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Fixed bug #27352.

Browse source 
The SELECT query with more than 31 nested dependent SELECT queries returned
wrong result.

New error message has been added: ER_TOO_HIGH_LEVEL_OF_NESTING_FOR_SELECT.
It will be reported as: "Too high level of nesting for select".


sql/sql_parse.cc:
  Fixed bug #27352.
  The Item_sum::register_sum_func method has been modified to return
  TRUE on exceeding of allowed level of SELECT nesting and to report
  corresponding error message.
sql/unireg.h:
  Fixed bug #27352.
  Constant definition has been added: maximal allowed level of SELECT nesting.
mysql-test/t/select.test:
  Updated test case for bug #27352.
mysql-test/r/select.result:
  Updated test case for bug #27352.
sql/share/errmsg.txt:
  Fixed bug #27352.
  New error message has been added: ER_TOO_HIGH_LEVEL_OF_NESTING_FOR_SELECT.
This commit is contained in:
unknown 2007-08-03 01:58:21 +05:00
commit a53510f0be
5 changed files with 49 additions and 0 deletions
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30
mysql-test/t/select.test
View file

@ -3370,4 +3370,34 @@ EXPLAIN SELECT COUNT(*) FROM t1 f1 INNER JOIN t1 f2
WHERE 1 AND f1.b NOT IN (100,2232,3343,51111);
DROP TABLE t1;
#
# Bug #27352: Incorrect result of nested selects instead of error reporting
#
CREATE TABLE t1 (c1 INT, c2 INT);
INSERT INTO t1 VALUES (1,11), (2,22), (2,22);
let $n= 31;
let $q= COUNT(c2);
while ($n)
{
let $q= (SELECT $q);
dec $n;
}
--disable_warnings
eval EXPLAIN SELECT c1 FROM t1 WHERE $q > 0;
--enable_warnings
let $n= 64;
let $q= COUNT(c2);
while ($n)
{
let $q= (SELECT $q);
dec $n;
}
--error ER_TOO_HIGH_LEVEL_OF_NESTING_FOR_SELECT
eval EXPLAIN SELECT c1 FROM t1 WHERE $q > 0;
DROP TABLE t1;
--echo End of 5.0 tests