Обсуждение: Drop only temporary table

Durumdara <durumdara@gmail.com> writes:
> As I experienced I can create normal and temp table with same name.

Sure.

> As I see that drop table stmt don't have "temporary" suboption to determine
> which to need to eliminate - the real or the temporary.

Once you've created a temp table, it masks any normal table of the same name
(unless you use a schema-qualified reference to the normal table).

            regards, tom lane

You can use schema name as a prefix:

postgres=# \d+
                       List of relations
  Schema   | Name | Type  |  Owner   |    Size    | Description
-----------+------+-------+----------+------------+-------------
 pg_temp_1 | t    | table | postgres | 8192 bytes |
(1 row)

postgres=# drop table pg_temp_1.t;
DROP TABLE

But generally speaking I suggest you generate random names for
temporary tables.

On Fri, 18 Mar 2016 13:47:06 +0100
Durumdara <durumdara@gmail.com> wrote:

> Dear PG Masters!
>
> As I experienced I can create normal and temp table with same name.
>
> create table x (kod integer);
>
> CREATE TEMPORARY TABLE x (kod integer);
>
> select tablename from pg_tables where schemaname='public'
>  union all
> select c.relname from pg_class c
> join pg_namespace n on n.oid=c.relnamespace
> where
> n.nspname like 'pg_temp%'
> and c.relkind = 'r'
> and pg_table_is_visible(c.oid);
>
> ---
>
> I can see two x tables.
>
> As I see that drop table stmt don't have "temporary" suboption to
> determine which to need to eliminate - the real or the temporary.
>
> Same thing would happen with other DDL/DML stmts - what is the
> destination table - the real or the temporary?
>
> "insert into x(kod) values(1)"
>
> So what do you think about this problem?
>
> I want to avoid to remove any real table on resource closing (=
> dropping of temporary table).
> How to I force "drop only temporary"? Prefix, option, etc.
>
> Thanks for your help!
>
> dd



--
Best regards,
Aleksander Alekseev
http://eax.me/

I want to avoid to remove any real table on resource closing (= dropping of temporary table).

How to I force "drop only temporary"? Prefix, option, etc.