From: | Atri Sharma <atri(dot)jiit(at)gmail(dot)com> |
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To: | Pg Hackers <pgsql-hackers(at)postgresql(dot)org> |
Subject: | Support UPDATE table SET(*)=... |
Date: | 2014-10-15 08:02:56 |
Message-ID: | CAOeZVif44gNx-uqE=qNm5FDu+LfSjK94jSm1goHMH2Fc3u1FpQ@mail.gmail.com |
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Lists: | pgsql-hackers |
Hi All,
Please find attached a patch which implements support for UPDATE table1
SET(*)=...
The patch supports both UPDATE table SET(*)=(a,b,c) and UPDATE table1
SET(*)=(SELECT a,b,c FROM...).
It solves the problem of doing UPDATE from a record variable of the same
type as the table e.g. update foo set (*) = (select foorec.*) where ...;
The design is simple. It basically expands the * in transformation stage,
does the necessary type checking and adds it to the parse tree. This allows
for normal execution for the rest of the stages.
Thoughts/Comments?
Regards,
Atri
Attachment | Content-Type | Size |
---|---|---|
updatestar_ver1.patch | application/x-download | 11.4 KB |
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