BUG#8807 Select crash server

 - Add function Item_param::fix_fields which will update any subselect they are part of and indicate that the subsleect is not const during prepare phase, and thus should not be executed during prepare.


mysql-test/include/ps_query.inc:
  Adde new test case
mysql-test/r/ps_2myisam.result:
  Update test result
mysql-test/r/ps_3innodb.result:
  Update test result
mysql-test/r/ps_4heap.result:
  Update test result
mysql-test/r/ps_5merge.result:
  Update test result
mysql-test/r/ps_6bdb.result:
  Update test result
mysql-test/r/ps_7ndb.result:
  Update test result
sql/item.cc:
  Add function Item_param::fix_fields, which will mark any subselects they are part of as not being a constant expression unless the param value is specified, ie. it will be not be constant during prepare phase.
sql/item.h:
  Adde Item_param::fix_fields
sql/item_subselect.h:
  Make Item_param::fix_field friend of Item_subselect

mysql-test/include/ps_query.inc

@@ -421,6 +421,11 @@ prepare stmt1 from ' select a, ?, b FROM t1 outer_table where
    b=? and a = (select ? from t1 where b = ? ) ' ;
 execute stmt1 using @arg00, @arg01, @arg02, @arg03 ;
 
+# Bug#8807
+prepare stmt1 from 'select c4 FROM t9 where
+    c13 = (select MAX(b) from t1 where a = ?) and c22 = ? ' ;
+execute stmt1 using @arg01, @arg02;
+
 ######## correlated subquery
 # no parameter
 prepare stmt1 from ' select a, b FROM t1 outer_table where

mysql-test/r/ps_2myisam.result

@@ -768,6 +768,10 @@ prepare stmt1 from ' select a, ?, b FROM t1 outer_table where
 execute stmt1 using @arg00, @arg01, @arg02, @arg03 ;
 a	?	b
 2	1	two
+prepare stmt1 from 'select c4 FROM t9 where
+    c13 = (select MAX(b) from t1 where a = ?) and c22 = ? ' ;
+execute stmt1 using @arg01, @arg02;
+c4
 prepare stmt1 from ' select a, b FROM t1 outer_table where
    a = (select a from t1 where b = outer_table.b ) order by a ';
 execute stmt1 ;

mysql-test/r/ps_3innodb.result

@@ -768,6 +768,10 @@ prepare stmt1 from ' select a, ?, b FROM t1 outer_table where
 execute stmt1 using @arg00, @arg01, @arg02, @arg03 ;
 a	?	b
 2	1	two
+prepare stmt1 from 'select c4 FROM t9 where
+    c13 = (select MAX(b) from t1 where a = ?) and c22 = ? ' ;
+execute stmt1 using @arg01, @arg02;
+c4
 prepare stmt1 from ' select a, b FROM t1 outer_table where
    a = (select a from t1 where b = outer_table.b ) order by a ';
 execute stmt1 ;

mysql-test/r/ps_4heap.result

@@ -769,6 +769,10 @@ prepare stmt1 from ' select a, ?, b FROM t1 outer_table where
 execute stmt1 using @arg00, @arg01, @arg02, @arg03 ;
 a	?	b
 2	1	two
+prepare stmt1 from 'select c4 FROM t9 where
+    c13 = (select MAX(b) from t1 where a = ?) and c22 = ? ' ;
+execute stmt1 using @arg01, @arg02;
+c4
 prepare stmt1 from ' select a, b FROM t1 outer_table where
    a = (select a from t1 where b = outer_table.b ) order by a ';
 execute stmt1 ;

