47 |
|
|
48 |
|
uses Classes, SysUtils, IB; |
49 |
|
|
50 |
+ |
type |
51 |
+ |
TSQLTokens = ( |
52 |
+ |
|
53 |
+ |
{Reserved Words} |
54 |
+ |
|
55 |
+ |
sqltAdd, |
56 |
+ |
sqltAdmin, |
57 |
+ |
sqltAll, |
58 |
+ |
sqltAlter, |
59 |
+ |
sqltAnd, |
60 |
+ |
sqltAny, |
61 |
+ |
sqltAs, |
62 |
+ |
sqltAt, |
63 |
+ |
sqltAvg, |
64 |
+ |
sqltBegin, |
65 |
+ |
sqltBetween, |
66 |
+ |
sqltBigint, |
67 |
+ |
sqltBit_Length, |
68 |
+ |
sqltBlob, |
69 |
+ |
sqltBoolean, |
70 |
+ |
sqltBoth, |
71 |
+ |
sqltBy, |
72 |
+ |
sqltCase, |
73 |
+ |
sqltCast, |
74 |
+ |
sqltChar, |
75 |
+ |
sqltChar_Length, |
76 |
+ |
sqltCharacter, |
77 |
+ |
sqltCharacter_Length, |
78 |
+ |
sqltCheck, |
79 |
+ |
sqltClose, |
80 |
+ |
sqltCollate, |
81 |
+ |
sqltColumn, |
82 |
+ |
sqltCommit, |
83 |
+ |
sqltConnect, |
84 |
+ |
sqltConstraint, |
85 |
+ |
sqltCorr, |
86 |
+ |
sqltCount, |
87 |
+ |
sqltCovar_Pop, |
88 |
+ |
sqltCovar_Samp, |
89 |
+ |
sqltCreate, |
90 |
+ |
sqltCross, |
91 |
+ |
sqltCurrent, |
92 |
+ |
sqltCurrent_Connection, |
93 |
+ |
sqltCurrent_Date, |
94 |
+ |
sqltCurrent_Role, |
95 |
+ |
sqltCurrent_Time, |
96 |
+ |
sqltCurrent_Timestamp, |
97 |
+ |
sqltCurrent_Transaction, |
98 |
+ |
sqltCurrent_User, |
99 |
+ |
sqltCursor, |
100 |
+ |
sqltDate, |
101 |
+ |
sqltDay, |
102 |
+ |
sqltDec, |
103 |
+ |
sqltDecimal, |
104 |
+ |
sqltDeclare, |
105 |
+ |
sqltDefault, |
106 |
+ |
sqltDelete, |
107 |
+ |
sqltDeleting, |
108 |
+ |
sqltDeterministic, |
109 |
+ |
sqltDisconnect, |
110 |
+ |
sqltDistinct, |
111 |
+ |
sqltDouble, |
112 |
+ |
sqltDrop, |
113 |
+ |
sqltElse, |
114 |
+ |
sqltEnd, |
115 |
+ |
sqltEscape, |
116 |
+ |
sqltExecute, |
117 |
+ |
sqltExists, |
118 |
+ |
sqltExternal, |
119 |
+ |
sqltExtract, |
120 |
+ |
sqltFalse, |
121 |
+ |
sqltFetch, |
122 |
+ |
sqltFilter, |
123 |
+ |
sqltFloat, |
124 |
+ |
sqltFor, |
125 |
+ |
sqltForeign, |
126 |
+ |
sqltFrom, |
127 |
+ |
sqltFull, |
128 |
+ |
sqltFunction, |
129 |
+ |
sqltGdscode, |
130 |
+ |
sqltGlobal, |
131 |
+ |
sqltGrant, |
132 |
+ |
sqltGroup, |
133 |
+ |
sqltHaving, |
134 |
+ |
sqltHour, |
135 |
+ |
sqltIn, |
136 |
+ |
sqltIndex, |
137 |
+ |
sqltInner, |
138 |
+ |
sqltInsensitive, |
139 |
+ |
sqltInsert, |
140 |
+ |
sqltInserting, |
141 |
+ |
sqltInt, |
142 |
+ |
sqltInteger, |
143 |
+ |
sqltInto, |
144 |
+ |
sqltIs, |
145 |
+ |
sqltJoin, |
146 |
+ |
sqltKey, |
147 |
+ |
sqltLeading, |
148 |
+ |
sqltLeft, |
149 |
+ |
sqltLike, |
150 |
+ |
sqltLong, |
151 |
+ |
sqltLower, |
152 |
+ |
sqltMax, |
153 |
+ |
sqltMaximum_Segment, |
154 |
+ |
sqltMerge, |
155 |
+ |
sqltMin, |
156 |
+ |
sqltMinute, |
157 |
+ |
sqltMonth, |
158 |
+ |
sqltNational, |
159 |
+ |
sqltNatural, |
160 |
+ |
sqltNchar, |
161 |
+ |
sqltNo, |
162 |
+ |
sqltNot, |
163 |
+ |
sqltNull, |
164 |
+ |
sqltNumeric, |
165 |
+ |
sqltOctet_Length, |
166 |
+ |
sqltOf, |
167 |
+ |
sqltOffset, |
168 |
+ |
sqltOn, |
169 |
+ |
sqltOnly, |
170 |
+ |
sqltOpen, |
171 |
+ |
sqltOr, |
172 |
+ |
sqltOrder, |
173 |
+ |
sqltOuter, |
174 |
+ |
sqltOver, |
175 |
+ |
sqltParameter, |
176 |
+ |
sqltPlan, |
177 |
+ |
sqltPosition, |
178 |
+ |
sqltPost_Event, |
179 |
+ |
sqltPrecision, |
180 |
+ |
sqltPrimary, |
181 |
+ |
sqltProcedure, |
182 |
+ |
sqltRdbDb_Key, |
183 |
+ |
sqltRdbRecord_Version, |
184 |
+ |
sqltReal, |
185 |
+ |
sqltRecord_Version, |
186 |
+ |
sqltRecreate, |
187 |
+ |
sqltRecursive, |
188 |
+ |
sqltReferences, |
189 |
+ |
sqltRegr_Avgx, |
190 |
+ |
sqltRegr_Avgy, |
191 |
+ |
sqltRegr_Count, |
192 |
+ |
sqltRegr_Intercept, |
193 |
+ |
sqltRegr_R2, |
194 |
+ |
sqltRegr_Slope, |
195 |
+ |
sqltRegr_Sxx, |
196 |
+ |
sqltRegr_Sxy, |
197 |
+ |
sqltRegr_Syy, |
