diff --git a/mysql-test/t/view.test b/mysql-test/t/view.test
index a599f948c1e..51c862f692d 100644
--- a/mysql-test/t/view.test
+++ b/mysql-test/t/view.test
@@ -3213,6 +3213,18 @@ EXPLAIN SELECT * FROM t1 UNION SELECT * FROM v1 ORDER BY a;
 DROP VIEW v1;
 DROP TABLE t1;
 
+#
+# Bug #27921 View ignores precision for CAST()
+#
+CREATE VIEW v1 AS SELECT CAST( 1.23456789 AS DECIMAL( 7,5 ) ) AS col;
+SELECT * FROM v1;
+DESCRIBE v1;
+DROP VIEW v1;
+
+CREATE VIEW v1 AS SELECT CAST(1.23456789 AS DECIMAL(8,0)) AS col;
+SHOW CREATE VIEW v1;
+DROP VIEW v1;
+
 --echo End of 5.0 tests.
 
 #
diff --git a/sql/item_create.cc b/sql/item_create.cc
index c40c7a4de6c..29d2b8fe3b3 100644
--- a/sql/item_create.cc
+++ b/sql/item_create.cc
@@ -3947,6 +3947,7 @@ Create_func_master_pos_wait::create_native(THD *thd, LEX_STRING name,
     my_error(ER_WRONG_PARAMCOUNT_TO_NATIVE_FCT, MYF(0), name.str);
     break;
   }
+  }
 
   return func;
 }
@@ -4972,7 +4973,7 @@ find_qualified_function_builder(THD *thd)
 
 
 Item *
-create_func_cast(Item *a, Cast_target cast_type,
+create_func_cast(THD *thd, Item *a, Cast_target cast_type,
                  const char *c_len, const char *c_dec,
                  CHARSET_INFO *cs)
 {
diff --git a/sql/my_decimal.cc b/sql/my_decimal.cc
index 7b2d271639f..8823fac3393 100644
--- a/sql/my_decimal.cc
+++ b/sql/my_decimal.cc
@@ -208,6 +208,17 @@ my_decimal *date2my_decimal(MYSQL_TIME *ltime, my_decimal *dec)
 }
 
 
+void my_decimal_trim(ulong *precision, uint *scale)
+{
+  if (!(*precision) && !(*scale))
+  {
+    *precision= 10;
+    *scale= 0;
+    return;
+  }
+}
+
+
 #ifndef DBUG_OFF
 /* routines for debugging print */
 
diff --git a/sql/my_decimal.h b/sql/my_decimal.h
index b349fc3f62e..17eb75cfdc5 100644
--- a/sql/my_decimal.h
+++ b/sql/my_decimal.h
@@ -395,15 +395,7 @@ int my_decimal_intg(const my_decimal *a)
 }
 
 
-void my_decimal_trim(ulong *precision, uint *scale)
-{
-  if (!(*precision) && !(*scale))
-  {
-    *precision= 10;
-    *scale= 0;
-    return;
-  }
-}
+void my_decimal_trim(ulong *precision, uint *scale);
 
 
 #endif /*my_decimal_h*/