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    FPrepareSeqNo: integer; {used to check for out of date references from interfaces}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(CursorName: AnsiString='');  virtual; abstract;
    function InternalExecute(Transaction: ITransaction): IResults;  virtual; abstract;
    function InternalOpenCursor(aTransaction: ITransaction; Scrollable: boolean): 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);  overload;
    procedure Prepare(CursorName: AnsiString; aTransaction: ITransaction=nil); overload; virtual;
    function Execute(aTransaction: ITransaction=nil): IResults;
    function OpenCursor(aTransaction: ITransaction=nil): IResultSet; overload;
    function OpenCursor(Scrollable: boolean; aTransaction: ITransaction=nil): IResultSet; overload;
    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
  Prepare('',aTransaction);
end;

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

function TFBStatement.OpenCursor(Scrollable: boolean; aTransaction: ITransaction
  ): IResultSet;
begin
  Close;
  if aTransaction = nil then
    Result := InternalOpenCursor(FTransactionIntf,Scrollable)
  else
    Result := InternalOpenCursor(aTransaction,Scrollable);
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:	350
Committed:	Wed Oct 20 14:58:56 2021 UTC (2 years, 5 months ago) by tony
Content type:	text/x-pascal
Original Path:	*ibx/trunk/fbintf/client/FBStatement.pas*
File size:	14574 byte(s)
Log Message:	Fixed Merged
#	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	FStaleReferenceChecks: boolean;
63	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	FSQL: AnsiString;
69	FProcessedSQL: AnsiString;
70	FHasParamNames: boolean;
71	FBOF: boolean;
72	FEOF: boolean;
73	FSingleResults: boolean;
74	FGenerateParamNames: boolean;
75	FChangeSeqNo: integer;
76	FCollectStatistics: boolean;
77	FStatisticsAvailable: boolean;
78	FBeforeStats: TPerfStatistics;
79	FAfterStats: TPerfStatistics;
80	FCaseSensitiveParams: boolean;
81	FBatchRowLimit: integer;
82	procedure CheckChangeBatchRowLimit; virtual;
83	procedure CheckHandle; virtual; abstract;
84	procedure CheckTransaction(aTransaction: ITransaction);
85	procedure GetDsqlInfo(info_request: byte; buffer: ISQLInfoResults); overload; virtual; abstract;
86	procedure InternalPrepare(CursorName: AnsiString=''); virtual; abstract;
87	function InternalExecute(Transaction: ITransaction): IResults; virtual; abstract;
88	function InternalOpenCursor(aTransaction: ITransaction; Scrollable: boolean): IResultSet; virtual; abstract;
89	procedure ProcessSQL(sql: AnsiString; GenerateParamNames: boolean; var processedSQL: AnsiString); virtual; abstract;
90	procedure FreeHandle; virtual; abstract;
91	procedure InternalClose(Force: boolean); virtual; abstract;
92	function TimeStampToMSecs(const TimeStamp: TTimeStamp): Int64;
93	public
94	constructor Create(Attachment: IAttachment; Transaction: ITransaction;
95	sql: AnsiString; SQLDialect: integer);
96	constructor CreateWithParameterNames(Attachment: IAttachment; Transaction: ITransaction;
97	sql: AnsiString; SQLDialect: integer; GenerateParamNames: boolean =false;
98	CaseSensitiveParams: boolean = false);
99	destructor Destroy; override;
100	procedure Close;
101	procedure TransactionEnding(aTransaction: ITransaction; Force: boolean);
102	property SQLDialect: integer read FSQLDialect;
103	property FirebirdClientAPI: TFBClientAPI read FFirebirdClientAPI;
104
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	function GetSQLStatementTypeName: AnsiString;
112	function GetSQLText: AnsiString;
113	function GetProcessedSQLText: AnsiString;
