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* Fixes Sql parsing problems with spaces lacking between keyword and expression
(like where(id=0) ) Mantis #21965, patch by Ludo, updated by Lacak2. git-svn-id: trunk@21742 -
This commit is contained in:
marco
parent
65e701a198
commit
c4ec774c4c
@ -1010,7 +1010,7 @@ begin
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end;
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if FWhereStartPos = 0 then
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SQLstr := SQLstr + ' where (' + Filter + ')'
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SQLstr := SQLstr + ' where (' + ServerFilter + ')'
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else if FWhereStopPos > 0 then
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system.insert(' and ('+ServerFilter+') ',SQLstr,FWhereStopPos+2)
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else
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@ -1217,18 +1217,17 @@ end;
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function TCustomSQLQuery.SQLParser(const ASQL : string) : TStatementType;
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type TParsePart = (ppStart,ppWith,ppSelect,ppFrom,ppWhere,ppGroup,ppOrder,ppComment,ppBogus);
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type TParsePart = (ppStart,ppWith,ppSelect,ppTableName,ppFrom,ppWhere,ppGroup,ppOrder,ppBogus);
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TPhraseSeparator = (sepNone, sepWhiteSpace, sepComma, sepComment, sepParentheses, sepEnd);
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Var
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PSQL,CurrentP,
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PSQL, CurrentP, SavedP,
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PhraseP, PStatementPart : pchar;
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S : string;
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ParsePart : TParsePart;
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StrLength : Integer;
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EndOfComment : Boolean;
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BracketCount : Integer;
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ConnOptions : TConnOptions;
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FFromPart : String;
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Separator : TPhraseSeparator;
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begin
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PSQL:=Pchar(ASQL);
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@ -1237,42 +1236,57 @@ begin
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CurrentP := PSQL-1;
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PhraseP := PSQL;
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FTableName := '';
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FUpdateable := False;
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FWhereStartPos := 0;
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FWhereStopPos := 0;
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ConnOptions := TSQLConnection(DataBase).ConnOptions;
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FUpdateable := False;
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repeat
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begin
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inc(CurrentP);
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SavedP := CurrentP;
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EndOfComment := SkipComments(CurrentP, sqEscapeSlash in ConnOptions, sqEscapeRepeat in ConnOptions);
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if EndOfcomment then dec(CurrentP);
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if EndOfComment and (ParsePart = ppStart) then PhraseP := CurrentP;
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// skip everything between bracket, since it could be a sub-select, and
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// further nothing between brackets could be interesting for the parser.
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if CurrentP^='(' then
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begin
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inc(currentp);
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BracketCount := 0;
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while (currentp^ <> #0) and ((currentp^ <> ')') or (BracketCount > 0 )) do
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case CurrentP^ of
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' ', #9, #10, #11, #12, #13:
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Separator := sepWhiteSpace;
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',':
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Separator := sepComma;
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#0, ';':
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Separator := sepEnd;
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'(':
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begin
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if currentp^ = '(' then inc(bracketcount)
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else if currentp^ = ')' then dec(bracketcount);
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inc(currentp);
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Separator := sepParentheses;
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// skip everything between brackets, since it could be a sub-select, and
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// further nothing between brackets could be interesting for the parser.
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BracketCount := 1;
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repeat
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inc(CurrentP);
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if CurrentP^ = '(' then inc(BracketCount)
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else if CurrentP^ = ')' then dec(BracketCount);
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until (CurrentP^ = #0) or (BracketCount = 0);
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if CurrentP^ <> #0 then inc(CurrentP);
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end;
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EndOfComment := True;
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end;
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else
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if SkipComments(CurrentP, sqEscapeSlash in ConnOptions, sqEscapeRepeat in ConnOptions) then
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Separator := sepComment
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else
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Separator := sepNone;
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end;
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if EndOfComment or (CurrentP^ in [' ',#13,#10,#9,#0,';']) then
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if (CurrentP > SavedP) and (SavedP > PhraseP) then
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CurrentP := SavedP; // there is something before comment or left parenthesis
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if Separator <> sepNone then
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begin
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if (CurrentP-PhraseP > 0) or (CurrentP^ in [';',#0]) then
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if ((Separator in [sepWhitespace,sepComment]) and (PhraseP = SavedP)) then
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PhraseP := CurrentP; // skip comments(but not parentheses) and white spaces
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if (CurrentP-PhraseP > 0) or (Separator = sepEnd) then
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begin
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strLength := CurrentP-PhraseP;
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Setlength(S,strLength);
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if strLength > 0 then Move(PhraseP^,S[1],(strLength));
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SetString(s, PhraseP, CurrentP-PhraseP);
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s := uppercase(s);
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case ParsePart of
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@ -1284,7 +1298,6 @@ begin
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else break;
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end;
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if not FParseSQL then break;
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PStatementPart := CurrentP;
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end;
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ppWith : begin
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// WITH [RECURSIVE] CTE_name [ ( column_names ) ] AS ( CTE_query_definition ) [, ...]
