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Comparing ibx/trunk/fbintf/client/FBAttachment.pas (file contents):
Revision 117 by tony, Mon Jan 22 13:58:11 2018 UTC vs.
Revision 315 by tony, Thu Feb 25 11:56:36 2021 UTC

#	Line 32 | Line 32 | unit FBAttachment;
32		{$IFDEF FPC}
33		{$mode delphi}
34		{$interfaces COM}
35	+	{$define HASREQEX}
36		{$ENDIF}
37
38		interface
39
40		uses
41	<	Classes, SysUtils, {$IFDEF WINDOWS} windows, {$ENDIF} IB,  FBParamBlock, FBActivityMonitor;
41	>	Classes, SysUtils, {$IFDEF WINDOWS} windows, {$ENDIF} IB,  FBParamBlock,
42	>	FBActivityMonitor, FBClientAPI;
43
44		type
45		TCharsetMap = record
#	Line 57 | Line 59 | type
59		FODSMajorVersion: integer;
60		FODSMinorVersion: integer;
61		FUserCharSetMap: array of TCharSetMap;
62	+	FSecDatabase: AnsiString;
63		protected
64		FDatabaseName: AnsiString;
65		FRaiseExceptionOnConnectError: boolean;
#	Line 65 | Line 68 | type
68		FCharSetID: integer;
69		FCodePage: TSystemCodePage;
70		FRemoteProtocol: AnsiString;
71	<	constructor Create(DatabaseName: AnsiString; DPB: IDPB;
71	>	FAuthMethod: AnsiString;
72	>	constructor Create(api: TFBClientAPI; DatabaseName: AnsiString; DPB: IDPB;
73		RaiseExceptionOnConnectError: boolean);
74		procedure CheckHandle; virtual; abstract;
75		function GenerateCreateDatabaseSQL(DatabaseName: AnsiString; aDPB: IDPB): AnsiString;
76		procedure GetODSAndConnectionInfo;
77	+	function GetDBInfo(ReqBuffer: PByte; ReqBufLen: integer): IDBInformation; virtual; abstract;
78		function IsConnected: boolean; virtual; abstract;
79		procedure EndAllTransactions;
80		procedure DPBFromCreateSQL(CreateSQL: AnsiString);
81		procedure SetParameters(SQLParams: ISQLParams; params: array of const);
82	+	procedure UseServerICUChanged; virtual;
83		public
84		destructor Destroy; override;
85	+	function getFirebirdAPI: IFirebirdAPI;
86		function getDPB: IDPB;
87		function AllocateBPB: IBPB;
88	+	function AllocateDIRB: IDIRB;
89		function StartTransaction(TPB: array of byte; DefaultCompletion: TTransactionCompletion): ITransaction; overload; virtual; abstract;
90		function StartTransaction(TPB: ITPB; DefaultCompletion: TTransactionCompletion): ITransaction; overload; virtual; abstract;
91		procedure Disconnect(Force: boolean=false); virtual; abstract;
#	Line 107 | Line 115 | type
115		function Prepare(transaction: ITransaction; sql: AnsiString; aSQLDialect: integer): IStatement; overload; virtual; abstract;
116		function Prepare(transaction: ITransaction; sql: AnsiString): IStatement; overload;
117		function PrepareWithNamedParameters(transaction: ITransaction; sql: AnsiString;
118	<	aSQLDialect: integer; GenerateParamNames: boolean=false): IStatement; overload; virtual; abstract;
118	>	aSQLDialect: integer; GenerateParamNames: boolean=false;
119	>	CaseSensitiveParams: boolean = false): IStatement; overload; virtual; abstract;
120		function PrepareWithNamedParameters(transaction: ITransaction; sql: AnsiString;
