Denis BUCHER wrote:
Hello,
I have a system that must each day import lots of data from another one.
Our system is in postgresql and we connect to the other via ODBC.
Currently we do something like :
SELECT ... FROM ODBC source
foreach row {
INSERT INTO postgresql
}
The problem is that this method is very slow...
Does someone has a better suggestion ?
Thanks a lot in advance !
Denis
If you can prepare your statement it would run a lot faster, no idea if
odbc supports such things though.
so:
select ... from odbc...;
$q = prepare('insert into pg...')
foreach row {
$q.params[0] = ..
$q.params[1] = ..
$q.execute;
}
commit;
(* if possible, make sure you are not commitiing each insert statement,
do them all the commit once at the end *)
If you cant prepare, you should try to build multi-value insert statements:
insert into pgtable (col1, col2, col3) values ('a', 'b', 'c'), ('d',
'e', 'f'), ('g','h','i'),...;
Or, you could look into dblink, dunno if it would be faster.
-Andy
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