198 |
+ |
sqltRelease, |
199 |
+ |
sqltReturn, |
200 |
+ |
sqltReturning_Values, |
201 |
+ |
sqltReturns, |
202 |
+ |
sqltRevoke, |
203 |
+ |
sqltRight, |
204 |
+ |
sqltRollback, |
205 |
+ |
sqltRow, |
206 |
+ |
sqltRows, |
207 |
+ |
sqltRow_Count, |
208 |
+ |
sqltSavepoint, |
209 |
+ |
sqltScroll, |
210 |
+ |
sqltSecond, |
211 |
+ |
sqltSelect, |
212 |
+ |
sqltSensitive, |
213 |
+ |
sqltSet, |
214 |
+ |
sqltSimilar, |
215 |
+ |
sqltSmallint, |
216 |
+ |
sqltSome, |
217 |
+ |
sqltSqlcode, |
218 |
+ |
sqltSqlstate, |
219 |
+ |
sqltStart, |
220 |
+ |
sqltStddev_Pop, |
221 |
+ |
sqltStddev_Samp, |
222 |
+ |
sqltSum, |
223 |
+ |
sqltTable, |
224 |
+ |
sqltThen, |
225 |
+ |
sqltTime, |
226 |
+ |
sqltTimestamp, |
227 |
+ |
sqltTo, |
228 |
+ |
sqltTrailing, |
229 |
+ |
sqltTrigger, |
230 |
+ |
sqltTrim, |
231 |
+ |
sqltTrue, |
232 |
+ |
sqltUnion, |
233 |
+ |
sqltUnique, |
234 |
+ |
sqltUnknown, |
235 |
+ |
sqltUpdate, |
236 |
+ |
sqltUpdating, |
237 |
+ |
sqltUpper, |
238 |
+ |
sqltUser, |
239 |
+ |
sqltUsing, |
240 |
+ |
sqltValue, |
241 |
+ |
sqltValues, |
242 |
+ |
sqltVar_Pop, |
243 |
+ |
sqltVar_Samp, |
244 |
+ |
sqltVarchar, |
245 |
+ |
sqltVariable, |
246 |
+ |
sqltVarying, |
247 |
+ |
sqltView, |
248 |
+ |
sqltWhen, |
249 |
+ |
sqltWhere, |
250 |
+ |
sqltWhile, |
251 |
+ |
sqltWith, |
252 |
+ |
sqltYear, |
253 |
+ |
|
254 |
+ |
{symbols} |
255 |
+ |
|
256 |
+ |
sqltSpace, |
257 |
+ |
sqltSemiColon, |
258 |
+ |
sqltPlaceholder, |
259 |
+ |
sqltSingleQuotes, |
260 |
+ |
sqltDoubleQuotes, |
261 |
+ |
sqltBackslash, |
262 |
+ |
sqltComma, |
263 |
+ |
sqltPeriod, |
264 |
+ |
sqltEquals, |
265 |
+ |
sqltOtherCharacter, |
266 |
+ |
sqltIdentifier, |
267 |
+ |
sqltIdentifierInDoubleQuotes, |
268 |
+ |
sqltNumberString, |
269 |
+ |
sqltString, |
270 |
+ |
sqltParam, |
271 |
+ |
sqltQuotedParam, |
272 |
+ |
sqltColon, |
273 |
+ |
sqltComment, |
274 |
+ |
sqltCommentLine, |
275 |
+ |
sqltQuotedString, |
276 |
+ |
sqltAsterisk, |
277 |
+ |
sqltForwardSlash, |
278 |
+ |
sqltOpenSquareBracket, |
279 |
+ |
sqltCloseSquareBracket, |
280 |
+ |
sqltOpenBracket, |
281 |
+ |
sqltCloseBracket, |
282 |
+ |
sqltPipe, |
283 |
+ |
sqltConcatSymbol, |
284 |
+ |
sqltLT, |
285 |
+ |
sqltGT, |
286 |
+ |
sqltCR, |
287 |
+ |
sqltEOL, |
288 |
+ |
sqltEOF, |
289 |
+ |
sqltInit |
290 |
+ |
); |
291 |
+ |
|
292 |
+ |
TSQLReservedWords = sqltAdd..sqltYear; |
293 |
+ |
|
294 |
|
const |
295 |
|
CRLF = #13 + #10; |
296 |
|
CR = #13; |
298 |
|
TAB = #9; |
299 |
|
NULL_TERMINATOR = #0; |
300 |
|
|
301 |
< |
sqlReservedWords: array [0..198] of string = ( |
301 |
> |
{$IFNDEF FPC} |
302 |
> |
LineEnding = CRLF; |
303 |
> |
{$ENDIF} |
304 |
> |
|
305 |
> |
{SQL Reserved words in alphabetical order} |
306 |
> |
|
307 |
> |
sqlReservedWords: array [TSQLReservedWords] of string = ( |
308 |
|
'ADD', |
309 |
|
'ADMIN', |
310 |
|
'ALL', |
456 |
|
'RIGHT', |
457 |
|
'ROLLBACK', |
458 |
|
'ROW', |
209 |
– |
'ROW_COUNT', |
459 |
|
'ROWS', |
460 |
+ |
'ROW_COUNT', |
461 |
|
'SAVEPOINT', |
462 |
|
'SCROLL', |
463 |
|
'SECOND', |
469 |
|
'SOME', |
470 |
|
'SQLCODE', |
471 |
|
'SQLSTATE', |
222 |
– |
'SQLSTATE', |
472 |
|
'START', |
473 |
|
'STDDEV_POP', |
474 |
|
'STDDEV_SAMP', |
505 |
|
'YEAR' |
506 |
|
); |
507 |
|
|
508 |
+ |
type |
509 |
+ |
{The TSQLTokeniser class provides a common means to parse an SQL statement, or |
510 |
+ |
even a stream of SQL Statements. The TSQLStringTokeniser class is instantiated |
511 |
+ |
with a single SQL statement or a set of concatenated statements. The TSQLStreamTokeniser |
512 |
+ |
is instantiated with a stream from which the SQL statements are read. |
