fbintf/client/FBStatement.pas

(*
 *  Firebird Interface (fbintf). The fbintf components provide a set of
 *  Pascal language bindings for the Firebird API. Although predominantly
 *  a new development they include source code taken from IBX and may be
 *  considered a derived product. This software thus also includes the copyright
 *  notice and license conditions from IBX.
 *
 *  Except for those parts dervied from IBX, contents of this file are subject
 *  to the Initial Developer's Public License Version 1.0 (the "License"); you
 *  may not use this file except in compliance with the License. You may obtain a
 *  copy of the License here:
 *
 *    http://www.firebirdsql.org/index.php?op=doc&id=idpl
 *
 *  Software distributed under the License is distributed on an "AS
 *  IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
 *  implied. See the License for the specific language governing rights
 *  and limitations under the License.
 *
 *  The Initial Developer of the Original Code is Tony Whyman.
 *
 *  The Original Code is (C) 2016 Tony Whyman, MWA Software
 *  (http://www.mwasoftware.co.uk).
 *
 *  All Rights Reserved.
 *
 *  Contributor(s): ______________________________________.
 *
*)
unit FBStatement;
{$IFDEF MSWINDOWS} 
{$DEFINE WINDOWS} 
{$ENDIF}

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

interface

uses
  Classes, SysUtils,  IB,  FBClientAPI, FBSQLData, FBOutputBlock, FBActivityMonitor,
  FBTransaction;

const
  DefaultBatchRowLimit = 1000;

type
  TPerfStatistics = array[psCurrentMemory..psFetches] of Int64;

  { TFBStatement }

  TFBStatement = class(TActivityReporter,ITransactionUser)
  private
    FAttachmentIntf: IAttachment;
    FFirebirdClientAPI: TFBClientAPI;
  protected
    FTransactionIntf: ITransaction;
    FExecTransactionIntf: ITransaction;
    FSQLStatementType: TIBSQLStatementTypes;         { Select, update, delete, insert, create, alter, etc...}
    FSQLDialect: integer;
    FOpen: boolean;
    FPrepared: boolean;
    FPrepareSeqNo: integer; {used to check for out of date references from interfaces}
    FSQL: AnsiString;
    FProcessedSQL: AnsiString;
    FHasParamNames: boolean;
    FBOF: boolean;
    FEOF: boolean;
    FSingleResults: boolean;
    FGenerateParamNames: boolean;
    FChangeSeqNo: integer;
    FCollectStatistics: boolean;
    FStatisticsAvailable: boolean;
    FBeforeStats: TPerfStatistics;
    FAfterStats: TPerfStatistics;
    FCaseSensitiveParams: boolean;
    FBatchRowLimit: integer;
    procedure CheckChangeBatchRowLimit; virtual;
    procedure CheckHandle; virtual; abstract;
    procedure CheckTransaction(aTransaction: ITransaction);
    procedure GetDsqlInfo(info_request: byte; buffer: ISQLInfoResults); overload; virtual; abstract;
    procedure InternalPrepare;  virtual; abstract;
    function InternalExecute(Transaction: ITransaction): IResults;  virtual; abstract;
    function InternalOpenCursor(aTransaction: ITransaction): IResultSet;   virtual; abstract;
    procedure ProcessSQL(sql: AnsiString; GenerateParamNames: boolean; var processedSQL: AnsiString); virtual; abstract;
    procedure FreeHandle;  virtual; abstract;
    procedure InternalClose(Force: boolean); virtual; abstract;
    function TimeStampToMSecs(const TimeStamp: TTimeStamp): Int64;
  public
    constructor Create(Attachment: IAttachment; Transaction: ITransaction;
      sql: AnsiString; SQLDialect: integer);
    constructor CreateWithParameterNames(Attachment: IAttachment; Transaction: ITransaction;
      sql: AnsiString;  SQLDialect: integer; GenerateParamNames: boolean =false;
      CaseSensitiveParams: boolean = false);
    destructor Destroy; override;
    procedure Close;
    procedure TransactionEnding(aTransaction: ITransaction; Force: boolean);
    property SQLDialect: integer read FSQLDialect;
    property FirebirdClientAPI: TFBClientAPI read FFirebirdClientAPI;

  public
    function GetSQLParams: ISQLParams; virtual; abstract;
    function GetMetaData: IMetaData;  virtual; abstract;
    function GetRowsAffected(var SelectCount, InsertCount, UpdateCount,
      DeleteCount: integer): boolean;
    function GetSQLStatementType: TIBSQLStatementTypes;
    function GetSQLStatementTypeName: AnsiString;
    function GetSQLText: AnsiString;
    function GetProcessedSQLText: AnsiString;
    function GetSQLDialect: integer;