114	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); overload;
118	procedure Prepare(CursorName: AnsiString; aTransaction: ITransaction=nil); overload; virtual;
119	function Execute(aTransaction: ITransaction=nil): IResults;
120	function OpenCursor(aTransaction: ITransaction=nil): IResultSet; overload;
121	function OpenCursor(Scrollable: boolean; aTransaction: ITransaction=nil): IResultSet; overload;
122	function CreateBlob(paramName: AnsiString): IBlob; overload;
123	function CreateBlob(index: integer): IBlob; overload;
124	function CreateBlob(column: TColumnMetaData): IBlob; overload; virtual; abstract;
125	function CreateArray(paramName: AnsiString): IArray; overload;
126	function CreateArray(index: integer): IArray; overload;
127	function CreateArray(column: TColumnMetaData): IArray; overload; virtual; abstract;
128	function GetAttachment: IAttachment;
129	function GetTransaction: ITransaction;
130	function GetDSQLInfo(Request: byte): ISQLInfoResults; overload;
131	procedure SetRetainInterfaces(aValue: boolean); virtual;
132	procedure EnableStatistics(aValue: boolean);
133	function GetPerfStatistics(var stats: TPerfCounters): boolean;
134	function IsInBatchMode: boolean; virtual;
135	function HasBatchMode: boolean; virtual;
136	public
137	{IBatch support}
138	procedure AddToBatch; virtual;
139	function ExecuteBatch(aTransaction: ITransaction): IBatchCompletion; virtual;
140	procedure CancelBatch; virtual;
141	function GetBatchCompletion: IBatchCompletion; virtual;
142	function GetBatchRowLimit: integer;
143	procedure SetBatchRowLimit(aLimit: integer);
144	{Stale Reference Check}
145	procedure SetStaleReferenceChecks(Enable:boolean); {default true}
146	function GetStaleReferenceChecks: boolean;
147	public
148	property ChangeSeqNo: integer read FChangeSeqNo;
149	property SQLParams: ISQLParams read GetSQLParams;
150	property SQLStatementType: TIBSQLStatementTypes read GetSQLStatementType;
151	end;
152
153	implementation
154
155	uses FBMessages;
156
157	{ TFBStatement }
158
159	procedure TFBStatement.CheckChangeBatchRowLimit;
160	begin
161	//Do Nothing
162	end;
163
164	procedure TFBStatement.CheckTransaction(aTransaction: ITransaction);
165	begin
166	if (aTransaction = nil) then
167	IBError(ibxeTransactionNotAssigned,[]);
168
169	if not aTransaction.InTransaction then
170	IBError(ibxeNotInTransaction,[]);
171	end;
172
173	function TFBStatement.TimeStampToMSecs(const TimeStamp: TTimeStamp): Int64;
174	begin
175	Result := TimeStamp.Time + Int64(timestamp.date)*msecsperday;
176	end;
177
178	constructor TFBStatement.Create(Attachment: IAttachment;
179	Transaction: ITransaction; sql: AnsiString; SQLDialect: integer);
180	begin
181	inherited Create(Transaction as TFBTransaction,2);
182	FAttachmentIntf := Attachment;
183	FTransactionIntf := Transaction;
184	FFirebirdClientAPI := Attachment.getFirebirdAPI as TFBClientAPI;
185	FSQLDialect := SQLDialect;
186	FSQL := sql;
187	FBatchRowLimit := DefaultBatchRowLimit;
188	FStaleReferenceChecks := true;
189	end;
190
191	constructor TFBStatement.CreateWithParameterNames(Attachment: IAttachment;
192	Transaction: ITransaction; sql: AnsiString; SQLDialect: integer;
193	GenerateParamNames: boolean; CaseSensitiveParams: boolean);
194	begin
195	FHasParamNames := true;
196	FGenerateParamNames := GenerateParamNames;
197	FCaseSensitiveParams := CaseSensitiveParams;
198	Create(Attachment,Transaction,sql,SQLDialect);
199	end;
200
201	destructor TFBStatement.Destroy;
202	begin
203	Close;
204	FreeHandle;
205	inherited Destroy;
206	end;
207
208	procedure TFBStatement.Close;
209	begin
210	InternalClose(false);
211	end;
212
