While testing this load, got to know about one more option which is the UNLOGGED Table of PostgreSQL. By the way, “ALTER TABLE tbl SET UNLOGGED” is supported by postgres. TEMPORARY or TEMP. To create a new table with the structure and data derived from a result set, you specify the new table name after the INTO keyword.. Any indexes created on a temporary table are automatically temporary as well. Unlogged tables are a somewhat related feature of PostgreSQL … So this command becomes slow if the table the command is applied to contains a lot of data. A TRIGGER on view that will help in redirecting the INSERT on the view to the backend Local temporary table (LTT). The TEMP or TEMPORARY keyword is optional; it allows you to create a temporary table instead.. Based on the above, let's look at an example of how DBAs and Developers can create a Global Temporary Table in EDB Postgres. (This isn’t written in the manual.) The UNLOGGED keyword if available will make the new table as an unlogged table.. They can also be used for temporary tables which are recreated even if they are wiped out. Important notice: The UNLOGGED Table is not a safe because it is not written to the write-ahead log, so it is not crash safe. 一.temporary|temp table. Existing permanent tables with the same name are not visible to the current session while the temporary table exists, unless they are referenced with schema-qualified names. CREATE TEMPORARY TABLE statement creates a temporary table that is automatically dropped at the end of a session, or the current transaction (ON COMMIT DROP option). postgresql----temporary table和unlogged table. EDIT: I am leaving the original accepted answer as it is, but please note that the edit below, as suggested by a_horse_with_no_name, is the preferred method for creating a temporary table using VALUES. PostgreSQL Temporary Table. Temporary tables are automatically dropped at the end of a session, or optionally at the end of the current transaction (see ON COMMIT below). If specified, the table is created as a temporary table. You may think it’s OK to change LOGGED table to UNLOGGED table by this command. We can create unlogged tables as follows. But, it copies the whole relation once actually. Create a normal table test and an unlogged table test to … 3. In this section, we are going to understand the working of PostgreSQL temporary table and how to create and remove it.. How to Create a PostgreSQL temporary table. [email protected]/tmp:prathamesh> create unlogged table users (name varchar, email varchar); CREATE TABLE Time: 0.031s Unlogged tables and Rails. Quick Example: -- Create a temporary table CREATE TEMPORARY TABLE temp_location ( city VARCHAR(80), street VARCHAR(80) ) ON COMMIT DELETE ROWS; I was tested write speed to temporary and unlogged tables and noticed that unlogged tables was a much faster Postgres 9.2.2 Write speed Temporary 14.5k/s UNLOGGED 50k/s Before test I was convinced that temporary tables in postgres >= 9.1 are unlogged A temporary table is a brief table; its name means; it presents at the time of a database session. Unlogged table is designed for temporary data, with high write performance, but data will be lost when PostgreSQL process crashes. If your database crash or shutdown abnormally, the UNLOGGED table may lose or truncate automatically. 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