    {GetDSQLInfo only supports isc_info_sql_stmt_type, isc_info_sql_get_plan, isc_info_sql_records}
    procedure Prepare(aTransaction: ITransaction=nil); virtual;
    function Execute(aTransaction: ITransaction=nil): IResults;
    function OpenCursor(aTransaction: ITransaction=nil): IResultSet;
    function CreateBlob(paramName: AnsiString): IBlob; overload;
    function CreateBlob(index: integer): IBlob; overload;
    function CreateBlob(column: TColumnMetaData): IBlob; overload; virtual; abstract;
    function CreateArray(paramName: AnsiString): IArray; overload;
    function CreateArray(index: integer): IArray;  overload;
    function CreateArray(column: TColumnMetaData): IArray; overload; virtual; abstract;
    function GetAttachment: IAttachment;
    function GetTransaction: ITransaction;
    function GetDSQLInfo(Request: byte): ISQLInfoResults; overload;
    procedure SetRetainInterfaces(aValue: boolean); virtual;
    procedure EnableStatistics(aValue: boolean);
    function GetPerfStatistics(var stats: TPerfCounters): boolean;
    function IsInBatchMode: boolean; virtual;
    function HasBatchMode: boolean; virtual;
  public
    {IBatch support}
    procedure AddToBatch; virtual;
    function ExecuteBatch(aTransaction: ITransaction): IBatchCompletion; virtual;
    procedure CancelBatch; virtual;
    function GetBatchCompletion: IBatchCompletion; virtual;
    function GetBatchRowLimit: integer;
    procedure SetBatchRowLimit(aLimit: integer);
  public
    property ChangeSeqNo: integer read FChangeSeqNo;
    property SQLParams: ISQLParams read GetSQLParams;
    property SQLStatementType: TIBSQLStatementTypes read GetSQLStatementType;
end;

implementation

uses FBMessages;

{ TFBStatement }

procedure TFBStatement.CheckChangeBatchRowLimit;
begin
  //Do Nothing
end;

procedure TFBStatement.CheckTransaction(aTransaction: ITransaction);
begin
  if (aTransaction = nil) then
    IBError(ibxeTransactionNotAssigned,[]);

  if not aTransaction.InTransaction then
    IBError(ibxeNotInTransaction,[]);
end;

function TFBStatement.TimeStampToMSecs(const TimeStamp: TTimeStamp): Int64;
begin
  Result := TimeStamp.Time + Int64(timestamp.date)*msecsperday;
end;

constructor TFBStatement.Create(Attachment: IAttachment;
  Transaction: ITransaction; sql: AnsiString; SQLDialect: integer);
begin
  inherited Create(Transaction as TFBTransaction,2);
  FAttachmentIntf := Attachment;
  FTransactionIntf := Transaction;
  FFirebirdClientAPI := Attachment.getFirebirdAPI as TFBClientAPI;
  FSQLDialect := SQLDialect;
  FSQL := sql;
  FBatchRowLimit := DefaultBatchRowLimit;
end;

constructor TFBStatement.CreateWithParameterNames(Attachment: IAttachment;
  Transaction: ITransaction; sql: AnsiString; SQLDialect: integer;
  GenerateParamNames: boolean; CaseSensitiveParams: boolean);
begin
  FHasParamNames := true;
  FGenerateParamNames := GenerateParamNames;
  FCaseSensitiveParams := CaseSensitiveParams;
  Create(Attachment,Transaction,sql,SQLDialect);
end;

destructor TFBStatement.Destroy;
begin
  Close;
  FreeHandle;
  inherited Destroy;
end;

procedure TFBStatement.Close;
begin
  InternalClose(false);
end;

procedure TFBStatement.TransactionEnding(aTransaction: ITransaction;
  Force: boolean);
begin
  if FOpen and ((FExecTransactionIntf as TObject) = (aTransaction as TObject)) then
    InternalClose(Force);

  if FTransactionIntf = aTransaction then
  begin
    FreeHandle;
    FPrepared := false;
  end;
end;

function TFBStatement.GetRowsAffected(var SelectCount, InsertCount,
  UpdateCount, DeleteCount: integer): boolean;
var
  RB: ISQLInfoResults;
  i, j: integer;
begin
  InsertCount := 0;
  UpdateCount := 0;
  DeleteCount := 0;
  Result := FPrepared;
  if not Result then Exit;

