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tony |
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program parsertest;
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{$mode objfpc}{$H+}
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uses
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{$IFDEF UNIX}{$IFDEF UseCThreads}
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cthreads,
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{$ENDIF}{$ENDIF}
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Classes, SysUtils, CustApp, IBUtils
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{ you can add units after this };
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const
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TestStrings: array [0..4] of string = (
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'with recursive Depts As (' +
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'Select DEPT_NO, DEPARTMENT, "HEAD_DEPT", cast(DEPARTMENT as VarChar(256)) as DEPT_PATH /* test */,' +
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'cast(DEPT_NO as VarChar(64)) as DEPT_KEY_PATH ' + LF +
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'From DEPARTMENT Where HEAD_DEPT is NULL ' + LF +
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'UNION ALL' + CRLF +
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'Select D.DEPT_NO, D.DEPARTMENT, D.HEAD_DEPT, Depts.DEPT_PATH || '' / '' || D.DEPARTMENT as DEPT_PATH,' +
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'Depts.DEPT_KEY_PATH || '';'' || D.DEPT_NO as DEPT_KEY_PATH ' +
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'From DEPARTMENT D'+ CR +
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'JOIN Depts On D.HEAD_DEPT = Depts.DEPT_NO' + LF +
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')' +
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'//ignore' + LF +
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'Select distinct A.EMP_NO, A.FIRST_NAME, A.LAST_NAME, A.PHONE_EXT, A.HIRE_DATE, A.DEPT_NO, A.JOB_CODE, 2.2, 2..30 ' +
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'A.JOB_GRADE, A.JOB_COUNTRY, A.SALARY, A.FULL_NAME, D.DEPT_PATH, D.DEPT_KEY_PATH' + LF +
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'From EMPLOYEE A' + LF +
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'JOIN Depts D On D.DEPT_NO = A.DEPT_NO',
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'Update EMPLOYEE A Set '#13#10' A.DEPT_NO = :DEPT_NO,'#13#10 +
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' A.FIRST_NAME = ''Mr'' || :FIRST_NAME,'#13#10+
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' A.HIRE_DATE = :HIRE_DATE,'#13#10+
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' A.JOB_CODE = :JOB_CODE,'#13#10' A.JOB_COUNTRY = :JOB_COUNTRY,'#13#10+
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' A.JOB_GRADE = :JOB_GRADE,'#13#10' A.LAST_NAME = :LAST_NAME,'#13#10+
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' A.PHONE_EXT = :PHONE_EXT,'#13#10' A.SALARY = :SALARY ' +
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'Where A.EMP_NO = :OLD_EMP_NO;',
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'INSERT INTO EMPLOYEE (EMP_NO, FIRST_NAME, LAST_NAME, PHONE_EXT, HIRE_DATE,' +
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'DEPT_NO, JOB_CODE, JOB_GRADE, JOB_COUNTRY, SALARY /* what''s this */) '+
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'VALUES (:EMP_NO, :FIRST_NAME, :LAST_NAME, :PHONE_EXT, :HIRE_DATE, //end comment' + CRLF +
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':DEPT_NO, :"JOB""CODE", ''Tester''''s way'''''''''', :JOB_COUNTRY, :"$SALARY")',
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'Select * from EMPLOYEE Where EMP_NO = :EMP_NO',
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'') ;
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type
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{ SQLParserTest }
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SQLParserTest = class(TCustomApplication)
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private
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procedure WriteToken(token: TSQLTokens; text: string);
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procedure AnalyseSQL(S: string);
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procedure AnalyseAll;
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protected
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procedure DoRun; override;
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public
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constructor Create(TheOwner: TComponent); override;
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destructor Destroy; override;
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procedure WriteHelp; virtual;
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end;
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{ TSQLStringTokeniser }
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TSQLStringTokeniser = class(TSQLwithNamedParamsTokeniser)
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// TSQLStringTokeniser = class(TSQLTokeniser)
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private
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FInString: string;
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FIndex: integer;
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protected
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function GetChar: char; override;
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public
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constructor Create(S: string);
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end;
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{ TSQLStringTokeniser }
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function TSQLStringTokeniser.GetChar: char;
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begin
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if FIndex <= Length(FInString) then
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begin
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Result := FInString[FIndex];
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Inc(FIndex);
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end
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else
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Result := #0;
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end;
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constructor TSQLStringTokeniser.Create(S: string);
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begin
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inherited Create;
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FInString := S;
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FIndex := 1;
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end;
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{ SQLParserTest }
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procedure SQLParserTest.WriteToken(token: TSQLTokens; text: string);
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begin
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case token of
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sqltSpace:
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write('sqltSpace ');
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sqltSemiColon:
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write('sqltSemiColon ');
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sqltPlaceholder:
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write('sqltPlaceholder ');
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sqltPipe:
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write('sqltPipe ');
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sqltSingleQuotes:
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write('sqltSingleQuotes ');
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sqltDoubleQuotes:
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write('sqltDoubleQuotes ');
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sqltComma:
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write('sqltComma ');
