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root/public/ibx/branches/udr/client/IBUtils.pas

Comparing ibx/trunk/fbintf/IBUtils.pas (file contents):
Revision 45 by tony, Tue Dec 6 10:33:46 2016 UTC vs.
Revision 209 by tony, Wed Mar 14 12:48:51 2018 UTC

#	Line 32 | Line 32
32		{************************************************************************}
33
34		unit IBUtils;
35	+	{$IFDEF MSWINDOWS}
36	+	{$DEFINE WINDOWS}
37	+	{$ENDIF}
38
39		{$IFDEF FPC}
40		{$Mode Delphi}
41		{$codepage UTF8}
42	+	{$define HASREQEX}
43		{$ENDIF}
44
45	+
46		interface
47
48	<	uses
44	<	{$IFDEF WINDOWS }
45	<	Windows,
46	<	{$ELSE}
47	<	unix,
48	<	{$ENDIF}
49	<	Classes, SysUtils;
48	>	uses Classes, SysUtils, IB;
49
50		const
51		CRLF = #13 + #10;
#	Line 55 | Line 54 | const
54		TAB  = #9;
55		NULL_TERMINATOR = #0;
56
57	<	sqlReservedWords: array [0..166] of string = (
58	<	'ADD','ADMIN','ALL','ALTER','AND','ANY','AS','AT','AVG','BEGIN','BETWEEN','BIGINT','BIT_LENGTH','BLOB','BOTH',
59	<	'BY','CASE','CAST','CHAR','CHAR_LENGTH','CHARACTER','CHARACTER_LENGTH','CHECK','CLOSE','COLLATE','COLUMN',
60	<	'COMMIT','CONNECT','CONSTRAINT','COUNT','CREATE','CROSS','CURRENT','CURRENT_CONNECTION','CURRENT_DATE',
61	<	'CURRENT_ROLE','CURRENT_TIME','CURRENT_TIMESTAMP','CURRENT_TRANSACTION','CURRENT_USER','CURSOR','DATE',
62	<	'DAY','DEC','DECIMAL','DECLARE','DEFAULT','DELETE','DISCONNECT','DISTINCT','DOUBLE','DROP','ELSE','END',
63	<	'ESCAPE','EXECUTE','EXISTS','EXTERNAL','EXTRACT','FETCH','FILTER','FLOAT','FOR','FOREIGN','FROM','FULL',
64	<	'FUNCTION','GDSCODE','GLOBAL','GRANT','GROUP','HAVING','HOUR','IN','INDEX','INNER','INSENSITIVE','INSERT',
65	<	'INT','INTEGER','INTO','IS','JOIN','LEADING','LEFT','LIKE','LONG','LOWER','MAX','MAXIMUM_SEGMENT','MERGE',
66	<	'MIN','MINUTE','MONTH','NATIONAL','NATURAL','NCHAR','NO','NOT','NULL','NUMERIC','OCTET_LENGTH','OF','ON',
67	<	'ONLY','OPEN','OR','ORDER','OUTER','PARAMETER','PLAN','POSITION','POST_EVENT','PRECISION','PRIMARY',
68	<	'PROCEDURE','RDB$DB_KEY','REAL','RECORD_VERSION','RECREATE','RECURSIVE','REFERENCES','RELEASE','RETURNING_VALUES',
69	<	'RETURNS','REVOKE','RIGHT','ROLLBACK','ROW_COUNT','ROWS','SAVEPOINT','SECOND','SELECT','SENSITIVE',
70	<	'SET','SIMILAR','SMALLINT','SOME','SQLCODE','SQLSTATE','START','SUM','TABLE','THEN','TIME',
71	<	'TIMESTAMP','TO','TRAILING','TRIGGER','TRIM','UNION','UNIQUE','UPDATE','UPPER','USER','USING',
72	<	'VALUE','VALUES','VARCHAR','VARIABLE','VARYING','VIEW','WHEN','WHERE','WHILE','WITH','YEAR');
57	>	sqlReservedWords: array [0..198] of string = (
58	>	'ADD',
59	>	'ADMIN',
60	>	'ALL',
61	>	'ALTER',
62	>	'AND',
63	>	'ANY',
64	>	'AS',
65	>	'AT',
66	>	'AVG',
67	>	'BEGIN',
68	>	'BETWEEN',
69	>	'BIGINT',
70	>	'BIT_LENGTH',
71	>	'BLOB',
72	>	'BOOLEAN',
73	>	'BOTH',
74	>	'BY',
75	>	'CASE',
76	>	'CAST',
77	>	'CHAR',
78	>	'CHAR_LENGTH',
79	>	'CHARACTER',
80	>	'CHARACTER_LENGTH',
81	>	'CHECK',
82	>	'CLOSE',
83	>	'COLLATE',
84	>	'COLUMN',
85	>	'COMMIT',
86	>	'CONNECT',
87	>	'CONSTRAINT',
88	>	'CORR',
89	>	'COUNT',
90	>	'COVAR_POP',
91	>	'COVAR_SAMP',
92	>	'CREATE',