  RB := GetDsqlInfo(isc_info_sql_records);

  for i := 0 to RB.Count - 1 do
  with RB[i] do
  case getItemType of
  isc_info_sql_records:
    for j := 0 to Count -1 do
    with Items[j] do
    case getItemType of
    isc_info_req_select_count:
      SelectCount := GetAsInteger;
    isc_info_req_insert_count:
      InsertCount := GetAsInteger;
    isc_info_req_update_count:
      UpdateCount := GetAsInteger;
    isc_info_req_delete_count:
      DeleteCount := GetAsInteger;
    end;
  end;
end;

function TFBStatement.GetSQLStatementType: TIBSQLStatementTypes;
begin
  Result := FSQLStatementType;
end;

function TFBStatement.GetSQLStatementTypeName: AnsiString;
begin
  case FSQLStatementType of
  SQLUnknown: Result := 'SQL_Unknown';
  SQLSelect: Result := 'SQL_Select';
  SQLInsert: Result := 'SQL_Insert';
  SQLUpdate: Result := 'SQL_Update';
  SQLDelete: Result := 'SQL_Delete';
  SQLDDL: Result := 'SQL_DDL';
  SQLGetSegment: Result := 'SQL_GetSegment';
  SQLPutSegment: Result := 'SQL_PutSegment';
  SQLExecProcedure: Result := 'SQL_ExecProcedure';
  SQLStartTransaction: Result := 'SQL_StartTransaction';
  SQLCommit: Result := 'SQL_Commit';
  SQLRollback: Result := 'SQL_Rollback';
  SQLSelectForUpdate: Result := 'SQL_SelectForUpdate';
  SQLSetGenerator: Result := 'SQL_SetGenerator';
  SQLSavePoint: Result := 'SQL_SavePoint';
  end;
end;

function TFBStatement.GetSQLText: AnsiString;
begin
  Result := FSQL;
end;

function TFBStatement.GetProcessedSQLText: AnsiString;
begin
  if FProcessedSQL = '' then
    ProcessSQL(FSQL,FGenerateParamNames,FProcessedSQL);
  Result := FProcessedSQL
end;

function TFBStatement.GetSQLDialect: integer;
begin
  Result := FSQLDialect;
end;

procedure TFBStatement.Prepare(aTransaction: ITransaction);
begin
  if FPrepared then FreeHandle;
  if aTransaction <> nil then
  begin
    RemoveMonitor(FTransactionIntf as TFBTransaction);
    FTransactionIntf := aTransaction;
    AddMonitor(FTransactionIntf as TFBTransaction);
  end;
  InternalPrepare;
end;

function TFBStatement.Execute(aTransaction: ITransaction): IResults;
begin
  if aTransaction = nil then
    Result :=  InternalExecute(FTransactionIntf)
  else
    Result := InternalExecute(aTransaction);
end;

procedure TFBStatement.AddToBatch;
begin
  IBError(ibxeBatchModeNotSupported,[]);
end;

function TFBStatement.ExecuteBatch(aTransaction: ITransaction
  ): IBatchCompletion;
begin
  IBError(ibxeBatchModeNotSupported,[]);
end;

procedure TFBStatement.CancelBatch;
begin
  IBError(ibxeBatchModeNotSupported,[]);
end;

function TFBStatement.GetBatchCompletion: IBatchCompletion;
begin
  IBError(ibxeBatchModeNotSupported,[]);
end;

function TFBStatement.GetBatchRowLimit: integer;
begin
  Result := FBatchRowLimit;
end;

procedure TFBStatement.SetBatchRowLimit(aLimit: integer);
begin
  CheckChangeBatchRowLimit;
  FBatchRowLimit := aLimit;
end;