121	<	GenerateParamNames: boolean=false): IStatement; overload;
121	>	GenerateParamNames: boolean=false;
122	>	CaseSensitiveParams: boolean = false): IStatement; overload;
123		function GetEventHandler(Events: TStrings): IEvents; overload; virtual; abstract;
124		function GetEventHandler(Event: AnsiString): IEvents; overload;
125
126		function GetSQLDialect: integer;
127	+	function CreateBlob(transaction: ITransaction; RelationName, ColumnName: AnsiString; BPB: IBPB=nil): IBlob; overload;
128	+	function CreateBlob(transaction: ITransaction; BlobMetaData: IBlobMetaData; BPB: IBPB=nil): IBlob; overload; virtual; abstract;
129		function OpenBlob(transaction: ITransaction; BlobMetaData: IBlobMetaData; BlobID: TISC_QUAD; BPB: IBPB=nil): IBlob; overload; virtual; abstract;
130	+	function OpenBlob(transaction: ITransaction; RelationName, ColumnName: AnsiString; BlobID: TISC_QUAD; BPB: IBPB=nil): IBlob; overload;
131		function OpenBlob(transaction: ITransaction; Field: ISQLData; BPB: IBPB=nil): IBlob; overload;
132	+	function CreateArray(transaction: ITransaction; RelationName, ColumnName: AnsiString
133	+	): IArray; overload;
134	+	function CreateArray(transaction: ITransaction; ArrayMetaData: IArrayMetaData): IArray; overload; virtual; abstract;
135	+	function OpenArray(transaction: ITransaction; RelationName, ColumnName: AnsiString; ArrayID: TISC_QUAD): IArray; overload;
136	+	function OpenArray(transaction: ITransaction; ArrayMetaData: IArrayMetaData; ArrayID: TISC_QUAD): IArray; overload; virtual; abstract;
137		property SQLDialect: integer read FSQLDialect;
138		property DPB: IDPB read FDPB;
139	<	public
140	<	function GetDBInformation(Requests: array of byte): IDBInformation; overload; virtual; abstract;
141	<	function GetDBInformation(Request: byte): IDBInformation; overload; virtual; abstract;
142	<	function GetConnectString: AnsiString;
143	<	function GetRemoteProtocol: AnsiString;
144	<	function GetODSMajorVersion: integer;
145	<	function GetODSMinorVersion: integer;
146	<	{Character Sets}
147	<	function HasDefaultCharSet: boolean;
148	<	function GetDefaultCharSetID: integer;
149	<	function GetCharsetName(CharSetID: integer): AnsiString;
150	<	function CharSetID2CodePage(CharSetID: integer; var CodePage: TSystemCodePage): boolean;
151	<	function CodePage2CharSetID(CodePage: TSystemCodePage; var CharSetID: integer): boolean;
152	<	function CharSetName2CharSetID(CharSetName: AnsiString; var CharSetID: integer): boolean;
153	<	function CharSetWidth(CharSetID: integer; var Width: integer): boolean;
154	<	procedure RegisterCharSet(CharSetName: AnsiString; CodePage: TSystemCodePage;
155	<	AllowReverseLookup:boolean; out CharSetID: integer);
156	<	property CharSetID: integer read FCharSetID;
157	<	property CodePage: TSystemCodePage read FCodePage;
139	>	public
140	>	function GetDBInformation(Requests: array of byte): IDBInformation; overload;
141	>	function GetDBInformation(Request: byte): IDBInformation; overload;
