Unidac / MyDac / SQL - 我在快速插入大约 1000 行时遇到问题

Question

I use unidac components. And i have problem with fast insert about 1000 rows.

var
  query: TUniquery;
begin
  query.SQL.Add('INSERT INTO Table (field1,field2,field3) VALUES (:b0,:b1,:b2);');
  for I := 0 to 1000 do
  begin
   Query.ParamByName('b0').AsInteger := 1;  
   Query.ParamByName('b1').AsInteger := 2;
   Query.ParamByName('b2').AsInteger := Random(100);
   Query.Prepare;
   Query.Execute;  //1000 times is very slow
end;

It is faster

var
  query: TUniquery;
begin
  for I := 0 to 1000 do
    Query.SQL.Add('INSERT INTO Table (field1,field2,field3) VALUES (1,2,Random(100));');
  end;
  Query.Execute;  //1 times - is fast add 
end;

But, I would like to use the first format with the procedure Query.ParamByName('b1').AsInteger:= 2; because it is clearer and with a large number of columns I find myself easier to find.

Do you have any ideas on how to solve this?

Maybe you have some other ways to quickly insert a large number of rows with different data?

Answer 1

If you need to quickly insert a large number of records, you should use batch updates. You can read more about batch inserting into MySQL using UniDAC (or MyDAC) in their blog