513 |
+ |
|
514 |
+ |
Successive calls to GetNextToken then return each SQL token. The TokenText contains |
515 |
+ |
either the single character, the identifier or reserved word, the string or comment.} |
516 |
+ |
|
517 |
+ |
{ TSQLTokeniser } |
518 |
+ |
|
519 |
+ |
TSQLTokeniser = class |
520 |
+ |
private |
521 |
+ |
const |
522 |
+ |
TokenQueueMaxSize = 64; |
523 |
+ |
type |
524 |
+ |
TLexState = (stDefault, stInCommentLine, stInComment, stSingleQuoted, stDoubleQuoted, |
525 |
+ |
stInIdentifier, stInNumeric); |
526 |
+ |
|
527 |
+ |
TTokenQueueItem = record |
528 |
+ |
token: TSQLTokens; |
529 |
+ |
text: AnsiString; |
530 |
+ |
end; |
531 |
+ |
TTokenQueueState = (tsHold, tsRelease); |
532 |
+ |
|
533 |
+ |
private |
534 |
+ |
FLastChar: AnsiChar; |
535 |
+ |
FState: TLexState; |
536 |
+ |
FSkipNext: boolean; |
537 |
+ |
function GetNext: TSQLTokens; |
538 |
+ |
|
539 |
+ |
{The token Queue is available for use by descendents so that they can |
540 |
+ |
hold back tokens in order to lookahead by token rather than just a single |
541 |
+ |
character} |
542 |
+ |
|
543 |
+ |
private |
544 |
+ |
FTokenQueue: array[0..TokenQueueMaxSize] of TTokenQueueItem; |
545 |
+ |
FQueueState: TTokenQueueState; |
546 |
+ |
FQFirst: integer; {first and last pointers first=last => queue empty} |
547 |
+ |
FQLast: integer; |
548 |
+ |
FEOF: boolean; |
549 |
+ |
procedure PopQueue(var token: TSQLTokens); |
550 |
+ |
protected |
551 |
+ |
FString: AnsiString; |
552 |
+ |
FNextToken: TSQLTokens; |
553 |
+ |
procedure Assign(source: TSQLTokeniser); virtual; |
554 |
+ |
function GetChar: AnsiChar; virtual; abstract; |
555 |
+ |
function TokenFound(var token: TSQLTokens): boolean; virtual; |
556 |
+ |
function InternalGetNextToken: TSQLTokens; virtual; |
557 |
+ |
procedure Reset; virtual; |
558 |
+ |
|
559 |
+ |
{Token stack} |
560 |
+ |
procedure QueueToken(token: TSQLTokens; text:AnsiString); overload; |
561 |
+ |
procedure QueueToken(token: TSQLTokens); overload; |
562 |
+ |
procedure ResetQueue; overload; |
563 |
+ |
procedure ResetQueue(token: TSQLTokens; text:AnsiString); overload; |
564 |
+ |
procedure ResetQueue(token: TSQLTokens); overload; |
565 |
+ |
procedure ReleaseQueue(var token: TSQLTokens); overload; |
566 |
+ |
procedure ReleaseQueue; overload; |
567 |
+ |
function GetQueuedText: AnsiString; |
568 |
+ |
procedure SetTokenText(text: AnsiString); |
569 |
+ |
|
570 |
+ |
public |
571 |
+ |
const |
572 |
+ |
DefaultTerminator = ';'; |
573 |
+ |
public |
574 |
+ |
constructor Create; |
575 |
+ |
destructor Destroy; override; |
576 |
+ |
function GetNextToken: TSQLTokens; |
577 |
+ |
property EOF: boolean read FEOF; |
578 |
+ |
property TokenText: AnsiString read FString; |
579 |
+ |
end; |
580 |
+ |
|
581 |
+ |
{ TSQLwithNamedParamsTokeniser } |
582 |
+ |
|
583 |
+ |
TSQLwithNamedParamsTokeniser = class(TSQLTokeniser) |
584 |
+ |
private |
585 |
+ |
type |
586 |
+ |
TSQLState = (stInit,stInParam,stInBlock, stInArrayDim); |
587 |
+ |
private |
588 |
+ |
FState: TSQLState; |
589 |
+ |
FNested: integer; |
590 |
+ |
protected |
591 |
+ |
procedure Assign(source: TSQLTokeniser); override; |
592 |
+ |
procedure Reset; override; |
593 |
+ |
function TokenFound(var token: TSQLTokens): boolean; override; |
594 |
+ |
end; |
595 |
+ |
|
596 |
+ |
{ TSQLParamProcessor } |
597 |
+ |
|
598 |
+ |
TSQLParamProcessor = class(TSQLwithNamedParamsTokeniser) |
599 |
+ |
private |
600 |
+ |
const |
601 |
+ |
sIBXParam = 'IBXParam'; {do not localize} |
602 |
+ |
private |
603 |
+ |
FInString: AnsiString; |
604 |
+ |
FIndex: integer; |
605 |
+ |
function DoExecute(GenerateParamNames: boolean; |