142	>	function GetDBInformation(Requests: IDIRB): IDBInformation; overload;
143	>	function GetConnectString: AnsiString;
144	>	function GetRemoteProtocol: AnsiString;
145	>	function GetAuthenticationMethod: AnsiString;
146	>	function GetSecurityDatabase: AnsiString;
147	>	function GetODSMajorVersion: integer;
148	>	function GetODSMinorVersion: integer;
149	>	function HasDecFloatSupport: boolean; virtual;
150	>
151	>	public
152	>	{Character Sets}
153	>	function HasDefaultCharSet: boolean;
154	>	function GetDefaultCharSetID: integer;
155	>	function GetCharsetName(CharSetID: integer): AnsiString;
156	>	function CharSetID2CodePage(CharSetID: integer; var CodePage: TSystemCodePage): boolean;
157	>	function CodePage2CharSetID(CodePage: TSystemCodePage; var CharSetID: integer): boolean;
158	>	function CharSetName2CharSetID(CharSetName: AnsiString; var CharSetID: integer): boolean;
159	>	function CharSetWidth(CharSetID: integer; var Width: integer): boolean;
160	>	procedure RegisterCharSet(CharSetName: AnsiString; CodePage: TSystemCodePage;
161	>	AllowReverseLookup:boolean; out CharSetID: integer);
162	>	function GetBlobMetaData(Transaction: ITransaction; tableName, columnName: AnsiString): IBlobMetaData; virtual; abstract;
163	>	function GetArrayMetaData(Transaction: ITransaction; tableName, columnName: AnsiString): IArrayMetaData; virtual; abstract;
164	>	property CharSetID: integer read FCharSetID;
165	>	property CodePage: TSystemCodePage read FCodePage;
166	>
167	>	public
168	>	{Time Zone Support}
169	>	function GetTimeZoneServices: ITimeZoneServices; virtual;
170	>	function HasTimeZoneSupport: boolean; virtual;
171	>
172	>	end;
173	>
174	>	{ TDPBItem }
175	>
176	>	TDPBItem = class(TParamBlockItem,IDPBItem)
177	>	public
178	>	function getParamTypeName: AnsiString; override;
179	>	end;
180	>
181	>	{ TDPB }
182	>
183	>	TDPB = class (TCustomParamBlock<TDPBItem,IDPBItem>, IDPB)
184	>	protected
185	>	function LookupItemType(ParamTypeName: AnsiString): byte; override;
186	>	public
187	>	constructor Create(api: TFBClientAPI);
188	>	function GetDPBParamTypeName(ParamType: byte): Ansistring;
189		end;
190
191		implementation
192
193	<	uses FBMessages, FBTransaction, RegExpr;
193	>	uses FBMessages, IBUtils, FBTransaction {$IFDEF HASREQEX}, RegExpr{$ENDIF};
194
195		const
196		CharSetMap: array [0..69] of TCharsetMap = (
#	Line 217 | Line 266 | const
266		(CharsetID: 69; CharSetName: 'GB18030'; CharSetWidth: 4; CodePage: 54936; AllowReverseLookup: true)
267		);
268
269	+	const
270	+	isc_dpb_last_dpb_constant = isc_dpb_decfloat_traps;
271	+
272	+	DPBConstantNames: array[1..isc_dpb_last_dpb_constant] of string = (
273	+	'cdd_pathname',
274	+	'allocation',
275	+	'journal',
276	+	'page_size',
277	+	'num_buffers',
278	+	'buffer_length',
279	+	'debug',
280	+	'garbage_collect',
281	+	'verify',
282	+	'sweep',
283	+	'enable_journal',
284	+	'disable_journal',
285	+	'dbkey_scope',
286	+	'number_of_users',
287	+	'trace',
288	+	'no_garbage_collect',