93	>	'CROSS',
94	>	'CURRENT',
95	>	'CURRENT_CONNECTION',
96	>	'CURRENT_DATE',
97	>	'CURRENT_ROLE',
98	>	'CURRENT_TIME',
99	>	'CURRENT_TIMESTAMP',
100	>	'CURRENT_TRANSACTION',
101	>	'CURRENT_USER',
102	>	'CURSOR',
103	>	'DATE',
104	>	'DAY',
105	>	'DEC',
106	>	'DECIMAL',
107	>	'DECLARE',
108	>	'DEFAULT',
109	>	'DELETE',
110	>	'DELETING',
111	>	'DETERMINISTIC',
112	>	'DISCONNECT',
113	>	'DISTINCT',
114	>	'DOUBLE',
115	>	'DROP',
116	>	'ELSE',
117	>	'END',
118	>	'ESCAPE',
119	>	'EXECUTE',
120	>	'EXISTS',
121	>	'EXTERNAL',
122	>	'EXTRACT',
123	>	'FALSE',
124	>	'FETCH',
125	>	'FILTER',
126	>	'FLOAT',
127	>	'FOR',
128	>	'FOREIGN',
129	>	'FROM',
130	>	'FULL',
131	>	'FUNCTION',
132	>	'GDSCODE',
133	>	'GLOBAL',
134	>	'GRANT',
135	>	'GROUP',
136	>	'HAVING',
137	>	'HOUR',
138	>	'IN',
139	>	'INDEX',
140	>	'INNER',
141	>	'INSENSITIVE',
142	>	'INSERT',
143	>	'INSERTING',
144	>	'INT',
145	>	'INTEGER',
146	>	'INTO',
147	>	'IS',
148	>	'JOIN',
149	>	'KEY',
150	>	'LEADING',
151	>	'LEFT',
152	>	'LIKE',
153	>	'LONG',
154	>	'LOWER',
155	>	'MAX',
156	>	'MAXIMUM_SEGMENT',
157	>	'MERGE',
158	>	'MIN',
159	>	'MINUTE',
160	>	'MONTH',
161	>	'NATIONAL',
162	>	'NATURAL',
163	>	'NCHAR',
164	>	'NO',
165	>	'NOT',
166	>	'NULL',
167	>	'NUMERIC',
168	>	'OCTET_LENGTH',
169	>	'OF',
170	>	'OFFSET',
171	>	'ON',
172	>	'ONLY',
173	>	'OPEN',
174	>	'OR',
175	>	'ORDER',
176	>	'OUTER',
177	>	'OVER',
178	>	'PARAMETER',
179	>	'PLAN',
180	>	'POSITION',
181	>	'POST_EVENT',
182	>	'PRECISION',
183	>	'PRIMARY',
184	>	'PROCEDURE',
185	>	'RDB$DB_KEY',
186	>	'RDB$RECORD_VERSION',
187	>	'REAL',
188	>	'RECORD_VERSION',
189	>	'RECREATE',
190	>	'RECURSIVE',
191	>	'REFERENCES',
192	>	'REGR_AVGX',
193	>	'REGR_AVGY',
194	>	'REGR_COUNT',
195	>	'REGR_INTERCEPT',
196	>	'REGR_R2',
197	>	'REGR_SLOPE',
198	>	'REGR_SXX',
199	>	'REGR_SXY',
200	>	'REGR_SYY',
201	>	'RELEASE',
202	>	'RETURN',
203	>	'RETURNING_VALUES',
204	>	'RETURNS',
205	>	'REVOKE',
206	>	'RIGHT',
207	>	'ROLLBACK',
208	>	'ROW',
209	>	'ROW_COUNT',
210	>	'ROWS',
211	>	'SAVEPOINT',
212	>	'SCROLL',
213	>	'SECOND',
214	>	'SELECT',
215	>	'SENSITIVE',
216	>	'SET',
217	>	'SIMILAR',
218	>	'SMALLINT',
219	>	'SOME',
220	>	'SQLCODE',
221	>	'SQLSTATE',
222	>	'SQLSTATE',
223	>	'START',
224	>	'STDDEV_POP',
225	>	'STDDEV_SAMP',
226	>	'SUM',
227	>	'TABLE',
228	>	'THEN',
229	>	'TIME',
230	>	'TIMESTAMP',
231	>	'TO',
232	>	'TRAILING',
233	>	'TRIGGER',
234	>	'TRIM',
235	>	'TRUE',
236	>	'UNION',
237	>	'UNIQUE',
238	>	'UNKNOWN',
239	>	'UPDATE',
240	>	'UPDATING',
241	>	'UPPER',
242	>	'USER',
243	>	'USING',
244	>	'VALUE',
245	>	'VALUES',
246	>	'VAR_POP',
247	>	'VAR_SAMP',
248	>	'VARCHAR',
249	>	'VARIABLE',
250	>	'VARYING',
251	>	'VIEW',
252	>	'WHEN',
253	>	'WHERE',
254	>	'WHILE',
255	>	'WITH',
256	>	'YEAR'
257	>	);
258
259		function Max(n1, n2: Integer): Integer;
260		function Min(n1, n2: Integer): Integer;
261	<	function RandomString(iLength: Integer): String;
261	>	function RandomString(iLength: Integer): AnsiString;
262		function RandomInteger(iLow, iHigh: Integer): Integer;
263	<	function StripString(st: String; CharsToStrip: String): String;