function TFBStatement.OpenCursor(aTransaction: ITransaction): IResultSet;
begin
  Close;
  if aTransaction = nil then
    Result := InternalOpenCursor(FTransactionIntf)
  else
    Result := InternalOpenCursor(aTransaction);
end;

function TFBStatement.CreateBlob(paramName: AnsiString): IBlob;
var column: TColumnMetaData;
begin
  InternalPrepare;
  column := SQLParams.ByName(paramName) as TSQLParam;
  if column = nil then
    IBError(ibxeFieldNotFound,[paramName]);
  Result := CreateBlob(column);
end;

function TFBStatement.CreateBlob(index: integer): IBlob;
begin
  InternalPrepare;
  Result := CreateBlob(SQLParams[index] as TSQLParam);
end;

function TFBStatement.CreateArray(paramName: AnsiString): IArray;
var column: TColumnMetaData;
begin
  InternalPrepare;
  column := SQLParams.ByName(paramName) as TSQLParam;
  if column = nil then
    IBError(ibxeFieldNotFound,[paramName]);
  Result := CreateArray(column);
end;

function TFBStatement.CreateArray(index: integer): IArray;
begin
  InternalPrepare;
  Result := CreateArray(SQLParams[index] as TSQLParam);
end;

function TFBStatement.GetAttachment: IAttachment;
begin
  Result := FAttachmentIntf;
end;

function TFBStatement.GetTransaction: ITransaction;
begin
  Result := FTransactionIntf
end;

function TFBStatement.GetDSQLInfo(Request: byte): ISQLInfoResults;
begin
  Result := TSQLInfoResultsBuffer.Create(FFirebirdClientAPI);
  GetDsqlInfo(Request,Result);
end;

procedure TFBStatement.SetRetainInterfaces(aValue: boolean);
begin
  RetainInterfaces := aValue;
end;

procedure TFBStatement.EnableStatistics(aValue: boolean);
begin
  if FCollectStatistics <> aValue then
  begin
    FCollectStatistics := aValue;
    FStatisticsAvailable := false;
  end;
end;

function TFBStatement.GetPerfStatistics(var stats: TPerfCounters): boolean;
begin
  Result := FStatisticsAvailable;
  if Result then
  begin
    stats[psCurrentMemory] := FAfterStats[psCurrentMemory];
    stats[psDeltaMemory] := FAfterStats[psCurrentMemory] - FBeforeStats[psCurrentMemory];
    stats[psMaxMemory] := FAfterStats[psMaxMemory];
    stats[psRealTime] :=  FAfterStats[psRealTime] - FBeforeStats[psRealTime];
    stats[psUserTime] :=  FAfterStats[psUserTime] - FBeforeStats[psUserTime];
    stats[psReads] := FAfterStats[psReads] - FBeforeStats[psReads];
    stats[psWrites] := FAfterStats[psWrites] - FBeforeStats[psWrites];
    stats[psFetches] := FAfterStats[psFetches] - FBeforeStats[psFetches];
    stats[psBuffers] :=  FAfterStats[psBuffers];
  end;
end;

function TFBStatement.IsInBatchMode: boolean;
begin
  Result := false;
end;

function TFBStatement.HasBatchMode: boolean;
begin
  Result := false;
end;

end.

