Fix for bug #10499 (Function creation with GEOMETRY return)

mysql-test/r/gis.result:
  test result fixed
mysql-test/t/gis.test:
  test case
sql/sp_head.cc:
  m_geom_returns is sent to make_field
sql/sp_head.h:
  m_geom_returns declared
sql/sql_yacc.yy:
  m_geom_returns initializing added

mysql-test/r/gis.result

@@ -670,3 +670,12 @@ create trigger t1_bu before update on t1 for each row set new.s1 = null;
 insert into t1 values (null,null);
 ERROR 23000: Column 's1' cannot be null
 drop table t1;
+create function fn3 () returns point return GeomFromText("point(1 1)");
+show create function fn3;
+Function	sql_mode	Create Function
+fn3		CREATE FUNCTION `test`.`fn3`() RETURNS point
+return GeomFromText("point(1 1)")
+select astext(fn3());
+astext(fn3())
+POINT(1 1)
+drop function fn3;

mysql-test/t/gis.test

@@ -383,3 +383,12 @@ create trigger t1_bu before update on t1 for each row set new.s1 = null;
 --error 1048
 insert into t1 values (null,null);
 drop table t1;
+
+#
+# Bug #10499 (function creation with GEOMETRY datatype)
+#
+create function fn3 () returns point return GeomFromText("point(1 1)"); 
+show create function fn3;
+select astext(fn3());
+drop function fn3;
+

sql/sp_head.cc

@@ -558,7 +558,7 @@ sp_head::make_field(uint max_length, const char *name, TABLE *dummy)
   field= ::make_field((char *)0,
 		!m_returns_len ? max_length : m_returns_len, 
 		(uchar *)"", 0, m_returns_pack, m_returns, m_returns_cs,
-		(enum Field::geometry_type)0, Field::NONE, 
+		m_geom_returns, Field::NONE, 
 		m_returns_typelib,
 		name ? name : (const char *)m_name.str, dummy);
   thd->mem_root= tmp_mem_root;

sql/sp_head.h

@@ -110,6 +110,7 @@ class sp_head :private Query_arena
 
   int m_type;			// TYPE_ENUM_FUNCTION or TYPE_ENUM_PROCEDURE
   enum enum_field_types m_returns; // For FUNCTIONs only
+  Field::geometry_type m_geom_returns;
   CHARSET_INFO *m_returns_cs;	// For FUNCTIONs only
   TYPELIB *m_returns_typelib;	// For FUNCTIONs only
   uint m_returns_len;		// For FUNCTIONs only

sql/sql_yacc.yy

@@ -1437,7 +1437,7 @@ create_function_tail:
             sp_prepare_create_field(YYTHD, new_field);
 
 	    if (prepare_create_field(new_field, &unused1, &unused2, &unused2,
-				     0))
+				     HA_CAN_GEOMETRY))
 	      YYABORT;
 
 	    sp->m_returns= new_field->sql_type;
@@ -1445,6 +1445,7 @@ create_function_tail:
 	    sp->m_returns_len= new_field->length;
 	    sp->m_returns_pack= new_field->pack_flag;
             sp->m_returns_typelib= new_field->interval;
+            sp->m_geom_returns= new_field->geom_type;
             new_field->interval= NULL;
 
 	    bzero((char *)&lex->sp_chistics, sizeof(st_sp_chistics));