264	<	function FormatIdentifier(Dialect: Integer; Value: String): String;
265	<	function FormatIdentifierValue(Dialect: Integer; Value: String): String;
266	<	function FormatIdentifierValueNC(Dialect: Integer; Value: String): String;
267	<	function ExtractIdentifier(Dialect: Integer; Value: String): String;
268	<	function QuoteIdentifier(Dialect: Integer; Value: String): String;
269	<	function QuoteIdentifierIfNeeded(Dialect: Integer; Value: String): String;
270	<	function Space2Underscore(s: string): string;
263	>	function StripString(st: AnsiString; CharsToStrip: AnsiString): AnsiString;
264	>	function ExtractIdentifier(Dialect: Integer; Value: AnsiString): AnsiString;
265	>	function QuoteIdentifier(Dialect: Integer; Value: AnsiString): AnsiString;
266	>	function QuoteIdentifierIfNeeded(Dialect: Integer; Value: AnsiString): AnsiString;
267	>	function Space2Underscore(s: AnsiString): AnsiString;
268	>	function SQLSafeString(const s: AnsiString): AnsiString;
269	>	function IsSQLIdentifier(Value: AnsiString): boolean;
270	>	function ExtractConnectString(const CreateSQL: AnsiString; var ConnectString: AnsiString): boolean;
271	>	function MakeConnectString(ServerName, DatabaseName: AnsiString; Protocol: TProtocol;
272	>	PortNo: AnsiString = ''): AnsiString;
273	>	function ParseConnectString(ConnectString: AnsiString;
274	>	var ServerName, DatabaseName: AnsiString; var Protocol: TProtocolAll;
275	>	var PortNo: AnsiString): boolean;
276	>	function GetProtocol(ConnectString: AnsiString): TProtocolAll;
277
278		implementation
279
280	+	{$IFDEF HASREQEX}
281	+	uses RegExpr;
282	+	{$ENDIF}
283	+
284		function Max(n1, n2: Integer): Integer;
285		begin
286		if (n1 > n2) then
#	Line 103 | Line 297 | begin
297		result := n2;
298		end;
299
300	<	function RandomString(iLength: Integer): String;
300	>	function RandomString(iLength: Integer): AnsiString;
301		begin
302		result := '';
303		while Length(result) < iLength do
#	Line 117 | Line 311 | begin
311		result := Trunc(Random(iHigh - iLow)) + iLow;
312		end;
313
314	<	function StripString(st: String; CharsToStrip: String): String;
314	>	function StripString(st: AnsiString; CharsToStrip: AnsiString): AnsiString;
315		var
316		i: Integer;
317		begin
#	Line 128 | Line 322 | begin
322		end;
323		end;
324
325	<	function FormatIdentifier(Dialect: Integer; Value: String): String;
132	<	begin
133	<	Value := Trim(Value);
134	<	if Dialect = 1 then
135	<	Value := AnsiUpperCase(Value)
136	<	else
137	<	if (Value <> '') and (Value[1] = '"') then
138	<	Value := '"' + StringReplace (TrimRight(Value), '"', '""', [rfReplaceAll]) + '"'
139	<	else
140	<	Value := AnsiUpperCase(Value);
141	<	Result := Value;
142	<	end;
325	>	{Extracts SQL Identifier typically from a  Dialect 3 encoding}
326
327	<	function FormatIdentifierValue(Dialect: Integer; Value: String): String;
327	>	function ExtractIdentifier(Dialect: Integer; Value: AnsiString): AnsiString;
328		begin
329		Value := Trim(Value);
330		if Dialect = 1 then
#	Line 160 | Line 343 | begin
343		Result := Value;
344		end;
345