289	+	'damaged',
290	+	'license',
291	+	'sys_user_name',
292	+	'encrypt_key',
293	+	'activate_shadow',
294	+	'sweep_interval',
295	+	'delete_shadow',
296	+	'force_write',
297	+	'begin_log',
298	+	'quit_log',
299	+	'no_reserve',
300	+	'user_name',
301	+	'password',
302	+	'password_enc',
303	+	'sys_user_name_enc',
304	+	'interp',
305	+	'online_dump',
306	+	'old_file_size',
307	+	'old_num_files',
308	+	'old_file',
309	+	'old_start_page',
310	+	'old_start_seqno',
311	+	'old_start_file',
312	+	'drop_walfile',
313	+	'old_dump_id',
314	+	'wal_backup_dir',
315	+	'wal_chkptlen',
316	+	'wal_numbufs',
317	+	'wal_bufsize',
318	+	'wal_grp_cmt_wait',
319	+	'lc_messages',
320	+	'lc_ctype',
321	+	'cache_manager',
322	+	'shutdown',
323	+	'online',
324	+	'shutdown_delay',
325	+	'reserved',
326	+	'overwrite',
327	+	'sec_attach',
328	+	'disable_wal',
329	+	'connect_timeout',
330	+	'dummy_packet_interval',
331	+	'gbak_attach',
332	+	'sql_role_name',
333	+	'set_page_buffers',
334	+	'working_directory',
335	+	'sql_dialect',
336	+	'set_db_readonly',
337	+	'set_db_sql_dialect',
338	+	'gfix_attach',
339	+	'gstat_attach',
340	+	'set_db_charset',
341	+	'gsec_attach',
342	+	'address_path' ,
343	+	'process_id',
344	+	'no_db_triggers',
345	+	'trusted_auth',
346	+	'process_name',
347	+	'trusted_role',
348	+	'org_filename',
349	+	'utf8_ilename',
350	+	'ext_call_depth',
351	+	'auth_block',
352	+	'client_version',
353	+	'remote_protocol',
354	+	'host_name',
355	+	'os_user',
356	+	'specific_auth_data',
357	+	'auth_plugin_list',
358	+	'auth_plugin_name',
359	+	'config',
360	+	'nolinger',
361	+	'reset_icu',
362	+	'map_attach',
363	+	'session_time_zone',
364	+	'set_db_replica',
365	+	'set_bind',
366	+	'decfloat_round',
367	+	'decfloat_traps'
368	+	);
369
370
371
#	Line 243 | Line 392 | begin
392		FSQLDialect := getAsInteger;
393		end;
394
395	<	if (FODSMajorVersion > 11) or ((FODSMajorVersion = 11) and (FODSMinorVersion >= 1)) then
395	>	FCharSetID := 0;
396	>	FRemoteProtocol := '';
397	>	FAuthMethod := 'Legacy_Auth';
398	>	FSecDatabase := 'Default';
399	>	if FODSMajorVersion > 11 then
400	>	begin
401	>	Stmt := Prepare(StartTransaction([isc_tpb_read,isc_tpb_nowait,isc_tpb_concurrency],taCommit),
402	>	'Select MON$CHARACTER_SET_ID, MON$REMOTE_PROTOCOL, MON$AUTH_METHOD, MON$SEC_DATABASE From MON$ATTACHMENTS, MON$DATABASE '+
403	>	'Where MON$ATTACHMENT_ID = CURRENT_CONNECTION ');
404	>	ResultSet := Stmt.OpenCursor;
405	>	if ResultSet.FetchNext then
406	>	begin
407	>	FCharSetID := ResultSet[0].AsInteger;
408	>	FRemoteProtocol := Trim(ResultSet[1].AsString);
409	>	FAuthMethod := Trim(ResultSet[2].AsString);
410	>	FSecDatabase := Trim(ResultSet[3].AsString);
411	>	end
412	>	end
413	>	else
414	>	if (FODSMajorVersion = 11) and (FODSMinorVersion >= 1) then
415		begin
416		Stmt := Prepare(StartTransaction([isc_tpb_read,isc_tpb_nowait,isc_tpb_concurrency],taCommit),
417		'Select MON$CHARACTER_SET_ID, MON$REMOTE_PROTOCOL From MON$ATTACHMENTS '+
