Merge sanja.is.com.ua:/home/bell/mysql/bk/mysql-5.0

into sanja.is.com.ua:/home/bell/mysql/bk/work-update-5.0

Author: bell@sanja.is.com.ua

mysql-test/r/lock_multi.result

@@ -26,7 +26,7 @@ lock table t1 read;
  update t1,t2 set c=a where b=d;
 select c from t2;
 c
-1
+2
 drop table t1;
 drop table t2;
 create table t1 (a int);

mysql-test/r/multi_update.result

@@ -155,7 +155,6 @@ ERROR HY000: Table 't2' was locked with a READ lock and can't be updated
 UPDATE t1,t2 SET t1.d=t2.d,t2.d=30 WHERE t1.n=t2.n;
 ERROR HY000: Table 't2' was locked with a READ lock and can't be updated
 UPDATE t1,t2 SET t1.d=t2.d WHERE t1.n=t2.n;
-ERROR HY000: Table 't2' was locked with a READ lock and can't be updated
 unlock tables;
 LOCK TABLES t1 write, t2 write;
 UPDATE t1,t2 SET t1.d=t2.d WHERE t1.n=t2.n;
@@ -461,6 +460,7 @@ drop table t1, t2, t3;
 create table t1 (col1 int);
 create table t2 (col1 int);
 update t1,t2 set t1.col1 = (select max(col1) from t1) where t1.col1 = t2.col1;
+ERROR HY000: You can't specify target table 't1' for update in FROM clause
 delete t1 from t1,t2 where t1.col1 < (select max(col1) from t1) and t1.col1 = t2.col1;
 ERROR HY000: You can't specify target table 't1' for update in FROM clause
 drop table t1,t2;
@@ -490,3 +490,24 @@ insert into t2 select * from t1;
 delete t1,t2 from t2,t1 where t1.a<'B' and t2.b=t1.b;
 set @@storage_engine=@ttype_save;
 drop table t1,t2;
+create table t1 (a int, b int);
+insert into t1 values (1, 2), (2, 3), (3, 4);
+create table t2 (a int);
+insert into t2 values (10), (20), (30);
+create view v1 as select a as b, a/10 as a from t2;
+lock table t1 write;
+ alter table t1 add column c int default 100 after a;
+ update t1, v1 set t1.b=t1.a+t1.b+v1.b where t1.a=v1.a;
+unlock tables;
+select * from t1;
+a	c	b
+1	100	13
+2	100	25
+3	100	37
+select * from t2;
+a
+10
+20
+30
+drop view v1;
+drop table t1, t2;

mysql-test/r/view.result

@@ -1339,16 +1339,14 @@ c
 prepare stmt1 from "update v1,t1 set v1.s1=? where t1.s1=v1.s1";
 set @arg='d';
 execute stmt1 using @arg;
-ERROR HY000: Table 't1' is read only
 select * from v1;
 s1
-c
+d
 set @arg='e';
 execute stmt1 using @arg;
-ERROR HY000: Table 't1' is read only
 select * from v1;
 s1
-c
+e
 deallocate prepare stmt1;
 drop view v1;
 drop table t1;

mysql-test/t/multi_update.test

@@ -159,8 +159,6 @@ LOCK TABLES t1 write, t2 read;
 DELETE t1.*, t2.* FROM t1,t2 where t1.n=t2.n;
 --error 1099
 UPDATE t1,t2 SET t1.d=t2.d,t2.d=30 WHERE t1.n=t2.n;
---QQ This should not generate an error
---error 1099
 UPDATE t1,t2 SET t1.d=t2.d WHERE t1.n=t2.n;
 unlock tables;
 LOCK TABLES t1 write, t2 write;
@@ -428,7 +426,7 @@ drop table t1, t2, t3;
 #
 create table t1 (col1 int); 
 create table t2 (col1 int);
--- QQ The following should give error 1093
+-- error 1093
 update t1,t2 set t1.col1 = (select max(col1) from t1) where t1.col1 = t2.col1;
 -- error 1093
 delete t1 from t1,t2 where t1.col1 < (select max(col1) from t1) and t1.col1 = t2.col1;
@@ -479,3 +477,35 @@ delete t1,t2 from t2,t1 where t1.a<'B' and t2.b=t1.b;
 
 set @@storage_engine=@ttype_save;
 drop table t1,t2;
+
+create table t1 (a int, b int);
+insert into t1 values (1, 2), (2, 3), (3, 4);
+create table t2 (a int);
+insert into t2 values (10), (20), (30);
+create view v1 as select a as b, a/10 as a from t2;
+
+connect (locker,localhost,root,,test);
+connection locker;
+lock table t1 write;
+
+connect (changer,localhost,root,,test);
+connection changer;
+send alter table t1 add column c int default 100 after a;
+
+connect (updater,localhost,root,,test);
+connection updater;
+send update t1, v1 set t1.b=t1.a+t1.b+v1.b where t1.a=v1.a;
+
+connection locker;
+sleep 2;
+unlock tables;
+
+connection changer;
+reap;
+
+connection updater;
+reap;
+select * from t1;
+select * from t2;
+drop view v1;
+drop table t1, t2;