346	<	function FormatIdentifierValueNC(Dialect: Integer; Value: String): String;
346	>	{Returns true if "w" is a Firebird SQL reserved word}
347	>
348	>	function IsReservedWord(w: AnsiString): boolean;
349	>	var i: integer;
350	>	begin
351	>	Result := true;
352	>	for i := 0 to Length(sqlReservedWords) - 1 do
353	>	if w = sqlReservedWords[i] then
354	>	Exit;
355	>	Result := false;
356	>	end;
357	>
358	>	{Format an SQL Identifier according to SQL Dialect}
359	>
360	>	function QuoteIdentifier(Dialect: Integer; Value: AnsiString): AnsiString;
361		begin
165	–	Value := Trim(Value);
362		if Dialect = 1 then
363	<	Value := AnsiUpperCase(Value)
363	>	Value := AnsiUpperCase(Trim(Value))
364		else
365	<	begin
366	<	if (Value <> '') and (Value[1] = '"') then
365	>	Value := '"' + StringReplace (Value, '""', '"', [rfReplaceAll]) + '"';
366	>	Result := Value;
367	>	end;
368	>
369	>	const
370	>	ValidSQLIdentifierChars = ['A'..'Z','a'..'z','0'..'9','_','$'];
371	>
372	>	{Returns true if the value is a valid SQL Identifier - note lower case accepted}
373	>
374	>	function IsSQLIdentifier(Value: AnsiString): boolean;
375	>	var i: integer;
376	>	begin
377	>	Result := false;
378	>	for i := 1 to Length(Value) do
379	>	if not (Value[i] in ValidSQLIdentifierChars) then Exit;
380	>	Result := true;
381	>	end;
382	>
383	>	{Extracts the Database Connect string from a Create Database Statement}
384	>
385	>	{$IFDEF HASREQEX}
386	>	function ExtractConnectString(const CreateSQL: AnsiString;
387	>	var ConnectString: AnsiString): boolean;
388	>	var RegexObj: TRegExpr;
389	>	begin
390	>	RegexObj := TRegExpr.Create;
391	>	try
392	>	{extact database file spec}
393	>	RegexObj.ModifierG := false; {turn off greedy matches}
394	>	RegexObj.ModifierI := true; {case insensitive match}
395	>	RegexObj.Expression := '^ *CREATE +(DATABASE|SCHEMA) +''(.*)''';
396	>	Result := RegexObj.Exec(CreateSQL);
397	>	if Result then
398	>	ConnectString := RegexObj.Match[2];
399	>	finally
400	>	RegexObj.Free;
401	>	end;
402	>	end;
403	>
404	>	function ParseConnectString(ConnectString: AnsiString; var ServerName,
405	>	DatabaseName: AnsiString; var Protocol: TProtocolAll; var PortNo: AnsiString
406	>	): boolean;
407	>	var RegexObj: TRegExpr;
408	>	scheme: AnsiString;
409	>	begin
410	>	ServerName := '';
411	>	DatabaseName := ConnectString;
412	>	PortNo := '';
413	>	Protocol := unknownProtocol;
414	>	RegexObj := TRegExpr.Create;
415	>	try
416	>	{extact database file spec}
417	>	RegexObj.ModifierG := false; {turn off greedy matches}
418	>	RegexObj.Expression := '^([a-zA-Z]+)://([a-zA-Z0-9\-\.]+)(|:[0-9a-zA-Z\-]+)/(.*)$';
419	>	Result := RegexObj.Exec(ConnectString);
420	>	if Result then
421		begin
422	<	Delete(Value, 1, 1);
423	<	Delete(Value, Length(Value), 1);
424	<	Value := AnsiUpperCase(StringReplace (Value, '""', '"', [rfReplaceAll]));
422	>	{URL type connect string}
423	>	scheme := AnsiUpperCase(RegexObj.Match[1]);
424	>	ServerName := RegexObj.Match[2];
425	>	if RegexObj.MatchLen[3] > 0 then
426	>	PortNo := system.Copy(ConnectString,RegexObj.MatchPos[3]+1,RegexObj.MatchLen[3]-1);
427	>	DatabaseName := RegexObj.Match[4];
