Merge bk-internal.mysql.com:/home/bk/mysql-4.1/

into serg.mylan:/usr/home/serg/Abk/mysql-4.1

myisam/myisampack.c

@@ -2050,7 +2050,7 @@ static int save_state(MI_INFO *isam_file,PACK_MRG_INFO *mrg,my_off_t new_length,
   share->state.dellink= HA_OFFSET_ERROR;
   share->state.split=(ha_rows) mrg->records;
   share->state.version=(ulong) time((time_t*) 0);
-  if (share->state.key_map != (1ULL << share->base.keys) - 1)
+  if (share->state.key_map != (ULL(1) << share->base.keys) - 1)
   {
     /*
       Some indexes are disabled, cannot use current key_file_length value

mysql-test/r/ps.result

@@ -413,14 +413,40 @@ deallocate prepare stmt;
 create table t1 (a int);
 insert into t1 values (1),(2),(3);
 create table t2 select * from t1;
-PREPARE my_stmt FROM 'create table t2 select * from t1';
+prepare stmt FROM 'create table t2 select * from t1';
 drop table t2;
-execute my_stmt;
+execute stmt;
 drop table t2;
-execute my_stmt;
-execute my_stmt;
+execute stmt;
+execute stmt;
 ERROR 42S01: Table 't2' already exists
 drop table t2;
-execute my_stmt;
+execute stmt;
 drop table t1,t2;
-deallocate prepare my_stmt;
+deallocate prepare stmt;
+create table t1 (a int);
+insert into t1 (a) values (1), (2), (3), (4), (5), (6), (7), (8), (9), (10);
+prepare stmt from "select sql_calc_found_rows * from t1 limit 2";
+execute stmt;
+a
+1
+2
+select found_rows();
+found_rows()
+10
+execute stmt;
+a
+1
+2
+select found_rows();
+found_rows()
+10
+execute stmt;
+a
+1
+2
+select found_rows();
+found_rows()
+10
+deallocate prepare stmt;
+drop table t1;

mysql-test/r/subselect.result

@@ -176,17 +176,17 @@ a	b
 a	b
 1	7
 2	7
-3	8
 4	8
+3	8
 explain extended (select * from t2 where t2.b=(select a from t3 order by 1 desc limit 1)) union (select * from t4 where t4.b=(select max(t2.a)*4 from t2) order by a);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	2	Using where
 2	SUBQUERY	t3	ALL	NULL	NULL	NULL	NULL	3	Using filesort
-3	UNION	t4	ALL	NULL	NULL	NULL	NULL	3	Using where; Using filesort
+3	UNION	t4	ALL	NULL	NULL	NULL	NULL	3	Using where
 4	SUBQUERY	t2	ALL	NULL	NULL	NULL	NULL	2	
 NULL	UNION RESULT	<union1,3>	ALL	NULL	NULL	NULL	NULL	NULL	
 Warnings:
-Note	1003	(select test.t2.a AS `a`,test.t2.b AS `b` from test.t2 where (test.t2.b = (select test.t3.a AS `a` from test.t3 order by test.t3.a desc limit 1))) union (select test.t4.a AS `a`,test.t4.b AS `b` from test.t4 where (test.t4.b = (select (max(test.t2.a) * 4) AS `max(t2.a)*4` from test.t2)) order by test.t4.a)
+Note	1003	(select test.t2.a AS `a`,test.t2.b AS `b` from test.t2 where (test.t2.b = (select test.t3.a AS `a` from test.t3 order by test.t3.a desc limit 1))) union (select test.t4.a AS `a`,test.t4.b AS `b` from test.t4 where (test.t4.b = (select (max(test.t2.a) * 4) AS `max(t2.a)*4` from test.t2)) order by a)
 select (select a from t3 where a<t2.a*4 order by 1 desc limit 1), a from t2;
 (select a from t3 where a<t2.a*4 order by 1 desc limit 1)	a
 3	1

mysql-test/t/ps.test

@@ -422,14 +422,30 @@ deallocate prepare stmt;
 create table t1 (a int); 
 insert into t1 values (1),(2),(3);
 create table t2 select * from t1;
-PREPARE my_stmt FROM 'create table t2 select * from t1';
+prepare stmt FROM 'create table t2 select * from t1';
 drop table t2;
-execute my_stmt;
+execute stmt;
 drop table t2;
-execute my_stmt;
+execute stmt;
 --error 1050
-execute my_stmt;
+execute stmt;
 drop table t2;
-execute my_stmt;
+execute stmt;
 drop table t1,t2;
-deallocate prepare my_stmt;
+deallocate prepare stmt;
+
+#
+# Bug#6088 "FOUND_ROWS returns wrong values for prepared statements when
+# LIMIT is used"
+# 
+create table t1 (a int);
+insert into t1 (a) values (1), (2), (3), (4), (5), (6), (7), (8), (9), (10);
+prepare stmt from "select sql_calc_found_rows * from t1 limit 2";
+execute stmt;
+select found_rows();
+execute stmt;
+select found_rows();
+execute stmt;
+select found_rows();
+deallocate prepare stmt;
+drop table t1;