606 |
+ |
var slNames: TStrings): AnsiString; |
607 |
+ |
protected |
608 |
+ |
function GetChar: AnsiChar; override; |
609 |
+ |
public |
610 |
+ |
class function Execute(sSQL: AnsiString; GenerateParamNames: boolean; |
611 |
+ |
var slNames: TStrings): AnsiString; |
612 |
+ |
end; |
613 |
+ |
|
614 |
+ |
|
615 |
|
function Max(n1, n2: Integer): Integer; |
616 |
|
function Min(n1, n2: Integer): Integer; |
617 |
|
function RandomString(iLength: Integer): AnsiString; |
618 |
|
function RandomInteger(iLow, iHigh: Integer): Integer; |
619 |
|
function StripString(st: AnsiString; CharsToStrip: AnsiString): AnsiString; |
620 |
|
function ExtractIdentifier(Dialect: Integer; Value: AnsiString): AnsiString; |
621 |
+ |
function FindReservedWord(w: AnsiString; var token: TSQLTokens): boolean; |
622 |
+ |
function IsReservedWord(w: AnsiString): boolean; |
623 |
|
function QuoteIdentifier(Dialect: Integer; Value: AnsiString): AnsiString; |
624 |
|
function QuoteIdentifierIfNeeded(Dialect: Integer; Value: AnsiString): AnsiString; |
625 |
|
function Space2Underscore(s: AnsiString): AnsiString; |
635 |
|
|
636 |
|
implementation |
637 |
|
|
638 |
+ |
uses FBMessages |
639 |
+ |
|
640 |
|
{$IFDEF HASREQEX} |
641 |
< |
uses RegExpr; |
642 |
< |
{$ENDIF} |
641 |
> |
,RegExpr |
642 |
> |
{$ENDIF}; |
643 |
|
|
644 |
|
function Max(n1, n2: Integer): Integer; |
645 |
|
begin |
703 |
|
Result := Value; |
704 |
|
end; |
705 |
|
|
706 |
+ |
{Returns true if "w" is a Firebird SQL reserved word, and the |
707 |
+ |
corresponding TSQLTokens value.} |
708 |
+ |
|
709 |
+ |
function FindReservedWord(w: AnsiString; var token: TSQLTokens): boolean; |
710 |
+ |
var i: TSQLTokens; |
711 |
+ |
begin |
712 |
+ |
Result := true; |
713 |
+ |
w := AnsiUpperCase(Trim(w)); |
714 |
+ |
for i := Low(TSQLReservedWords) to High(TSQLReservedWords) do |
715 |
+ |
begin |
716 |
+ |
if w = sqlReservedWords[i] then |
717 |
+ |
begin |
718 |
+ |
token := i; |
719 |
+ |
Exit; |
720 |
+ |
end; |
721 |
+ |
if w < sqlReservedWords[i] then |
722 |
+ |
break; |
723 |
+ |
end; |
724 |
+ |
Result := false; |
725 |
+ |
end; |
726 |
+ |
|
727 |
|
{Returns true if "w" is a Firebird SQL reserved word} |
728 |
|
|
729 |
|
function IsReservedWord(w: AnsiString): boolean; |
730 |
< |
var i: integer; |
730 |
> |
var token: TSQLTokens; |
731 |
|
begin |
732 |
< |
Result := true; |
352 |
< |
for i := 0 to Length(sqlReservedWords) - 1 do |
353 |
< |
if w = sqlReservedWords[i] then |
354 |
< |
Exit; |
355 |
< |
Result := false; |
732 |
> |
Result := FindReservedWord(w,token); |
733 |
|
end; |
734 |
|
|
735 |
|
{Format an SQL Identifier according to SQL Dialect} |
994 |
|
Result := StringReplace(s,'''','''''',[rfReplaceAll]); |
995 |
|
end; |
996 |
|
|
997 |
+ |
{ TSQLParamProcessor } |
998 |
+ |
|
999 |
+ |
function TSQLParamProcessor.DoExecute(GenerateParamNames: boolean; |
1000 |
+ |
var slNames: TStrings): AnsiString; |
1001 |
+ |
var token: TSQLTokens; |
1002 |
+ |
iParamSuffix: Integer; |
1003 |
+ |
begin |
1004 |
+ |
Result := ''; |
1005 |
+ |
iParamSuffix := 0; |
1006 |
+ |
|
1007 |
+ |
while not EOF do |
1008 |
+ |
begin |
1009 |
+ |
token := GetNextToken; |
1010 |
+ |
case token of |
1011 |
+ |
sqltParam, |
1012 |
+ |
sqltQuotedParam: |
1013 |
+ |
begin |
1014 |
+ |
Result := Result + '?'; |
1015 |
+ |
slNames.Add(TokenText); |
1016 |
+ |
end; |
1017 |
+ |
|
1018 |
+ |
sqltPlaceHolder: |
1019 |
+ |
if GenerateParamNames then |
1020 |
+ |
begin |
1021 |
+ |
Inc(iParamSuffix); |
1022 |
+ |
slNames.AddObject(sIBXParam + IntToStr(iParamSuffix),self); //Note local convention |
1023 |
+ |
