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Fix for bug #32559: connection hangs on query with name_const

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Problem: passing a non-constant name to the NAME_CONST function results in a crash.

Fix: check the NAME_CONST name argument; return fake item type if we got
non-constant argument(s).


mysql-test/r/func_misc.result:
  Fix for bug #32559: connection hangs on query with name_const
    - test result.
mysql-test/t/func_misc.test:
  Fix for bug #32559: connection hangs on query with name_const
    - test case.
sql/item.cc:
  Fix for bug #32559: connection hangs on query with name_const
    - Item_name_const::type() now returns NULL_ITEM if non-constant arguments 
      were used to create the item to avoid wrong type casting.
sql/item.h:
  Fix for bug #32559: connection hangs on query with name_const
    - NAME_CONST name argument checked for invariability.
This commit is contained in:
unknown 2007-11-27 09:36:43 +04:00
commit ba974f8371
4 changed files with 32 additions and 3 deletions
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12
mysql-test/t/func_misc.test
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@ -204,5 +204,15 @@ SELECT NAME_CONST('test', 1.0);
SELECT NAME_CONST('test', -1.0);
SELECT NAME_CONST('test', 'test');
--echo End of 5.0 tests
#
# Bug #32559: connection hangs on query with name_const
#
CREATE TABLE t1(a INT);
INSERT INTO t1 VALUES (), (), ();
--error ER_WRONG_ARGUMENTS
SELECT NAME_CONST(a, '1') FROM t1;
--error ER_WRONG_ARGUMENTS
SET INSERT_ID= NAME_CONST(a, a);
DROP TABLE t1;
--echo End of 5.0 tests