Re: libpq, PQExecParams and the inserting of binary data

    David Hinkle wrote:

> I will try this.  Out of curiosity, where does the value of 17 for the
> OID field come from?

From the pg_type table:

template1=# select oid from pg_type where typname='bytea';oid 
----- 17
(1 row)

Alternatively, there's the server/catalog/pg_type.h include file
which has #defines for built-in datatypes:

$ grep BYTEA server/catalog/pg_type.h
#define BYTEAOID                17

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