mysql-test/r/ps_5merge.result

@@ -811,6 +811,10 @@ prepare stmt1 from ' select a, ?, b FROM t1 outer_table where
 execute stmt1 using @arg00, @arg01, @arg02, @arg03 ;
 a	?	b
 2	1	two
+prepare stmt1 from 'select c4 FROM t9 where
+    c13 = (select MAX(b) from t1 where a = ?) and c22 = ? ' ;
+execute stmt1 using @arg01, @arg02;
+c4
 prepare stmt1 from ' select a, b FROM t1 outer_table where
    a = (select a from t1 where b = outer_table.b ) order by a ';
 execute stmt1 ;
@@ -3821,6 +3825,10 @@ prepare stmt1 from ' select a, ?, b FROM t1 outer_table where
 execute stmt1 using @arg00, @arg01, @arg02, @arg03 ;
 a	?	b
 2	1	two
+prepare stmt1 from 'select c4 FROM t9 where
+    c13 = (select MAX(b) from t1 where a = ?) and c22 = ? ' ;
+execute stmt1 using @arg01, @arg02;
+c4
 prepare stmt1 from ' select a, b FROM t1 outer_table where
    a = (select a from t1 where b = outer_table.b ) order by a ';
 execute stmt1 ;

mysql-test/r/ps_6bdb.result

@@ -768,6 +768,10 @@ prepare stmt1 from ' select a, ?, b FROM t1 outer_table where
 execute stmt1 using @arg00, @arg01, @arg02, @arg03 ;
 a	?	b
 2	1	two
+prepare stmt1 from 'select c4 FROM t9 where
+    c13 = (select MAX(b) from t1 where a = ?) and c22 = ? ' ;
+execute stmt1 using @arg01, @arg02;
+c4
 prepare stmt1 from ' select a, b FROM t1 outer_table where
    a = (select a from t1 where b = outer_table.b ) order by a ';
 execute stmt1 ;

mysql-test/r/ps_7ndb.result

@@ -768,6 +768,10 @@ prepare stmt1 from ' select a, ?, b FROM t1 outer_table where
 execute stmt1 using @arg00, @arg01, @arg02, @arg03 ;
 a	?	b
 2	1	two
+prepare stmt1 from 'select c4 FROM t9 where
+    c13 = (select MAX(b) from t1 where a = ?) and c22 = ? ' ;
+execute stmt1 using @arg01, @arg02;
+c4
 prepare stmt1 from ' select a, b FROM t1 outer_table where
    a = (select a from t1 where b = outer_table.b ) order by a ';
 execute stmt1 ;

sql/item.cc

@@ -1319,6 +1319,34 @@ bool Item_param::convert_str_value(THD *thd)
   return rc;
 }
 
+bool Item_param::fix_fields(THD *thd, TABLE_LIST *tables, Item **ref)
+{
+  DBUG_ASSERT(fixed == 0);
+  SELECT_LEX *cursel= (SELECT_LEX *) thd->lex->current_select;
+
+  /*
+    Parameters in a subselect should mark the subselect as not constant
+    during prepare
+  */
+  if (state == NO_VALUE)
+  {
+    /*
+      SELECT_LEX_UNIT::item set only for subqueries, so test of it presence
+      can be barrier to stop before derived table SELECT or very outer SELECT
+    */
+    for(;
+        cursel->master_unit()->item;
+        cursel= cursel->outer_select())
+    {
+      Item_subselect *subselect_item= cursel->master_unit()->item;
+      subselect_item->used_tables_cache|= OUTER_REF_TABLE_BIT;
+      subselect_item->const_item_cache= 0;
+    }
+  }
+  fixed= 1;
+  return 0;
+}
+
 /* End of Item_param related */
 
 

sql/item.h

@@ -559,6 +559,7 @@ class Item_param :public Item
   bool get_time(TIME *tm);
   bool get_date(TIME *tm, uint fuzzydate);
   int  save_in_field(Field *field, bool no_conversions);
+  bool fix_fields(THD *, struct st_table_list *, Item **);
 
   void set_null();
   void set_int(longlong i, uint32 max_length_arg);

sql/item_subselect.h

@@ -119,6 +119,7 @@ class Item_subselect :public Item_result_field
   friend class Item_in_optimizer;
   friend bool Item_field::fix_fields(THD *, TABLE_LIST *, Item **);
   friend bool Item_ref::fix_fields(THD *, TABLE_LIST *, Item **);
+  friend bool Item_param::fix_fields(THD *, TABLE_LIST *, Item **);
 };
 
 /* single value subselect */