We didn't use 'only index' for tables of type 'const'. (Bug #3497)


mysql-test/r/func_str.result:
  New testfin
mysql-test/r/key.result:
  New test
mysql-test/r/key_primary.result:
  Update after "We didn't use 'only index' for tables of type 'const'" fix.
mysql-test/r/null_key.result:
  Update after "We didn't use 'only index' for tables of type 'const'" fix.
mysql-test/r/subselect.result:
  Update after "We didn't use 'only index' for tables of type 'const'" fix.
mysql-test/t/func_str.test:
  Updated bug texts
  Added test for conversion of long string value to integer (Bug #3472)
mysql-test/t/key.test:
  Test of key read with primary key (Bug #3497)
sql/item.cc:
  Added assert
sql/sql_base.cc:
  Fixed crashing bug with alter table when table was in use (Bug #3643)
sql/sql_load.cc:
  Indentation fixes
sql/sql_select.cc:
  We didn't use 'only index' for tables of type 'const'. (Bug #3497)