| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Dave Greeko <davegreeko(at)yahoo(dot)com> |
| Cc: | "David G(dot) Johnston" <david(dot)g(dot)johnston(at)gmail(dot)com>, pgsql-general <pgsql-general(at)postgresql(dot)org> |
| Subject: | Re: libpq Prepared Statement with dynamic IN operator |
| Date: | 2020-11-24 21:18:11 |
| Message-ID: | 310537.1606252691@sss.pgh.pa.us |
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| Lists: | pgsql-general |
Dave Greeko <davegreeko(at)yahoo(dot)com> writes:
> I tried both and I am getting syntax error.
> char *query="select codec_id,fs_name,pt from codec_defs where pt = ANY(string_to_array(?, ','))";
> OR
> char *query="select codec_id,fs_name,pt from codec_defs where pt = ANY(?::text)";
> PGresult *res=PQprepare(conn,"codecs",query,1,NULL);
Well, your first problem is that "?" is not the parameter symbol
understood by libpq+backend. Try "$1". The other problem,
at least for the second version of that, is that you want to be
passing a text array not a single text value --- so it needs to
look more like "where pt = ANY($1::text[])".
regards, tom lane
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