item_cmpfunc.cc, type_datetime.result, type_datetime.test, item_cmpfunc.h:

  After merge fix.

mysql-test/r/type_datetime.result

@@ -328,8 +328,8 @@ least(cast('01-01-01' as datetime), '01-01-02') + 0
 select cast(least(cast('01-01-01' as datetime), '01-01-02') as signed);
 cast(least(cast('01-01-01' as datetime), '01-01-02') as signed)
 20010101000000
-select cast(least(cast('01-01-01' as datetime), '01-01-02') as decimal);
-cast(least(cast('01-01-01' as datetime), '01-01-02') as decimal)
+select cast(least(cast('01-01-01' as datetime), '01-01-02') as decimal(16,2));
+cast(least(cast('01-01-01' as datetime), '01-01-02') as decimal(16,2))
 20010101000000.00
 DROP PROCEDURE IF EXISTS test27759 ;
 CREATE PROCEDURE test27759()

mysql-test/t/type_datetime.test

@@ -207,7 +207,7 @@ select least(cast('01-01-01' as date), '01-01-02') + 0;
 select greatest(cast('01-01-01' as date), '01-01-02') + 0;
 select least(cast('01-01-01' as datetime), '01-01-02') + 0;
 select cast(least(cast('01-01-01' as datetime), '01-01-02') as signed);
-select cast(least(cast('01-01-01' as datetime), '01-01-02') as decimal);
+select cast(least(cast('01-01-01' as datetime), '01-01-02') as decimal(16,2));
 --disable_warnings
 DROP PROCEDURE IF EXISTS test27759 ;
 --enable_warnings

sql/item_cmpfunc.cc

@@ -3238,6 +3238,12 @@ void Item_func_in::fix_length_and_dec()
   /* TRUE <=> arguments values will be compared as DATETIMEs. */
   bool compare_as_datetime= FALSE;
   Item *date_arg= 0;
+  uint found_types= 0;
+  uint type_cnt= 0, i;
+  Item_result cmp_type= STRING_RESULT;
+  left_result_type= args[0]->result_type();
+  if (!(found_types= collect_cmp_types(args, arg_count)))
+    return;
   
