Re: Replaceing records

From: Harald Fuchs <nospam(at)sap(dot)com>
To: pgsql-general(at)postgresql(dot)org
Subject: Re: Replaceing records
Date: 2003-09-04 15:22:41
Message-ID: pu8yp4pohq.fsf@srv.protecting.net
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In article <87ekywbqz1(dot)fsf(at)stark(dot)dyndns(dot)tv>,
Greg Stark <gsstark(at)mit(dot)edu> writes:

> Out of curiosity, what does the mysql syntax look like? How would you handle
> something where the insert and update were quite different like:

> INSERT INFO foo (pk,value,count,date_ins) values (?,?,1,now())
> OR UPDATE foo set value=?, count=count+1, date_upd=now() where pk = ?

You can't. The only thing MySQL has to offer is

REPLACE INTO tbl_name [(col_name,...)] VALUES (expr,...)

`REPLACE' works exactly like `INSERT', except that if an old record in
the table has the same value as a new record on a `UNIQUE' index or
`PRIMARY KEY', the old record is deleted before the new record is
inserted.

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