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;
    FStaleReferenceChecks: boolean;
    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    FPrepareSeqNo: integer; {used to check for out of date references from interfaces}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);
    {Stale Reference Check}
    procedure SetStaleReferenceChecks(Enable:boolean); {default true}
    function GetStaleReferenceChecks: boolean;
  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;
  FStaleReferenceChecks := true;
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;

procedure TFBStatement.SetStaleReferenceChecks(Enable: boolean);
begin
  FStaleReferenceChecks := Enable;
end;

function TFBStatement.GetStaleReferenceChecks: boolean;
begin
  Result := FStaleReferenceChecks;
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:	347
Committed:	Mon Sep 20 22:08:20 2021 UTC (3 years, 2 months ago) by tony
Content type:	text/x-pascal
Original Path:	*ibx/trunk/fbintf/client/FBStatement.pas*
File size:	14002 byte(s)
Log Message:	Updated Merged
#	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	tony	347	FStaleReferenceChecks: boolean;
63	tony	45	FSQLStatementType: TIBSQLStatementTypes; { Select, update, delete, insert, create, alter, etc...}
64			FSQLDialect: integer;
65			FOpen: boolean;
66			FPrepared: boolean;
67			FPrepareSeqNo: integer; {used to check for out of date references from interfaces}
68	tony	56	FSQL: AnsiString;
69			FProcessedSQL: AnsiString;
70	tony	45	FHasParamNames: boolean;
71			FBOF: boolean;
72			FEOF: boolean;
73			FSingleResults: boolean;
74			FGenerateParamNames: boolean;
75			FChangeSeqNo: integer;
76	tony	47	FCollectStatistics: boolean;
77			FStatisticsAvailable: boolean;
78			FBeforeStats: TPerfStatistics;
79			FAfterStats: TPerfStatistics;
80	tony	270	FCaseSensitiveParams: boolean;
81	tony	345	FBatchRowLimit: integer;
82			procedure CheckChangeBatchRowLimit; virtual;
83	tony	45	procedure CheckHandle; virtual; abstract;
84			procedure CheckTransaction(aTransaction: ITransaction);
85			procedure GetDsqlInfo(info_request: byte; buffer: ISQLInfoResults); overload; virtual; abstract;
86			procedure InternalPrepare; virtual; abstract;
87	tony	345	function InternalExecute(Transaction: ITransaction): IResults; virtual; abstract;
88	tony	45	function InternalOpenCursor(aTransaction: ITransaction): IResultSet; virtual; abstract;
89	tony	263	procedure ProcessSQL(sql: AnsiString; GenerateParamNames: boolean; var processedSQL: AnsiString); virtual; abstract;
90	tony	45	procedure FreeHandle; virtual; abstract;
91			procedure InternalClose(Force: boolean); virtual; abstract;
92	tony	209	function TimeStampToMSecs(const TimeStamp: TTimeStamp): Int64;
93	tony	45	public
94			constructor Create(Attachment: IAttachment; Transaction: ITransaction;
95	tony	56	sql: AnsiString; SQLDialect: integer);
96	tony	45	constructor CreateWithParameterNames(Attachment: IAttachment; Transaction: ITransaction;
97	tony	270	sql: AnsiString; SQLDialect: integer; GenerateParamNames: boolean =false;
98			CaseSensitiveParams: boolean = false);
99	tony	45	destructor Destroy; override;
100			procedure Close;
101			procedure TransactionEnding(aTransaction: ITransaction; Force: boolean);
102			property SQLDialect: integer read FSQLDialect;
103	tony	263	property FirebirdClientAPI: TFBClientAPI read FFirebirdClientAPI;
104	tony	45
105			public
106			function GetSQLParams: ISQLParams; virtual; abstract;
107			function GetMetaData: IMetaData; virtual; abstract;
108			function GetRowsAffected(var SelectCount, InsertCount, UpdateCount,
109			DeleteCount: integer): boolean;
110			function GetSQLStatementType: TIBSQLStatementTypes;
111	tony	345	function GetSQLStatementTypeName: AnsiString;
112	tony	56	function GetSQLText: AnsiString;
