so that extra slashes are handled in tmpdir. (Bug #8497)
sql/ha_heap.cc:
use constants instead of magic integers on fn_format() calls
sql/sql_select.cc:
Construct filename for temporary tables using fn_format() to get consistent
filenames.
mysql-test/t/temp_table.test:
Add new regression test
mysql-test/r/temp_table.result:
Add new test results
