with FParams[I] do
328	if not Bound then
329	IBError(ibxeRequiredParamNotSet, [FParams[I].Name]);
330	end;
331
332	begin
333	if DataSource <> nil then
334	begin
335	DataSet := DataSource.DataSet;
336	if DataSet <> nil then
337	begin
338	DataSet.FieldDefs.Update;
339	for I := 0 to FParams.Count - 1 do
340	if not FParams[I].Bound then
341	begin
342	Field := DataSet.FindField(FParams[I].Name);
343	if assigned(Field) then
344	begin
345	FParams[I].AssignField(Field);
346	FParams[I].Bound := False;
347	end;
348	end;
349	end
350	else
351	CheckRequiredParams;
352	end
353	else
354	CheckRequiredParams;
355	end;
356
357
358	function TIBQuery.ParamByName(const Value: string): TParam;
359	var i: integer;
360	begin
361	if not Prepared then
362	Prepare;
363	Result := nil;
364	if not CaseSensitiveParameterNames then
365	Result := FParams.ParamByName(Value)
366	else
367	begin
368	i := FParams.Count - 1;
369	while (Result = nil) and (i >= 0) do
370	if CompareStr(Value,FParams.Items[i].Name) = 0 then
371	Result := FParams.Items[i]
372	else
373	Dec(i);
374	if Result = nil then
375	IBError(ibxeParameterNameNotFound,[Value]);
376	end;
377	end;
378
379	procedure TIBQuery.BatchInput(InputObject: TIBBatchInput);
380	begin
381	InternalBatchInput(InputObject);
382	end;
383
384	procedure TIBQuery.BatchOutput(OutputObject: TIBBatchOutput);
385	begin
386	InternalBatchOutput(OutputObject);
387	end;
388
389	procedure TIBQuery.ExecSQL;
390	var
391	DidActivate: Boolean;
392	begin
393	CheckInActive;
394	if SQL.Count <= 0 then
395	IBError(ibxeEmptySQLStatement, [nil]);
396
397	ActivateConnection();
398	DidActivate := ActivateTransaction;
399	try
400	SetPrepared(True);
401	if DataSource <> nil then SetParamsFromCursor;
402	if FParams.Count > 0 then SetParams;
403	InternalExecQuery;
404	finally
405	if DidActivate then
406	DeactivateTransaction;
407	end;
408	end;
409
410	procedure TIBQuery.SetParams;
411
412	var
413	i : integer;
414	Buffer: Pointer;
415	SQLParam: ISQLParam;
416
417	begin
418	for I := 0 to FParams.Count - 1 do
419	begin
420	SQLParam := SQLParams.ByName(Params[i].Name);
421	if Params[i].IsNull then
422	SQLParam.IsNull := True
423	else begin
424	SQLParam.IsNull := False;
425	case Params[i].DataType of
426	ftBytes:
427	begin
428	GetMem(Buffer,Params[i].GetDataSize);
429	try
430	Params[i].GetData(Buffer);
431	SQLParam.AsPointer := Buffer;
432	finally
433	FreeMem(Buffer);
434	end;
435	end;
436	ftString:
437	SQLParam.AsString := Params[i].AsString;
438	ftBoolean:
439	SQLParam.AsBoolean := Params[i].AsBoolean;
440	ftSmallint, ftWord:
441	SQLParam.AsShort := Params[i].AsSmallInt;
442	ftInteger:
443	SQLParam.AsLong := Params[i].AsInteger;
444	ftLargeInt:
445	SQLParam.AsInt64 := Params[i].AsLargeInt;
446	ftFloat:
447	SQLParam.AsDouble := Params[i].AsFloat;
448	ftBCD, ftCurrency:
449	SQLParam.AsCurrency := Params[i].AsCurrency;
450	ftDate:
451	SQLParam.AsDate := Params[i].AsDateTime;
452	ftTime:
453	SQLParam.AsTime := Params[i].AsDateTime;
454	ftDateTime:
455	SQLParam.AsDateTime := Params[i].AsDateTime;
456	ftBlob, ftMemo:
457	SQLParam.AsString := Params[i].AsString;
458	else
459	IBError(ibxeNotSupported, [nil]);
460	end;
461	end;
462	end;
463	end;
464
465	procedure TIBQuery.PrepareSQL;
466	var List: TParams;
467	begin
468	QSelect.GenerateParamNames := GenerateParamNames;
469	InternalPrepare;
470	UpdateSQL;