428	>	if scheme = 'INET' then
429	>	Protocol := inet
430	>	else
431	>	if scheme = 'XNET' then
432	>	Protocol := xnet
433	>	else
434	>	if scheme = 'WNET' then
435	>	Protocol := wnet
436		end
437		else
438	<	Value := AnsiUpperCase(Value);
438	>	begin
439	>	RegexObj.Expression := '^([a-zA-Z]:\\.*)';
440	>	Result := RegexObj.Exec(ConnectString);
441	>	if Result then
442	>	Protocol := Local {Windows with leading drive ID}
443	>	else
444	>	begin
445	>	RegexObj.Expression := '^([a-zA-Z0-9\-\.]+)(|/[0-9a-zA-Z\-]+):(.*)$';
446	>	Result := RegexObj.Exec(ConnectString);
447	>	if Result then
448	>	begin
449	>	{Legacy TCP Format}
450	>	ServerName := RegexObj.Match[1];
451	>	if RegexObj.MatchLen[2] > 0 then
452	>	PortNo := system.Copy(ConnectString,RegexObj.MatchPos[2]+1,RegexObj.MatchLen[2]-1);
453	>	DatabaseName := RegexObj.Match[3];
454	>	Protocol := TCP;
455	>	end
456	>	else
457	>	begin
458	>	RegexObj.Expression := '^\\\\([a-zA-Z0-9\-\.]+)(|@[0-9a-zA-Z\-]+)\\(.*)$';
459	>	Result := RegexObj.Exec(ConnectString);
460	>	if Result then
461	>	begin
462	>	{Netbui}
463	>	ServerName := RegexObj.Match[1];
464	>	if RegexObj.MatchLen[2] > 0 then
465	>	PortNo := system.Copy(ConnectString,RegexObj.MatchPos[2]+1,RegexObj.MatchLen[2]-1);
466	>	DatabaseName := RegexObj.Match[3];
467	>	Protocol := NamedPipe
468	>	end
469	>	else
470	>	begin
471	>	Result := true;
472	>	Protocol := Local; {Assume local}
473	>	end;
474	>	end;
475	>	end;
476	>	end;
477	>	finally
478	>	RegexObj.Free;
479		end;
179	–	Result := Value;
480		end;
481
482	<	function ExtractIdentifier(Dialect: Integer; Value: String): String;
482	>	function GetProtocol(ConnectString: AnsiString): TProtocolAll;
483	>	var ServerName,
484	>	DatabaseName: AnsiString;
485	>	PortNo: AnsiString;
486		begin
487	<	Value := Trim(Value);
488	<	if Dialect = 1 then
489	<	Value := AnsiUpperCase(Value)
490	<	else
487	>	ParseConnectString(ConnectString,ServerName,DatabaseName,Result,PortNo);
488	>	end;
489	>
490	>	{$ELSE}
491	>	{cruder version of above for Delphi. Older versions lack regular expression
492	>	handling.}
493	>	function ExtractConnectString(const CreateSQL: AnsiString;
494	>	var ConnectString: AnsiString): boolean;
495	>	var i: integer;
496	>	begin
497	>	Result := false;
498	>	i := Pos('''',CreateSQL);
499	>	if i > 0 then
500		begin
501	<	if (Value <> '') and (Value[1] = '"') then
501	>	ConnectString := CreateSQL;
502	>	delete(ConnectString,1,i);
503	>	i := Pos('''',ConnectString);
504	>	if i > 0 then
505		begin
506	<	Delete(Value, 1, 1);
507	<	Delete(Value, Length(Value), 1);
508	<	Value := StringReplace (Value, '""', '"', [rfReplaceAll]);
194	<	end
195	<	else
196	<	Value := AnsiUpperCase(Value);
506	>	delete(ConnectString,i,Length(ConnectString)-i+1);
507	>	Result := true;
508	>	end;
509		end;
198	–	Result := Value;
510		end;
511
512	<	function IsReservedWord(w: string): boolean;
202	<	var i: integer;
512	>	function GetProtocol(ConnectString: AnsiString): TProtocolAll;
513		begin
514	<	Result := true;
205	<	for i := 0 to Length(sqlReservedWords) - 1 do