//add pointer to self to mark entry |
1024 |
+ |
Result := Result + '?'; |
1025 |
+ |
end |
1026 |
+ |
else |
1027 |
+ |
IBError(ibxeSQLParseError, [SParamNameExpected]); |
1028 |
+ |
|
1029 |
+ |
sqltQuotedString: |
1030 |
+ |
Result := Result + '''' + SQLSafeString(TokenText) + ''''; |
1031 |
+ |
|
1032 |
+ |
sqltIdentifierInDoubleQuotes: |
1033 |
+ |
Result := Result + '"' + StringReplace(TokenText,'"','""',[rfReplaceAll]) + '"'; |
1034 |
+ |
|
1035 |
+ |
sqltComment: |
1036 |
+ |
Result := Result + '/*' + TokenText + '*/'; |
1037 |
+ |
|
1038 |
+ |
sqltCommentLine: |
1039 |
+ |
Result := Result + '//' + TokenText + LineEnding; |
1040 |
+ |
|
1041 |
+ |
sqltEOL: |
1042 |
+ |
Result := Result + LineEnding; |
1043 |
+ |
|
1044 |
+ |
else |
1045 |
+ |
Result := Result + TokenText; |
1046 |
+ |
end; |
1047 |
+ |
end; |
1048 |
+ |
end; |
1049 |
+ |
|
1050 |
+ |
function TSQLParamProcessor.GetChar: AnsiChar; |
1051 |
+ |
begin |
1052 |
+ |
if FIndex <= Length(FInString) then |
1053 |
+ |
begin |
1054 |
+ |
Result := FInString[FIndex]; |
1055 |
+ |
Inc(FIndex); |
1056 |
+ |
end |
1057 |
+ |
else |
1058 |
+ |
Result := #0; |
1059 |
+ |
end; |
1060 |
+ |
|
1061 |
+ |
class function TSQLParamProcessor.Execute(sSQL: AnsiString; |
1062 |
+ |
GenerateParamNames: boolean; var slNames: TStrings): AnsiString; |
1063 |
+ |
begin |
1064 |
+ |
with self.Create do |
1065 |
+ |
try |
1066 |
+ |
FInString := sSQL; |
1067 |
+ |
FIndex := 1; |
1068 |
+ |
Result := DoExecute(GenerateParamNames,slNames); |
1069 |
+ |
finally |
1070 |
+ |
Free; |
1071 |
+ |
end; |
1072 |
+ |
end; |
1073 |
+ |
|
1074 |
+ |
{ TSQLwithNamedParamsTokeniser } |
1075 |
+ |
|
1076 |
+ |
procedure TSQLwithNamedParamsTokeniser.Assign(source: TSQLTokeniser); |
1077 |
+ |
begin |
1078 |
+ |
inherited Assign(source); |
1079 |
+ |
if source is TSQLwithNamedParamsTokeniser then |
1080 |
+ |
begin |
1081 |
+ |
FState := TSQLwithNamedParamsTokeniser(source).FState; |
1082 |
+ |
FNested := TSQLwithNamedParamsTokeniser(source).FNested; |
1083 |
+ |
end; |
1084 |
+ |
end; |
1085 |
+ |
|
1086 |
+ |
procedure TSQLwithNamedParamsTokeniser.Reset; |
1087 |
+ |
begin |
1088 |
+ |
inherited Reset; |
1089 |
+ |
FState := stInit; |
1090 |
+ |
FNested := 0; |
1091 |
+ |
end; |
1092 |
+ |
|
1093 |
+ |
function TSQLwithNamedParamsTokeniser.TokenFound(var token: TSQLTokens |
1094 |
+ |
): boolean; |
1095 |
+ |
begin |
1096 |
+ |
Result := inherited TokenFound(token); |
1097 |
+ |
if not Result then Exit; |
1098 |
+ |
|
1099 |
+ |
case FState of |
1100 |
+ |
stInit: |
1101 |
+ |
begin |
1102 |
+ |
case token of |
1103 |
+ |
sqltColon: |
1104 |
+ |
begin |
1105 |
+ |
FState := stInParam; |
1106 |
+ |
ResetQueue(token); |
1107 |
+ |
end; |
1108 |
+ |
|
1109 |
+ |
sqltBegin: |
1110 |
+ |
begin |
1111 |
+ |
FState := stInBlock; |
1112 |
+ |
FNested := 1; |
1113 |
+ |
end; |
1114 |
+ |
|
1115 |
+ |
sqltOpenSquareBracket: |
1116 |
+ |
FState := stInArrayDim; |
1117 |
+ |
|
1118 |
+ |
end; |
1119 |
+ |
end; |
1120 |
+ |
|
1121 |
+ |
stInParam: |
1122 |
+ |
begin |
1123 |
+ |
case token of |
1124 |
+ |
sqltIdentifier: |
1125 |
+ |
token := sqltParam; |
1126 |
+ |
|
1127 |
+ |
sqltIdentifierInDoubleQuotes: |
1128 |
+ |
token := sqltQuotedParam; |
1129 |
+ |
|
1130 |
+ |
else |
1131 |
+ |
begin |
1132 |
+ |
QueueToken(token); |
1133 |
+ |
ReleaseQueue(token); |
1134 |
+ |
end; |
1135 |
+ |
end; |
1136 |
+ |
FState := stInit; |
1137 |
+ |
end; |
1138 |
+ |
|
1139 |
+ |
stInBlock: |
1140 |
+ |
begin |
1141 |
+ |
case token of |
1142 |
+ |
sqltBegin: |
1143 |
+ |
Inc(FNested); |
1144 |
+ |
|
1145 |
+ |
sqltEnd: |
1146 |
+ |
begin |
1147 |
+ |
