A cleanup for MDEV-12619 UNION creates excessive integer column types for integer literals

Fixing result set metadata for Item_int to match type_handler(),
i.e. MYSQL_TYPE_LONG for small numbers and MYSQL_TYPE_LONGLONG for big numbers.

mysql-test/r/metadata.result

 drop table if exists t1,t2;
 select 1, 1.0, -1, "hello", NULL;
 Catalog	Database	Table	Table_alias	Column	Column_alias	Type	Length	Max length	Is_null	Flags	Decimals	Charsetnr
-def					1	8	1	1	N	32897	0	63
+def					1	3	1	1	N	32897	0	63
 def					1.0	246	4	3	N	32897	1	63
-def					-1	8	2	2	N	32897	0	63
+def					-1	3	2	2	N	32897	0	63
 def					hello	253	5	5	N	1	39	8
 def					NULL	6	0	0	Y	32896	0	63
 1	1.0	-1	hello	NULL
 1	1.0	-1	hello	NULL
+SELECT
+1 AS c1,
+11 AS c2,
+111 AS c3,
+1111 AS c4,
+11111 AS c5,
+111111 AS c6,
+1111111 AS c7,
+11111111 AS c8,
+111111111 AS c9,
+1111111111 AS c10,
+11111111111 AS c11,
+111111111111 AS c12,
+1111111111111 AS c13,
+11111111111111 AS c14,
+111111111111111 AS c15,
+1111111111111111 AS c16,
+11111111111111111 AS c17,
+111111111111111111 AS c18,
+1111111111111111111 AS c19,
+11111111111111111111 AS c20,
+111111111111111111111 AS c21;
+Catalog	Database	Table	Table_alias	Column	Column_alias	Type	Length	Max length	Is_null	Flags	Decimals	Charsetnr
+def					c1	3	1	1	N	32897	0	63
+def					c2	3	2	2	N	32897	0	63
+def					c3	3	3	3	N	32897	0	63
+def					c4	3	4	4	N	32897	0	63
+def					c5	3	5	5	N	32897	0	63
+def					c6	3	6	6	N	32897	0	63
+def					c7	3	7	7	N	32897	0	63
+def					c8	3	8	8	N	32897	0	63
+def					c9	3	9	9	N	32897	0	63
+def					c10	8	10	10	N	32897	0	63
+def					c11	8	11	11	N	32897	0	63
+def					c12	8	12	12	N	32897	0	63
+def					c13	8	13	13	N	32897	0	63
+def					c14	8	14	14	N	32897	0	63
+def					c15	8	15	15	N	32897	0	63
+def					c16	8	16	16	N	32897	0	63
+def					c17	8	17	17	N	32897	0	63
+def					c18	8	18	18	N	32897	0	63
+def					c19	8	19	19	N	32897	0	63
+def					c20	8	20	20	N	32929	0	63
+def					c21	246	22	21	N	32897	0	63
+c1	c2	c3	c4	c5	c6	c7	c8	c9	c10	c11	c12	c13	c14	c15	c16	c17	c18	c19	c20	c21
+1	11	111	1111	11111	111111	1111111	11111111	111111111	1111111111	11111111111	111111111111	1111111111111	11111111111111	111111111111111	1111111111111111	11111111111111111	111111111111111111	1111111111111111111	11111111111111111111	111111111111111111111
+SELECT
+-1 AS c1,
+-11 AS c2,
+-111 AS c3,
+-1111 AS c4,
+-11111 AS c5,
+-111111 AS c6,
+-1111111 AS c7,
+-11111111 AS c8,
+-111111111 AS c9,
+-1111111111 AS c10,
+-11111111111 AS c11,
+-111111111111 AS c12,
+-1111111111111 AS c13,
+-11111111111111 AS c14,
+-111111111111111 AS c15,
+-1111111111111111 AS c16,
+-11111111111111111 AS c17,
+-111111111111111111 AS c18,
+-1111111111111111111 AS c19,
+-11111111111111111111 AS c20,
+-111111111111111111111 AS c21;
+Catalog	Database	Table	Table_alias	Column	Column_alias	Type	Length	Max length	Is_null	Flags	Decimals	Charsetnr
+def					c1	3	2	2	N	32897	0	63
+def					c2	3	3	3	N	32897	0	63
+def					c3	3	4	4	N	32897	0	63
+def					c4	3	5	5	N	32897	0	63
+def					c5	3	6	6	N	32897	0	63
+def					c6	3	7	7	N	32897	0	63
+def					c7	3	8	8	N	32897	0	63
+def					c8	3	9	9	N	32897	0	63
+def					c9	8	10	10	N	32897	0	63
+def					c10	8	11	11	N	32897	0	63
+def					c11	8	12	12	N	32897	0	63
+def					c12	8	13	13	N	32897	0	63
+def					c13	8	14	14	N	32897	0	63
+def					c14	8	15	15	N	32897	0	63
+def					c15	8	16	16	N	32897	0	63
+def					c16	8	17	17	N	32897	0	63
+def					c17	8	18	18	N	32897	0	63
+def					c18	8	19	19	N	32897	0	63
+def					c19	8	20	20	N	32897	0	63
+def					c20	246	21	21	N	32897	0	63
+def					c21	246	22	22	N	32897	0	63
+c1	c2	c3	c4	c5	c6	c7	c8	c9	c10	c11	c12	c13	c14	c15	c16	c17	c18	c19	c20	c21
+-1	-11	-111	-1111	-11111	-111111	-1111111	-11111111	-111111111	-1111111111	-11111111111	-111111111111	-1111111111111	-11111111111111	-111111111111111	-1111111111111111	-11111111111111111	-111111111111111111	-1111111111111111111	-11111111111111111111	-111111111111111111111
 create table t1 (a tinyint, b smallint, c mediumint, d int, e bigint, f float(3,2), g double(4,3), h decimal(5,4), i year, j date, k timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP, l datetime, m enum('a','b'), n set('a','b'), o char(10));
 select * from t1;
 Catalog	Database	Table	Table_alias	Column	Column_alias	Type	Length	Max length	Is_null	Flags	Decimals	Charsetnr