206	<	if w = sqlReservedWords[i] then
207	<	Exit;
208	<	Result := false;
514	>	Result := unknownProtocol; {not implemented for Delphi}
515		end;
516
517	<	function QuoteIdentifier(Dialect: Integer; Value: String): String;
517	>	function ParseConnectString(ConnectString: AnsiString;
518	>	var ServerName, DatabaseName: AnsiString; var Protocol: TProtocolAll;
519	>	var PortNo: AnsiString): boolean;
520		begin
521	<	if Dialect = 1 then
214	<	Value := AnsiUpperCase(Trim(Value))
215	<	else
216	<	Value := '"' + Value + '"';
217	<	Result := Value;
521	>	Result := false;
522		end;
523
524	<	function QuoteIdentifierIfNeeded(Dialect: Integer; Value: String): String;
524	>	{$ENDIF}
525	>
526	>	{Make a connect string in format appropriate protocol}
527	>
528	>	function MakeConnectString(ServerName, DatabaseName: AnsiString;
529	>	Protocol: TProtocol; PortNo: AnsiString): AnsiString;
530	>	begin
531	>	if PortNo <> '' then
532	>	case Protocol of
533	>	NamedPipe:
534	>	ServerName := ServerName + '@' + PortNo;
535	>	Local,
536	>	SPX,
537	>	xnet: {do nothing};
538	>	TCP:
539	>	ServerName := ServerName + '/' + PortNo;
540	>	else
541	>	ServerName := ServerName + ':' + PortNo;
542	>	end;
543	>
544	>	case Protocol of
545	>	TCP:        Result := ServerName + ':' + DatabaseName; {do not localize}
546	>	SPX:        Result := ServerName + '@' + DatabaseName; {do not localize}
547	>	NamedPipe:  Result := '\\' + ServerName + '\' + DatabaseName; {do not localize}
548	>	Local:      Result := DatabaseName; {do not localize}
549	>	inet:       Result := 'inet://' + ServerName + '/'+ DatabaseName; {do not localize}
550	>	wnet:       Result := 'wnet://' + ServerName + '/'+ DatabaseName; {do not localize}
551	>	xnet:       Result := 'xnet://' + ServerName + '/'+ DatabaseName;  {do not localize}
552	>	end;
553	>	end;
554	>
555	>	{Format an SQL Identifier according to SQL Dialect with encapsulation if necessary}
556	>
557	>	function QuoteIdentifierIfNeeded(Dialect: Integer; Value: AnsiString): AnsiString;
558		begin
559		if (Dialect = 3) and
560	<	((AnsiUpperCase(Value) <> Value) or IsReservedWord(Value)) then
561	<	Result := '"' + Value + '"'
560	>	(IsReservedWord(Value) or not IsSQLIdentifier(Value) or (AnsiUpperCase(Value) <> Value)) then
561	>	Result := '"' + StringReplace (TrimRight(Value), '"', '""', [rfReplaceAll]) + '"'
562		else
563		Result := Value
564		end;
565
566	<	function Space2Underscore(s: string): string;
566	>	{Replaces unknown characters in a string with underscores}
567	>
568	>	function Space2Underscore(s: AnsiString): AnsiString;
569		var
570		k: integer;
571		begin
572		Result := s;
573		for k := 1 to Length(s) do
574	<	if not (Result[k] in ['0'..'9','A'..'Z','_','$'])  then
574	>	if not (Result[k] in ValidSQLIdentifierChars)  then
575		Result[k] := '_';
576		end;
577
578	+	{Reformats an SQL string with single quotes duplicated.}
579	+
580	+	function SQLSafeString(const s: AnsiString): AnsiString;
581	+	begin
582	+	Result := StringReplace(s,'''','''''',[rfReplaceAll]);
583	+	end;
584
585		end.

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