#	Line 252 | Line 420 | begin
420		if ResultSet.FetchNext then
421		begin
422		FCharSetID := ResultSet[0].AsInteger;
423	<	FRemoteProtocol := ResultSet[1].AsString;
423	>	FRemoteProtocol := Trim(ResultSet[1].AsString);
424		end
425		end
426		else
#	Line 261 | Line 429 | begin
429		Param :=  DPB.Find(isc_dpb_lc_ctype);
430		if (Param = nil) or not CharSetName2CharSetID(Param.AsString,FCharSetID) then
431		FCharSetID := 0;
432	<	FRemoteProtocol := '';
433	<	end
434	<	else
435	<	begin
436	<	FCharSetID := 0;
437	<	FRemoteProtocol := '';
432	>	case GetProtocol(FDatabaseName) of
433	>	TCP:       FRemoteProtocol := 'TCPv4';
434	>	Local:     FRemoteProtocol := '';
435	>	NamedPipe: FRemoteProtocol := 'Netbui';
436	>	SPX:       FRemoteProtocol := 'SPX'
437	>	end;
438		end;
439		FHasDefaultCharSet := CharSetID2CodePage(FCharSetID,FCodePage) and (FCharSetID > 1);
440		end;
441
442	<	constructor TFBAttachment.Create(DatabaseName: AnsiString; DPB: IDPB;
443	<	RaiseExceptionOnConnectError: boolean);
442	>	constructor TFBAttachment.Create(api: TFBClientAPI; DatabaseName: AnsiString;
443	>	DPB: IDPB; RaiseExceptionOnConnectError: boolean);
444		begin
445		inherited Create;
446	<	FFirebirdAPI := FirebirdAPI; {Keep reference to interface}
446	>	FFirebirdAPI := api.GetAPI; {Keep reference to interface}
447		FSQLDialect := 3;
448		FDatabaseName := DatabaseName;
449		FDPB := DPB;
#	Line 329 | Line 497 | begin
497		end;
498		end;
499
500	+	{$IFDEF HASREQEX}
501		procedure TFBAttachment.DPBFromCreateSQL(CreateSQL: AnsiString);
502		var RegexObj: TRegExpr;
503		begin
#	Line 357 | Line 526 | begin
526		DPB.Add(isc_dpb_lc_ctype).AsString := GetCharSetName(FCharSetID);
527		DPB.Add(isc_dpb_set_db_SQL_dialect).setAsByte(FSQLDialect);
528		end;
529	+	{$ELSE}
530	+	procedure TFBAttachment.DPBFromCreateSQL(CreateSQL: AnsiString);
531	+	begin
532	+	FDPB := FFirebirdAPI.AllocateDPB;
533	+	if FCharSetID > 0 then
534	+	DPB.Add(isc_dpb_lc_ctype).AsString := GetCharSetName(FCharSetID);
535	+	DPB.Add(isc_dpb_set_db_SQL_dialect).setAsByte(FSQLDialect);
536	+	end;
537	+	{$ENDIF}
538
539		procedure TFBAttachment.SetParameters(SQLParams: ISQLParams;
540		params: array of const);
#	Line 406 | Line 584 | begin
584		end;
585		end;
586
587	+	procedure TFBAttachment.UseServerICUChanged;
588	+	begin
589	+	// Do nothing by default
590	+	end;
591	+
592		destructor TFBAttachment.Destroy;
593		begin
594		Disconnect(true);
595		inherited Destroy;
596		end;
597
598	+	function TFBAttachment.getFirebirdAPI: IFirebirdAPI;
599	+	begin
600	+	Result := FFirebirdAPI;
601	+	end;
602	+
603		function TFBAttachment.getDPB: IDPB;
604		begin
605		Result := FDPB;
#	Line 419 | Line 607 | end;
607
608		function TFBAttachment.AllocateBPB: IBPB;
609		begin
610	<	Result := TBPB.Create;
610	>	Result := TBPB.Create(FFirebirdAPI as TFBClientAPI);
611	>	end;
612	>
613	>	function TFBAttachment.AllocateDIRB: IDIRB;
614	>	begin
615	>	Result := TDIRB.Create(FFirebirdAPI as TFBClientAPI);
616		end;
617