Dec(FNested); |
1148 |
+ |
if FNested = 0 then |
1149 |
+ |
FState := stInit; |
1150 |
+ |
end; |
1151 |
+ |
end; |
1152 |
+ |
end; |
1153 |
+ |
|
1154 |
+ |
stInArrayDim: |
1155 |
+ |
begin |
1156 |
+ |
if token = sqltCloseSquareBracket then |
1157 |
+ |
FState := stInit; |
1158 |
+ |
end; |
1159 |
+ |
end; |
1160 |
+ |
|
1161 |
+ |
Result := (FState <> stInParam); |
1162 |
+ |
end; |
1163 |
+ |
|
1164 |
+ |
{ TSQLTokeniser } |
1165 |
+ |
|
1166 |
+ |
function TSQLTokeniser.GetNext: TSQLTokens; |
1167 |
+ |
var C: AnsiChar; |
1168 |
+ |
begin |
1169 |
+ |
if EOF then |
1170 |
+ |
Result := sqltEOF |
1171 |
+ |
else |
1172 |
+ |
begin |
1173 |
+ |
C := GetChar; |
1174 |
+ |
case C of |
1175 |
+ |
#0: |
1176 |
+ |
Result := sqltEOF; |
1177 |
+ |
' ',TAB: |
1178 |
+ |
Result := sqltSpace; |
1179 |
+ |
'0'..'9': |
1180 |
+ |
Result := sqltNumberString; |
1181 |
+ |
';': |
1182 |
+ |
Result := sqltSemiColon; |
1183 |
+ |
'?': |
1184 |
+ |
Result := sqltPlaceholder; |
1185 |
+ |
'|': |
1186 |
+ |
Result := sqltPipe; |
1187 |
+ |
'"': |
1188 |
+ |
Result := sqltDoubleQuotes; |
1189 |
+ |
'''': |
1190 |
+ |
Result := sqltSingleQuotes; |
1191 |
+ |
'/': |
1192 |
+ |
Result := sqltForwardSlash; |
1193 |
+ |
'\': |
1194 |
+ |
Result := sqltBackslash; |
1195 |
+ |
'*': |
1196 |
+ |
Result := sqltAsterisk; |
1197 |
+ |
'(': |
1198 |
+ |
Result := sqltOpenBracket; |
1199 |
+ |
')': |
1200 |
+ |
Result := sqltCloseBracket; |
1201 |
+ |
':': |
1202 |
+ |
Result := sqltColon; |
1203 |
+ |
',': |
1204 |
+ |
Result := sqltComma; |
1205 |
+ |
'.': |
1206 |
+ |
Result := sqltPeriod; |
1207 |
+ |
'=': |
1208 |
+ |
Result := sqltEquals; |
1209 |
+ |
'[': |
1210 |
+ |
Result := sqltOpenSquareBracket; |
1211 |
+ |
']': |
1212 |
+ |
Result := sqltCloseSquareBracket; |
1213 |
+ |
'<': |
1214 |
+ |
Result := sqltLT; |
1215 |
+ |
'>': |
1216 |
+ |
Result := sqltGT; |
1217 |
+ |
CR: |
1218 |
+ |
Result := sqltCR; |
1219 |
+ |
LF: |
1220 |
+ |
Result := sqltEOL; |
1221 |
+ |
else |
1222 |
+ |
if C in ValidSQLIdentifierChars then |
1223 |
+ |
Result := sqltIdentifier |
1224 |
+ |
else |
1225 |
+ |
Result := sqltOtherCharacter; |
1226 |
+ |
end; |
1227 |
+ |
FLastChar := C |
1228 |
+ |
end; |
1229 |
+ |
FNextToken := Result; |
1230 |
+ |
end; |
1231 |
+ |
|
1232 |
+ |
procedure TSQLTokeniser.PopQueue(var token: TSQLTokens); |
1233 |
+ |
begin |
1234 |
+ |
if FQFirst = FQLast then |
1235 |
+ |
IBError(ibxeTokenQueueUnderflow,[]); |
1236 |
+ |
token := FTokenQueue[FQFirst].token; |
1237 |
+ |
FString := FTokenQueue[FQFirst].text; |
1238 |
+ |
Inc(FQFirst); |
1239 |
+ |
if FQFirst = FQLast then |
1240 |
+ |
FQueueState := tsHold; |
1241 |
+ |
end; |
1242 |
+ |
|
1243 |
+ |
procedure TSQLTokeniser.Assign(source: TSQLTokeniser); |
1244 |
+ |
begin |
1245 |
+ |
FString := source.FString; |
1246 |
+ |
FNextToken := source.FNextToken; |
1247 |
+ |
FTokenQueue := source.FTokenQueue; |
1248 |
+ |
FQueueState := source.FQueueState; |
1249 |
+ |
FQFirst := source.FQFirst; |
1250 |
+ |
FQLast := source.FQLast; |
1251 |
+ |
end; |
1252 |
+ |
|
1253 |
+ |
function TSQLTokeniser.TokenFound(var token: TSQLTokens): boolean; |
1254 |
+ |
begin |
1255 |
+ |
Result := (FState = stDefault); |
1256 |
+ |
if Result and (token = sqltIdentifier) then |
1257 |
+ |
FindReservedWord(FString,token); |
1258 |
+ |
end; |
1259 |
+ |
|
1260 |
+ |
procedure TSQLTokeniser.QueueToken(token: TSQLTokens; text: AnsiString); |
1261 |
+ |
begin |
1262 |
+ |
if FQLast > TokenQueueMaxSize then |
1263 |
+ |
IBError(ibxeTokenQueueOverflow,[]); |
1264 |
+ |
FTokenQueue[FQLast].token := token; |
1265 |
+ |
FTokenQueue[FQLast].text := text; |
