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* Example to demonstrate how to create sql
git-svn-id: trunk@31154 -
This commit is contained in:
michael
parent
8b9daedf10
commit
3a746b76fa
2
.gitattributes
vendored
2
.gitattributes
vendored
@ -2057,6 +2057,8 @@ packages/fcl-base/texts/fptemplate.txt svneol=native#text/plain
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packages/fcl-db/Makefile svneol=native#text/plain
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packages/fcl-db/Makefile.fpc svneol=native#text/plain
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packages/fcl-db/Makefile.fpc.fpcmake svneol=native#text/plain
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packages/fcl-db/examples/createsql.lpi svneol=native#text/plain
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packages/fcl-db/examples/createsql.pas svneol=native#text/plain
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packages/fcl-db/examples/dbftool.lpi svneol=native#text/plain
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packages/fcl-db/examples/dbftool.lpr svneol=native#text/plain
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packages/fcl-db/examples/fbadmindemo.pp svneol=native#text/plain
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63
packages/fcl-db/examples/createsql.lpi
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63
packages/fcl-db/examples/createsql.lpi
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@ -0,0 +1,63 @@
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<?xml version="1.0" encoding="UTF-8"?>
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<CONFIG>
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<ProjectOptions>
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<Version Value="9"/>
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<General>
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<Flags>
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<MainUnitHasCreateFormStatements Value="False"/>
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</Flags>
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<SessionStorage Value="InProjectDir"/>
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<MainUnit Value="0"/>
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<Title Value="Generate SQL Demo"/>
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<UseAppBundle Value="False"/>
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<ResourceType Value="res"/>
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</General>
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<i18n>
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<EnableI18N LFM="False"/>
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</i18n>
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<VersionInfo>
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<StringTable ProductVersion=""/>
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</VersionInfo>
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<BuildModes Count="1">
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<Item1 Name="Default" Default="True"/>
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</BuildModes>
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<PublishOptions>
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<Version Value="2"/>
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</PublishOptions>
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<RunParams>
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<local>
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<FormatVersion Value="1"/>
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</local>
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</RunParams>
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<Units Count="1">
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<Unit0>
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<Filename Value="createsql.pas"/>
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<IsPartOfProject Value="True"/>
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</Unit0>
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</Units>
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</ProjectOptions>
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<CompilerOptions>
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<Version Value="11"/>
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<SearchPaths>
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<IncludeFiles Value="$(ProjOutDir)"/>
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</SearchPaths>
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<Parsing>
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<SyntaxOptions>
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<UseAnsiStrings Value="False"/>
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</SyntaxOptions>
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</Parsing>
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</CompilerOptions>
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<Debugging>
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<Exceptions Count="3">
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<Item1>
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<Name Value="EAbort"/>
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</Item1>
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<Item2>
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<Name Value="ECodetoolError"/>
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</Item2>
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<Item3>
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<Name Value="EFOpenError"/>
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</Item3>
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</Exceptions>
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</Debugging>
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</CONFIG>
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203
packages/fcl-db/examples/createsql.pas
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203
packages/fcl-db/examples/createsql.pas
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@ -0,0 +1,203 @@
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program createsql;
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{$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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typinfo, Classes, SysUtils, CustApp, db, sqldb, fpdatadict,
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fpddfb,fpddpq,fpddOracle,fpddsqlite3,fpddmysql40,fpddmysql41,fpddmysql50, fpddodbc,
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strutils;
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type
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{ TGenSQLApplication }
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TGenSQLApplication = class(TCustomApplication)
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private
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function CreateSQLEngine(AType: String): TFPDDSQLEngine;
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procedure ConnectToDatabase(const AType, ADatabaseName,AUserName,APassword: String);
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procedure DoConvertQuery(const S, T, KF: String; ST: TSTatementType);
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protected
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FConn : TSQLConnector;
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FDD : TFPDataDictionary;
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FENG : TFPDDSQLEngine;
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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(Const AMsg : string); virtual;
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end;
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{ TGenSQLApplication }
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procedure TGenSQLApplication.ConnectToDatabase(Const AType,ADatabaseName,AUSerName,APassword : String);
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begin
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FConn:=TSQLConnector.Create(Self);
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FConn.ConnectorType:=AType;
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FConn.DatabaseName:=ADatabaseName;
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FConn.UserName:=AUserName;
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FConn.Password:=APassword;
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FConn.Transaction:=TSQLTransaction.Create(Self);
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FConn.Connected:=True;
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FDD:=TFPDataDictionary.Create;
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FENG:=CreateSQLEngine(AType);
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end;
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Function TGenSQLApplication.CreateSQLEngine(AType : String): TFPDDSQLEngine;
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begin
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Case lowercase(AType) of
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'firebird' : Result:=TFPDDFBSQLEngine.Create;
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else
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Result:=TFPDDSQLEngine.Create;
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end;
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end;
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procedure TGenSQLApplication.DoConvertQuery(Const S,T,KF : String; ST : TSTatementType);
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Var
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Q : TSQLQuery;
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TD : TDDTableDef;
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Fields,KeyFields : TFPDDFieldList;
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I : Integer;
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F : TDDFieldDef;
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FN,SQL : String;
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begin
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TD:=FDD.Tables.AddTable(T);
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Q:=TSQLQuery.Create(Self);
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try
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Q.Database:=FConn;
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Q.Transaction:=FConn.Transaction;
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Q.SQL.Text:=S;
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Q.Open;
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TD.ImportFromDataset(Q);
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finally
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Q.Free;
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end;
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if (KF<>'') then
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begin
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KeyFields:=TFPDDFieldList.Create(False);
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For I:=1 to WordCount(KF,[',']) do
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begin
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FN:=ExtractWord(I,KF,[',']);
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F:=TD.Fields.FieldByName(FN);
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if (F=nil) then
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Writeln('Warning: Field ',FN,' does not exist.')