213	procedure TFBStatement.TransactionEnding(aTransaction: ITransaction;
214	Force: boolean);
215	begin
216	if FOpen and ((FExecTransactionIntf as TObject) = (aTransaction as TObject)) then
217	InternalClose(Force);
218
219	if FTransactionIntf = aTransaction then
220	begin
221	FreeHandle;
222	FPrepared := false;
223	end;
224	end;
225
226	function TFBStatement.GetRowsAffected(var SelectCount, InsertCount,
227	UpdateCount, DeleteCount: integer): boolean;
228	var
229	RB: ISQLInfoResults;
230	i, j: integer;
231	begin
232	InsertCount := 0;
233	UpdateCount := 0;
234	DeleteCount := 0;
235	Result := FPrepared;
236	if not Result then Exit;
237
238	RB := GetDsqlInfo(isc_info_sql_records);
239
240	for i := 0 to RB.Count - 1 do
241	with RB[i] do
242	case getItemType of
243	isc_info_sql_records:
244	for j := 0 to Count -1 do
245	with Items[j] do
246	case getItemType of
247	isc_info_req_select_count:
248	SelectCount := GetAsInteger;
249	isc_info_req_insert_count:
250	InsertCount := GetAsInteger;
251	isc_info_req_update_count:
252	UpdateCount := GetAsInteger;
253	isc_info_req_delete_count:
254	DeleteCount := GetAsInteger;
255	end;
256	end;
257	end;
258
259	function TFBStatement.GetSQLStatementType: TIBSQLStatementTypes;
260	begin
261	Result := FSQLStatementType;
262	end;
263
264	function TFBStatement.GetSQLStatementTypeName: AnsiString;
265	begin
266	case FSQLStatementType of
267	SQLUnknown: Result := 'SQL_Unknown';
268	SQLSelect: Result := 'SQL_Select';
269	SQLInsert: Result := 'SQL_Insert';
270	SQLUpdate: Result := 'SQL_Update';
271	SQLDelete: Result := 'SQL_Delete';
272	SQLDDL: Result := 'SQL_DDL';
273	SQLGetSegment: Result := 'SQL_GetSegment';
274	SQLPutSegment: Result := 'SQL_PutSegment';
275	SQLExecProcedure: Result := 'SQL_ExecProcedure';
276	SQLStartTransaction: Result := 'SQL_StartTransaction';
277	SQLCommit: Result := 'SQL_Commit';
278	SQLRollback: Result := 'SQL_Rollback';
279	SQLSelectForUpdate: Result := 'SQL_SelectForUpdate';
280	SQLSetGenerator: Result := 'SQL_SetGenerator';
281	SQLSavePoint: Result := 'SQL_SavePoint';
282	end;
283	end;
284
285	function TFBStatement.GetSQLText: AnsiString;
286	begin
287	Result := FSQL;
288	end;
289
290	function TFBStatement.GetProcessedSQLText: AnsiString;
291	begin
292	if FProcessedSQL = '' then
293	ProcessSQL(FSQL,FGenerateParamNames,FProcessedSQL);
294	Result := FProcessedSQL
295	end;
296
297	function TFBStatement.GetSQLDialect: integer;
298	begin
299	Result := FSQLDialect;
300	end;
301
302	procedure TFBStatement.Prepare(aTransaction: ITransaction);
303	begin
304	Prepare('',aTransaction);
305	end;
306
307	procedure TFBStatement.Prepare(CursorName: AnsiString;
308	aTransaction: ITransaction);
309	begin
310	if FPrepared then FreeHandle;
311	if aTransaction <> nil then
312	begin
313	RemoveMonitor(FTransactionIntf as TFBTransaction);
314	FTransactionIntf := aTransaction;
315	AddMonitor(FTransactionIntf as TFBTransaction);
316	end;
317	InternalPrepare(CursorName);
318	end;
319
320	function TFBStatement.Execute(aTransaction: ITransaction): IResults;
321	begin
322	if aTransaction = nil then
323	Result := InternalExecute(FTransactionIntf)
324	else
325	Result := InternalExecute(aTransaction);
326	end;
327
328	procedure TFBStatement.AddToBatch;
329	begin
330	IBError(ibxeBatchModeNotSupported,[]);
331	end;
332
333	function TFBStatement.ExecuteBatch(aTransaction: ITransaction
334	): IBatchCompletion;
335	begin
336	IBError(ibxeBatchModeNotSupported,[]);
337	end;
338
339	procedure TFBStatement.CancelBatch;
340	begin
341	IBError(ibxeBatchModeNotSupported,[]);
342	end;
343
344	function TFBStatement.GetBatchCompletion: IBatchCompletion;
345	begin
346	IBError(ibxeBatchModeNotSupported,[]);
