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select.result, select.test:

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Added a test case for bug #11745.
sql_select.cc:
  Fixed bug # 11745.
  Added support of where clause for queries with FROM DUAL.
sql_yacc.yy:
  Fixed bug # 11745.
  Added optional where clause for queries with FROM DUAL.


sql/sql_yacc.yy:
  Fixed bug # 11745.
  Added optional where clause for queries with FROM DUAL.
sql/sql_select.cc:
  Fixed bug # 11745.
  Added support of where clause for queries with FROM DUAL.
mysql-test/t/select.test:
  Added a test case for bug #11745.
mysql-test/r/select.result:
  Added a test case for bug #11745.
This commit is contained in:
unknown 2005-07-17 09:46:14 -07:00
parent 89519b677e
commit 6a88fa48ae
4 changed files with 36 additions and 2 deletions
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16
mysql-test/r/select.result
View file

@ -2582,3 +2582,19 @@ a
254
255
drop table t2;
CREATE TABLE t1 (a int, b int, c int);
INSERT INTO t1
SELECT 50, 3, 3 FROM DUAL
WHERE NOT EXISTS
(SELECT * FROM t1 WHERE a = 50 AND b = 3);
SELECT * FROM t1;
a b c
50 3 3
INSERT INTO t1
SELECT 50, 3, 3 FROM DUAL
WHERE NOT EXISTS
(SELECT * FROM t1 WHERE a = 50 AND b = 3);
SELECT * FROM t1;
a b c
50 3 3
DROP TABLE t1;

18
mysql-test/t/select.test
View file

@ -2138,3 +2138,21 @@ insert into t2 values (0), (254), (255);
explain select * from t2 where a > -1;
select * from t2 where a > -1;
drop table t2;
#
# Bug #11745: SELECT ... FROM DUAL with WHERE condition
#
CREATE TABLE t1 (a int, b int, c int);
INSERT INTO t1
SELECT 50, 3, 3 FROM DUAL
WHERE NOT EXISTS
(SELECT * FROM t1 WHERE a = 50 AND b = 3);
SELECT * FROM t1;
INSERT INTO t1
SELECT 50, 3, 3 FROM DUAL
WHERE NOT EXISTS
(SELECT * FROM t1 WHERE a = 50 AND b = 3);
SELECT * FROM t1;
DROP TABLE t1;

2
sql/sql_select.cc
View file

@ -1072,7 +1072,7 @@ JOIN::exec()
else
{
result->send_fields(fields_list,1);
if (!having || having->val_int())
if (cond_value != Item::COND_FALSE && (!having || having->val_int()))
{
if (do_send_rows && (procedure ? (procedure->send_row(fields_list) ||
procedure->end_of_records())

2
sql/sql_yacc.yy
View file

@ -2459,7 +2459,7 @@ select_into:
select_from:
FROM join_table_list where_clause group_clause having_clause
opt_order_clause opt_limit_clause procedure_clause
| FROM DUAL_SYM opt_limit_clause
| FROM DUAL_SYM where_clause opt_limit_clause
/* oracle compatibility: oracle always requires FROM clause,
and DUAL is system table without fields.
Is "SELECT 1 FROM DUAL" any better than "SELECT 1" ?