Fix for BUG#6808.

The problem was in that add_table_to_list was testing for duplicate tables
in a list of tables that included the created view.


mysql-test/r/view.result:
  Test for BUG#6808
mysql-test/t/view.test:
  Test for BUG#6808
sql/sql_parse.cc:
  When testing for table name uniquness, skip the first table the current
  statement is CREATE VIEW. Notice that the first table is skipped differently
  for CREATE TABLE ... SELECT ... statements, so we don't have to handle that
  case here (see production 'create_select', the call 'to save_and_clear').

mysql-test/r/view.result

@@ -1146,11 +1146,11 @@ create view v2 as select * from v1;
 alter view v1 as select * from v2;
 ERROR 42S02: Table 'test.v1' doesn't exist
 alter view v1 as select * from v1;
-ERROR 42000: Not unique table/alias: 'v1'
+ERROR 42S02: Table 'test.v1' doesn't exist
 create or replace view v1 as select * from v2;
 ERROR 42S02: Table 'test.v1' doesn't exist
 create or replace view v1 as select * from v1;
-ERROR 42000: Not unique table/alias: 'v1'
+ERROR 42S02: Table 'test.v1' doesn't exist
 drop view v2,v1;
 drop table t1;
 create table t1 (a int);
@@ -2186,3 +2186,7 @@ r_object_id	users_names
 120001a080000542	guser02
 drop view v1, v2;
 drop table t1, t2;
+create table t1 (s1 int);
+create view abc as select * from t1 as abc;
+drop table t1;
+drop view abc;

mysql-test/t/view.test

@@ -1083,11 +1083,11 @@ create view v1 as select * from t1;
 create view v2 as select * from v1;
 -- error 1146
 alter view v1 as select * from v2;
--- error 1066
+-- error 1146
 alter view v1 as select * from v1;
 -- error 1146
 create or replace view v1 as select * from v2;
--- error 1066
+-- error 1146
 create or replace view v1 as select * from v1;
 drop view v2,v1;
 drop table t1;
@@ -2059,3 +2059,12 @@ order by users_names;
 
 drop view v1, v2;
 drop table t1, t2;
+
+#
+# Bug #6808 - Views: CREATE VIEW v ... FROM t AS v fails
+#
+
+create table t1 (s1 int); 
+create view abc as select * from t1 as abc;
+drop table t1;
+drop view abc;

sql/sql_parse.cc

@@ -6059,7 +6059,10 @@ TABLE_LIST *st_select_lex::add_table_to_list(THD *thd,
   /* check that used name is unique */
   if (lock_type != TL_IGNORE)
   {
-    for (TABLE_LIST *tables=(TABLE_LIST*) table_list.first ;
+    TABLE_LIST *first_table= (TABLE_LIST*) table_list.first;
+    if (lex->sql_command == SQLCOM_CREATE_VIEW)
+      first_table= first_table ? first_table->next_local : NULL;
+    for (TABLE_LIST *tables= first_table ;
 	 tables ;
 	 tables=tables->next_local)
     {