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select_found.result, select_found.test:

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Added a test case for bug #7945.
sql_select.cc:
  Fixed bug #7945. If DISTINCT is used only with constants
  in a query with GROUP BY, we can apply an optimization
  that set LIMIT to 1 only in the case when there is 
  no SQL_CALC_FOUND_ROWS.


sql/sql_select.cc:
  Fixed bug #7945. If DISTINCT is used only with constants
  in a query with GROUP BY, we can apply an optimization
  that set LIMIT to 1 only in the case when there is 
  no SQL_CALC_FOUND_ROWS.
mysql-test/t/select_found.test:
  Added a test case for bug #7945.
mysql-test/r/select_found.result:
  Added a test case for bug #7945.
This commit is contained in:
unknown
2005-01-22 02:40:27 -08:00
parent 89a24f9335
commit 25c2d1adb0
3 changed files with 27 additions and 3 deletions
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9
mysql-test/t/select_found.test
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@ -146,3 +146,12 @@ INSERT INTO t1 VALUES (0), (0), (1), (2);
SELECT SQL_CALC_FOUND_ROWS * FROM t1 WHERE a = 0 GROUP BY a HAVING a > 10;
SELECT FOUND_ROWS();
DROP TABLE t1;
#
# Bug #7945: group by + distinct with constant expression + limit
#
CREATE TABLE t1 (a int, b int);
INSERT INTO t1 VALUES (1,2), (1,3), (1,4), (1,5);
SELECT SQL_CALC_FOUND_ROWS DISTINCT 'a' FROM t1 GROUP BY b LIMIT 2;
SELECT FOUND_ROWS();