471	if ParamCheck then
472	begin
473	List := TParams.Create(Self);
474	try
475	FText := ParseSQL(List,SQL.Text, True);
476	List.AssignValues(FParams);
477	FParams.Clear;
478	FParams.Assign(List);
479	finally
480	List.Free;
481	end;
482	end;
483	end;
484
485
486	function TIBQuery.GetRowsAffected: Integer;
487	begin
488	Result := -1;
489	if Prepared then
490	Result := QSelect.RowsAffected
491	end;
492
493	function TIBQuery.ParseSQL(ParamList: TParams; SQL: string; DoClear: boolean
494	): string;
495	var ParamNames: TStrings;
496	i: integer;
497	begin
498	ParamNames := TStringList.Create;
499	try
500	Result := TSQLParamProcessor.Execute(SQL,GenerateParamNames,ParamNames);
501	if DoClear then ParamList.Clear;
502	for i := 0 to ParamNames.Count - 1 do
503	begin
504	if not CaseSensitiveParameterNames then
505	ParamNames[i] := AnsiUpperCase(ParamNames[i]);
506	if ParamList.FindParam(ParamNames[i]) = nil then
507	ParamList.CreateParam(ftUnknown, ParamNames[i], ptInput);
508	end;
509	finally
510	ParamNames.Free
511	end;
512	end;
513
514
515	procedure TIBQuery.GetDetailLinkFields(MasterFields, DetailFields: TList);
516
517	function AddFieldToList(const FieldName: string; DataSet: TDataSet;
518	List: TList): Boolean;
519	var
520	Field: TField;
521	begin
522	Field := DataSet.FindField(FieldName);
523	if (Field <> nil) then
524	List.Add(Field);
525	Result := Field <> nil;
526	end;
527
528	var
529	i: Integer;
530	begin
531	MasterFields.Clear;
532	DetailFields.Clear;
533	if (DataSource <> nil) and (DataSource.DataSet <> nil) then
534	for i := 0 to Params.Count - 1 do
535	if AddFieldToList(Params[i].Name, DataSource.DataSet, MasterFields) then
536	AddFieldToList(Params[i].Name, Self, DetailFields);
537	end;
538
539	function TIBQuery.GetStmtHandle: IStatement;
540	begin
541	Result := SelectStmtHandle;
542	end;
543
544	procedure TIBQuery.UpdateSQL;
545	begin
546	if not FSQLUpdating and not FInQueryChanged and (SQL.Text <> SelectSQL.Text) then
547	begin
548	FSQLUpdating := true;
549	try
550	SQL.Text := SelectSQL.Text;
551	finally
552	FSQLUpdating := false
553	end;
554	end;
555	end;
556
557	function TIBQuery.GenerateQueryForLiveUpdate : Boolean;
558	begin
559	Result := False;
560	end;
561
562	procedure TIBQuery.SetFiltered(Value: Boolean);
563	begin
564	if(Filtered <> Value) then
565	begin
566	inherited SetFiltered(value);
567	if Active then
568	begin
569	Close;
570	Open;
571	end;
572	end
573	else
574	inherited SetFiltered(value);
575	end;
576
577	procedure TIBQuery.SQLChanged(Sender: TObject);
578	begin
579	inherited SQLChanged(Sender);
580	UpdateSQL;
581	end;
582
583	procedure TIBQuery.SQLChanging(Sender: TObject);
584	begin
585	inherited SQLChanging(Sender);
586	Prepared := false;
587	end;
588
589	{ TIBQuery IProviderSupport }
590	(*
591	function TIBQuery.PSGetParams: TParams;
592	begin
593	Result := Params;
594	end;
595
596	procedure TIBQuery.PSSetParams(AParams: TParams);
597	begin
598	if AParams.Count <> 0 then
599	Params.Assign(AParams);
600	Close;
601	end;
602
603	function TIBQuery.PSGetTableName: string;
604	begin
605	Result := inherited PSGetTableName;
606	end;
607
608	procedure TIBQuery.PSExecute;
609	begin
610	ExecSQL;
611	end;
612
613	procedure TIBQuery.PSSetCommandText(const CommandText: string);
614	begin
615	if CommandText <> '' then
616	SQL.Text := CommandText;
617	end;
618	*)
619	end.
620