(Sorry I sent this to you twice, Tom. I forgot to CC to the
pgsql-novice list.)
Thanks a lot, Tom.
One follow-up question:
If I want the number of elements in that array to vary with each
execution, then I'd have to use the $1="'{foo,bar}'" method right?
Then, I'd construct that string based on the number of elements I have
for that execution.
Josh
-----Original Message-----
From: Tom Lane [mailto:tgl@sss.pgh.pa.us]
Sent: Monday, June 26, 2006 1:32 PM
To: Garcia, Joshua
Cc: pgsql-novice@postgresql.org
Subject: Re: [NOVICE] Variable array sizes with PQexecParams
"Garcia, Joshua" <Joshua.Garcia@xerox.com> writes:
> I want to use PQexecParams to insert into a field that takes an array
of
> varchars. I tried something like:
> INSERT INTO table1(column1) VALUES ('{$1,$2}')
> But, this just inserts {$1,$2} into the field.
Well, yeah. If it did anything else that'd be a catastrophic bug.
Try something like
INSERT INTO table1(column1) VALUES (ARRAY[$1,$2])
For varchar this will probably work as-is, for other datatypes you might
need to add explicit casts to determine the array element types, eg
INSERT INTO table1(column1) VALUES (ARRAY[$1::integer,$2::integer])
Another possibility is to treat the whole array value as one parameter:
INSERT INTO table1(column1) VALUES ($1)
where the value of $1 is like "{foo,bar}", but this gets into having to
quote the data values correctly to make them valid array elements. The
first way is probably safer.
regards, tom lane