Revision:	345
Committed:	Mon Aug 23 14:22:29 2021 UTC (2 years, 7 months ago) by tony
Content type:	text/x-pascal
File size:	13573 byte(s)
Log Message:	Merged into public release
#	Content
1	(*
2	* Firebird Interface (fbintf). The fbintf components provide a set of
3	* Pascal language bindings for the Firebird API. Although predominantly
4	* a new development they include source code taken from IBX and may be
5	* considered a derived product. This software thus also includes the copyright
6	* notice and license conditions from IBX.
7	*
8	* Except for those parts dervied from IBX, contents of this file are subject
9	* to the Initial Developer's Public License Version 1.0 (the "License"); you
10	* may not use this file except in compliance with the License. You may obtain a
11	* copy of the License here:
12	*
13	* http://www.firebirdsql.org/index.php?op=doc&id=idpl
14	*
15	* Software distributed under the License is distributed on an "AS
16	* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
17	* implied. See the License for the specific language governing rights
18	* and limitations under the License.
19	*
20	* The Initial Developer of the Original Code is Tony Whyman.
21	*
22	* The Original Code is (C) 2016 Tony Whyman, MWA Software
23	* (http://www.mwasoftware.co.uk).
24	*
25	* All Rights Reserved.
26	*
27	* Contributor(s): ______________________________________.
28	*
29	*)
30	unit FBStatement;
31	{$IFDEF MSWINDOWS}
32	{$DEFINE WINDOWS}
33	{$ENDIF}
34
35	{$IFDEF FPC}
36	{$mode delphi}
37	{$codepage UTF8}
38	{$interfaces COM}
39	{$ENDIF}
40
41	interface
42
43	uses
44	Classes, SysUtils, IB, FBClientAPI, FBSQLData, FBOutputBlock, FBActivityMonitor,
45	FBTransaction;
46
47	const
48	DefaultBatchRowLimit = 1000;
49
50	type
51	TPerfStatistics = array[psCurrentMemory..psFetches] of Int64;
52
53	{ TFBStatement }
54
55	TFBStatement = class(TActivityReporter,ITransactionUser)
56	private
57	FAttachmentIntf: IAttachment;
58	FFirebirdClientAPI: TFBClientAPI;
59	protected
60	FTransactionIntf: ITransaction;
61	FExecTransactionIntf: ITransaction;
62	FSQLStatementType: TIBSQLStatementTypes; { Select, update, delete, insert, create, alter, etc...}
63	FSQLDialect: integer;
64	FOpen: boolean;
65	FPrepared: boolean;
66	FPrepareSeqNo: integer; {used to check for out of date references from interfaces}
67	FSQL: AnsiString;
68	FProcessedSQL: AnsiString;
69	FHasParamNames: boolean;
70	FBOF: boolean;
71	FEOF: boolean;
72	FSingleResults: boolean;
73	FGenerateParamNames: boolean;
74	FChangeSeqNo: integer;
75	FCollectStatistics: boolean;
76	FStatisticsAvailable: boolean;
77	FBeforeStats: TPerfStatistics;
78	FAfterStats: TPerfStatistics;
79	FCaseSensitiveParams: boolean;
80	FBatchRowLimit: integer;
81	procedure CheckChangeBatchRowLimit; virtual;
82	procedure CheckHandle; virtual; abstract;
83	procedure CheckTransaction(aTransaction: ITransaction);
84	procedure GetDsqlInfo(info_request: byte; buffer: ISQLInfoResults); overload; virtual; abstract;
85	procedure InternalPrepare; virtual; abstract;
86	function InternalExecute(Transaction: ITransaction): IResults; virtual; abstract;
87	function InternalOpenCursor(aTransaction: ITransaction): IResultSet; virtual; abstract;
88	procedure ProcessSQL(sql: AnsiString; GenerateParamNames: boolean; var processedSQL: AnsiString); virtual; abstract;
89	procedure FreeHandle; virtual; abstract;
90	procedure InternalClose(Force: boolean); virtual; abstract;
91	function TimeStampToMSecs(const TimeStamp: TTimeStamp): Int64;
92	public
93	constructor Create(Attachment: IAttachment; Transaction: ITransaction;
94	sql: AnsiString; SQLDialect: integer);