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else
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KeyFields.Add(F);
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end;
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end;
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Fields:=TFPDDFieldList.CreateFromTableDef(TD);
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try
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FEng.TableDef:=TD;
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Case ST of
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stDDL : SQL:=FEng.CreateCreateSQL(KeyFields);
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stSelect : SQL:=FEng.CreateSelectSQL(Fields,KeyFields);
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stInsert : SQL:=FEng.CreateInsertSQL(Fields);
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stUpdate : SQL:=FEng.CreateUpdateSQL(Fields,KeyFields);
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stDelete : SQL:=FEng.CreateDeleteSQL(KeyFields);
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end;
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Writeln(SQL);
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finally
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KeyFields.Free;
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end;
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end;
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procedure TGenSQLApplication.DoRun;
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var
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ErrorMsg: String;
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S,T,KF : String;
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I : Integer;
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ST : TStatementType;
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begin
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// quick check parameters
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ErrorMsg:=CheckOptions('hc:d:s:t:y:k:u:p:', 'help connection-type: database: sql: table: type: keyfields: user: password:');
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if ErrorMsg<>'' then
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WriteHelp(ErrorMsg);
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if HasOption('h', 'help') then
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WriteHelp('');
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S:=GetOptionValue('c','connection-type');
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T:=GetOptionValue('d','database');
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if (S='') or (t='') then
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Writehelp('Need database and connectiontype');
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ConnectToDatabase(S,T,GetOptionValue('u','user'),GetOptionValue('p','password'));
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S:=GetOptionValue('s','sql');
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T:=GetOptionValue('t','table');
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if (t='') then
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Writehelp('Need table name');
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i:=GetEnumValue(TypeInfo(TStatementType),'st'+GetOptionValue('y','type'));
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if I=-1 then
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Writehelp(Format('Unknown statement type : %s',[GetOptionValue('y','type')]));
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ST:=TStatementType(i);
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KF:=GetOptionValue('k','keyfields');
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if (KF='') and (st in [stselect, stupdate, stdelete]) then
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Writehelp('Need key fields for delete, select and update');
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if (S='') then
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S:='SELECT * FROM '+T+' WHERE 0=1';
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DoConvertQuery(S,T,KF,ST);
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// stop program loop
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Terminate;
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end;
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constructor TGenSQLApplication.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 TGenSQLApplication.Destroy;
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begin
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FreeAndNil(FConn);
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FreeAndNil(FDD);
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FreeAndNil(FENG);
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inherited Destroy;
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end;
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procedure TGenSQLApplication.WriteHelp(Const AMsg : string);
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Var
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S : String;
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L : TStrings;
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begin
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if AMsg<>'' then
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Writeln('Error : ',AMsg);
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Writeln('Usage: ', ExeName, ' [options]');
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Writeln('Where options is one or more of:');
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Writeln('-h --help this help message');
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Writeln('-c --connection-type=ctype Set connection type (required)' );
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Writeln('-d --database=db database connection name (required)');
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Writeln('-s --sql=sql SQL to execute (optional)');
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Writeln('-t --table=tablename tablename to use for statement (required)');
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Writeln('-y --type=stype Statement type (required) one of ddl, select, insert, update, delete)');
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Writeln('-k --keyfields=fields Comma-separated list of key fields (required for delete, update, optional for select,ddl)');
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Writeln('-u --user=username User name to connect to database');
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Writeln('-p --password=password Password of user to connect to database with');
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Writeln('Where ctype is one of : ');
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L:=TStringList.Create;
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try
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GetConnectionList(L);
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for S in L do
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Writeln(' ',lowercase(S));
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finally
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L.Free;
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end;
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Halt(Ord(AMsg<>''));
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end;
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var
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Application: TGenSQLApplication;
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begin
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Application:=TGenSQLApplication.Create(nil);
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Application.Title:='Generate SQL Demo';
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Application.Run;
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Application.Free;
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end.
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