Merge bk-internal.mysql.com:/data0/bk/mysql-5.0

into  bk-internal.mysql.com:/users/gshchepa/mysql-5.0-opt


sql/sql_base.cc:
  Auto merged
sql/sql_cache.cc:
  Auto merged

mysql-test/r/handler.result

@@ -482,3 +482,10 @@ ERROR 42S02: Table 'test.t1' doesn't exist
 drop table if exists t1;
 Warnings:
 Note	1051	Unknown table 't1'
+drop table if exists t1;
+create table t1 (a int) ENGINE=MEMORY;
+--> client 2
+handler t1 open;
+ERROR HY000: Table storage engine for 't1' doesn't have this option
+--> client 1
+drop table t1;

mysql-test/r/query_cache.result

@@ -1621,6 +1621,35 @@ a	(select count(*) from t2)
 3	0
 4	0
 drop table t1,t2;
+DROP DATABASE IF EXISTS bug30269;
+FLUSH STATUS;
+CREATE DATABASE bug30269;
+USE bug30269;
+CREATE TABLE test1 (id int, name varchar(23));
+CREATE VIEW view1 AS SELECT * FROM test1;
+INSERT INTO test1 VALUES (5, 'testit');
+GRANT SELECT (id) ON TABLE bug30269.test1 TO 'bug30269'@'localhost';
+GRANT SELECT ON TABLE bug30269.view1 TO 'bug30269'@'localhost';
+set global query_cache_size= 81920;
+USE bug30269;
+show status like 'Qcache_queries_in_cache';
+Variable_name	Value
+Qcache_queries_in_cache	0
+# Select statement not stored in query cache because of column privileges.
+SELECT id FROM test1 WHERE id>2;
+id
+5
+show status like 'Qcache_queries_in_cache';
+Variable_name	Value
+Qcache_queries_in_cache	0
+SELECT id FROM view1 WHERE id>2;
+id
+5
+show status like 'Qcache_queries_in_cache';
+Variable_name	Value
+Qcache_queries_in_cache	1
+DROP DATABASE bug30269;
+DROP USER 'bug30269'@'localhost';
 set GLOBAL query_cache_type=default;
 set GLOBAL query_cache_limit=default;
 set GLOBAL query_cache_min_res_unit=default;

mysql-test/t/handler.test

@@ -427,3 +427,17 @@ select * from t1;
 # Just to be sure and not confuse the next test case writer.
 drop table if exists t1;
 
+#
+# Bug#25856 - HANDLER table OPEN in one connection lock DROP TABLE in another one
+#
+--disable_warnings
+drop table if exists t1;
+--enable_warnings
+create table t1 (a int) ENGINE=MEMORY;
+--echo --> client 2
+connection con2;
+--error 1031
+handler t1 open;
+--echo --> client 1
+connection default;
+drop table t1;

mysql-test/t/query_cache.test

@@ -1220,9 +1220,40 @@ connection default;
 disconnect user1;
 disconnect user2;
 disconnect user3;
+
+#
+# Bug #30269 Query cache eats memory
+#
+--disable_warnings
+DROP DATABASE IF EXISTS bug30269;
+--enable_warnings
+FLUSH STATUS;
+CREATE DATABASE bug30269;
+USE bug30269;
+CREATE TABLE test1 (id int, name varchar(23));
+CREATE VIEW view1 AS SELECT * FROM test1;
+INSERT INTO test1 VALUES (5, 'testit');
+GRANT SELECT (id) ON TABLE bug30269.test1 TO 'bug30269'@'localhost';
+GRANT SELECT ON TABLE bug30269.view1 TO 'bug30269'@'localhost';
+set global query_cache_size= 81920;
+connect (bug30269, localhost, bug30269,,);
+connection bug30269;
+USE bug30269;
+show status like 'Qcache_queries_in_cache';
+--echo # Select statement not stored in query cache because of column privileges.
+SELECT id FROM test1 WHERE id>2;
+show status like 'Qcache_queries_in_cache';
+SELECT id FROM view1 WHERE id>2;
+show status like 'Qcache_queries_in_cache';
+
+connection default;
+DROP DATABASE bug30269;
+disconnect bug30269;
+DROP USER 'bug30269'@'localhost';
+
 set GLOBAL query_cache_type=default;
 set GLOBAL query_cache_limit=default;
 set GLOBAL query_cache_min_res_unit=default;
 set GLOBAL query_cache_size=default;
-# End of 5.0 tests
 
+# End of 5.0 tests

sql/lock.cc

@@ -730,6 +730,7 @@ static MYSQL_LOCK *get_lock_data(THD *thd, TABLE **table_ptr, uint count,
     if ((table=table_ptr[i])->s->tmp_table == NON_TRANSACTIONAL_TMP_TABLE)
       continue;
     lock_type= table->reginfo.lock_type;
+    DBUG_ASSERT (lock_type != TL_WRITE_DEFAULT);
     if (lock_type >= TL_WRITE_ALLOW_WRITE)
     {
       *write_lock_used=table;

sql/sql_base.cc

@@ -1529,7 +1529,6 @@ TABLE *open_table(THD *thd, TABLE_LIST *table_list, MEM_ROOT *mem_root,
   HASH_SEARCH_STATE state;
   DBUG_ENTER("open_table");
 
