Bug#51242 HAVING clause on table join produce incorrect results

The problem is that when we make conditon for
grouped result const part of condition is cut off.
It happens because some parts of 'having' condition
which refer to outer join become const after
make_join_statistics. These parts may be lost
during further having condition transformation
in JOIN::exec. The fix is adding 'having'
condition check for const tables after
make_join_statistics is performed.


mysql-test/r/having.result:
  test case
mysql-test/t/having.test:
  test result
sql/sql_select.cc:
  added 'having' condition check for const tables
  after make_join_statistics is performed.

mysql-test/r/having.result

@@ -450,4 +450,39 @@ HAVING amount > 0
 ORDER BY t1.id1;
 id1	amount
 DROP TABLE t1;
+#
+# Bug#48916 Server incorrectly processing HAVING clauses with an ORDER BY clause
+#
+CREATE TABLE t1 (f1 INT PRIMARY KEY, f2 INT, f3 INT);
+INSERT INTO t1 VALUES (2,7,9), (4,7,9), (6,2,9), (17,0,9);
+SELECT table1.f1, table2.f2
+FROM t1 AS table1
+JOIN t1 AS table2 ON table1.f3 = table2.f3
+WHERE table2.f1 = 2
+GROUP BY table1.f1, table2.f2
+HAVING (table2.f2 = 8 AND table1.f1 >= 6);
+f1	f2
+EXPLAIN EXTENDED
+SELECT table1.f1, table2.f2
+FROM t1 AS table1
+JOIN t1 AS table2 ON table1.f3 = table2.f3
+WHERE table2.f1 = 2
+GROUP BY table1.f1, table2.f2
+HAVING (table2.f2 = 8 AND table1.f1 >= 6);
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
+1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible HAVING noticed after reading const tables
+Warnings:
+Note	1003	select `test`.`table1`.`f1` AS `f1`,'7' AS `f2` from `test`.`t1` `table1` join `test`.`t1` `table2` where ((`test`.`table1`.`f3` = '9')) group by `test`.`table1`.`f1`,'7' having (('7' = 8) and (`test`.`table1`.`f1` >= 6))
+EXPLAIN EXTENDED
+SELECT table1.f1, table2.f2
+FROM t1 AS table1
+JOIN t1 AS table2 ON table1.f3 = table2.f3
+WHERE table2.f1 = 2
+GROUP BY table1.f1, table2.f2
+HAVING (table2.f2 = 8);
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
+1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible HAVING noticed after reading const tables
+Warnings:
+Note	1003	select `test`.`table1`.`f1` AS `f1`,'7' AS `f2` from `test`.`t1` `table1` join `test`.`t1` `table2` where ((`test`.`table1`.`f3` = '9')) group by `test`.`table1`.`f1`,'7' having ('7' = 8)
+DROP TABLE t1;
 End of 5.0 tests

mysql-test/t/having.test

@@ -467,5 +467,35 @@ ORDER BY t1.id1;
 
 DROP TABLE t1;
 
+--echo #
+--echo # Bug#48916 Server incorrectly processing HAVING clauses with an ORDER BY clause
+--echo #
+CREATE TABLE t1 (f1 INT PRIMARY KEY, f2 INT, f3 INT);
+INSERT INTO t1 VALUES (2,7,9), (4,7,9), (6,2,9), (17,0,9);
+
+SELECT table1.f1, table2.f2
+FROM t1 AS table1
+JOIN t1 AS table2 ON table1.f3 = table2.f3
+WHERE table2.f1 = 2
+GROUP BY table1.f1, table2.f2
+HAVING (table2.f2 = 8 AND table1.f1 >= 6);
+
+EXPLAIN EXTENDED
+SELECT table1.f1, table2.f2
+FROM t1 AS table1
+JOIN t1 AS table2 ON table1.f3 = table2.f3
+WHERE table2.f1 = 2
+GROUP BY table1.f1, table2.f2
+HAVING (table2.f2 = 8 AND table1.f1 >= 6);
+
+EXPLAIN EXTENDED
+SELECT table1.f1, table2.f2
+FROM t1 AS table1
+JOIN t1 AS table2 ON table1.f3 = table2.f3
+WHERE table2.f1 = 2
+GROUP BY table1.f1, table2.f2
+HAVING (table2.f2 = 8);
+
+DROP TABLE t1;
 
 --echo End of 5.0 tests

sql/sql_select.cc

@@ -1112,6 +1112,31 @@ JOIN::optimize()
   {
     conds=new Item_int((longlong) 0,1);	// Always false
   }
+
+  /*
+    It's necessary to check const part of HAVING cond as
+    there is a chance that some cond parts may become
+    const items after make_join_statisctics(for example
+    when Item is a reference to cost table field from
+    outer join).
+    This check is performed only for those conditions
+    which do not use aggregate functions. In such case
+    temporary table may not be used and const condition
+    elements may be lost during further having
+    condition transformation in JOIN::exec.
+  */
+  if (having && !having->with_sum_func)
+  {
+    COND *const_cond= make_cond_for_table(having, const_table_map, 0);
+    DBUG_EXECUTE("where", print_where(const_cond, "const_having_cond",
+                                      QT_ORDINARY););
+    if (const_cond && !const_cond->val_int())
+    {
+      zero_result_cause= "Impossible HAVING noticed after reading const tables";
+      DBUG_RETURN(0);
+    }
+  }
+
   if (make_join_select(this, select, conds))
   {
     zero_result_cause=