113	tony	263	function GetProcessedSQLText: AnsiString;
114	tony	45	function GetSQLDialect: integer;
115
116			{GetDSQLInfo only supports isc_info_sql_stmt_type, isc_info_sql_get_plan, isc_info_sql_records}
117			procedure Prepare(aTransaction: ITransaction=nil); virtual;
118			function Execute(aTransaction: ITransaction=nil): IResults;
119			function OpenCursor(aTransaction: ITransaction=nil): IResultSet;
120	tony	56	function CreateBlob(paramName: AnsiString): IBlob; overload;
121	tony	45	function CreateBlob(index: integer): IBlob; overload;
122			function CreateBlob(column: TColumnMetaData): IBlob; overload; virtual; abstract;
123	tony	56	function CreateArray(paramName: AnsiString): IArray; overload;
124	tony	45	function CreateArray(index: integer): IArray; overload;
125			function CreateArray(column: TColumnMetaData): IArray; overload; virtual; abstract;
126			function GetAttachment: IAttachment;
127			function GetTransaction: ITransaction;
128			function GetDSQLInfo(Request: byte): ISQLInfoResults; overload;
129			procedure SetRetainInterfaces(aValue: boolean); virtual;
130	tony	47	procedure EnableStatistics(aValue: boolean);
131			function GetPerfStatistics(var stats: TPerfCounters): boolean;
132	tony	345	function IsInBatchMode: boolean; virtual;
133			function HasBatchMode: boolean; virtual;
134			public
135			{IBatch support}
136			procedure AddToBatch; virtual;
137			function ExecuteBatch(aTransaction: ITransaction): IBatchCompletion; virtual;
138			procedure CancelBatch; virtual;
139			function GetBatchCompletion: IBatchCompletion; virtual;
140			function GetBatchRowLimit: integer;
141			procedure SetBatchRowLimit(aLimit: integer);
142	tony	347	{Stale Reference Check}
143			procedure SetStaleReferenceChecks(Enable:boolean); {default true}
144			function GetStaleReferenceChecks: boolean;
145	tony	345	public
146	tony	45	property ChangeSeqNo: integer read FChangeSeqNo;
147			property SQLParams: ISQLParams read GetSQLParams;
148			property SQLStatementType: TIBSQLStatementTypes read GetSQLStatementType;
149			end;
150
151			implementation
152
153			uses FBMessages;
154
155			{ TFBStatement }
156
157	tony	345	procedure TFBStatement.CheckChangeBatchRowLimit;
158			begin
159			//Do Nothing
160			end;
161
162	tony	45	procedure TFBStatement.CheckTransaction(aTransaction: ITransaction);
163			begin
164			if (aTransaction = nil) then
165			IBError(ibxeTransactionNotAssigned,[]);
166
167			if not aTransaction.InTransaction then
168			IBError(ibxeNotInTransaction,[]);
169			end;
170
171	tony	209	function TFBStatement.TimeStampToMSecs(const TimeStamp: TTimeStamp): Int64;
172			begin
173			Result := TimeStamp.Time + Int64(timestamp.date)*msecsperday;
174			end;
175
176	tony	45	constructor TFBStatement.Create(Attachment: IAttachment;
177	tony	56	Transaction: ITransaction; sql: AnsiString; SQLDialect: integer);
178	tony	45	begin
179			inherited Create(Transaction as TFBTransaction,2);
180			FAttachmentIntf := Attachment;
181			FTransactionIntf := Transaction;
182	tony	263	FFirebirdClientAPI := Attachment.getFirebirdAPI as TFBClientAPI;
183	tony	45	FSQLDialect := SQLDialect;
184			FSQL := sql;
185	tony	345	FBatchRowLimit := DefaultBatchRowLimit;
186	tony	347	FStaleReferenceChecks := true;
187	tony	45	end;
188
189			constructor TFBStatement.CreateWithParameterNames(Attachment: IAttachment;
190	tony	56	Transaction: ITransaction; sql: AnsiString; SQLDialect: integer;
191	tony	270	GenerateParamNames: boolean; CaseSensitiveParams: boolean);
192	tony	45	begin
193			FHasParamNames := true;
194			FGenerateParamNames := GenerateParamNames;
195	tony	270	FCaseSensitiveParams := CaseSensitiveParams;
196	tony	45	Create(Attachment,Transaction,sql,SQLDialect);
197			end;
198
199			destructor TFBStatement.Destroy;
200			begin
201			Close;
202			FreeHandle;
203			inherited Destroy;
204			end;
