FDQuery追加给出错误“没有这样的表”

Question

In Delphi 10.1 I made a small program to learn about FireDAC and SQlite.

I have FDConnection , FDQuery (with SQL= SELECT * FROM Sætning ) and DataSource + DBGrid . The DBGrid shows the (empty) table Sætning . I want to put data into my table from a listbox containg a CSV.

This is my code: ( fdwSætning = an FDQuery )

procedure TMainForm.bCSV_SQLite_SætningClick(Sender: TObject);
var
  loop : integer;
  nr, lang, tekst : string;
begin
  { Read CSV file into Listbox }
  Listbox1.Items.LoadFromFile('GMS_Saetninger.txt');
  { Put the values from the CSV into the fields in each record }
  for loop:= 0 to Listbox1.Items.Count-1 do begin
    fdqSætning.Edit;
    nr:= copy(Listbox1.Items[loop],1,4);
    lang:= copy(Listbox1.Items[loop],5,2);
    tekst:= copy(Listbox1.Items[loop],8, length(Listbox1.Items[loop]));
    fdqSætning.Append;
    fdqSætning.FieldByName('SAETNING_ID').AsString:= nr;
    fdqSætning.FieldByName('LANGUAGE').AsString:= lang;
    fdqSætning.FieldByName('SENTENCE').AsString:= tekst;
    fdqSætning.Post;
  end;
end; 

When I run this code I get the error message

[FireDAC][phys][SQLite]ERROR:no such table: Sætning

Answer 1

That should not happen. Since Delphi 2009, FireDAC fully supports Unicode metadata values , so as does SQLite DBMS . Possible explanation for what you describe is that you've created your table in some external tool (which cannot save Unicode metadata).

So even when I would highly suggest using only ASCII chars for database object names, you can still do something like this with FireDAC since Delphi 2009:

FDConnection.Params.Add('DriverID=SQLite');
FDConnection.Params.Add('Database=C:\MyDatabase.db');

FDQuery.SQL.Text := 'CREATE TABLE ṀÿṪäḅḷë (MɏFɨɇłđ INTEGER)';
FDQuery.ExecSQL;
FDQuery.SQL.Text := 'INSERT INTO ṀÿṪäḅḷë (MɏFɨɇłđ) VALUES (1234)';
FDQuery.ExecSQL;
FDQuery.SQL.Text := 'SELECT MɏFɨɇłđ FROM ṀÿṪäḅḷë';
FDQuery.Open;
Assert(FDQuery.FieldByName('MɏFɨɇłđ').AsInteger = 1234);