mirror of
https://gitlab.com/freepascal.org/fpc/source.git
synced 2025-08-17 16:09:17 +02:00
* 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
|
|||||||
packages/fcl-db/Makefile svneol=native#text/plain
|
packages/fcl-db/Makefile svneol=native#text/plain
|
||||||
packages/fcl-db/Makefile.fpc svneol=native#text/plain
|
packages/fcl-db/Makefile.fpc svneol=native#text/plain
|
||||||
packages/fcl-db/Makefile.fpc.fpcmake svneol=native#text/plain
|
packages/fcl-db/Makefile.fpc.fpcmake svneol=native#text/plain
|
||||||
|
packages/fcl-db/examples/createsql.lpi svneol=native#text/plain
|
||||||
|
packages/fcl-db/examples/createsql.pas svneol=native#text/plain
|
||||||
packages/fcl-db/examples/dbftool.lpi svneol=native#text/plain
|
packages/fcl-db/examples/dbftool.lpi svneol=native#text/plain
|
||||||
packages/fcl-db/examples/dbftool.lpr svneol=native#text/plain
|
packages/fcl-db/examples/dbftool.lpr svneol=native#text/plain
|
||||||
packages/fcl-db/examples/fbadmindemo.pp svneol=native#text/plain
|
packages/fcl-db/examples/fbadmindemo.pp svneol=native#text/plain
|
||||||
|
|||||||
63
packages/fcl-db/examples/createsql.lpi
Normal file
63
packages/fcl-db/examples/createsql.lpi
Normal file
@ -0,0 +1,63 @@
|
|||||||
|
<?xml version="1.0" encoding="UTF-8"?>
|
||||||
|
<CONFIG>
|
||||||
|
<ProjectOptions>
|
||||||
|
<Version Value="9"/>
|
||||||
|
<General>
|
||||||
|
<Flags>
|
||||||
|
<MainUnitHasCreateFormStatements Value="False"/>
|
||||||
|
</Flags>
|
||||||
|
<SessionStorage Value="InProjectDir"/>
|
||||||
|
<MainUnit Value="0"/>
|
||||||
|
<Title Value="Generate SQL Demo"/>
|
||||||
|
<UseAppBundle Value="False"/>
|
||||||
|
<ResourceType Value="res"/>
|
||||||
|
</General>
|
||||||
|
<i18n>
|
||||||
|
<EnableI18N LFM="False"/>
|
||||||
|
</i18n>
|
||||||
|
<VersionInfo>
|
||||||
|
<StringTable ProductVersion=""/>
|
||||||
|
</VersionInfo>
|
||||||
|
<BuildModes Count="1">
|
||||||
|
<Item1 Name="Default" Default="True"/>
|
||||||
|
</BuildModes>
|
||||||
|
<PublishOptions>
|
||||||
|
<Version Value="2"/>
|
||||||
|
</PublishOptions>
|
||||||
|
<RunParams>
|
||||||
|
<local>
|
||||||
|
<FormatVersion Value="1"/>
|
||||||
|
</local>
|
||||||
|
</RunParams>
|
||||||
|
<Units Count="1">
|
||||||
|
<Unit0>
|
||||||
|
<Filename Value="createsql.pas"/>
|
||||||
|
<IsPartOfProject Value="True"/>
|
||||||
|
</Unit0>
|
||||||
|
</Units>
|
||||||
|
</ProjectOptions>
|
||||||
|
<CompilerOptions>
|
||||||
|
<Version Value="11"/>
|
||||||
|
<SearchPaths>
|
||||||
|
<IncludeFiles Value="$(ProjOutDir)"/>
|
||||||
|
</SearchPaths>
|
||||||
|
<Parsing>
|
||||||
|
<SyntaxOptions>
|
||||||
|
<UseAnsiStrings Value="False"/>
|
||||||
