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    FPrepareSeqNo: integer; {used to check for out of date references from interfaces}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 (3 years, 3 months ago) by tony
Content type:	text/x-pascal
Original Path:	*ibx/trunk/fbintf/client/FBStatement.pas*
File size:	13573 byte(s)
Log Message:	Merged into public release
#	User	Rev	Content
1	tony	45	(*
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	tony	56	{$IFDEF MSWINDOWS}
32			{$DEFINE WINDOWS}
33			{$ENDIF}
34	tony	45
35			{$IFDEF FPC}
36	tony	56	{$mode delphi}
37	tony	45	{$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	tony	345	const
48			DefaultBatchRowLimit = 1000;
49
50	tony	45	type
51	tony	209	TPerfStatistics = array[psCurrentMemory..psFetches] of Int64;
52	tony	45
53			{ TFBStatement }
54
55	tony	315	TFBStatement = class(TActivityReporter,ITransactionUser)
56	tony	45	private
57			FAttachmentIntf: IAttachment;
58	tony	263	FFirebirdClientAPI: TFBClientAPI;
59	tony	45	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	tony	56	FSQL: AnsiString;
68			FProcessedSQL: AnsiString;
69	tony	45	FHasParamNames: boolean;
70			FBOF: boolean;
71			FEOF: boolean;
72			FSingleResults: boolean;
73			FGenerateParamNames: boolean;
74			FChangeSeqNo: integer;
75	tony	47	FCollectStatistics: boolean;
76			FStatisticsAvailable: boolean;
77			FBeforeStats: TPerfStatistics;
78			FAfterStats: TPerfStatistics;
79	tony	270	FCaseSensitiveParams: boolean;
80	tony	345	FBatchRowLimit: integer;
81			procedure CheckChangeBatchRowLimit; virtual;
82	tony	45	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	tony	345	function InternalExecute(Transaction: ITransaction): IResults; virtual; abstract;
87	tony	45	function InternalOpenCursor(aTransaction: ITransaction): IResultSet; virtual; abstract;
88	tony	263	procedure ProcessSQL(sql: AnsiString; GenerateParamNames: boolean; var processedSQL: AnsiString); virtual; abstract;
89	tony	45	procedure FreeHandle; virtual; abstract;
90			procedure InternalClose(Force: boolean); virtual; abstract;
91	tony	209	function TimeStampToMSecs(const TimeStamp: TTimeStamp): Int64;
92	tony	45	public
93			constructor Create(Attachment: IAttachment; Transaction: ITransaction;
94	tony	56	sql: AnsiString; SQLDialect: integer);
95	tony	45	constructor CreateWithParameterNames(Attachment: IAttachment; Transaction: ITransaction;
96	tony	270	sql: AnsiString; SQLDialect: integer; GenerateParamNames: boolean =false;
97			CaseSensitiveParams: boolean = false);
98	tony	45	destructor Destroy; override;
99			procedure Close;
100			procedure TransactionEnding(aTransaction: ITransaction; Force: boolean);
101			property SQLDialect: integer read FSQLDialect;
102	tony	263	property FirebirdClientAPI: TFBClientAPI read FFirebirdClientAPI;
103	tony	45
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	tony	345	function GetSQLStatementTypeName: AnsiString;
111	tony	56	function GetSQLText: AnsiString;
112	tony	263	function GetProcessedSQLText: AnsiString;
113	tony	45	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	tony	56	function CreateBlob(paramName: AnsiString): IBlob; overload;
120	tony	45	function CreateBlob(index: integer): IBlob; overload;
121			function CreateBlob(column: TColumnMetaData): IBlob; overload; virtual; abstract;
122	tony	56	function CreateArray(paramName: AnsiString): IArray; overload;
123	tony	45	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	tony	47	procedure EnableStatistics(aValue: boolean);
130			function GetPerfStatistics(var stats: TPerfCounters): boolean;
131	tony	345	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	tony	45	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	tony	345	procedure TFBStatement.CheckChangeBatchRowLimit;
154			begin
155			//Do Nothing
156			end;
157
158	tony	45	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	tony	209	function TFBStatement.TimeStampToMSecs(const TimeStamp: TTimeStamp): Int64;
168			begin
169			Result := TimeStamp.Time + Int64(timestamp.date)*msecsperday;
170			end;
171
172	tony	45	constructor TFBStatement.Create(Attachment: IAttachment;
173	tony	56	Transaction: ITransaction; sql: AnsiString; SQLDialect: integer);
174	tony	45	begin
175			inherited Create(Transaction as TFBTransaction,2);
176			FAttachmentIntf := Attachment;
177			FTransactionIntf := Transaction;
178	tony	263	FFirebirdClientAPI := Attachment.getFirebirdAPI as TFBClientAPI;
179	tony	45	FSQLDialect := SQLDialect;
180			FSQL := sql;
181	tony	345	FBatchRowLimit := DefaultBatchRowLimit;
182	tony	45	end;
183
184			constructor TFBStatement.CreateWithParameterNames(Attachment: IAttachment;
185	tony	56	Transaction: ITransaction; sql: AnsiString; SQLDialect: integer;
186	tony	270	GenerateParamNames: boolean; CaseSensitiveParams: boolean);
187	tony	45	begin
188			FHasParamNames := true;
189			FGenerateParamNames := GenerateParamNames;
190	tony	270	FCaseSensitiveParams := CaseSensitiveParams;
191	tony	45	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	tony	315	if FOpen and ((FExecTransactionIntf as TObject) = (aTransaction as TObject)) then
210	tony	45	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	tony	345	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	tony	56	function TFBStatement.GetSQLText: AnsiString;
279	tony	45	begin
280			Result := FSQL;
281			end;
282
283	tony	263	function TFBStatement.GetProcessedSQLText: AnsiString;
284			begin
285			if FProcessedSQL = '' then
286			ProcessSQL(FSQL,FGenerateParamNames,FProcessedSQL);
287			Result := FProcessedSQL
288			end;
289
290	tony	45	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	tony	345	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	tony	45	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	tony	56	function TFBStatement.CreateBlob(paramName: AnsiString): IBlob;
357	tony	45	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	tony	56	function TFBStatement.CreateArray(paramName: AnsiString): IArray;
373	tony	45	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	tony	263	Result := TSQLInfoResultsBuffer.Create(FFirebirdClientAPI);
401	tony	45	GetDsqlInfo(Request,Result);
402			end;
403
404			procedure TFBStatement.SetRetainInterfaces(aValue: boolean);
405			begin
406			RetainInterfaces := aValue;
407			end;
408
409	tony	47	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	tony	345	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	tony	45	end.
446