95	constructor CreateWithParameterNames(Attachment: IAttachment; Transaction: ITransaction;
96	sql: AnsiString; SQLDialect: integer; GenerateParamNames: boolean =false;
97	CaseSensitiveParams: boolean = false);
98	destructor Destroy; override;
99	procedure Close;
100	procedure TransactionEnding(aTransaction: ITransaction; Force: boolean);
101	property SQLDialect: integer read FSQLDialect;
102	property FirebirdClientAPI: TFBClientAPI read FFirebirdClientAPI;
103
104	public
105	function GetSQLParams: ISQLParams; virtual; abstract;
106	function GetMetaData: IMetaData; virtual; abstract;
107	function GetRowsAffected(var SelectCount, InsertCount, UpdateCount,
108	DeleteCount: integer): boolean;
109	function GetSQLStatementType: TIBSQLStatementTypes;
110	function GetSQLStatementTypeName: AnsiString;
111	function GetSQLText: AnsiString;
112	function GetProcessedSQLText: AnsiString;
113	function GetSQLDialect: integer;
114
115	{GetDSQLInfo only supports isc_info_sql_stmt_type, isc_info_sql_get_plan, isc_info_sql_records}
116	procedure Prepare(aTransaction: ITransaction=nil); virtual;
117	function Execute(aTransaction: ITransaction=nil): IResults;
118	function OpenCursor(aTransaction: ITransaction=nil): IResultSet;
119	function CreateBlob(paramName: AnsiString): IBlob; overload;
120	function CreateBlob(index: integer): IBlob; overload;
121	function CreateBlob(column: TColumnMetaData): IBlob; overload; virtual; abstract;
122	function CreateArray(paramName: AnsiString): IArray; overload;
123	function CreateArray(index: integer): IArray; overload;
124	function CreateArray(column: TColumnMetaData): IArray; overload; virtual; abstract;
125	function GetAttachment: IAttachment;
126	function GetTransaction: ITransaction;
127	function GetDSQLInfo(Request: byte): ISQLInfoResults; overload;
128	procedure SetRetainInterfaces(aValue: boolean); virtual;
129	procedure EnableStatistics(aValue: boolean);
130	function GetPerfStatistics(var stats: TPerfCounters): boolean;
131	function IsInBatchMode: boolean; virtual;
132	function HasBatchMode: boolean; virtual;
133	public
134	{IBatch support}
135	procedure AddToBatch; virtual;
136	function ExecuteBatch(aTransaction: ITransaction): IBatchCompletion; virtual;
137	procedure CancelBatch; virtual;
138	function GetBatchCompletion: IBatchCompletion; virtual;
139	function GetBatchRowLimit: integer;
140	procedure SetBatchRowLimit(aLimit: integer);
141	public
142	property ChangeSeqNo: integer read FChangeSeqNo;
143	property SQLParams: ISQLParams read GetSQLParams;
144	property SQLStatementType: TIBSQLStatementTypes read GetSQLStatementType;
145	end;
146
147	implementation
148
149	uses FBMessages;
150
151	{ TFBStatement }
152
153	procedure TFBStatement.CheckChangeBatchRowLimit;
154	begin
155	//Do Nothing
156	end;
157
158	procedure TFBStatement.CheckTransaction(aTransaction: ITransaction);
159	begin
160	if (aTransaction = nil) then
161	IBError(ibxeTransactionNotAssigned,[]);
162
163	if not aTransaction.InTransaction then
164	IBError(ibxeNotInTransaction,[]);
165	end;
166
167	function TFBStatement.TimeStampToMSecs(const TimeStamp: TTimeStamp): Int64;
168	begin
169	Result := TimeStamp.Time + Int64(timestamp.date)*msecsperday;
170	end;
171
172	constructor TFBStatement.Create(Attachment: IAttachment;
173	Transaction: ITransaction; sql: AnsiString; SQLDialect: integer);
174	begin
175	inherited Create(Transaction as TFBTransaction,2);
176	FAttachmentIntf := Attachment;
177	FTransactionIntf := Transaction;
178	FFirebirdClientAPI := Attachment.getFirebirdAPI as TFBClientAPI;
179	FSQLDialect := SQLDialect;
180	FSQL := sql;
181	FBatchRowLimit := DefaultBatchRowLimit;
182	end;
183
