Обсуждение: PHP and COPY
Does anyone know how to execute a COPY from PHP? I keep getting parse errors on all the data. PHP 4.3.2 PostgreSQL 7.3.4 example: CREATE table tmp(data text); COPY tmp FROM STDIN; test1 test2 test3 \.
such as? To answer your question. I have a order system on my local Postgres (for multiple clients 50+), and need to have an offsite independent database to drive orders for a website (for one client). None of the replication solutions I have seen (at a resonable price) allow me to limit the data being replicated by a specific field (which I must do from a liability standpoint), so I'm rolling my own replication using php as the scripting language. I've got the data being transferred using inserts just fine, but I would suspect a 50-300% improvement in transfer speed if I could resort to COPY instead (I'm inserting records in transactions of 500 rows each for testing). One of the tables that I need to replicate is a Multi-Gig table (which is about the same size as all the others combined). Joshua D. Drake wrote: > Hello, > > Why in the world would you want to do this? It seems that there > should be a better way. > > Sincerely, > > Joshua Drake > > DeJuan Jackson wrote: > >> Does anyone know how to execute a COPY from PHP? >> I keep getting parse errors on all the data. >> >> PHP 4.3.2 >> PostgreSQL 7.3.4 >> >> example: >> >> CREATE table tmp(data text); >> >> COPY tmp FROM STDIN; >> test1 >> test2 >> test3 >> \. >> >> >> >> ---------------------------(end of broadcast)--------------------------- >> TIP 7: don't forget to increase your free space map settings > > >
> To answer your question. I have a order system on my local Postgres (for multiple clients 50+), and need to have an offsite independent database to drive orders for a website (for one client). > None of the replication solutions I have seen (at a resonable price) > allow me to limit the data being replicated by a specific field (which > I must do from a liability standpoint), so I'm rolling my own > replication using php as the scripting language. I've got the data > being transferred using inserts just fine, but I would suspect a > 50-300% improvement in transfer speed if I could resort to COPY > instead (I'm inserting records in transactions of 500 rows each for > testing). One of the tables that I need to replicate is a You would definatley see an improvement from using COPY but you could have other problems. COPY does not happen within a transaction block it just kind of shoves everything in there. You are going to be better served in the long run doing inserts. Sincerely, Joshua Drake > Multi-Gig table (which is about the same size as all the others > combined). > > Joshua D. Drake wrote: > >> Hello, >> >> Why in the world would you want to do this? It seems that there >> should be a better way. >> >> Sincerely, >> >> Joshua Drake >> >> DeJuan Jackson wrote: >> >>> Does anyone know how to execute a COPY from PHP? >>> I keep getting parse errors on all the data. >>> >>> PHP 4.3.2 >>> PostgreSQL 7.3.4 >>> >>> example: >>> >>> CREATE table tmp(data text); >>> >>> COPY tmp FROM STDIN; >>> test1 >>> test2 >>> test3 >>> \. >>> >>> >>> >>> ---------------------------(end of >>> broadcast)--------------------------- >>> TIP 7: don't forget to increase your free space map settings >> >> >> >> >
Not really, if I was using COPY I wouldn't need the transaction. The reason I use the transaction is to make the inserts faster, not for any integrity issues. Joshua D. Drake wrote: > > To answer your question. I have a order system on my local Postgres > (for multiple clients 50+), and need to have an offsite independent > database to drive orders for a website (for one client). > >> None of the replication solutions I have seen (at a resonable price) >> allow me to limit the data being replicated by a specific field >> (which I must do from a liability standpoint), so I'm rolling my own >> replication using php as the scripting language. I've got the data >> being transferred using inserts just fine, but I would suspect a >> 50-300% improvement in transfer speed if I could resort to COPY >> instead (I'm inserting records in transactions of 500 rows each for >> testing). One of the tables that I need to replicate is a > > > > You would definatley see an improvement from using COPY but you could > have other problems. COPY does not happen within a transaction block > it just kind of shoves everything in there. You are going to be better > served in > the long run doing inserts. > > Sincerely, > > > Joshua Drake > > > >> Multi-Gig table (which is about the same size as all the others >> combined). >> >> Joshua D. Drake wrote: >> >>> Hello, >>> >>> Why in the world would you want to do this? It seems that there >>> should be a better way. >>> >>> Sincerely, >>> >>> Joshua Drake >>> >>> DeJuan Jackson wrote: >>> >>>> Does anyone know how to execute a COPY from PHP? >>>> I keep getting parse errors on all the data. >>>> >>>> PHP 4.3.2 >>>> PostgreSQL 7.3.4 >>>> >>>> example: >>>> >>>> CREATE table tmp(data text); >>>> >>>> COPY tmp FROM STDIN; >>>> test1 >>>> test2 >>>> test3 >>>> \. >>>> >>>> >>>> >>>> ---------------------------(end of >>>> broadcast)--------------------------- >>>> TIP 7: don't forget to increase your free space map settings >>> >>> >>> >>> >>> >> >
Try something along these lines..... (this snippet is untested but should
get you started)
$dbh = pg_connect($connstr);
$sql = "COPY table (field1, field2, field3) from stdin;";
$result = pg_query($dbh, $sql);
$data = "blah\tblah\tblah\n";
$stat = pg_put_line($dbh, $data);
if(!$stat)
{
echo "copy failed: ".pg_errormessage($dbh)."<br>\n";
}
pg_put_line($dbh, "\\.\n");
pg_end_copy($dbh);
> Does anyone know how to execute a COPY from PHP?
> I keep getting parse errors on all the data.
>
> PHP 4.3.2
> PostgreSQL 7.3.4
>
> example:
>
> CREATE table tmp(data text);
>
> COPY tmp FROM STDIN;
> test1
> test2
> test3
> \.
>
>
>
> ---------------------------(end of broadcast)---------------------------
> TIP 7: don't forget to increase your free space map settings