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@ -1299,69 +1312,53 @@ begin
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end;
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ppSelect : begin
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if s = 'FROM' then
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ParsePart := ppTableName;
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end;
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ppTableName:
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begin
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// Meta-data requests are never updateable
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// and select-statements from more then one table
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// and/or derived tables are also not updateable
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if (FSchemaType = stNoSchema) and
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(Separator in [sepWhitespace, sepComment, sepEnd]) then
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begin
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ParsePart := ppFrom;
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PhraseP := CurrentP;
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PStatementPart := CurrentP;
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FTableName := s;
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FUpdateable := True;
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end;
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ParsePart := ppFrom;
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end;
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ppFrom : begin
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if (s = 'WHERE') or (s = 'ORDER') or (s = 'GROUP') or (s = 'LIMIT') or (CurrentP^=#0) or (CurrentP^=';') then
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if (s = 'WHERE') or (s = 'GROUP') or (s = 'ORDER') or (s = 'LIMIT') or (s = 'ROWS') or
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(Separator = sepEnd) then
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begin
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if (s = 'WHERE') then
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begin
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ParsePart := ppWhere;
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StrLength := PhraseP-PStatementPart;
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end
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else if (s = 'GROUP') then
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begin
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ParsePart := ppGroup;
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StrLength := PhraseP-PStatementPart;
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end
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else if (s = 'ORDER') then
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begin
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ParsePart := ppOrder;
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StrLength := PhraseP-PStatementPart
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end
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else if (s = 'LIMIT') then
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begin
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ParsePart := ppBogus;
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StrLength := PhraseP-PStatementPart
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end
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else
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begin
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ParsePart := ppBogus;
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StrLength := CurrentP-PStatementPart;
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end;
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if Result = stSelect then
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begin
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Setlength(FFromPart,StrLength);
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Move(PStatementPart^,FFromPart[1],(StrLength));
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FFromPart := trim(FFromPart);
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case s of
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'WHERE': ParsePart := ppWhere;
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'GROUP': ParsePart := ppGroup;
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'ORDER': ParsePart := ppOrder;
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else ParsePart := ppBogus;
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end;
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// Meta-data requests and are never updateable select-statements
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// from more then one table are not updateable
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if (FSchemaType=stNoSchema) and
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(ExtractStrings([',',' '],[],pchar(FFromPart),nil) = 1) then
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begin
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FUpdateable := True;
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FTableName := FFromPart;
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end;
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end;
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FWhereStartPos := PStatementPart-PSQL+StrLength+1;
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FWhereStartPos := PhraseP-PSQL+1;
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PStatementPart := CurrentP;
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end
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else
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// joined table or user_defined_function (...)