618		procedure TFBAttachment.ExecImmediate(TPB: array of byte; sql: AnsiString;
#	Line 542 | Line 735 | begin
735		end;
736
737		function TFBAttachment.PrepareWithNamedParameters(transaction: ITransaction;
738	<	sql: AnsiString; GenerateParamNames: boolean): IStatement;
738	>	sql: AnsiString; GenerateParamNames: boolean; CaseSensitiveParams: boolean): IStatement;
739		begin
740	<	Result := PrepareWithNamedParameters(transaction,sql,FSQLDialect,GenerateParamNames);
740	>	Result := PrepareWithNamedParameters(transaction,sql,FSQLDialect,GenerateParamNames,CaseSensitiveParams);
741		end;
742
743		function TFBAttachment.GetEventHandler(Event: AnsiString): IEvents;
#	Line 564 | Line 757 | begin
757		Result := FSQLDialect;
758		end;
759
760	+	function TFBAttachment.CreateBlob(transaction: ITransaction; RelationName,
761	+	ColumnName: AnsiString; BPB: IBPB): IBlob;
762	+	begin
763	+	Result := CreateBlob(transaction,GetBlobMetaData(Transaction,RelationName,ColumnName),BPB);
764	+	end;
765	+
766	+	function TFBAttachment.OpenBlob(transaction: ITransaction; RelationName,
767	+	ColumnName: AnsiString; BlobID: TISC_QUAD; BPB: IBPB): IBlob;
768	+	begin
769	+	Result := OpenBlob(Transaction,
770	+	GetBlobMetaData(Transaction,RelationName,ColumnName),
771	+	BlobID,BPB);
772	+	end;
773	+
774		function TFBAttachment.OpenBlob(transaction: ITransaction; Field: ISQLData;
775		BPB: IBPB): IBlob;
776		begin
777		Result := OpenBlob(Transaction,Field.GetBlobMetadata, Field.AsQuad,BPB);
778		end;
779
780	+	function TFBAttachment.CreateArray(transaction: ITransaction; RelationName,
781	+	ColumnName: AnsiString): IArray;
782	+	begin
783	+	Result := CreateArray(transaction,GetArrayMetaData(transaction,RelationName,ColumnName));
784	+	end;
785	+
786	+	function TFBAttachment.OpenArray(transaction: ITransaction; RelationName,
787	+	ColumnName: AnsiString; ArrayID: TISC_QUAD): IArray;
788	+	begin
789	+	Result := OpenArray(transaction,
790	+	GetArrayMetaData(transaction,RelationName,ColumnName),ArrayID);
791	+	end;
792	+
793	+	function TFBAttachment.GetDBInformation(Requests: array of byte
794	+	): IDBInformation;
795	+	var ReqBuffer: PByte;
796	+	i: integer;
797	+	begin
798	+	CheckHandle;
799	+	if Length(Requests) = 1 then
800	+	Result := GetDBInformation(Requests[0])
801	+	else
802	+	begin
803	+	GetMem(ReqBuffer,Length(Requests));
804	+	try
805	+	for i := 0 to Length(Requests) - 1 do
806	+	ReqBuffer[i] := Requests[i];
807	+
808	+	Result := GetDBInfo(ReqBuffer,Length(Requests));
809	+
810	+	finally
811	+	FreeMem(ReqBuffer);
812	+	end;
813	+	end;
814	+	end;
815	+
816	+	function TFBAttachment.GetDBInformation(Request: byte): IDBInformation;
817	+	begin
818	+	CheckHandle;
819	+	Result := GetDBInfo(@Request,1);
820	+	end;
821	+
822	+	function TFBAttachment.GetDBInformation(Requests: IDIRB): IDBInformation;
823	+	begin
824	+	CheckHandle;
825	+	with Requests as TDIRB do
826	+	Result := GetDBInfo(getBuffer,getDataLength);
827	+	end;
828	+
