MySQL temporary vs memory table in stored procedures

Question

What\'s is better to use in a stored procedure: a temporary table or a memory table?

The table is used to stored summary data for reports.

Are there any trade o

Answer 1

In MySQL, temporary tables are seriously crippled:

http://dev.mysql.com/doc/refman/5.6/en/temporary-table-problems.html

You cannot refer to a TEMPORARY table more than once in the same query.
For example, the following does not work:

mysql> SELECT * FROM temp_table, temp_table AS t2;
ERROR 1137: Can't reopen table: 'temp_table'