205
206			procedure TFBStatement.Close;
207			begin
208			InternalClose(false);
209			end;
210
211			procedure TFBStatement.TransactionEnding(aTransaction: ITransaction;
212			Force: boolean);
213			begin
214	tony	315	if FOpen and ((FExecTransactionIntf as TObject) = (aTransaction as TObject)) then
215	tony	45	InternalClose(Force);
216
217			if FTransactionIntf = aTransaction then
218			begin
219			FreeHandle;
220			FPrepared := false;
221			end;
222			end;
223
224			function TFBStatement.GetRowsAffected(var SelectCount, InsertCount,
225			UpdateCount, DeleteCount: integer): boolean;
226			var
227			RB: ISQLInfoResults;
228			i, j: integer;
229			begin
230			InsertCount := 0;
231			UpdateCount := 0;
232			DeleteCount := 0;
233			Result := FPrepared;
234			if not Result then Exit;
235
236			RB := GetDsqlInfo(isc_info_sql_records);
237
238			for i := 0 to RB.Count - 1 do
239			with RB[i] do
240			case getItemType of
241			isc_info_sql_records:
242			for j := 0 to Count -1 do
243			with Items[j] do
244			case getItemType of
245			isc_info_req_select_count:
246			SelectCount := GetAsInteger;
247			isc_info_req_insert_count:
248			InsertCount := GetAsInteger;
249			isc_info_req_update_count:
250			UpdateCount := GetAsInteger;
251			isc_info_req_delete_count:
252			DeleteCount := GetAsInteger;
253			end;
254			end;
255			end;
256
257			function TFBStatement.GetSQLStatementType: TIBSQLStatementTypes;
258			begin
259			Result := FSQLStatementType;
260			end;
261
262	tony	345	function TFBStatement.GetSQLStatementTypeName: AnsiString;
263			begin
264			case FSQLStatementType of
265			SQLUnknown: Result := 'SQL_Unknown';
266			SQLSelect: Result := 'SQL_Select';
267			SQLInsert: Result := 'SQL_Insert';
268			SQLUpdate: Result := 'SQL_Update';
269			SQLDelete: Result := 'SQL_Delete';
270			SQLDDL: Result := 'SQL_DDL';
271			SQLGetSegment: Result := 'SQL_GetSegment';
272			SQLPutSegment: Result := 'SQL_PutSegment';
273			SQLExecProcedure: Result := 'SQL_ExecProcedure';
274			SQLStartTransaction: Result := 'SQL_StartTransaction';
275			SQLCommit: Result := 'SQL_Commit';
276			SQLRollback: Result := 'SQL_Rollback';
277			SQLSelectForUpdate: Result := 'SQL_SelectForUpdate';
278			SQLSetGenerator: Result := 'SQL_SetGenerator';
279			SQLSavePoint: Result := 'SQL_SavePoint';
280			end;
281			end;
282
283	tony	56	function TFBStatement.GetSQLText: AnsiString;
284	tony	45	begin
285			Result := FSQL;
286			end;
287
288	tony	263	function TFBStatement.GetProcessedSQLText: AnsiString;
289			begin
290			if FProcessedSQL = '' then
291			ProcessSQL(FSQL,FGenerateParamNames,FProcessedSQL);
292			Result := FProcessedSQL
293			end;
294
295	tony	45	function TFBStatement.GetSQLDialect: integer;
296			begin
297			Result := FSQLDialect;
298			end;
299
300			procedure TFBStatement.Prepare(aTransaction: ITransaction);
301			begin
302			if FPrepared then FreeHandle;
303			if aTransaction <> nil then
304			begin
305			RemoveMonitor(FTransactionIntf as TFBTransaction);
306			FTransactionIntf := aTransaction;
307			AddMonitor(FTransactionIntf as TFBTransaction);
308			end;
309			InternalPrepare;
310			end;
311
312			function TFBStatement.Execute(aTransaction: ITransaction): IResults;
313			begin
314			if aTransaction = nil then
315			Result := InternalExecute(FTransactionIntf)
316			else
317			Result := InternalExecute(aTransaction);
318			end;
319
320	tony	345	procedure TFBStatement.AddToBatch;
321			begin
322			IBError(ibxeBatchModeNotSupported,[]);
323			end;
324
325			function TFBStatement.ExecuteBatch(aTransaction: ITransaction
326			): IBatchCompletion;
327			begin
328			IBError(ibxeBatchModeNotSupported,[]);
329			end;
330
331			procedure TFBStatement.CancelBatch;
332			begin
333			IBError(ibxeBatchModeNotSupported,[]);
334			end;
335