347	end;
348
349	function TFBStatement.GetBatchRowLimit: integer;
350	begin
351	Result := FBatchRowLimit;
352	end;
353
354	procedure TFBStatement.SetBatchRowLimit(aLimit: integer);
355	begin
356	CheckChangeBatchRowLimit;
357	FBatchRowLimit := aLimit;
358	end;
359
360	procedure TFBStatement.SetStaleReferenceChecks(Enable: boolean);
361	begin
362	FStaleReferenceChecks := Enable;
363	end;
364
365	function TFBStatement.GetStaleReferenceChecks: boolean;
366	begin
367	Result := FStaleReferenceChecks;
368	end;
369
370	function TFBStatement.OpenCursor(aTransaction: ITransaction): IResultSet;
371	begin
372	Result := OpenCursor(false,aTransaction);
373	end;
374
375	function TFBStatement.OpenCursor(Scrollable: boolean; aTransaction: ITransaction
376	): IResultSet;
377	begin
378	Close;
379	if aTransaction = nil then
380	Result := InternalOpenCursor(FTransactionIntf,Scrollable)
381	else
382	Result := InternalOpenCursor(aTransaction,Scrollable);
383	end;
384
385	function TFBStatement.CreateBlob(paramName: AnsiString): IBlob;
386	var column: TColumnMetaData;
387	begin
388	InternalPrepare;
389	column := SQLParams.ByName(paramName) as TSQLParam;
390	if column = nil then
391	IBError(ibxeFieldNotFound,[paramName]);
392	Result := CreateBlob(column);
393	end;
394
395	function TFBStatement.CreateBlob(index: integer): IBlob;
396	begin
397	InternalPrepare;
398	Result := CreateBlob(SQLParams[index] as TSQLParam);
399	end;
400
401	function TFBStatement.CreateArray(paramName: AnsiString): IArray;
402	var column: TColumnMetaData;
403	begin
404	InternalPrepare;
405	column := SQLParams.ByName(paramName) as TSQLParam;
406	if column = nil then
407	IBError(ibxeFieldNotFound,[paramName]);
408	Result := CreateArray(column);
409	end;
410
411	function TFBStatement.CreateArray(index: integer): IArray;
412	begin
413	InternalPrepare;
414	Result := CreateArray(SQLParams[index] as TSQLParam);
415	end;
416
417	function TFBStatement.GetAttachment: IAttachment;
418	begin
419	Result := FAttachmentIntf;
420	end;
421
422	function TFBStatement.GetTransaction: ITransaction;
423	begin
424	Result := FTransactionIntf
425	end;
426
427	function TFBStatement.GetDSQLInfo(Request: byte): ISQLInfoResults;
428	begin
429	Result := TSQLInfoResultsBuffer.Create(FFirebirdClientAPI);
430	GetDsqlInfo(Request,Result);
431	end;
432
433	procedure TFBStatement.SetRetainInterfaces(aValue: boolean);
434	begin
435	RetainInterfaces := aValue;
436	end;
437
438	procedure TFBStatement.EnableStatistics(aValue: boolean);
439	begin
440	if FCollectStatistics <> aValue then
441	begin
442	FCollectStatistics := aValue;
443	FStatisticsAvailable := false;
444	end;
445	end;
446
447	function TFBStatement.GetPerfStatistics(var stats: TPerfCounters): boolean;
448	begin
449	Result := FStatisticsAvailable;
450	if Result then
451	begin
452	stats[psCurrentMemory] := FAfterStats[psCurrentMemory];
453	stats[psDeltaMemory] := FAfterStats[psCurrentMemory] - FBeforeStats[psCurrentMemory];
454	stats[psMaxMemory] := FAfterStats[psMaxMemory];
455	stats[psRealTime] := FAfterStats[psRealTime] - FBeforeStats[psRealTime];
456	stats[psUserTime] := FAfterStats[psUserTime] - FBeforeStats[psUserTime];
457	stats[psReads] := FAfterStats[psReads] - FBeforeStats[psReads];
458	stats[psWrites] := FAfterStats[psWrites] - FBeforeStats[psWrites];
459	stats[psFetches] := FAfterStats[psFetches] - FBeforeStats[psFetches];
460	stats[psBuffers] := FAfterStats[psBuffers];
461	end;
462	end;
463
464	function TFBStatement.IsInBatchMode: boolean;
465	begin
466	Result := false;
467	end;
468
469	function TFBStatement.HasBatchMode: boolean;
470	begin
471	Result := false;
472	end;
473
474	end.
475