1266 |
+ |
Inc(FQLast); |
1267 |
+ |
end; |
1268 |
+ |
|
1269 |
+ |
procedure TSQLTokeniser.QueueToken(token: TSQLTokens); |
1270 |
+ |
begin |
1271 |
+ |
QueueToken(token,TokenText); |
1272 |
+ |
end; |
1273 |
+ |
|
1274 |
+ |
procedure TSQLTokeniser.ResetQueue; |
1275 |
+ |
begin |
1276 |
+ |
FQFirst := 0; |
1277 |
+ |
FQLast := 0; |
1278 |
+ |
FQueueState := tsHold; |
1279 |
+ |
end; |
1280 |
+ |
|
1281 |
+ |
procedure TSQLTokeniser.ResetQueue(token: TSQLTokens; text: AnsiString); |
1282 |
+ |
begin |
1283 |
+ |
ResetQueue; |
1284 |
+ |
QueueToken(token,text); |
1285 |
+ |
end; |
1286 |
+ |
|
1287 |
+ |
procedure TSQLTokeniser.ResetQueue(token: TSQLTokens); |
1288 |
+ |
begin |
1289 |
+ |
ResetQueue; |
1290 |
+ |
QueueToken(token); |
1291 |
+ |
end; |
1292 |
+ |
|
1293 |
+ |
procedure TSQLTokeniser.ReleaseQueue(var token: TSQLTokens); |
1294 |
+ |
begin |
1295 |
+ |
FQueueState := tsRelease; |
1296 |
+ |
PopQueue(token); |
1297 |
+ |
end; |
1298 |
+ |
|
1299 |
+ |
procedure TSQLTokeniser.ReleaseQueue; |
1300 |
+ |
begin |
1301 |
+ |
FQueueState := tsRelease; |
1302 |
+ |
end; |
1303 |
+ |
|
1304 |
+ |
function TSQLTokeniser.GetQueuedText: AnsiString; |
1305 |
+ |
var i: integer; |
1306 |
+ |
begin |
1307 |
+ |
Result := ''; |
1308 |
+ |
for i := FQFirst to FQLast do |
1309 |
+ |
Result := Result + FTokenQueue[i].text; |
1310 |
+ |
end; |
1311 |
+ |
|
1312 |
+ |
procedure TSQLTokeniser.SetTokenText(text: AnsiString); |
1313 |
+ |
begin |
1314 |
+ |
FString := text; |
1315 |
+ |
end; |
1316 |
+ |
|
1317 |
+ |
constructor TSQLTokeniser.Create; |
1318 |
+ |
begin |
1319 |
+ |
inherited Create; |
1320 |
+ |
Reset; |
1321 |
+ |
end; |
1322 |
+ |
|
1323 |
+ |
destructor TSQLTokeniser.Destroy; |
1324 |
+ |
begin |
1325 |
+ |
Reset; |
1326 |
+ |
inherited Destroy; |
1327 |
+ |
end; |
1328 |
+ |
|
1329 |
+ |
procedure TSQLTokeniser.Reset; |
1330 |
+ |
begin |
1331 |
+ |
FNextToken := sqltInit; |
1332 |
+ |
FState := stDefault; |
1333 |
+ |
FString := ''; |
1334 |
+ |
FEOF := false; |
1335 |
+ |
ResetQueue; |
1336 |
+ |
end; |
1337 |
+ |
|
1338 |
+ |
function TSQLTokeniser.GetNextToken: TSQLTokens; |
1339 |
+ |
begin |
1340 |
+ |
if FQueueState = tsRelease then |
1341 |
+ |
repeat |
1342 |
+ |
PopQueue(Result); |
1343 |
+ |
FEOF := Result = sqltEOF; |
1344 |
+ |
if TokenFound(Result) then |
1345 |
+ |
Exit; |
1346 |
+ |
until FQueueState <> tsRelease; |
1347 |
+ |
|
1348 |
+ |
Result := InternalGetNextToken; |
1349 |
+ |
end; |
1350 |
+ |
|
1351 |
+ |
{a simple lookahead one algorithm to extra the next symbol} |
1352 |
+ |
|
1353 |
+ |
function TSQLTokeniser.InternalGetNextToken: TSQLTokens; |
1354 |
+ |
var C: AnsiChar; |
1355 |
+ |
begin |
1356 |
+ |
Result := sqltEOF; |
1357 |
+ |
|
1358 |
+ |
if FNextToken = sqltInit then |
1359 |
+ |
GetNext; |
1360 |
+ |
|
1361 |
+ |
repeat |
1362 |
+ |
Result := FNextToken; |
1363 |
+ |
C := FLastChar; |
1364 |
+ |
GetNext; |
1365 |
+ |
|
1366 |
+ |
if FSkipNext then |
1367 |
+ |
begin |
1368 |
+ |
FSkipNext := false; |
1369 |
+ |
continue; |
1370 |
+ |
end; |
1371 |
+ |
|
1372 |
+ |
case FState of |
1373 |
+ |
stInComment: |
1374 |
+ |
begin |
1375 |
+ |
if (Result = sqltAsterisk) and (FNextToken = sqltForwardSlash) then |
1376 |
+ |
begin |
1377 |
+ |
FState := stDefault; |
1378 |
+ |
Result := sqltComment; |
1379 |
+ |
GetNext; |
1380 |
+ |
end |
1381 |
+ |
else |
1382 |
+ |
FString := FString + C; |
1383 |
+ |
end; |
1384 |
+ |
|
1385 |
+ |
stInCommentLine: |
1386 |
+ |
begin |
1387 |
+ |
case Result of |
1388 |
+ |
sqltEOL: |
1389 |
+ |
begin |
1390 |
+ |
FState := stDefault; |
1391 |
+ |
