Added support for delete_all_rows() for archive. This fixes bug #12836.

mysql-test/r/archive.result:
  Update for test case to make sure that TRUNCATE and DELETE function(hah!) as designed.
mysql-test/t/archive.test:
  Add TRUNCATE and DELETE support.
sql/examples/ha_archive.cc:
  Added delete_all_rows() support.
sql/examples/ha_archive.h:
  Added delete_all_rows() support.
sql/handler.h:
  Added flags for fast delete support for archive and federated.

mysql-test/t/archive.test

@@ -1310,6 +1310,19 @@ rename table t3 to t4;
 select * from t4 where fld3='bonfire';
 select count(*) from t4;
 
-drop table t1, t2, t4;
 
 # End of 4.1 tests
+
+#
+# For bug #12836
+# Delete was allowing all rows to be removed
+DELETE FROM t2;
+SELECT * FROM t2;
+INSERT INTO t2 VALUES (2,011401,37,'breaking','dreaded','Steinberg','W');
+INSERT INTO t2 VALUES (3,011402,37,'Romans','scholastics','jarring','');
+INSERT INTO t2 VALUES (4,011403,37,'intercepted','audiology','tinily','');
+SELECT * FROM t2;
+TRUNCATE TABLE t2;
+SELECT * FROM t2;
+
+drop table t1, t2, t4;

sql/examples/ha_archive.cc

@@ -1001,4 +1001,15 @@ ha_rows ha_archive::records_in_range(uint inx, key_range *min_key,
   DBUG_ENTER("ha_archive::records_in_range ");
   DBUG_RETURN(records); // HA_ERR_WRONG_COMMAND 
 }
+
+/*
+  We cancel a truncate command. The only way to delete an archive table is to drop it.
+  This is done for security reasons. In a later version we will enable this by 
+  allowing the user to select a different row format.
+*/
+int ha_archive::delete_all_rows()
+{
+  DBUG_ENTER("ha_archive::delete_all_rows");
+  DBUG_RETURN(0);
+}
 #endif /* HAVE_ARCHIVE_DB */

sql/examples/ha_archive.h

@@ -95,6 +95,7 @@ class ha_archive: public handler
   int write_row(byte * buf);
   int update_row(const byte * old_data, byte * new_data);
   int delete_row(const byte * buf);
+  int delete_all_rows();
   int index_read(byte * buf, const byte * key,
                  uint key_len, enum ha_rkey_function find_flag);
   int index_read_idx(byte * buf, uint idx, const byte * key,

sql/handler.h

@@ -531,6 +531,8 @@ extern TYPELIB tx_isolation_typelib;
 
 #define ha_supports_generate(T) (T != DB_TYPE_INNODB && \
                                  T != DB_TYPE_BERKELEY_DB && \
+                                 T != DB_TYPE_ARCHIVE_DB && \
+                                 T != DB_TYPE_FEDERATED_DB && \
                                  T != DB_TYPE_NDBCLUSTER)
 
 bool ha_caching_allowed(THD* thd, char* table_key,