   for (arg= args + 1, arg_end= args + arg_count; arg != arg_end ; arg++)
   {
@@ -3247,6 +3253,24 @@ void Item_func_in::fix_length_and_dec()
       break;
     }
   }
+  for (i= 0; i <= (uint)DECIMAL_RESULT; i++)
+  {
+    if (found_types & 1 << i)
+    {
+      (type_cnt)++;
+      cmp_type= (Item_result) i;
+    }
+  }
+
+  if (type_cnt == 1)
+  {
+    if (cmp_type == STRING_RESULT && 
+        agg_arg_charsets(cmp_collation, args, arg_count, MY_COLL_CMP_CONV, 1))
+      return;
+    arg_types_compatible= TRUE;
+  }
+  if (type_cnt == 1)
+  {
     /*
       When comparing rows create the row comparator object beforehand to ease
       the DATETIME comparison detection procedure.
@@ -3263,7 +3287,7 @@ void Item_func_in::fix_length_and_dec()
       {
         if (!(cmp= new cmp_item_row))
           return;
-      in_item= cmp;
+        cmp_items[ROW_RESULT]= cmp;
       }
       cmp->n= args[0]->cols();
       cmp->alloc_comparators();
@@ -3317,7 +3341,7 @@ void Item_func_in::fix_length_and_dec()
             if (array)
               cmp= ((in_row*)array)->tmp.comparators + col;
             else
-            cmp= ((cmp_item_row*)in_item)->comparators + col;
+              cmp= ((cmp_item_row*)cmp_items[ROW_RESULT])->comparators + col;
             *cmp= new cmp_item_datetime(date_arg);
             /* Reset variables for the next column. */
             date_arg= 0;
@@ -3328,23 +3352,7 @@ void Item_func_in::fix_length_and_dec()
         }
       }
     }
-  for (i= 0; i <= (uint)DECIMAL_RESULT; i++)
-  {
-    if (found_types & 1 << i)
-    {
-      (type_cnt)++;
-      cmp_type= (Item_result) i;
-    }
-  }
-
-  if (type_cnt == 1)
-  {
-    if (cmp_type == STRING_RESULT && 
-        agg_arg_charsets(cmp_collation, args, arg_count, MY_COLL_CMP_CONV, 1))
-      return;
-    arg_types_compatible= TRUE;
   }
-
   /*
     Row item with NULLs inside can return NULL or FALSE =>
     they can't be processed as static
@@ -3424,17 +3432,8 @@ void Item_func_in::fix_length_and_dec()
   }
   else
   {
-    if (in_item)
-    {
-      /*
-        The row comparator was created at the beginning but only DATETIME
-        items comparators were initialized. Call store_value() to setup
-        others.
-      */
-      in_item->store_value(args[0]);
-    }
-    else if (compare_as_datetime)
-      in_item= new cmp_item_datetime(date_arg);
+    if (compare_as_datetime)
+      cmp_items[STRING_RESULT]= new cmp_item_datetime(date_arg);
     else
     {
       for (i= 0; i <= (uint) DECIMAL_RESULT; i++)
@@ -3442,9 +3441,10 @@ void Item_func_in::fix_length_and_dec()
         if (found_types & (1 << i) && !cmp_items[i])
         {
           if ((Item_result)i == STRING_RESULT &&
-            agg_arg_charsets(cmp_collation, args, arg_count, MY_COLL_CMP_CONV, 1))
+              agg_arg_charsets(cmp_collation, args, arg_count,
+                               MY_COLL_CMP_CONV, 1))
             return;
-        if (!(cmp_items[i]=
+          if (!cmp_items[i] && !(cmp_items[i]=
               cmp_item::get_comparator((Item_result)i,
                                        cmp_collation.collation)))
             return;

sql/item_cmpfunc.h

@@ -1186,7 +1186,7 @@ public:
   */
   bool arg_types_compatible;
   Item_result left_result_type;
-  cmp_item *cmp_items[5]; /* One cmp_item for each result type */
+  cmp_item *cmp_items[6]; /* One cmp_item for each result type */
   DTCollation cmp_collation;
 
   Item_func_in(List<Item> &list)
@@ -1207,7 +1207,7 @@ public:
     Item_int_func::cleanup();
     delete array;
     array= 0;
-    for (i= 0; i <= (uint)DECIMAL_RESULT; i++)
+    for (i= 0; i <= (uint)DECIMAL_RESULT + 1; i++)
     {
       delete cmp_items[i];
       cmp_items[i]= 0;
@@ -1251,35 +1251,7 @@ public:
   void set(uint pos,Item *item);
   byte *get_value(Item *item);
   friend void Item_func_in::fix_length_and_dec();
-  Item_resul result_type() { return ROW_RESULT; };
-};
-
-class cmp_item_row :public cmp_item
-{
-  cmp_item **comparators;
-  uint n;
-public:
-  cmp_item_row(): comparators(0), n(0) {}
-  ~cmp_item_row();
-  void store_value(Item *item);
-  inline void alloc_comparators();
-  int cmp(Item *arg);
-  int compare(cmp_item *arg);
-  cmp_item *make_same();
-  void store_value_by_template(cmp_item *tmpl, Item *);
-  friend void Item_func_in::fix_length_and_dec();
-};
-
-
-class in_row :public in_vector
-{
-  cmp_item_row tmp;
-public:
-  in_row(uint elements, Item *);
-  ~in_row();
-  void set(uint pos,Item *item);
-  byte *get_value(Item *item);
-  friend void Item_func_in::fix_length_and_dec();
+  Item_result result_type() { return ROW_RESULT; };
 };
 
 /* Functions used by where clause */