Bug #28701:

Views don't have indexes. So they can't take index hints.
Added a check and disabled the usage of hints for views.


mysql-test/r/view.result:
  Bug #28701: test case
mysql-test/t/view.test:
  Bug #28701: test case
sql/sql_view.cc:
  Bug #28701: disable usage of hints for views

mysql-test/r/view.result

@@ -612,7 +612,7 @@ drop table t1;
 create table t1 (a int, b int);
 create view v1 as select a, sum(b) from t1 group by a;
 select b from v1 use index (some_index) where b=1;
-ERROR HY000: Key 'some_index' doesn't exist in table 'v1'
+ERROR HY000: Incorrect usage of USE INDEX and VIEW
 drop view v1;
 drop table t1;
 create table t1 (col1 char(5),col2 char(5));
@@ -3455,4 +3455,15 @@ a1	c
 2	0
 DROP VIEW v1,v2;
 DROP TABLE t1,t2,t3,t4;
+CREATE TABLE t1 (a INT);
+INSERT INTO t1 VALUES (1),(2);
+CREATE VIEW v1 AS SELECT * FROM t1;
+SELECT * FROM v1 USE KEY(non_existant);
+ERROR HY000: Incorrect usage of USE INDEX and VIEW
+SELECT * FROM v1 FORCE KEY(non_existant);
+ERROR HY000: Incorrect usage of FORCE INDEX and VIEW
+SELECT * FROM v1 IGNORE KEY(non_existant);
+ERROR HY000: Incorrect usage of IGNORE INDEX and VIEW
+DROP VIEW v1;
+DROP TABLE t1;
 End of 5.0 tests.

mysql-test/t/view.test

@@ -506,7 +506,7 @@ drop table t1;
 #
 create table t1 (a int, b int);
 create view v1 as select a, sum(b) from t1 group by a;
--- error 1176
+--error ER_WRONG_USAGE
 select b from v1 use index (some_index) where b=1;
 drop view v1;
 drop table t1;
@@ -3320,4 +3320,24 @@ SELECT * FROM t1;
 DROP VIEW v1,v2;
 DROP TABLE t1,t2,t3,t4;
 
+
+#
+# Bug #28701: SELECTs from VIEWs completely ignore USE/FORCE KEY, allowing
+# invalid statements
+#
+
+CREATE TABLE t1 (a INT);
+INSERT INTO t1 VALUES (1),(2);
+CREATE VIEW v1 AS SELECT * FROM t1;
+--error ER_WRONG_USAGE
+SELECT * FROM v1 USE KEY(non_existant);
+--error ER_WRONG_USAGE
+SELECT * FROM v1 FORCE KEY(non_existant);
+--error ER_WRONG_USAGE
+SELECT * FROM v1 IGNORE KEY(non_existant);
+
+DROP VIEW v1;
+DROP TABLE t1;
+
+
 --echo End of 5.0 tests.

sql/sql_view.cc

@@ -918,6 +918,15 @@ bool mysql_make_view(THD *thd, File_parser *parser, TABLE_LIST *table,
     DBUG_RETURN(0);
   }
 
+  if (table->use_index || table->ignore_index)
+  {
+      my_error(ER_WRONG_USAGE, MYF(0),
+               table->ignore_index ? "IGNORE INDEX" :
+                 (table->force_index ? "FORCE INDEX" : "USE INDEX"), 
+               "VIEW");
+      DBUG_RETURN(TRUE);
+  }
+
   /* check loop via view definition */
   for (TABLE_LIST *precedent= table->referencing_view;
        precedent;