sql/sql_acl.cc

@@ -3591,7 +3591,7 @@ int mysql_drop_user(THD *thd, List <LEX_USER> &list)
 
 int mysql_revoke_all(THD *thd,  List <LEX_USER> &list)
 {
-  uint counter;
+  uint counter, revoked;
   int result;
   ACL_DB *acl_db;
   TABLE_LIST tables[4];
@@ -3624,7 +3624,14 @@ int mysql_revoke_all(THD *thd,  List <LEX_USER> &list)
     }
 
     /* Remove db access privileges */
-    for (counter= 0 ; counter < acl_dbs.elements ; )
+    /*
+      Because acl_dbs and column_priv_hash shrink and may re-order
+      as privileges are removed, removal occurs in a repeated loop
+      until no more privileges are revoked.
+     */
+    do
+    {
+      for (counter= 0, revoked= 0 ; counter < acl_dbs.elements ; )
       {
 	const char *user,*host;
 	
@@ -3641,20 +3648,24 @@ int mysql_revoke_all(THD *thd,  List <LEX_USER> &list)
 	  {
 	    /*
 	      Don't increment counter as replace_db_table deleted the
-            current element in acl_db's and shifted the higher elements down
+	      current element in acl_dbs.
 	     */
+	    revoked= 1;
 	    continue;
 	  }
 	  result= -1; // Something went wrong
 	}
 	counter++;
       }
+    } while (revoked);
 
     /* Remove column access */
-    for (counter= 0 ; counter < column_priv_hash.records ; )
+    do
+    {
+      for (counter= 0, revoked= 0 ; counter < column_priv_hash.records ; )
       {
 	const char *user,*host;
-      GRANT_TABLE *grant_table= (GRANT_TABLE*) hash_element(&column_priv_hash,
+	GRANT_TABLE *grant_table= (GRANT_TABLE*)hash_element(&column_priv_hash,
 							     counter);
 	if (!(user=grant_table->user))
 	  user= "";
@@ -3670,28 +3681,30 @@ int mysql_revoke_all(THD *thd,  List <LEX_USER> &list)
 				  ~0, 0, 1))
 	  {
 	    result= -1;
-          continue;
 	  }
 	  else
 	  {
 	    if (!grant_table->cols)
+	    {
+	      revoked= 1;
 	      continue;
+	    }
 	    List<LEX_COLUMN> columns;
-          if (replace_column_table(grant_table,tables[3].table, *lex_user,
+	    if (!replace_column_table(grant_table,tables[3].table, *lex_user,
 				      columns,
 				      grant_table->db,
 				      grant_table->tname,
 				      ~0, 1))
-          result= -1;
-          /*
-            Safer to do continue here as replace_table_table changed
-            column_priv_hash and we want to test the current element
-          */
+	    {
+	      revoked= 1;
 	      continue;
 	    }
+	    result= -1;
+	  }
 	}
 	counter++;
       }
+    } while (revoked);
   }
   
   VOID(pthread_mutex_unlock(&acl_cache->lock));

sql/sql_parse.cc

@@ -1563,6 +1563,7 @@ bool dispatch_command(enum enum_server_command command, THD *thd,
   case COM_CREATE_DB:				// QQ: To be removed
     {
       char *db=thd->strdup(packet), *alias;
+      HA_CREATE_INFO create_info;
 
       statistic_increment(com_stat[SQLCOM_CREATE_DB],&LOCK_status);
       // null test to handle EOM
@@ -1574,8 +1575,9 @@ bool dispatch_command(enum enum_server_command command, THD *thd,
       if (check_access(thd,CREATE_ACL,db,0,1,0))
 	break;
       mysql_log.write(thd,command,packet);
+      bzero(&create_info, sizeof(create_info));
       if (mysql_create_db(thd, (lower_case_table_names == 2 ? alias : db),
-                          0, 0) < 0)
+                          &create_info, 0) < 0)
         send_error(thd, thd->killed ? ER_SERVER_SHUTDOWN : 0);
       break;
     }

sql/sql_union.cc

@@ -147,6 +147,7 @@ int st_select_lex_unit::prepare(THD *thd_arg, select_result *sel_result,
   SELECT_LEX *lex_select_save= thd_arg->lex->current_select;
   SELECT_LEX *sl, *first_select;
   select_result *tmp_result;
+  bool is_union;
   DBUG_ENTER("st_select_lex_unit::prepare");
 
   describe= test(additional_options & SELECT_DESCRIBE);
@@ -183,10 +184,11 @@ int st_select_lex_unit::prepare(THD *thd_arg, select_result *sel_result,
   
   thd_arg->lex->current_select= sl= first_select= first_select_in_union();
   found_rows_for_union= first_select->options & OPTION_FOUND_ROWS;
+  is_union= test(first_select->next_select());
 
