Merge rurik.mysql.com:/home/igor/dev/mysql-5.0-0

into  rurik.mysql.com:/home/igor/dev/mysql-5.1-0


sql/item.cc:
  Auto merged
sql/opt_sum.cc:
  Auto merged

mysql-test/r/having.result

@@ -359,3 +359,38 @@ group by s1 collate latin1_swedish_ci having s1 = 'y';
 s1	count(s1)
 y	1
 drop table t1;
+DROP SCHEMA IF EXISTS HU;
+Warnings:
+Note	1008	Can't drop database 'HU'; database doesn't exist
+CREATE SCHEMA HU ;
+USE HU ;
+CREATE TABLE STAFF
+(EMPNUM   CHAR(3) NOT NULL UNIQUE,
+EMPNAME  CHAR(20),
+GRADE    DECIMAL(4),
+CITY     CHAR(15));
+CREATE TABLE PROJ
+(PNUM     CHAR(3) NOT NULL UNIQUE,
+PNAME    CHAR(20),
+PTYPE    CHAR(6),
+BUDGET   DECIMAL(9),
+CITY     CHAR(15));
+INSERT INTO STAFF VALUES ('E1','Alice',12,'Deale');
+INSERT INTO STAFF VALUES ('E2','Betty',10,'Vienna');
+INSERT INTO STAFF VALUES ('E3','Carmen',13,'Vienna');
+INSERT INTO STAFF VALUES ('E4','Don',12,'Deale');
+INSERT INTO STAFF VALUES ('E5','Ed',13,'Akron');
+INSERT INTO PROJ VALUES  ('P1','MXSS','Design',10000,'Deale');
+INSERT INTO PROJ VALUES  ('P2','CALM','Code',30000,'Vienna');
+INSERT INTO PROJ VALUES  ('P3','SDP','Test',30000,'Tampa');
+INSERT INTO PROJ VALUES  ('P4','SDP','Design',20000,'Deale');
+INSERT INTO PROJ VALUES  ('P5','IRM','Test',10000,'Vienna');
+INSERT INTO PROJ VALUES  ('P6','PAYR','Design',50000,'Deale');
+SELECT EMPNUM, GRADE*1000
+FROM HU.STAFF WHERE GRADE * 1000 > 
+ANY (SELECT SUM(BUDGET) FROM HU.PROJ
+GROUP BY CITY, PTYPE
+HAVING HU.PROJ.CITY = HU.STAFF.CITY);
+EMPNUM	GRADE*1000
+E3	13000
+DROP SCHEMA HU;

mysql-test/t/having.test

@@ -347,3 +347,47 @@ group by s1 collate latin1_swedish_ci having s1 = 'y';
 # MySQL returns: 1 row, with count(s1) = 1
 
 drop table t1;
+
+
+#
+# Bug #15917: unexpected complain for a name in having clause
+# when the server is run on Windows or with --lower-case-table-names=1
+#
+
+DROP SCHEMA IF EXISTS HU;
+CREATE SCHEMA HU ;
+USE HU ;
+
+CREATE TABLE STAFF
+ (EMPNUM   CHAR(3) NOT NULL UNIQUE,
+  EMPNAME  CHAR(20),
+  GRADE    DECIMAL(4),
+  CITY     CHAR(15));
+
+CREATE TABLE PROJ
+ (PNUM     CHAR(3) NOT NULL UNIQUE,
+  PNAME    CHAR(20),
+  PTYPE    CHAR(6),
+  BUDGET   DECIMAL(9),
+  CITY     CHAR(15));
+
+INSERT INTO STAFF VALUES ('E1','Alice',12,'Deale');
+INSERT INTO STAFF VALUES ('E2','Betty',10,'Vienna');
+INSERT INTO STAFF VALUES ('E3','Carmen',13,'Vienna');
+INSERT INTO STAFF VALUES ('E4','Don',12,'Deale');
+INSERT INTO STAFF VALUES ('E5','Ed',13,'Akron');
+
+INSERT INTO PROJ VALUES  ('P1','MXSS','Design',10000,'Deale');
+INSERT INTO PROJ VALUES  ('P2','CALM','Code',30000,'Vienna');
+INSERT INTO PROJ VALUES  ('P3','SDP','Test',30000,'Tampa');
+INSERT INTO PROJ VALUES  ('P4','SDP','Design',20000,'Deale');
+INSERT INTO PROJ VALUES  ('P5','IRM','Test',10000,'Vienna');
+INSERT INTO PROJ VALUES  ('P6','PAYR','Design',50000,'Deale');
+
+SELECT EMPNUM, GRADE*1000
+  FROM HU.STAFF WHERE GRADE * 1000 > 
+                  ANY (SELECT SUM(BUDGET) FROM HU.PROJ
+                         GROUP BY CITY, PTYPE
+                           HAVING HU.PROJ.CITY = HU.STAFF.CITY);
+
+DROP SCHEMA HU;