|
</SyntaxOptions>
|
||||||
|
</Parsing>
|
||||||
|
</CompilerOptions>
|
||||||
|
<Debugging>
|
||||||
|
<Exceptions Count="3">
|
||||||
|
<Item1>
|
||||||
|
<Name Value="EAbort"/>
|
||||||
|
</Item1>
|
||||||
|
<Item2>
|
||||||
|
<Name Value="ECodetoolError"/>
|
||||||
|
</Item2>
|
||||||
|
<Item3>
|
||||||
|
<Name Value="EFOpenError"/>
|
||||||
|
</Item3>
|
||||||
|
</Exceptions>
|
||||||
|
</Debugging>
|
||||||
|
</CONFIG>
|
||||||
203
packages/fcl-db/examples/createsql.pas
Normal file
203
packages/fcl-db/examples/createsql.pas
Normal file
@ -0,0 +1,203 @@
|
|||||||
|
program createsql;
|
||||||
|
|
||||||
|
{$mode objfpc}{$H+}
|
||||||
|
|
||||||
|
uses
|
||||||
|
{$IFDEF UNIX}{$IFDEF UseCThreads}
|
||||||
|
cthreads,
|
||||||
|
{$ENDIF}{$ENDIF}
|
||||||
|
typinfo, Classes, SysUtils, CustApp, db, sqldb, fpdatadict,
|
||||||
|
fpddfb,fpddpq,fpddOracle,fpddsqlite3,fpddmysql40,fpddmysql41,fpddmysql50, fpddodbc,
|
||||||
|
strutils;
|
||||||
|
|
||||||
|
|
||||||
|
type
|
||||||
|
|
||||||
|
{ TGenSQLApplication }
|
||||||
|
|
||||||
|
TGenSQLApplication = class(TCustomApplication)
|
||||||
|
private
|
||||||
|
function CreateSQLEngine(AType: String): TFPDDSQLEngine;
|
||||||
|
procedure ConnectToDatabase(const AType, ADatabaseName,AUserName,APassword: String);
|
||||||
|
procedure DoConvertQuery(const S, T, KF: String; ST: TSTatementType);
|
||||||
|
protected
|
||||||
|
FConn : TSQLConnector;
|
||||||
|
FDD : TFPDataDictionary;
|
||||||
|
FENG : TFPDDSQLEngine;
|
||||||
|
procedure DoRun; override;
|
||||||
|
public
|
||||||
|
constructor Create(TheOwner: TComponent); override;
|
||||||
|
destructor Destroy; override;
|
||||||
|
procedure WriteHelp(Const AMsg : string); virtual;
|
||||||
|
end;
|
||||||
|
|
||||||
|
{ TGenSQLApplication }
|
||||||
|
|
||||||
|
procedure TGenSQLApplication.ConnectToDatabase(Const AType,ADatabaseName,AUSerName,APassword : String);
|
||||||
|
begin
|
||||||
|
FConn:=TSQLConnector.Create(Self);
|
||||||
|
FConn.ConnectorType:=AType;
|
||||||
|
FConn.DatabaseName:=ADatabaseName;
|
||||||
|
FConn.UserName:=AUserName;
|
||||||
|
FConn.Password:=APassword;
|
||||||
|
FConn.Transaction:=TSQLTransaction.Create(Self);
|
||||||
|
FConn.Connected:=True;
|
||||||
|
FDD:=TFPDataDictionary.Create;
|
||||||
|
FENG:=CreateSQLEngine(AType);
|
||||||
|
end;
|
||||||
|
|
||||||
|
Function TGenSQLApplication.CreateSQLEngine(AType : String): TFPDDSQLEngine;
|
||||||
|
|
||||||
|
begin
|
||||||
|
Case lowercase(AType) of
|
||||||
|
'firebird' : Result:=TFPDDFBSQLEngine.Create;
|
||||||
|
else
|
||||||
|
Result:=TFPDDSQLEngine.Create;
|
||||||
|
end;
|
||||||
|
end;
|
||||||
|
|
||||||
|
