Of course you can create indexes on temporary tables as well: ([email protected][local]:5439) [postgres] > create temporary table tmp4 ( a int, b varchar ); CREATE TABLE ([email protected][local]:5439) [postgres] > create index tmpi1 on tmp4(a); CREATE INDEX Better don't use temp tables when it is necessary. https://www.postgresql.org/docs/9.5/static/sql-selectinto.html, https://www.postgresql.org/docs/9.5/static/sql-createtable.html, https://www.postgresql.org/docs/9.5/static/plpgsql-statements.html#PLPGSQL-STATEMENTS-SQL-ONEROW, http://www.postgresql.org/mailpref/pgsql-general. DROP. How to Delete PostgreSQL Temporary Table? postgres（9.4）で、selectから一時テーブルを作成し、同じテーブルに「コミットドロップ」を適用しようとしています。以下の構文を使用しています。 CREATE TEMPORARY TABLE t5 ON COMMIT DROP AS select * from test4. I am trying to call 2 custom functions from a third one with: CREATE OR REPLACE FUNCTION play_game( IN in_uid integer, IN in_gid integer, IN in_tiles jsonb, OUT out_gid integer) RETURNS integer AS$func$DECLARE ....BEGIN PERFORM check_positions(in_uid, in_gid, in_tiles); SELECT out_word AS word, max(out_score) AS score INTO TEMP TABLE _words ON COMMIT DROP FROM check_words(in_uid, in_gid, in_tiles) GROUP BY word, gid;...END$func$ LANGUAGE plpgsql; But get the errors (I tried TEMP, TEMPORARY, with and without TABLE): words=> \i play_game.sqlpsql:play_game.sql:166: ERROR: "temp" is not a known variableLINE 29: INTO TEMP TABLE _words ON COMMIT DROP ^, words=> \i play_game.sqlpsql:play_game.sql:166: ERROR: "temporary" is not a known variableLINE 29: INTO TEMPORARY TABLE _words ON COMMIT DROP ^, The doc https://www.postgresql.org/docs/9.5/static/sql-selectinto.html justsays:" read the dochttps://www.postgresql.org/docs/9.5/static/sql-createtable.html ", Copyright © 1996-2020 The PostgreSQL Global Development Group, CAADeyWiFBXbeOEA9HNMCrouqJ6FEw5Aph8=o3HWRYSw41WMqJw@mail.gmail.com, https://www.postgresql.org/docs/9.5/static/sql-selectinto.html, https://www.postgresql.org/docs/9.5/static/sql-createtable.html, Re: SELECT col INTO TEMP TABLE tab2 ON COMMIT DROP FROM tab1, Re: Postgres Pain Points 2 ruby / node language drivers, Alexander Farber , pgsql-general , SELECT col INTO TEMP TABLE tab2 ON COMMIT DROP FROM tab1. More often pattern is create first and delete repeatedly. As we can see in the below outcome that the schema of the fruits temporary table is pg_temp_3. TRUNCATE -- empty a table or set of tables, but leaves its structure for future data. The temporary table will be dropped at the end of the current transaction block. Better don't use temp tables when it is necessary. TABLESPACE tablespace_name. The following are nonstandard extensions: The temporary tables are a useful concept present in most SGBDs, even though they often work differently. Temporary tables are automatically dropped at the end of a session, or optionally at the end of the current transaction (see ON COMMIT below). CREATE TEMPORARY TABLE … By default, a temporary table will live as long as your database connection. Quick Example: -- Create a temporary table CREATE TEMPORARY TABLE temp_location ( city VARCHAR ( 80 ) , street VARCHAR ( 80 ) ) ON COMMIT DELETE ROWS; In order to drop a temporary table, we use the DROP TABLE statement as follows. CREATE TABLE AS conforms to the SQL standard. Differences between Temporary Tables in PostgreSQL and Oracle : PostgreSQL: Oracle: Comment: Syntax: ... Oracle doesn't support ON COMMIT DROP. Temporary tables are automatically dropped at the end of a session, or optionally at the end of the current transaction. I need to create temporary table with data which is dropped at end of transaction. A lock is very useful and important in PostgreSQL to prevent the user for modifying a single row or all tables. More often pattern is create first and delete repeatedly. DROP TABLE -- remove/deletes a table. Essentially, an automatic TRUNCATE is done at each commit. Visibility: Both table definition and data are visible to the current session: The data in temporary table is private to each session. The temporary table is almost double as fast to write to than the normal table. Re: [HACKERS] temporary table vs array performance at 2016-09-26 15:49:42 from David G. Johnston Re: [HACKERS] temporary table vs array performance at 2016-09-26 16:16:31 from Pavel Stehule Browse pgsql-general by date Temporary tables are automatically dropped at the end of a session, or optionally at the end of the current transaction (see ON COMMIT below). CREATE TEMP TABLE films_recent ON COMMIT DROP AS EXECUTE recentfilms('2002-01-01'); Compatibility. メッセージが表示されます Emmanuel Cecchet wrote: > Instead of relying on a boolean that tells if a temp table was accessed, > I keep a list of the Oid for the temp tables accessed in the transaction > and at prepare commit time, I check if the relations are still valid. However, there is more to temporary tables than meets the eye. 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