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help / color / mirror / Atom feedFrom: Frank Gard <[email protected]>
To: [email protected]
Subject: Re: Append a list of tables to an empty table to form a whole table
Date: Fri, 14 Oct 2022 09:13:05 +0200
Message-ID: <[email protected]> (raw)
In-Reply-To: <CA+i5JwaD2rz-jJdm9_SK=88z=J0SDNmij98hMZxCwLuHxbz2Mw@mail.gmail.com>
References: <CA+i5JwYX9jDXv2fS9u6JP24=xpaTX_r6SXMjUCg5JGwTA2cPog@mail.gmail.com>
<CA+i5JwaD2rz-jJdm9_SK=88z=J0SDNmij98hMZxCwLuHxbz2Mw@mail.gmail.com>
Hi,
again: Use EXECUTE! It's well documented here: https://www.postgresql.org/docs/15/plpgsql-statements.html#PLPGSQL-STATEMENTS-EXECUTING-DYN
In your case, you can simply replace your INSERT statement by the following:
EXECUTE 'insert into em_table as select * from table ' || a_name;
Hope this helps.
Frank.
Am 14.10.22 um 08:00 schrieb Shaozhong SHI:
>
>
> How best to append a list of tables to an empty table to form a whole table?
>
> Pseudo codes show the desirable logic.
>
>
>
> There are a list of tables with exactly same colums
> table_a
> table_b
> table_c
>
> Create an empty table emp_table
>
> Foreach a_name in ARRAY ARRAY['table_a', 'table_b', 'table_c'] loop
> insert into em_table as select * from table a_name
>
> end loop;
>
> Can something like that be done is PostGIS?
>
> Regards,
>
> David
--
Vielen Dank und viele Grüße,
Frank Gard
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