Firebird Reihenfolge der Tabellen bei Insert mit Foreignkey

[Fritzew]

Auf Basis von Firedac:

hatte ich mal für ein ähnliches InHouse Problem bei uns so gelöst:

Delphi-Quellcode:

procedure TdbMoveOld.Execute_copy_Work;
var
  lTables: Tstringlist;
  lTablesnoReference: Tstringlist;
  lTablesWithReference: Tstringlist;
  lTablesDummy: Tstringlist;
  lTablename: string;
  lfkey: string;

  lFinishedTables: Tstringlist;
  aindex: integer;

  function getIndexforinsert: integer;
  var
    dummy: Tstringlist;
    i, temp: integer;
    s: string;
    found: boolean;
  begin
    result := -1;
    for i := 0 to lTablesWithReference.count - 1 do
    begin
      dummy := pointer(lTablesWithReference.Objects[i]);

      if dummy <> nil then
      begin
        found := true;
        for s in dummy do
          if not lFinishedTables.find(s, temp) then
          begin
            found := false;
          end;
        if found then
          exit(i);
      end;

    end;
  end;

begin
  lTables := Tstringlist.create;
  lTablesnoReference := Tstringlist.create;
  lTablesWithReference := Tstringlist.create;
  lFinishedTables := Tstringlist.create;
  lFinishedTables.Sorted := true;

  try
    // Get All Tables
    FileDestConnection.GetTableNames('', '', '', lTables, [osMy], [tkTable]);

    for lTablename in lTables do
    begin
      // CwLogSave.send(lTablename);
      metaQuery.MetaInfoKind := mkForeignKeys;
      metaQuery.ObjectName := lTablename;
      metaQuery.Open;
      if metaQuery.RecordCount > 0 then
      begin
        lTablesDummy := Tstringlist.create;
        lTablesDummy.Sorted := true;
        lTables.Duplicates := dupIgnore;

        while not metaQuery.eof do
        begin
          lfkey := metaQuery.FieldValues['PKEY_TABLE_NAME'];
          if lfkey <> lTablename then
            lTablesDummy.add(lfkey);
          metaQuery.Next;
        end;
        lTablesWithReference.AddObject(lTablename, lTablesDummy);
      end
      else
      begin
        // There is no reference so put in in the list
        lTablesnoReference.add(lTablename);
      end;
      metaQuery.Close;
    end;

    // Now try the loop


    // First all Tables without any references
    for lTablename in lTablesnoReference do
    begin
      lFinishedTables.add(lTablename);
      CopyData(lTablename); // Die must Du Dir selber bauen
    end;

    while lTablesWithReference.count > 0 do
    begin
      aindex := getIndexforinsert;
      if aindex > -1 then
      begin
        // CwLogSave.send('Insert now ' + lTablesWithReference[aindex]);
        lFinishedTables.add(lTablesWithReference[aindex]);
        if (lTablesWithReference.Objects[aindex] <> nil) then
          Tstringlist(lTablesWithReference.Objects[aindex]).free;
        lTablename := lTablesWithReference[aindex];
        lTablesWithReference.delete(aindex);

        CopyData(lTablename); // Die must Du Dir selber bauen

      end
      else
        break; // Ther is a error
    end;

    if lTablesWithReference.count > 0 then
    begin
      CwLogSave.senderror('Not all found');

      CwLogSave.entermethod('Tables with references');
      for lTablename in lTablesWithReference do
        CwLogSave.send(lTablename);
      CwLogSave.ExitMethod('Tables with references');
    end;

  finally
    lTables.free;
    lTablesnoReference.free;
    lTablesWithReference.free;
    lFinishedTables.free;
  end;

end;

Fritz