sql/item.cc

@@ -3061,6 +3061,7 @@ static Item** find_field_in_group_list(Item *find_item, ORDER *group_list)
   int         found_match_degree= 0;
   Item_ident *cur_field;
   int         cur_match_degree= 0;
+  char        name_buff[NAME_LEN+1];
 
   if (find_item->type() == Item::FIELD_ITEM ||
       find_item->type() == Item::REF_ITEM)
@@ -3072,6 +3073,14 @@ static Item** find_field_in_group_list(Item *find_item, ORDER *group_list)
   else
     return NULL;
 
+  if (db_name && lower_case_table_names)
+  {
+    /* Convert database to lower case for comparison */
+    strmake(name_buff, db_name, sizeof(name_buff)-1);
+    my_casedn_str(files_charset_info, name_buff);
+    db_name= name_buff;
+  }
+
   DBUG_ASSERT(field_name != 0);
 
   for (ORDER *cur_group= group_list ; cur_group ; cur_group= cur_group->next)

sql/opt_sum.cc

@@ -123,8 +123,11 @@ int opt_sum_query(TABLE_LIST *tables, List<Item> &all_fields,COND *conds)
       If the storage manager of 'tl' gives exact row count, compute the total
       number of rows. If there are no outer table dependencies, this count
       may be used as the real count.
+      Schema tables are filled after this function is invoked, so we can't
+      get row count 
     */
-    if (tl->table->file->table_flags() & HA_NOT_EXACT_COUNT)
+    if ((tl->table->file->table_flags() & HA_NOT_EXACT_COUNT) ||
+        tl->schema_table)
     {
       is_exact_count= FALSE;
       count= 1;                                 // ensure count != 0
@@ -149,32 +152,16 @@ int opt_sum_query(TABLE_LIST *tables, List<Item> &all_fields,COND *conds)
       switch (item_sum->sum_func()) {
       case Item_sum::COUNT_FUNC:
         /*
-          If the expr in count(expr) can never be null we can change this
+          If the expr in COUNT(expr) can never be null we can change this
           to the number of rows in the tables if this number is exact and
           there are no outer joins.
         */
         if (!conds && !((Item_sum_count*) item)->args[0]->maybe_null &&
             !outer_tables && is_exact_count)
-        {
-          longlong count= 1;
-          TABLE_LIST *table;
-          for (table= tables; table; table= table->next_leaf)
-          {
-            if (outer_tables || (table->table->file->table_flags() &
-                                 HA_NOT_EXACT_COUNT) || table->schema_table)
-            {
-              const_result= 0;			// Can't optimize left join
-              break;
-            }
-            tables->table->file->info(HA_STATUS_VARIABLE | HA_STATUS_NO_LOCK);
-            count*= table->table->file->records;
-          }
-          if (!table)
         {
           ((Item_sum_count*) item)->make_const(count);
           recalc_const_item= 1;
         }
-        }
         else
           const_result= 0;
         break;