procedure TGenSQLApplication.DoConvertQuery(Const S,T,KF : String; ST : TSTatementType);
|
||||||
|
|
||||||
|
Var
|
||||||
|
Q : TSQLQuery;
|
||||||
|
TD : TDDTableDef;
|
||||||
|
Fields,KeyFields : TFPDDFieldList;
|
||||||
|
I : Integer;
|
||||||
|
F : TDDFieldDef;
|
||||||
|
FN,SQL : String;
|
||||||
|
|
||||||
|
begin
|
||||||
|
TD:=FDD.Tables.AddTable(T);
|
||||||
|
Q:=TSQLQuery.Create(Self);
|
||||||
|
try
|
||||||
|
Q.Database:=FConn;
|
||||||
|
Q.Transaction:=FConn.Transaction;
|
||||||
|
Q.SQL.Text:=S;
|
||||||
|
Q.Open;
|
||||||
|
TD.ImportFromDataset(Q);
|
||||||
|
finally
|
||||||
|
Q.Free;
|
||||||
|
end;
|
||||||
|
if (KF<>'') then
|
||||||
|
begin
|
||||||
|
KeyFields:=TFPDDFieldList.Create(False);
|
||||||
|
For I:=1 to WordCount(KF,[',']) do
|
||||||
|
begin
|
||||||
|
FN:=ExtractWord(I,KF,[',']);
|
||||||
|
F:=TD.Fields.FieldByName(FN);
|
||||||
|
if (F=nil) then
|
||||||
|
Writeln('Warning: Field ',FN,' does not exist.')
|
||||||
|
else
|
||||||
|
KeyFields.Add(F);
|
||||||
|
end;
|
||||||
|
end;
|
||||||
|
Fields:=TFPDDFieldList.CreateFromTableDef(TD);
|
||||||
|
try
|
||||||
|
FEng.TableDef:=TD;
|
||||||
|
Case ST of
|
||||||
|
stDDL : SQL:=FEng.CreateCreateSQL(KeyFields);
|
||||||
|
stSelect : SQL:=FEng.CreateSelectSQL(Fields,KeyFields);
|
||||||
|
stInsert : SQL:=FEng.CreateInsertSQL(Fields);
|
||||||
|
stUpdate : SQL:=FEng.CreateUpdateSQL(Fields,KeyFields);
|
||||||
|
stDelete : SQL:=FEng.CreateDeleteSQL(KeyFields);
|
||||||
|
end;
|
||||||
|
Writeln(SQL);
|
||||||
|
finally
|
||||||
|
KeyFields.Free;
|
||||||
|
end;
|
||||||
|
end;
|
||||||
|
procedure TGenSQLApplication.DoRun;
|
||||||
|
|
||||||
|
var
|
||||||
|
ErrorMsg: String;
|
||||||
|
S,T,KF : String;
|
||||||
|
I : Integer;
|
||||||
|
ST : TStatementType;
|
||||||
|
|
||||||
|
begin
|
||||||
|
|
||||||
|
// quick check parameters
|
||||||
|
ErrorMsg:=CheckOptions('hc:d:s:t:y:k:u:p:', 'help connection-type: database: sql: table: type: keyfields: user: password:');
|
||||||
|
if ErrorMsg<>'' then
|
||||||
|
WriteHelp(ErrorMsg);
|
||||||
|
if HasOption('h', 'help') then
|
||||||
|
WriteHelp('');
|
||||||
|
S:=GetOptionValue('c','connection-type');
|
||||||
|
T:=GetOptionValue('d','database');
|
||||||
|
if (S='') or (t='') then
|
||||||
|
Writehelp('Need database and connectiontype');
|
||||||
|
ConnectToDatabase(S,T,GetOptionValue('u','user'),GetOptionValue('p','password'));
|
||||||
|
S:=GetOptionValue('s','sql');
|
||||||
|
T:=GetOptionValue('t','table');
|
||||||
|
if (t='') then
|
||||||
|
Writehelp('Need table name');
|
||||||
|
i:=GetEnumValue(TypeInfo(TStatementType),'st'+GetOptionValue('y','type'));
|
||||||
|
if I=-1 then
|