mysql-test/t/metadata.test

@@ -14,6 +14,51 @@ drop table if exists t1,t2;
 #
 
 select 1, 1.0, -1, "hello", NULL;
+SELECT
+  1 AS c1,
+  11 AS c2,
+  111 AS c3,
+  1111 AS c4,
+  11111 AS c5,
+  111111 AS c6,
+  1111111 AS c7,
+  11111111 AS c8,
+  111111111 AS c9,
+  1111111111 AS c10,
+  11111111111 AS c11,
+  111111111111 AS c12,
+  1111111111111 AS c13,
+  11111111111111 AS c14,
+  111111111111111 AS c15,
+  1111111111111111 AS c16,
+  11111111111111111 AS c17,
+  111111111111111111 AS c18,
+  1111111111111111111 AS c19,
+  11111111111111111111 AS c20,
+  111111111111111111111 AS c21;
+
+SELECT
+  -1 AS c1,
+  -11 AS c2,
+  -111 AS c3,
+  -1111 AS c4,
+  -11111 AS c5,
+  -111111 AS c6,
+  -1111111 AS c7,
+  -11111111 AS c8,
+  -111111111 AS c9,
+  -1111111111 AS c10,
+  -11111111111 AS c11,
+  -111111111111 AS c12,
+  -1111111111111 AS c13,
+  -11111111111111 AS c14,
+  -111111111111111 AS c15,
+  -1111111111111111 AS c16,
+  -11111111111111111 AS c17,
+  -111111111111111111 AS c18,
+  -1111111111111111111 AS c19,
+  -11111111111111111111 AS c20,
+  -111111111111111111111 AS c21;
 
 create table t1 (a tinyint, b smallint, c mediumint, d int, e bigint, f float(3,2), g double(4,3), h decimal(5,4), i year, j date, k timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP, l datetime, m enum('a','b'), n set('a','b'), o char(10));
 select * from t1;

sql/item.h

@@ -3151,7 +3151,10 @@ class Item_int :public Item_num
   Item_int(THD *thd, const char *str_arg, uint length=64);
   enum Type type() const { return INT_ITEM; }
   enum Item_result result_type () const { return INT_RESULT; }
-  enum_field_types field_type() const { return MYSQL_TYPE_LONGLONG; }
+  enum_field_types field_type() const
+  {
+    return Item_int::type_handler()->field_type();
+  }
   const Type_handler *type_handler() const
   {
     // The same condition is repeated in Item::create_tmp_field()

sql/sp_head.cc

@@ -2985,7 +2985,7 @@ sp_head::show_routine_code(THD *thd)
       push_warning(thd, Sql_condition::WARN_LEVEL_WARN, ER_UNKNOWN_ERROR, tmp);
     }
     protocol->prepare_for_resend();
-    protocol->store((longlong)ip);
+    protocol->store_long(ip);
 
     buffer.set("", 0, system_charset_info);
     i->print(&buffer);