184	constructor TFBStatement.CreateWithParameterNames(Attachment: IAttachment;
185	Transaction: ITransaction; sql: AnsiString; SQLDialect: integer;
186	GenerateParamNames: boolean; CaseSensitiveParams: boolean);
187	begin
188	FHasParamNames := true;
189	FGenerateParamNames := GenerateParamNames;
190	FCaseSensitiveParams := CaseSensitiveParams;
191	Create(Attachment,Transaction,sql,SQLDialect);
192	end;
193
194	destructor TFBStatement.Destroy;
195	begin
196	Close;
197	FreeHandle;
198	inherited Destroy;
199	end;
200
201	procedure TFBStatement.Close;
202	begin
203	InternalClose(false);
204	end;
205
206	procedure TFBStatement.TransactionEnding(aTransaction: ITransaction;
207	Force: boolean);
208	begin
209	if FOpen and ((FExecTransactionIntf as TObject) = (aTransaction as TObject)) then
210	InternalClose(Force);
211
212	if FTransactionIntf = aTransaction then
213	begin
214	FreeHandle;
215	FPrepared := false;
216	end;
217	end;
218
219	function TFBStatement.GetRowsAffected(var SelectCount, InsertCount,
220	UpdateCount, DeleteCount: integer): boolean;
221	var
222	RB: ISQLInfoResults;
223	i, j: integer;
224	begin
225	InsertCount := 0;
226	UpdateCount := 0;
227	DeleteCount := 0;
228	Result := FPrepared;
229	if not Result then Exit;
230
231	RB := GetDsqlInfo(isc_info_sql_records);
232
233	for i := 0 to RB.Count - 1 do
234	with RB[i] do
235	case getItemType of
236	isc_info_sql_records:
237	for j := 0 to Count -1 do
238	with Items[j] do
239	case getItemType of
240	isc_info_req_select_count:
241	SelectCount := GetAsInteger;
242	isc_info_req_insert_count:
243	InsertCount := GetAsInteger;
244	isc_info_req_update_count:
245	UpdateCount := GetAsInteger;
246	isc_info_req_delete_count:
247	DeleteCount := GetAsInteger;
248	end;
249	end;
250	end;
251
252	function TFBStatement.GetSQLStatementType: TIBSQLStatementTypes;
253	begin
254	Result := FSQLStatementType;
255	end;
256
257	function TFBStatement.GetSQLStatementTypeName: AnsiString;
258	begin
259	case FSQLStatementType of
260	SQLUnknown: Result := 'SQL_Unknown';
261	SQLSelect: Result := 'SQL_Select';
262	SQLInsert: Result := 'SQL_Insert';
263	SQLUpdate: Result := 'SQL_Update';
264	SQLDelete: Result := 'SQL_Delete';
265	SQLDDL: Result := 'SQL_DDL';
266	SQLGetSegment: Result := 'SQL_GetSegment';
267	SQLPutSegment: Result := 'SQL_PutSegment';
268	SQLExecProcedure: Result := 'SQL_ExecProcedure';
269	SQLStartTransaction: Result := 'SQL_StartTransaction';
270	SQLCommit: Result := 'SQL_Commit';
271	SQLRollback: Result := 'SQL_Rollback';
272	SQLSelectForUpdate: Result := 'SQL_SelectForUpdate';
273	SQLSetGenerator: Result := 'SQL_SetGenerator';
274	SQLSavePoint: Result := 'SQL_SavePoint';
275	end;
276	end;
277
278	function TFBStatement.GetSQLText: AnsiString;
279	begin
280	Result := FSQL;
281	end;
282
283	function TFBStatement.GetProcessedSQLText: AnsiString;
284	begin
285	if FProcessedSQL = '' then
286	ProcessSQL(FSQL,FGenerateParamNames,FProcessedSQL);
287	Result := FProcessedSQL
288	end;
289
290	function TFBStatement.GetSQLDialect: integer;
291	begin
292	Result := FSQLDialect;
293	end;
294
295	procedure TFBStatement.Prepare(aTransaction: ITransaction);
296	begin
297	if FPrepared then FreeHandle;
298	if aTransaction <> nil then
299	begin
300	RemoveMonitor(FTransactionIntf as TFBTransaction);
301	FTransactionIntf := aTransaction;
302	AddMonitor(FTransactionIntf as TFBTransaction);
303	end;
304	InternalPrepare;
305	end;
306
307	function TFBStatement.Execute(aTransaction: ITransaction): IResults;
308	begin
309	if aTransaction = nil then
310	Result := InternalExecute(FTransactionIntf)
311	else
312	Result := InternalExecute(aTransaction);
313	end;
314
315	procedure TFBStatement.AddToBatch;