   /* Global option */
 
-  if (first_select->next_select())
+  if (is_union)
   {
     if (!(tmp_result= union_result= new select_union(0)))
       goto err;
@@ -195,14 +197,11 @@ int st_select_lex_unit::prepare(THD *thd_arg, select_result *sel_result,
       tmp_result= sel_result;
   }
   else
-  {
     tmp_result= sel_result;
-    // single select should be processed like select in p[arantses
-    first_select->braces= 1;
-  }
 
   for (;sl; sl= sl->next_select())
   {
+    bool can_skip_order_by;
     sl->options|=  SELECT_NO_UNLOCK;
     JOIN *join= new JOIN(thd_arg, sl->item_list, 
 			 sl->options | thd_arg->options | additional_options,
@@ -218,13 +217,16 @@ int st_select_lex_unit::prepare(THD *thd_arg, select_result *sel_result,
     if (select_limit_cnt == HA_POS_ERROR || sl->braces)
       sl->options&= ~OPTION_FOUND_ROWS;
 
+    can_skip_order_by= is_union &&
+                       (!sl->braces || select_limit_cnt == HA_POS_ERROR);
+
     res= join->prepare(&sl->ref_pointer_array,
 		       (TABLE_LIST*) sl->table_list.first, sl->with_wild,
 		       sl->where,
-		       ((sl->braces) ? sl->order_list.elements : 0) +
+                       (can_skip_order_by ? 0 : sl->order_list.elements) +
                        sl->group_list.elements,
-		       (sl->braces) ? 
-		       (ORDER *)sl->order_list.first : (ORDER *) 0,
+                       can_skip_order_by ?
+                       (ORDER*) 0 : (ORDER *)sl->order_list.first,
 		       (ORDER*) sl->group_list.first,
 		       sl->having,
 		       (ORDER*) NULL,
@@ -264,10 +266,8 @@ int st_select_lex_unit::prepare(THD *thd_arg, select_result *sel_result,
     }
   }
 
-  if (first_select->next_select())
+  if (is_union)
   {
-    /* This is not a single select */
-
     /*
       Check that it was possible to aggregate
       all collations together for UNION.
@@ -364,8 +364,6 @@ int st_select_lex_unit::prepare(THD *thd_arg, select_result *sel_result,
       }
     }
   }
-  else
-    first_select->braces= 0; // remove our changes
 
   thd_arg->lex->current_select= lex_select_save;
 

tests/client_test.c

@@ -10688,6 +10688,31 @@ static void test_bug6046()
 }
 
 
+/*
+  Altough mysql_create_db(), mysql_rm_db() are deprecated since 4.0 they
+  should not crash server and should not hang in case of errors.
+
+  Since those functions can't be seen in modern API (unless client library
+  was compiled with USE_OLD_FUNCTIONS define) we use simple_command() macro.
+*/
+static void test_bug6081()
+{
+  int rc;
+  myheader("test_bug6081");
+
+  rc= simple_command(mysql, COM_DROP_DB, current_db,
+                     (ulong)strlen(current_db), 0);
+  myquery(rc);
+  rc= simple_command(mysql, COM_DROP_DB, current_db,
+                     (ulong)strlen(current_db), 0);
+  myquery_r(rc);
+  rc= simple_command(mysql, COM_CREATE_DB, current_db,
+                     (ulong)strlen(current_db), 0);
+  myquery(rc);
+  rc= simple_command(mysql, COM_CREATE_DB, current_db,
+                     (ulong)strlen(current_db), 0);
+  myquery_r(rc);
+}
 
 
 /*
@@ -11004,6 +11029,7 @@ int main(int argc, char **argv)
     test_bug6058();         /* check support for 0000-00-00 dates */
     test_bug6059();         /* correct metadata for SELECT ... INTO OUTFILE */
     test_bug6046();         /* NATURAL JOIN transformation works in PS */
+    test_bug6081();         /* test of mysql_create_db()/mysql_rm_db() */
     /*
       XXX: PLEASE RUN THIS PROGRAM UNDER VALGRIND AND VERIFY THAT YOUR TEST
       DOESN'T CONTAIN WARNINGS/ERRORS BEFORE YOU PUSH.