829		function TFBAttachment.GetConnectString: AnsiString;
830		begin
831		Result := FDatabaseName;
#	Line 580 | Line 836 | begin
836		Result := FRemoteProtocol;
837		end;
838
839	+	function TFBAttachment.GetAuthenticationMethod: AnsiString;
840	+	begin
841	+	Result := FAuthMethod;
842	+	end;
843	+
844	+	function TFBAttachment.GetSecurityDatabase: AnsiString;
845	+	begin
846	+	Result := FSecDatabase;
847	+	end;
848	+
849		function TFBAttachment.GetODSMajorVersion: integer;
850		begin
851		Result := FODSMajorVersion;
#	Line 590 | Line 856 | begin
856		Result := FODSMinorVersion;
857		end;
858
859	+	function TFBAttachment.HasDecFloatSupport: boolean;
860	+	begin
861	+	Result := false;
862	+	end;
863	+
864		function TFBAttachment.HasDefaultCharSet: boolean;
865		begin
866		Result := FHasDefaultCharSet
#	Line 669 | Line 940 | var i: integer;
940		begin
941		Result := false;
942		for i := Low(CharSetMap) to High(CharSetMap) do
943	<	if AnsiCompareStr(CharSetMap[i].CharSetName, CharSetName) = 0 then
943	>	if AnsiCompareText(CharSetMap[i].CharSetName, CharSetName) = 0 then
944		begin
945		CharSetID := CharSetMap[i].CharSetID;
946		Result := true;
#	Line 677 | Line 948 | begin
948		end;
949
950		for i := 0 to Length(FUserCharSetMap) - 1 do
951	<	if AnsiCompareStr(FUserCharSetMap[i].CharSetName, CharSetName) = 0 then
951	>	if AnsiCompareText(FUserCharSetMap[i].CharSetName, CharSetName) = 0 then
952		begin
953		CharSetID := FUserCharSetMap[i].CharSetID;
954		Result := true;
#	Line 734 | Line 1005 | begin
1005		CharSetID := CharSets[0].AsInteger;
1006		end;
1007
1008	+	function TFBAttachment.GetTimeZoneServices: ITimeZoneServices;
1009	+	begin
1010	+	IBError(ibxeNotSupported,[]);
1011	+	end;
1012	+
1013	+	function TFBAttachment.HasTimeZoneSupport: boolean;
1014	+	begin
1015	+	Result := false;
1016	+	end;
1017	+
1018	+	{ TDPBItem }
1019	+
1020	+	function TDPBItem.getParamTypeName: AnsiString;
1021	+	begin
1022	+	Result := DPBPrefix + DPBConstantNames[getParamType];
1023	+	end;
1024	+
1025	+	{ TDPB }
1026	+
1027	+	constructor TDPB.Create(api: TFBClientAPI);
1028	+	begin
1029	+	inherited Create(api);
1030	+	FDataLength := 1;
1031	+	FBuffer^ := isc_dpb_version1;
1032	+	end;
1033	+
1034	+	function TDPB.GetDPBParamTypeName(ParamType: byte): Ansistring;
1035	+	begin
1036	+	if ParamType <= isc_dpb_last_dpb_constant then
1037	+	Result := DPBConstantNames[ParamType]
1038	+	else
1039	+	Result := '';
1040	+	end;
1041	+
1042	+	function TDPB.LookupItemType(ParamTypeName: AnsiString): byte;
1043	+	var i: byte;
1044	+	begin
1045	+	Result := 0;
1046	+	ParamTypeName := LowerCase(ParamTypeName);
1047	+	if (Pos(DPBPrefix, ParamTypeName) = 1) then
1048	+	Delete(ParamTypeName, 1, Length(DPBPrefix));
1049	+
1050	+	for i := 1 to isc_dpb_last_dpb_constant do
1051	+	if (ParamTypeName = DPBConstantNames[i]) then
1052	+	begin
1053	+	Result := i;
1054	+	break;
1055	+	end;
1056	+	end;
1057	+
1058		end.
1059

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