316	begin
317	IBError(ibxeBatchModeNotSupported,[]);
318	end;
319
320	function TFBStatement.ExecuteBatch(aTransaction: ITransaction
321	): IBatchCompletion;
322	begin
323	IBError(ibxeBatchModeNotSupported,[]);
324	end;
325
326	procedure TFBStatement.CancelBatch;
327	begin
328	IBError(ibxeBatchModeNotSupported,[]);
329	end;
330
331	function TFBStatement.GetBatchCompletion: IBatchCompletion;
332	begin
333	IBError(ibxeBatchModeNotSupported,[]);
334	end;
335
336	function TFBStatement.GetBatchRowLimit: integer;
337	begin
338	Result := FBatchRowLimit;
339	end;
340
341	procedure TFBStatement.SetBatchRowLimit(aLimit: integer);
342	begin
343	CheckChangeBatchRowLimit;
344	FBatchRowLimit := aLimit;
345	end;
346
347	function TFBStatement.OpenCursor(aTransaction: ITransaction): IResultSet;
348	begin
349	Close;
350	if aTransaction = nil then
351	Result := InternalOpenCursor(FTransactionIntf)
352	else
353	Result := InternalOpenCursor(aTransaction);
354	end;
355
356	function TFBStatement.CreateBlob(paramName: AnsiString): IBlob;
357	var column: TColumnMetaData;
358	begin
359	InternalPrepare;
360	column := SQLParams.ByName(paramName) as TSQLParam;
361	if column = nil then
362	IBError(ibxeFieldNotFound,[paramName]);
363	Result := CreateBlob(column);
364	end;
365
366	function TFBStatement.CreateBlob(index: integer): IBlob;
367	begin
368	InternalPrepare;
369	Result := CreateBlob(SQLParams[index] as TSQLParam);
370	end;
371
372	function TFBStatement.CreateArray(paramName: AnsiString): IArray;
373	var column: TColumnMetaData;
374	begin
375	InternalPrepare;
376	column := SQLParams.ByName(paramName) as TSQLParam;
377	if column = nil then
378	IBError(ibxeFieldNotFound,[paramName]);
379	Result := CreateArray(column);
380	end;
381
382	function TFBStatement.CreateArray(index: integer): IArray;
383	begin
384	InternalPrepare;
385	Result := CreateArray(SQLParams[index] as TSQLParam);
386	end;
387
388	function TFBStatement.GetAttachment: IAttachment;
389	begin
390	Result := FAttachmentIntf;
391	end;
392
393	function TFBStatement.GetTransaction: ITransaction;
394	begin
395	Result := FTransactionIntf
396	end;
397
398	function TFBStatement.GetDSQLInfo(Request: byte): ISQLInfoResults;
399	begin
400	Result := TSQLInfoResultsBuffer.Create(FFirebirdClientAPI);
401	GetDsqlInfo(Request,Result);
402	end;
403
404	procedure TFBStatement.SetRetainInterfaces(aValue: boolean);
405	begin
406	RetainInterfaces := aValue;
407	end;
408
409	procedure TFBStatement.EnableStatistics(aValue: boolean);
410	begin
411	if FCollectStatistics <> aValue then
412	begin
413	FCollectStatistics := aValue;
414	FStatisticsAvailable := false;
415	end;
416	end;
417
418	function TFBStatement.GetPerfStatistics(var stats: TPerfCounters): boolean;
419	begin
420	Result := FStatisticsAvailable;
421	if Result then
422	begin
423	stats[psCurrentMemory] := FAfterStats[psCurrentMemory];
424	stats[psDeltaMemory] := FAfterStats[psCurrentMemory] - FBeforeStats[psCurrentMemory];
425	stats[psMaxMemory] := FAfterStats[psMaxMemory];
426	stats[psRealTime] := FAfterStats[psRealTime] - FBeforeStats[psRealTime];
427	stats[psUserTime] := FAfterStats[psUserTime] - FBeforeStats[psUserTime];
428	stats[psReads] := FAfterStats[psReads] - FBeforeStats[psReads];
429	stats[psWrites] := FAfterStats[psWrites] - FBeforeStats[psWrites];
430	stats[psFetches] := FAfterStats[psFetches] - FBeforeStats[psFetches];
431	stats[psBuffers] := FAfterStats[psBuffers];
432	end;
433	end;
434
435	function TFBStatement.IsInBatchMode: boolean;
436	begin
437	Result := false;
438	end;
439
440	function TFBStatement.HasBatchMode: boolean;
441	begin
442	Result := false;
443	end;
444
445	end.
446