mysql-test/t/view.test

@@ -1300,13 +1300,9 @@ update v1,t1 set v1.s1='c' where t1.s1=v1.s1;
 select * from v1;
 prepare stmt1 from "update v1,t1 set v1.s1=? where t1.s1=v1.s1";
 set @arg='d';
--- QQ This should not generate an error
---error 1036
 execute stmt1 using @arg;
 select * from v1;
 set @arg='e';
--- QQ This should not generate an error
---error 1036
 execute stmt1 using @arg;
 select * from v1;
 deallocate prepare stmt1;

sql/item.cc

@@ -117,6 +117,23 @@ void Item::cleanup()
   DBUG_VOID_RETURN;
 }
 
+
+/*
+  cleanup() item if it is 'fixed'
+
+  SYNOPSIS
+    cleanup_processor()
+    arg - a dummy parameter, is not used here
+*/
+
+bool Item::cleanup_processor(byte *arg)
+{
+  if (fixed)
+    cleanup();
+  return FALSE;
+}
+
+
 Item_ident::Item_ident(const char *db_name_par,const char *table_name_par,
 		       const char *field_name_par)
   :orig_db_name(db_name_par), orig_table_name(table_name_par), 

sql/item.h

@@ -283,6 +283,7 @@ class Item {
 
   virtual bool remove_dependence_processor(byte * arg) { return 0; }
   virtual bool remove_fixed(byte * arg) { fixed= 0; return 0; }
+  virtual bool cleanup_processor(byte *arg);
   virtual bool collect_item_field_processor(byte * arg) { return 0; }
   virtual Item *equal_fields_propagator(byte * arg) { return this; }
   virtual Item *set_no_const_sub(byte *arg) { return this; }

sql/mysql_priv.h

@@ -565,7 +565,11 @@ int mysql_explain_select(THD *thd, SELECT_LEX *sl, char const *type,
 			 select_result *result);
 int mysql_union(THD *thd, LEX *lex, select_result *result,
 		SELECT_LEX_UNIT *unit);
-int mysql_handle_derived(LEX *lex);
+int mysql_handle_derived(LEX *lex, int (*processor)(THD *thd,
+                                                    st_lex *lex,
+                                                    st_table_list *table));
+int mysql_derived_prepare(THD *thd, LEX *lex, TABLE_LIST *t);
+int mysql_derived_filling(THD *thd, LEX *lex, TABLE_LIST *t);
 Field *create_tmp_field(THD *thd, TABLE *table,Item *item, Item::Type type,
 			Item ***copy_func, Field **from_field,
 			bool group, bool modify_item, uint convert_blob_length);
@@ -792,7 +796,6 @@ void wait_for_refresh(THD *thd);
 int open_tables(THD *thd, TABLE_LIST *tables, uint *counter);
 int simple_open_n_lock_tables(THD *thd,TABLE_LIST *tables);
 int open_and_lock_tables(THD *thd,TABLE_LIST *tables);
-void relink_tables_for_derived(THD *thd);
 int lock_tables(THD *thd, TABLE_LIST *tables, uint counter);
 TABLE *open_temporary_table(THD *thd, const char *path, const char *db,
 			    const char *table_name, bool link_in_list);

sql/sql_base.cc

@@ -44,6 +44,7 @@ static my_bool open_new_frm(const char *path, const char *alias,
 			    uint db_stat, uint prgflag,
 			    uint ha_open_flags, TABLE *outparam,
 			    TABLE_LIST *table_desc, MEM_ROOT *mem_root);
+static void relink_tables_for_multidelete(THD *thd);
 
 extern "C" byte *table_cache_key(const byte *record,uint *length,
 				 my_bool not_used __attribute__((unused)))
@@ -1857,21 +1858,23 @@ int open_and_lock_tables(THD *thd, TABLE_LIST *tables)
 {
   DBUG_ENTER("open_and_lock_tables");
   uint counter;
-  if (open_tables(thd, tables, &counter) || 
+  if (open_tables(thd, tables, &counter) ||
       lock_tables(thd, tables, counter) ||
-      mysql_handle_derived(thd->lex))
+      mysql_handle_derived(thd->lex, &mysql_derived_prepare) ||
+      (thd->fill_derived_tables() &&
+       mysql_handle_derived(thd->lex, &mysql_derived_filling)))
     DBUG_RETURN(thd->net.report_error ? -1 : 1); /* purecov: inspected */
-  relink_tables_for_derived(thd);
+  relink_tables_for_multidelete(thd);
   DBUG_RETURN(0);
 }
 
 
 /*
   Let us propagate pointers to open tables from global table list
-  to table lists in particular selects if needed.
+  to table lists for multi-delete
 */
 
-void relink_tables_for_derived(THD *thd)
+static void relink_tables_for_multidelete(THD *thd)
 {
   if (thd->lex->all_selects_list->next_select_in_list() ||
       thd->lex->time_zone_tables_used)

sql/sql_class.h

@@ -1131,8 +1131,12 @@ class THD :public ilink,
   {
     return command == COM_PREPARE;
   }
-  inline gptr trans_alloc(unsigned int size) 
-  { 
+  inline bool fill_derived_tables()
+  {
+    return !only_prepare() && !lex->only_view_structure();
+  }
+  inline gptr trans_alloc(unsigned int size)
+  {
     return alloc_root(&transaction.mem_root,size);
   }