-  DBUG_ASSERT (table_list->lock_type != TL_WRITE_DEFAULT);
   /* find a unused table in the open table cache */
   if (refresh)
     *refresh=0;
@@ -2700,11 +2699,6 @@ int open_tables(THD *thd, TABLE_LIST **start, uint *counter, uint flags)
   {
     safe_to_ignore_table= FALSE;
 
-    if (tables->lock_type == TL_WRITE_DEFAULT)
-    {
-      tables->lock_type= thd->update_lock_default;
-      DBUG_ASSERT (tables->lock_type >= TL_WRITE_ALLOW_WRITE);
-    }
     /*
       Ignore placeholders for derived tables. After derived tables
       processing, link to created temporary table will be put here.
@@ -2849,7 +2843,8 @@ int open_tables(THD *thd, TABLE_LIST **start, uint *counter, uint flags)
     }
 
     if (tables->lock_type != TL_UNLOCK && ! thd->locked_tables)
-      tables->table->reginfo.lock_type=tables->lock_type;
+      tables->table->reginfo.lock_type= tables->lock_type == TL_WRITE_DEFAULT ?
+        thd->update_lock_default : tables->lock_type;
     tables->table->grant= tables->grant;
 
 process_view_routines:

sql/sql_cache.cc

@@ -3000,14 +3000,42 @@ void Query_cache::double_linked_list_join(Query_cache_block *head_tail,
     >0  number of tables
 */
 
-static TABLE_COUNTER_TYPE process_and_count_tables(TABLE_LIST *tables_used,
-                                                   uint8 *tables_type)
+TABLE_COUNTER_TYPE
+Query_cache::process_and_count_tables(THD *thd, TABLE_LIST *tables_used,
+                                      uint8 *tables_type)
 {
   DBUG_ENTER("process_and_count_tables");
   TABLE_COUNTER_TYPE table_count = 0;
   for (; tables_used; tables_used= tables_used->next_global)
   {
     table_count++;
+#ifdef HAVE_QUERY_CACHE
+    /*
+      Disable any attempt to store this statement if there are
+      column level grants on any referenced tables.
+      The grant.want_privileges flag was set to 1 in the
+      check_grant() function earlier if the TABLE_LIST object
+      had any associated column privileges.
+
+      We need to check that the TABLE_LIST object isn't part
+      of a VIEW definition because we want to be able to cache
+      views.
+
+      TODO: Although it is possible to cache views, the privilege
+      check on view tables always fall back on column privileges
+      even if there are more generic table privileges. Thus it isn't
+      currently possible to retrieve cached view-tables unless the
+      client has the super user privileges.
+    */
+    if (tables_used->grant.want_privilege &&
+        tables_used->belong_to_view == NULL)
+    {
+      DBUG_PRINT("qcache", ("Don't cache statement as it refers to "
+                            "tables with column privileges."));
+      thd->lex->safe_to_cache_query= 0;
+      DBUG_RETURN(0);
+    }
+#endif
     if (tables_used->view)
     {
       DBUG_PRINT("qcache", ("view: %s  db: %s",
@@ -3080,7 +3108,8 @@ Query_cache::is_cacheable(THD *thd, uint32 query_len, char *query, LEX *lex,
                           (long) lex->select_lex.options,
                           (int) thd->variables.query_cache_type));
 
-    if (!(table_count= process_and_count_tables(tables_used, tables_type)))
+    if (!(table_count= process_and_count_tables(thd, tables_used,
+                                                tables_type)))
       DBUG_RETURN(0);
 
     if ((thd->options & (OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN)) &&

sql/sql_cache.h

@@ -368,10 +368,12 @@ protected:
     If query is cacheable return number tables in query
     (query without tables not cached)
   */
-  static
   TABLE_COUNTER_TYPE is_cacheable(THD *thd, uint32 query_len, char *query,
-				  LEX *lex, TABLE_LIST *tables_used,
-				  uint8 *tables_type);
+                                  LEX *lex, TABLE_LIST *tables_used,
+                                  uint8 *tables_type);
+  TABLE_COUNTER_TYPE process_and_count_tables(THD *thd,
+                                              TABLE_LIST *tables_used,
+                                              uint8 *tables_type);
 
   static my_bool ask_handler_allowance(THD *thd, TABLE_LIST *tables_used);
  public:

sql/sql_handler.cc

@@ -119,6 +119,44 @@ static void mysql_ha_hash_free(TABLE_LIST *tables)
   my_free((char*) tables, MYF(0));
 }
 
