merge with 3.23 to get:

- Fix for empty table/column names

mysql-test/t/create.test

@@ -55,6 +55,14 @@ create table test_$1.test2$ (a int);
 drop table test_$1.test2$;
 drop database test_$1;
 
+--error 1103
+create table `` (a int);
+--error 1103
+drop table if exists ``;
+--error 1166
+create table t1 (`` int);
+drop table if exists t1;
+
 #
 # Test of CREATE ... SELECT with indexes
 #

sql/filesort.cc

@@ -68,7 +68,7 @@ ha_rows filesort(TABLE *table, SORT_FIELD *sortorder, uint s_length,
 		 ha_rows *examined_rows)
 {
   int error;
-  ulong memavl;
+  ulong memavl, min_sort_memory;
   uint maxbuffer;
   BUFFPEK *buffpek;
   ha_rows records;
@@ -137,7 +137,8 @@ ha_rows filesort(TABLE *table, SORT_FIELD *sortorder, uint s_length,
 #endif
 
   memavl= thd->variables.sortbuff_size;
-  while (memavl >= MIN_SORT_MEMORY)
+  min_sort_memory= max(MIN_SORT_MEMORY, param.sort_length*MERGEBUFF2);
+  while (memavl >= min_sort_memory)
   {
     ulong old_memavl;
     ulong keys= memavl/(param.sort_length+sizeof(char*));
@@ -146,15 +147,10 @@ ha_rows filesort(TABLE *table, SORT_FIELD *sortorder, uint s_length,
 					       MYF(0))))
       break;
     old_memavl=memavl;
-    if ((memavl=memavl/4*3) < MIN_SORT_MEMORY && old_memavl > MIN_SORT_MEMORY)
-      memavl=MIN_SORT_MEMORY;
+    if ((memavl=memavl/4*3) < min_sort_memory && old_memavl > min_sort_memory)
+      memavl= min_sort_memory;
   }
-  if (memavl < param.sort_length*MERGEBUFF2)
-  {
-    my_error(ER_OUT_OF_SORTMEMORY,MYF(0));
-    goto err;
-  }
-  if (memavl < MIN_SORT_MEMORY)
+  if (memavl < min_sort_memory)
   {
     my_error(ER_OUTOFMEMORY,MYF(ME_ERROR+ME_WAITTANG),
 	     thd->variables.sortbuff_size);

sql/sql_parse.cc

@@ -3218,8 +3218,7 @@ TABLE_LIST *add_table_to_list(Table_ident *table, LEX_STRING *alias,
   if (!table)
     DBUG_RETURN(0);				// End of memory
   alias_str= alias ? alias->str : table->table.str;
-  if (table->table.length > NAME_LEN ||
-      check_table_name(table->table.str,table->table.length) ||
+  if (check_table_name(table->table.str,table->table.length) ||
       table->db.str && check_db_name(table->db.str))
   {
     net_printf(&thd->net,ER_WRONG_TABLE_NAME,table->table.str);

sql/sql_table.cc

@@ -394,6 +394,11 @@ int mysql_create_table(THD *thd,const char *db, const char *table_name,
     }
     if (!(sql_field->flags & NOT_NULL_FLAG))
       null_fields++;
+    if (check_column_name(sql_field->field_name))
+    {
+      my_error(ER_WRONG_COLUMN_NAME, MYF(0), sql_field->field_name);
+      DBUG_RETURN(-1);
+    }
     while ((dup_field=it2++) != sql_field)
     {
       if (my_strcasecmp(sql_field->field_name, dup_field->field_name) == 0)
@@ -830,12 +835,6 @@ TABLE *create_table_from_items(THD *thd, HA_CREATE_INFO *create_info,
   while ((item=it++))
   {
     create_field *cr_field;
-    if (strlen(item->name) > NAME_LEN ||
-	check_column_name(item->name))
-    {
-      my_error(ER_WRONG_COLUMN_NAME,MYF(0),item->name);
-      DBUG_RETURN(0);
-    }
     Field *field;
     if (item->type() == Item::FUNC_ITEM)
       field=item->tmp_table_field(&tmp_table);

sql/table.cc

@@ -1164,6 +1164,8 @@ bool check_db_name(char *name)
 bool check_table_name(const char *name, uint length)
 {
   const char *end= name+length;
+  if (!length || length > NAME_LEN)
+    return 1;
 
   while (name != end)
   {
@@ -1187,6 +1189,8 @@ bool check_table_name(const char *name, uint length)
 
 bool check_column_name(const char *name)
 {
+  const char *start= name;
+
   while (*name)
   {
 #if defined(USE_MB) && defined(USE_MB_IDENT)
@@ -1204,7 +1208,8 @@ bool check_column_name(const char *name)
       return 1;
     name++;
   }
-  return 0;
+  /* Error if empty or too long column name */
+  return (name == start || (uint) (name - start) > NAME_LEN);
 }
 
 /*

tests/grant.pl

@@ -210,6 +210,16 @@ user_query("delete from $opt_database.test where a=1",1);
 user_query("update $opt_database.test set b=3 where b=1",1);
 user_query("update $opt_database.test set b=b+1",1);
 
+#
+# Test global SELECT privilege combined with table level privileges
+#
+
+safe_query("grant SELECT on *.* to $user");
+user_connect(0);
+user_query("update $opt_database.test set b=b+1");
+safe_query("revoke SELECT on *.* from $user");
+user_connect(0);
+
 # Add one privilege at a time until the user has all privileges
 user_query("select * from test",1);
 safe_query("grant select on $opt_database.test to $user");

tests/grant.res

@@ -195,7 +195,12 @@ update grant_test.test set b=3 where b=1
 Error in execute: SELECT command denied to user: 'grant_user@localhost' for column 'b' in table 'test'
 update grant_test.test set b=b+1
 Error in execute: SELECT command denied to user: 'grant_user@localhost' for column 'b' in table 'test'
-select * from test
+grant SELECT on *.* to grant_user@localhost
+Connecting grant_user
+update grant_test.test set b=b+1
+revoke SELECT on *.* from grant_user@localhost
+Connecting grant_user
+lect * from test
 Error in execute: select command denied to user: 'grant_user@localhost' for table 'test'
 grant select on grant_test.test to grant_user@localhost
 delete from grant_test.test where a=1