Bug#27047 INFORMATION_SCHEMA table cannot have BIGINT fields

added support for DATE, TIME, BLOB, FLOAT and all *INT variants in I_S tables


sql/item.h:
  added support for DATE, TIME, BLOB, FLOAT and all *INT variants in I_S tables
sql/sp.cc:
  added support for DATE, TIME, BLOB, FLOAT and all *INT variants in I_S tables
sql/sql_show.cc:
  added support for DATE, TIME, BLOB, FLOAT and all *INT variants in I_S tables
sql/table.h:
  added MY_I_S_MAYBE_NULL & MY_I_S_UNSIGNED flags which are used as 
  field atributes for I_S schema table fields

sql/item.h

@@ -1840,33 +1840,57 @@ class Item_static_string_func :public Item_string
 
 
 /* for show tables */
-
-class Item_datetime :public Item_string
+class Item_partition_func_safe_string: public Item_string
 {
 public:
-  Item_datetime(const char *item_name): Item_string(item_name,"",0,
-                                                    &my_charset_bin)
-  { max_length=19;}
-  enum_field_types field_type() const { return MYSQL_TYPE_DATETIME; }
+  Item_partition_func_safe_string(const char *name, uint length,
+                                  CHARSET_INFO *cs= NULL):
+    Item_string(name, length, cs)
+  {}
   bool check_partition_func_processor(byte *int_arg) {return TRUE;}
 };
 
-class Item_empty_string :public Item_string
+
+class Item_return_date_time :public Item_partition_func_safe_string
+{
+  enum_field_types date_time_field_type;
+public:
+  Item_return_date_time(const char *name_arg, enum_field_types field_type_arg)
+    :Item_partition_func_safe_string(name_arg, 0, &my_charset_bin),
+     date_time_field_type(field_type_arg)
+  { }
+  enum_field_types field_type() const { return date_time_field_type; }
+};
+
+
+class Item_blob :public Item_partition_func_safe_string
+{
+public:
+  Item_blob(const char *name, uint length) :
+    Item_partition_func_safe_string(name, length, &my_charset_bin)
+  { max_length= length; }
+  enum Type type() const { return TYPE_HOLDER; }
+  enum_field_types field_type() const { return MYSQL_TYPE_BLOB; }
+};
+
+
+class Item_empty_string :public Item_partition_func_safe_string
 {
 public:
   Item_empty_string(const char *header,uint length, CHARSET_INFO *cs= NULL) :
-    Item_string("",0, cs ? cs : &my_charset_bin)
+    Item_partition_func_safe_string("",0, cs ? cs : &my_charset_bin)
     { name=(char*) header; max_length= cs ? length * cs->mbmaxlen : length; }
   void make_field(Send_field *field);
 };
 
+
 class Item_return_int :public Item_int
 {
   enum_field_types int_field_type;
 public:
   Item_return_int(const char *name_arg, uint length,
-		  enum_field_types field_type_arg)
-    :Item_int(name_arg, 0, length), int_field_type(field_type_arg)
+		  enum_field_types field_type_arg, longlong value= 0)
+    :Item_int(name_arg, value, length), int_field_type(field_type_arg)
   {
     unsigned_flag=1;
   }

sql/sp.cc

@@ -784,7 +784,9 @@ db_show_routine_status(THD *thd, int type, const char *wild)
     {
       switch (used_field->field_type) {
       case MYSQL_TYPE_TIMESTAMP:
-	field_list.push_back(item=new Item_datetime(used_field->field_name));
+	field_list.push_back(item=
+                             new Item_return_date_time(used_field->field_name,
+                                                       MYSQL_TYPE_DATETIME));
 	break;
       default:
 	field_list.push_back(item=new Item_empty_string(used_field->field_name,

sql/table.h

@@ -554,13 +554,17 @@ enum enum_schema_tables
 };
 
 
+#define MY_I_S_MAYBE_NULL 1
+#define MY_I_S_UNSIGNED   2
+
+
 typedef struct st_field_info
 {
   const char* field_name;
   uint field_length;
   enum enum_field_types field_type;
   int value;
-  bool maybe_null;
+  uint field_flags;        // Field atributes(maybe_null, signed, unsigned etc.)
   const char* old_name;
 } ST_FIELD_INFO;