Result := sqltCommentLine; |
1392 |
+ |
end; |
1393 |
+ |
|
1394 |
+ |
sqltCR: {ignore}; |
1395 |
+ |
|
1396 |
+ |
else |
1397 |
+ |
FString := FString + C; |
1398 |
+ |
end; |
1399 |
+ |
end; |
1400 |
+ |
|
1401 |
+ |
stSingleQuoted: |
1402 |
+ |
begin |
1403 |
+ |
if (Result = sqltSingleQuotes) then |
1404 |
+ |
begin |
1405 |
+ |
if (FNextToken = sqltSingleQuotes) then |
1406 |
+ |
begin |
1407 |
+ |
FSkipNext := true; |
1408 |
+ |
FString := FString + C; |
1409 |
+ |
end |
1410 |
+ |
else |
1411 |
+ |
begin |
1412 |
+ |
Result := sqltQuotedString; |
1413 |
+ |
FState := stDefault; |
1414 |
+ |
end; |
1415 |
+ |
end |
1416 |
+ |
else |
1417 |
+ |
FString := FString + C; |
1418 |
+ |
end; |
1419 |
+ |
|
1420 |
+ |
stDoubleQuoted: |
1421 |
+ |
begin |
1422 |
+ |
if (Result = sqltDoubleQuotes) then |
1423 |
+ |
begin |
1424 |
+ |
if (FNextToken = sqltDoubleQuotes) then |
1425 |
+ |
begin |
1426 |
+ |
FSkipNext := true; |
1427 |
+ |
FString := FString + C; |
1428 |
+ |
end |
1429 |
+ |
else |
1430 |
+ |
begin |
1431 |
+ |
Result := sqltIdentifierInDoubleQuotes; |
1432 |
+ |
FState := stDefault; |
1433 |
+ |
end; |
1434 |
+ |
end |
1435 |
+ |
else |
1436 |
+ |
FString := FString + C; |
1437 |
+ |
end; |
1438 |
+ |
|
1439 |
+ |
stInIdentifier: |
1440 |
+ |
begin |
1441 |
+ |
FString := FString + C; |
1442 |
+ |
Result := sqltIdentifier; |
1443 |
+ |
if not (FNextToken in [sqltIdentifier,sqltNumberString]) then |
1444 |
+ |
FState := stDefault |
1445 |
+ |
end; |
1446 |
+ |
|
1447 |
+ |
stInNumeric: |
1448 |
+ |
begin |
1449 |
+ |
FString := FString + C; |
1450 |
+ |
if (Result = sqltPeriod) and (FNextToken = sqltPeriod) then |
1451 |
+ |
begin |
1452 |
+ |
{malformed decimal} |
1453 |
+ |
FState := stInIdentifier; |
1454 |
+ |
Result := sqltIdentifier |
1455 |
+ |
end |
1456 |
+ |
else |
1457 |
+ |
begin |
1458 |
+ |
if not (FNextToken in [sqltNumberString,sqltPeriod]) then |
1459 |
+ |
FState := stDefault; |
1460 |
+ |
Result := sqltNumberString; |
1461 |
+ |
end; |
1462 |
+ |
end; |
1463 |
+ |
|
1464 |
+ |
else {stDefault} |
1465 |
+ |
begin |
1466 |
+ |
FString := C; |
1467 |
+ |
case Result of |
1468 |
+ |
|
1469 |
+ |
sqltPipe: |
1470 |
+ |
if FNextToken = sqltPipe then |
1471 |
+ |
begin |
1472 |
+ |
Result := sqltConcatSymbol; |
1473 |
+ |
FString := C + FLastChar; |
1474 |
+ |
GetNext; |
1475 |
+ |
end; |
1476 |
+ |
|
1477 |
+ |
sqltForwardSlash: |
1478 |
+ |
begin |
1479 |
+ |
if FNextToken = sqltAsterisk then |
1480 |
+ |
begin |
1481 |
+ |
FString := ''; |
1482 |
+ |
GetNext; |
1483 |
+ |
FState := stInComment; |
1484 |
+ |
end |
1485 |
+ |
else |
1486 |
+ |
if FNextToken = sqltForwardSlash then |
1487 |
+ |
begin |
1488 |
+ |
FString := ''; |
1489 |
+ |
GetNext; |
1490 |
+ |
FState := stInCommentLine; |
1491 |
+ |
end; |
1492 |
+ |
end; |
1493 |
+ |
|
1494 |
+ |
sqltSingleQuotes: |
1495 |
+ |
begin |
1496 |
+ |
FString := ''; |
1497 |
+ |
FState := stSingleQuoted; |
1498 |
+ |
end; |
1499 |
+ |
|
1500 |
+ |
sqltDoubleQuotes: |
1501 |
+ |
begin |
1502 |
+ |
FString := ''; |
1503 |
+ |
FState := stDoubleQuoted; |
1504 |
+ |
end; |
1505 |
+ |
|
1506 |
+ |
sqltIdentifier: |
1507 |
+ |
if FNextToken in [sqltIdentifier,sqltNumberString] then |
1508 |
+ |
FState := stInIdentifier; |
1509 |
+ |
|
1510 |
+ |
sqltNumberString: |
1511 |
+ |
if FNextToken in [sqltNumberString,sqltPeriod] then |
1512 |
+ |
FState := stInNumeric; |
1513 |
+ |
end; |
1514 |
+ |
end; |
1515 |
+ |
end; |
1516 |
+ |
|
1517 |
+ |
// writeln(FString); |
1518 |
+ |
FEOF := Result = sqltEOF; |
1519 |
+ |
until TokenFound(Result) or EOF; |
1520 |
+ |
end; |
1521 |
+ |
|
1522 |
|
end. |