[mailto:bladeofligh...@gmail.com]
Sent: Monday, 15 July 2013 5:26 AM
To: pgsql-general@postgresql.org; Haiming Zhang
Subject: Re: [GENERAL] Update big table
I don't believe you can use JOIN explicitly in this situation because it's an
UPDATE, but I believe you can accomplish the same effect wit
On Mon, Jul 15, 2013 at 6:08 AM, Haiming Zhang wrote:
> I run my query using JOIN for two hours, and did not get it done. Here is
> my query:
>
> update table1 set col1 = true from table2 where table1.event_id =
> table2.event_id
>
Did you already post the query plan from "EXPLAIN update table1
-Original Message-
From: Vincenzo Romano [mailto:vincenzo.rom...@notorand.it]
Sent: Sunday, 14 July 2013 9:03 PM
To: Haiming Zhang
Cc: pgsql-general@postgresql.org
Subject: Re: [GENERAL] Update big table
2013/7/14 Haiming Zhang :
> Hi All,
>
>
>
> I am using postgres 9.1, I
I don't believe you can use JOIN explicitly in this situation because it's
an UPDATE, but I believe you can accomplish the same effect with FROM and
WHERE.
UPDATE table SET column1 = TRUE
FROM table2
WHERE table1.event_id = table2.event_id;
I would make sure there's an index on table2.event_id if
2013/7/14 Haiming Zhang :
> Hi All,
>
>
>
> I am using postgres 9.1, I have a question about updating big table. Here is
> the basic information of this table.
>
> 1. This table has one primary key and other 11 columns.
>
> 2. It also has a trigger that before updat
Hi All,
I am using postgres 9.1, I have a question about updating big table. Here is
the basic information of this table.
1. This table has one primary key and other 11 columns.
2. It also has a trigger that before update records, another
table got updated first.
