Merge tulin@bk-internal.mysql.com:/home/bk/mysql-5.0

into dl145c.mysql.com:/home/ndbdev/tomas/mysql-5.1

mysql-test/r/query_cache.result

@@ -1007,4 +1007,33 @@ abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzab
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 flush query cache;
 drop table t1, t2;
+create table t1 (a int);
+insert into t1 values (1),(2);
+CREATE PROCEDURE `p1`()
+begin
+Declare c1 cursor for select a from t1;
+open c1;
+select * from t1;
+end//
+call p1()//
+a
+1
+2
+drop procedure p1;
+create function f1() returns int
+begin
+Declare var1 int;
+select max(a) from t1 into var1;
+return var1;
+end//
+create procedure `p1`()
+begin
+select a, f1() from t1;
+end//
+call p1()//
+a	f1()
+1	2
+2	2
+drop procedure p1//
+drop table t1//
 set GLOBAL query_cache_size=0;

mysql-test/t/query_cache.test

@@ -756,4 +756,36 @@ flush query cache;
 
 drop table t1, t2;
 
+#
+# SP cursors and selects with query cache (BUG#9715)
+#
+create table t1 (a int);
+insert into t1 values (1),(2);
+
+delimiter //;
+CREATE PROCEDURE `p1`()
+begin
+Declare c1 cursor for select a from t1;
+open c1;
+select * from t1;
+end//
+call p1()//
+drop procedure p1;
+
+create function f1() returns int
+begin
+Declare var1 int;
+select max(a) from t1 into var1;
+return var1;
+end//
+create procedure `p1`()
+begin
+ select a, f1() from t1;
+end//
+call p1()//
+drop procedure p1//
+
+drop table t1//
+delimiter ;//
+
 set GLOBAL query_cache_size=0;

sql/item.h

@@ -1352,12 +1352,9 @@ public:
   {
     (*ref)->save_in_field(result_field, no_conversions);
   }
-  Item *real_item() {
-    Item *item= this;
-    do
-      item= *((Item_ref *)item)->ref;
-    while (item->type() == Item::REF_ITEM);
-    return item;
+  Item *real_item()
+  {
+    return (*ref)->real_item();
   }
   bool walk(Item_processor processor, byte *arg)
   { return (*ref)->walk(processor, arg); }

sql/sp_head.h

@@ -377,6 +377,10 @@ public:
     return (uint)m_lex->sql_command;
   }
 
+  void disable_query_cache()
+  {
+    m_lex->safe_to_cache_query= 0;
+  }
 private:
 
   LEX *m_lex;

sql/sp_rcontext.cc

@@ -169,6 +169,17 @@ sp_rcontext::pop_cursors(uint count)
  *
  */
 
+sp_cursor::sp_cursor(sp_lex_keeper *lex_keeper)
+  :m_lex_keeper(lex_keeper), m_prot(NULL), m_isopen(0), m_current_row(NULL)
+{
+  /*
+    currsor can't be stored in QC, so we should prevent opening QC for
+    try to write results which are absent.
+  */
+  lex_keeper->disable_query_cache();
+}
+
+
 /*
   pre_open cursor
 

sql/sp_rcontext.h

@@ -203,11 +203,7 @@ class sp_cursor : public Sql_alloc
 {
 public:
 
-  sp_cursor(sp_lex_keeper *lex_keeper)
-    : m_lex_keeper(lex_keeper), m_prot(NULL), m_isopen(0), m_current_row(NULL)
-  {
-    /* Empty */
-  }
+  sp_cursor(sp_lex_keeper *lex_keeper);
 
   virtual ~sp_cursor()
   {

sql/sql_select.cc

@@ -7954,7 +7954,7 @@ Field *create_tmp_field(THD *thd, TABLE *table,Item *item, Item::Type type,
                                        convert_blob_length);
   }
   case Item::REF_ITEM:
-    if ( ((Item_ref*)item)->real_item()->type() == Item::FIELD_ITEM)
+    if ( item->real_item()->type() == Item::FIELD_ITEM)
     {
       Item_field *field= (Item_field*) *((Item_ref*)item)->ref;
       Field *new_field= create_tmp_field_from_field(thd, 

tests/mysql_client_test.c

@@ -13156,14 +13156,24 @@ static void test_bug11111()
   char		buf[2][20];
   long		len[2];
   int i;
+  int rc;
   const char * query = "SELECT DISTINCT f1,ff2 FROM v1";
+  myheader("test_bug11111");
 
-  mysql_query(mysql, "drop table if exists t1, t2, v1");
-  mysql_query(mysql, "create table t1 (f1 int, f2 int)");
-  mysql_query(mysql, "create table t2 (ff1 int, ff2 int)");
-  mysql_query(mysql, "create view v1 as select * from t1, t2 where f1=ff1");
-  mysql_query(mysql, "insert into t1 values (1,1), (2,2), (3,3)");
-  mysql_query(mysql, "insert into t2 values (1,1), (2,2), (3,3)");
+  rc= mysql_query(mysql, "drop table if exists t1, t2, v1");
+  myquery(rc);
+  rc= mysql_query(mysql, "drop view if exists t1, t2, v1");
+  myquery(rc);
+  rc= mysql_query(mysql, "create table t1 (f1 int, f2 int)");
+  myquery(rc);
+  rc= mysql_query(mysql, "create table t2 (ff1 int, ff2 int)");
+  myquery(rc);
+  rc= mysql_query(mysql, "create view v1 as select * from t1, t2 where f1=ff1");
+  myquery(rc);
+  rc= mysql_query(mysql, "insert into t1 values (1,1), (2,2), (3,3)");
+  myquery(rc);
+  rc= mysql_query(mysql, "insert into t2 values (1,1), (2,2), (3,3)");
+  myquery(rc);
 
   stmt = mysql_stmt_init(mysql);
 
@@ -13182,9 +13192,13 @@ static void test_bug11111()
     printf("Error: %s\n", mysql_stmt_error(stmt));
 
   mysql_stmt_fetch(stmt);
+  printf("return: %s", buf[1]);
   DIE_UNLESS(!strcmp(buf[1],"1"));
   mysql_stmt_close(stmt);
-  mysql_query(mysql, "drop table t1, t2, v1");
+  rc= mysql_query(mysql, "drop view v1");
+  myquery(rc);
+  rc= mysql_query(mysql, "drop table t1, t2");
+  myquery(rc);
 }
 
 /*