336			function TFBStatement.GetBatchCompletion: IBatchCompletion;
337			begin
338			IBError(ibxeBatchModeNotSupported,[]);
339			end;
340
341			function TFBStatement.GetBatchRowLimit: integer;
342			begin
343			Result := FBatchRowLimit;
344			end;
345
346			procedure TFBStatement.SetBatchRowLimit(aLimit: integer);
347			begin
348			CheckChangeBatchRowLimit;
349			FBatchRowLimit := aLimit;
350			end;
351
352	tony	347	procedure TFBStatement.SetStaleReferenceChecks(Enable: boolean);
353			begin
354			FStaleReferenceChecks := Enable;
355			end;
356
357			function TFBStatement.GetStaleReferenceChecks: boolean;
358			begin
359			Result := FStaleReferenceChecks;
360			end;
361
362	tony	45	function TFBStatement.OpenCursor(aTransaction: ITransaction): IResultSet;
363			begin
364			Close;
365			if aTransaction = nil then
366			Result := InternalOpenCursor(FTransactionIntf)
367			else
368			Result := InternalOpenCursor(aTransaction);
369			end;
370
371	tony	56	function TFBStatement.CreateBlob(paramName: AnsiString): IBlob;
372	tony	45	var column: TColumnMetaData;
373			begin
374			InternalPrepare;
375			column := SQLParams.ByName(paramName) as TSQLParam;
376			if column = nil then
377			IBError(ibxeFieldNotFound,[paramName]);
378			Result := CreateBlob(column);
379			end;
380
381			function TFBStatement.CreateBlob(index: integer): IBlob;
382			begin
383			InternalPrepare;
384			Result := CreateBlob(SQLParams[index] as TSQLParam);
385			end;
386
387	tony	56	function TFBStatement.CreateArray(paramName: AnsiString): IArray;
388	tony	45	var column: TColumnMetaData;
389			begin
390			InternalPrepare;
391			column := SQLParams.ByName(paramName) as TSQLParam;
392			if column = nil then
393			IBError(ibxeFieldNotFound,[paramName]);
394			Result := CreateArray(column);
395			end;
396
397			function TFBStatement.CreateArray(index: integer): IArray;
398			begin
399			InternalPrepare;
400			Result := CreateArray(SQLParams[index] as TSQLParam);
401			end;
402
403			function TFBStatement.GetAttachment: IAttachment;
404			begin
405			Result := FAttachmentIntf;
406			end;
407
408			function TFBStatement.GetTransaction: ITransaction;
409			begin
410			Result := FTransactionIntf
411			end;
412
413			function TFBStatement.GetDSQLInfo(Request: byte): ISQLInfoResults;
414			begin
415	tony	263	Result := TSQLInfoResultsBuffer.Create(FFirebirdClientAPI);
416	tony	45	GetDsqlInfo(Request,Result);
417			end;
418
419			procedure TFBStatement.SetRetainInterfaces(aValue: boolean);
420			begin
421			RetainInterfaces := aValue;
422			end;
423
424	tony	47	procedure TFBStatement.EnableStatistics(aValue: boolean);
425			begin
426			if FCollectStatistics <> aValue then
427			begin
428			FCollectStatistics := aValue;
429			FStatisticsAvailable := false;
430			end;
431			end;
432
433			function TFBStatement.GetPerfStatistics(var stats: TPerfCounters): boolean;
434			begin
435			Result := FStatisticsAvailable;
436			if Result then
437			begin
438			stats[psCurrentMemory] := FAfterStats[psCurrentMemory];
439			stats[psDeltaMemory] := FAfterStats[psCurrentMemory] - FBeforeStats[psCurrentMemory];
440			stats[psMaxMemory] := FAfterStats[psMaxMemory];
441			stats[psRealTime] := FAfterStats[psRealTime] - FBeforeStats[psRealTime];
442			stats[psUserTime] := FAfterStats[psUserTime] - FBeforeStats[psUserTime];
443			stats[psReads] := FAfterStats[psReads] - FBeforeStats[psReads];
444			stats[psWrites] := FAfterStats[psWrites] - FBeforeStats[psWrites];
445			stats[psFetches] := FAfterStats[psFetches] - FBeforeStats[psFetches];
446			stats[psBuffers] := FAfterStats[psBuffers];
447			end;
448			end;
449
450	tony	345	function TFBStatement.IsInBatchMode: boolean;
451			begin
452			Result := false;
453			end;
454
455			function TFBStatement.HasBatchMode: boolean;
456			begin
457			Result := false;
458			end;
459
460	tony	45	end.
461