TEMPORARY or TEMP

If specified, the table is created as a 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). 
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. Any indexes created on a 
temporary table are automatically temporary as well. 

Optionally, GLOBAL or LOCAL can be written before TEMPORARY or TEMP. This makes no difference in 
PostgreSQL, but see Compatibility.