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sqltEquals:
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write('sqltEquals ');
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sqltPeriod:
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write('sqltPeriod ');
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sqltIdentifier:
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write('sqltIdentifier ');
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sqltIdentifierInDoubleQuotes:
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write('sqltIdentifierInDoubleQuotes ');
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sqltNumberString:
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write('sqltNumberString ');
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sqltBadIdentifier:
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write('sqltBadIdentifier ');
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sqltString:
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write('sqltString ');
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sqltParam:
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write('sqlParam ');
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sqltQuotedParam:
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write('sqltQuotedParam ');
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sqltColon:
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write('sqltColon ');
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sqltComment:
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write('sqltComment ');
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sqltCommentLine:
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write('sqltCommentLine ');
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sqltQuotedString:
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write('sqltQuotedString ');
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sqltAsterisk:
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write('sqltAsterisk ');
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sqltForwardSlash:
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write('sqltForwardSlash ');
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sqltOpenSquareBracket:
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write('sqltOpenSquareBracket ');
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sqltCloseSquareBracket:
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write('sqltCloseSquareBracket ');
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sqltOpenBracket:
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write('sqltOpenBracket ');
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sqltCloseBracket:
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write('sqltCloseBracket ');
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sqltCR:
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write('sqltCR ');
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sqltEOL:
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write('sqltEOL ');
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sqltEOF:
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write('sqltEOF ');
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end;
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writeln('"',text,'" ');
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end;
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procedure SQLParserTest.AnalyseSQL(S: string);
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var SQLTokeniser: TSQLTokeniser;
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begin
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SQLTokeniser := TSQLStringTokeniser.Create(S);
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try
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writeln('Analysing:');
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writeln(S);
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writeln;
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while not SQLTokeniser.EOF do
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WriteToken(SQLTokeniser.GetNextToken,SQLTokeniser.TokenText);
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finally
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SQLTokeniser.Free;
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end;
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end;
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procedure SQLParserTest.AnalyseAll;
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var i: integer;
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begin
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for i := 0 to length(TestStrings) -1 do
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AnalyseSQL(TestStrings[i]);
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end;
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procedure SQLParserTest.DoRun;
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var
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ErrorMsg: String;
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begin
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// quick check parameters
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ErrorMsg := CheckOptions('h', 'help');
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if ErrorMsg <> '' then begin
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ShowException(Exception.Create(ErrorMsg));
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Terminate;
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Exit;
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end;
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// parse parameters
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if HasOption('h', 'help') then begin
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WriteHelp;
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Terminate;
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Exit;
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end;
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{ add your program here }
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AnalyseAll;
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Flush(output);
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readln;
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// stop program loop
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Terminate;
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end;
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constructor SQLParserTest.Create(TheOwner: TComponent);
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begin
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inherited Create(TheOwner);
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StopOnException := True;
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end;
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destructor SQLParserTest.Destroy;
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begin
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inherited Destroy;
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end;
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procedure SQLParserTest.WriteHelp;
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begin
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{ add your help code here }
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writeln('Usage: ', ExeName, ' -h');
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end;
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var
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Application: SQLParserTest;
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begin
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Application := SQLParserTest.Create(nil);
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Application.Title := 'SQL Parser Test';
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Application.Run;
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Application.Free;
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end.
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