+/**
+  Close a HANDLER table.
+
+  @param thd Thread identifier.
+  @param tables A list of tables with the first entry to close.
+
+  @note Though this function takes a list of tables, only the first list entry
+  will be closed.
+  @note Broadcasts refresh if it closed the table.
+*/
+
+static void mysql_ha_close_table(THD *thd, TABLE_LIST *tables)
+{
+  TABLE **table_ptr;
+
+  /*
+    Though we could take the table pointer from hash_tables->table,
+    we must follow the thd->handler_tables chain anyway, as we need the
+    address of the 'next' pointer referencing this table
+    for close_thread_table().
+  */
+  for (table_ptr= &(thd->handler_tables);
+       *table_ptr && (*table_ptr != tables->table);
+         table_ptr= &(*table_ptr)->next)
+    ;
+
+  if (*table_ptr)
+  {
+    (*table_ptr)->file->ha_index_or_rnd_end();
+    VOID(pthread_mutex_lock(&LOCK_open));
+    if (close_thread_table(thd, table_ptr))
+    {
+      /* Tell threads waiting for refresh that something has happened */
+      broadcast_refresh();
+    }
+    VOID(pthread_mutex_unlock(&LOCK_open));
+  }
+}
 
 /*
   Open a HANDLER table.
@@ -145,7 +183,7 @@ static void mysql_ha_hash_free(TABLE_LIST *tables)
 
 bool mysql_ha_open(THD *thd, TABLE_LIST *tables, bool reopen)
 {
-  TABLE_LIST    *hash_tables;
+  TABLE_LIST    *hash_tables = NULL;
   char          *db, *name, *alias;
   uint          dblen, namelen, aliaslen, counter;
   int           error;
@@ -197,7 +235,6 @@ bool mysql_ha_open(THD *thd, TABLE_LIST *tables, bool reopen)
   {
     if (! reopen)
       my_error(ER_ILLEGAL_HA, MYF(0), tables->alias);
-    mysql_ha_close(thd, tables);
     goto err;
   }
 
@@ -225,11 +262,7 @@ bool mysql_ha_open(THD *thd, TABLE_LIST *tables, bool reopen)
 
     /* add to hash */
     if (my_hash_insert(&thd->handler_tables_hash, (byte*) hash_tables))
-    {
-      my_free((char*) hash_tables, MYF(0));
-      mysql_ha_close(thd, tables);
       goto err;
-    }
   }
 
   if (! reopen)
@@ -238,13 +271,17 @@ bool mysql_ha_open(THD *thd, TABLE_LIST *tables, bool reopen)
   DBUG_RETURN(FALSE);
 
 err:
+  if (hash_tables)
+    my_free((char*) hash_tables, MYF(0));
+  if (tables->table)
+    mysql_ha_close_table(thd, tables);
   DBUG_PRINT("exit",("ERROR"));
   DBUG_RETURN(TRUE);
 }
 
 
 /*
-  Close a HANDLER table.
+  Close a HANDLER table by alias or table name
 
   SYNOPSIS
     mysql_ha_close()
@@ -252,9 +289,8 @@ err:
     tables                      A list of tables with the first entry to close.
 
   DESCRIPTION
-    Though this function takes a list of tables, only the first list entry
-    will be closed.
-    Broadcasts refresh if it closed the table.
+    Closes the table that is associated (on the handler tables hash) with the
+    name (table->alias) of the specified table.
 
   RETURN
     FALSE ok
@@ -264,7 +300,6 @@ err:
 bool mysql_ha_close(THD *thd, TABLE_LIST *tables)
 {
   TABLE_LIST    *hash_tables;
-  TABLE         **table_ptr;
   DBUG_ENTER("mysql_ha_close");
   DBUG_PRINT("enter",("'%s'.'%s' as '%s'",
                       tables->db, tables->table_name, tables->alias));
@@ -273,28 +308,7 @@ bool mysql_ha_close(THD *thd, TABLE_LIST *tables)
                                               (byte*) tables->alias,
                                               strlen(tables->alias) + 1)))
   {
-    /*
-      Though we could take the table pointer from hash_tables->table,
-      we must follow the thd->handler_tables chain anyway, as we need the
-      address of the 'next' pointer referencing this table
-      for close_thread_table().
-    */
-    for (table_ptr= &(thd->handler_tables);
-         *table_ptr && (*table_ptr != hash_tables->table);
-           table_ptr= &(*table_ptr)->next)
-      ;
-
-    if (*table_ptr)
-    {
-      (*table_ptr)->file->ha_index_or_rnd_end();
-      VOID(pthread_mutex_lock(&LOCK_open));
-      if (close_thread_table(thd, table_ptr))
-      {
-        /* Tell threads waiting for refresh that something has happened */
-        broadcast_refresh();
-      }
-      VOID(pthread_mutex_unlock(&LOCK_open));
-    }
+    mysql_ha_close_table(thd, hash_tables);
     hash_delete(&thd->handler_tables_hash, (byte*) hash_tables);
   }
   else