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if (s = 'JOIN') or (Separator in [sepComma, sepParentheses]) then
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begin
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FTableName := '';
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FUpdateable := False;
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end;
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end;
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ppWhere : begin
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if (s = 'ORDER') or (s = 'GROUP') or (s = 'LIMIT') or (CurrentP^=#0) or (CurrentP^=';') then
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if (s = 'GROUP') or (s = 'ORDER') or (s = 'LIMIT') or (s = 'ROWS') or
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(Separator = sepEnd) then
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begin
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ParsePart := ppBogus;
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FWhereStartPos := PStatementPart-PSQL;
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if (s = 'ORDER') or (s = 'GROUP') or (s = 'LIMIT') then
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FWhereStopPos := PhraseP-PSQL+1
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if (Separator = sepEnd) then
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FWhereStopPos := CurrentP-PSQL+1
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else
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FWhereStopPos := CurrentP-PSQL+1;
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FWhereStopPos := PhraseP-PSQL+1;
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end
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else if (s = 'UNION') then
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begin
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@ -1371,6 +1368,8 @@ begin
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end;
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end; {case}
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end;
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if Separator in [sepComment, sepParentheses] then
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dec(CurrentP);
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PhraseP := CurrentP+1;
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end
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end;
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@ -1381,7 +1380,6 @@ procedure TCustomSQLQuery.InternalOpen;
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var tel, fieldc : integer;
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f : TField;
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s : string;
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IndexFields : TStrings;
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ReadFromFile: Boolean;
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begin
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@ -38,7 +38,7 @@ type
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procedure TestInsertLargeStrFields; // bug 9600
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procedure TestNumericNames; // Bug9661
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procedure TestApplyUpdFieldnames; // Bug 12275;
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procedure TestLimitQuery; // bug 15456
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procedure TestServerFilter; // bug 15456
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procedure Test11Params;
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procedure TestRowsAffected; // bug 9758
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procedure TestLocateNull;
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@ -1438,7 +1438,13 @@ begin
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begin
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SQL.Text:='select TT.NAME from FPDEV left join FPDEV TT on TT.ID=FPDEV.ID';
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Open;
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close;
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AssertFalse(CanModify);
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Close;
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SQL.Text:='select T1.NAME from FPDEV T1,FPDEV T2 where T1.ID=T2.ID';
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Open;
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AssertFalse(CanModify);
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Close;
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end;
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end;
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end;
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@ -1565,25 +1571,57 @@ begin
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end;
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end;
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procedure TTestFieldTypes.TestLimitQuery;
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procedure TTestFieldTypes.TestServerFilter;
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begin
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with TSQLDBConnector(DBConnector) do
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begin
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with query do
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begin
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case sqlDBtype of
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interbase : SQL.Text:='select first 1 NAME from FPDEV where NAME=''TestName21''';
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mssql : SQL.Text:='select top 1 NAME from FPDEV where NAME=''TestName21''';
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else SQL.Text:='select NAME from FPDEV where NAME=''TestName21'' limit 1';
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end;
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Open;
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close;
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ServerFilter:='ID=21';
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ServerFiltered:=true;
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open;
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close;
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end;
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// Tests SQLParser and ServerFilter
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with TSQLDBConnector(DBConnector).Query do
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begin
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ServerFilter:='ID=21';
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ServerFiltered:=true;
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// tests parsing SELECT without WHERE
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SQL.Text:='select * from FPDEV';
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Open;
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CheckTrue(CanModify, SQL.Text);
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CheckEquals(1, RecordCount);
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Close;
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SQL.Text:='select *'#13'from FPDEV'#13'order by 1';
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Open;
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CheckTrue(CanModify, SQL.Text);
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CheckEquals(1, RecordCount);
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Close;
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// tests parsing SELECT with simple WHERE
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SQL.Text:='select *'#9'from FPDEV'#9'where NAME<>''''';
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Open;
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CheckTrue(CanModify, SQL.Text);
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CheckEquals(1, RecordCount);
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Close;
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// tests parsing SELECT with simple WHERE followed by ORDER BY
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SQL.Text:='select *'#10'from FPDEV'#10'where NAME>'''' order by 1';
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Open;
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CheckTrue(CanModify, SQL.Text);
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CheckEquals(1, RecordCount);
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Close;
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// tests parsing of WHERE ... LIMIT
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case sqlDBtype of
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interbase : SQL.Text:='select first 1 NAME from FPDEV where NAME=''TestName21''';
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mssql : SQL.Text:='select top 1 NAME from FPDEV where NAME=''TestName21''';
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else SQL.Text:='select NAME from FPDEV where NAME=''TestName21'' limit 1';
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end;
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Open;
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CheckTrue(CanModify, SQL.Text);
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Close;
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// tests parsing SELECT with table alias and embedded comments (MySQL requires space after -- )
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SQL.Text:='/**/select * from/**/FPDEV as fp-- comment'#13'where(NAME>''TestName20'')/**/order by 1';
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Open;
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CheckTrue(CanModify, SQL.Text);
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Close;
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end;
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end;
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procedure TTestFieldTypes.TestRowsAffected;
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