MySQL 5.6 Reference Manual Including MySQL NDB Cluster 7.3-7.4 Reference Guide
Temporary tables created with
CREATE TEMPORARY
TABLE
have the following limitations:
TEMPORARY
tables are supported only by
the InnoDB
, MEMORY
,
MyISAM
, and MERGE
storage engines.
Temporary tables are not supported for NDB Cluster.
The SHOW TABLES
statement
does not list TEMPORARY
tables.
To rename TEMPORARY
tables,
RENAME TABLE
does not work. Use
ALTER TABLE
instead:
ALTER TABLE old_name RENAME new_name;
You cannot refer to a TEMPORARY
table
more than once in the same query. For example, the
following does not work:
SELECT * FROM temp_table JOIN temp_table AS t2;
The statement produces this error:
ERROR 1137: Can't reopen table: 'temp_table'
The Can't reopen table error also occurs if you refer to a temporary table multiple times in a stored function under different aliases, even if the references occur in different statements within the function. It may occur for temporary tables created outside stored functions and referred to across multiple calling and callee functions.
If a TEMPORARY
is created with the same
name as an existing non-TEMPORARY
table, the non-TEMPORARY
table is
hidden until the TEMPORARY
table is
dropped, even if the tables use different storage engines.
There are known issues in using temporary tables with replication. See Section 17.4.1.29, “Replication and Temporary Tables”, for more information.