Re: Re: is PG able to handle a >500 GB Database?

Florent Guillaume wrote:
  >> Unless your application logic tries to use OIDs as row identifiers,
  >> duplicate OIDs in user tables are not a problem.
  >
  >Hmmm, that means that the following, which I use, is not strictly correct :
  >
  >create table t1 (recordid SERIAL PRIMARY KEY, val INT4, name TEXT);
  >... much later ...
  >insert into t1 (val, name) values (3465, 'blah');
  >-- PHP application gets $lastoid for this insert
  >select recordid from t1 where oid = $lastoid;
  >-- PHP application now hast the recordid that was created.
  >
  >Because the last select could return several lines.
  >
  >What would be the correct idiom ? Explicitly use nextval ? That pretty
  >defeats the point of SERIAL, no ?

SELECT currval('t1_recordid_seq');

currval is guaranteed to return the value that the sequence has just put
into recordid.

--
Oliver Elphick                                Oliver.Elphick@lfix.co.uk
Isle of Wight                              http://www.lfix.co.uk/oliver
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