Re: Append a list of tables to an empty table to form a whole table

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
Zum Brünnchen 27
D-66583 Spiesen-Elversberg
Tel. : +49(6821)790880
E-Mail:frank(at)familie-gard(dot)de

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