||||||
|
Writehelp(Format('Unknown statement type : %s',[GetOptionValue('y','type')]));
|
||||||
|
ST:=TStatementType(i);
|
||||||
|
KF:=GetOptionValue('k','keyfields');
|
||||||
|
if (KF='') and (st in [stselect, stupdate, stdelete]) then
|
||||||
|
Writehelp('Need key fields for delete, select and update');
|
||||||
|
if (S='') then
|
||||||
|
S:='SELECT * FROM '+T+' WHERE 0=1';
|
||||||
|
DoConvertQuery(S,T,KF,ST);
|
||||||
|
// stop program loop
|
||||||
|
Terminate;
|
||||||
|
end;
|
||||||
|
|
||||||
|
constructor TGenSQLApplication.Create(TheOwner: TComponent);
|
||||||
|
begin
|
||||||
|
inherited Create(TheOwner);
|
||||||
|
StopOnException:=True;
|
||||||
|
end;
|
||||||
|
|
||||||
|
destructor TGenSQLApplication.Destroy;
|
||||||
|
begin
|
||||||
|
FreeAndNil(FConn);
|
||||||
|
FreeAndNil(FDD);
|
||||||
|
FreeAndNil(FENG);
|
||||||
|
inherited Destroy;
|
||||||
|
end;
|
||||||
|
|
||||||
|
procedure TGenSQLApplication.WriteHelp(Const AMsg : string);
|
||||||
|
|
||||||
|
Var
|
||||||
|
S : String;
|
||||||
|
L : TStrings;
|
||||||
|
begin
|
||||||
|
if AMsg<>'' then
|
||||||
|
Writeln('Error : ',AMsg);
|
||||||
|
Writeln('Usage: ', ExeName, ' [options]');
|
||||||
|
Writeln('Where options is one or more of:');
|
||||||
|
Writeln('-h --help this help message');
|
||||||
|
Writeln('-c --connection-type=ctype Set connection type (required)' );
|
||||||
|
Writeln('-d --database=db database connection name (required)');
|
||||||
|
Writeln('-s --sql=sql SQL to execute (optional)');
|
||||||
|
Writeln('-t --table=tablename tablename to use for statement (required)');
|
||||||
|
Writeln('-y --type=stype Statement type (required) one of ddl, select, insert, update, delete)');
|
||||||
|
Writeln('-k --keyfields=fields Comma-separated list of key fields (required for delete, update, optional for select,ddl)');
|
||||||
|
Writeln('-u --user=username User name to connect to database');
|
||||||
|
Writeln('-p --password=password Password of user to connect to database with');
|
||||||
|
Writeln('Where ctype is one of : ');
|
||||||
|
L:=TStringList.Create;
|
||||||
|
try
|
||||||
|
GetConnectionList(L);
|
||||||
|
for S in L do
|
||||||
|
Writeln(' ',lowercase(S));
|
||||||
|
|
||||||
|
finally
|
||||||
|
L.Free;
|
||||||
|
end;
|
||||||
|
|
||||||
|
Halt(Ord(AMsg<>''));
|
||||||
|
end;
|
||||||
|
|
||||||
|
var
|
||||||
|
Application: TGenSQLApplication;
|
||||||
|
begin
|
||||||
|
Application:=TGenSQLApplication.Create(nil);
|
||||||
|
Application.Title:='Generate SQL Demo';
|
||||||
|
Application.Run;
|
||||||
|
Application.Free;
|
||||||
|
end.
|
||||||
|
|
||||||
Loading…
Reference in New Issue
Block a user