Per a user request there is now support for "CHECK TABLE" where the table is an archive file.

mysql-test/r/archive.result:
  Result file for adding check table support
mysql-test/t/archive.test:
  Simple test for check table. The additional select is added just to make sure the file is not destroyed.
sql/ha_archive.cc:
  Updates for adding CHECK table support. is_crashed() now returns the state of the file.
sql/ha_archive.h:
  Updates for adding CHECK table support

mysql-test/t/archive.test

@@ -1339,8 +1339,12 @@ SELECT * FROM t2;
 TRUNCATE TABLE t2;
 SELECT * FROM t2;
 
+# Adding support for CHECK table
+CHECK TABLE t2;
+SELECT * FROM t2;
+
 
-# Just test syntax, we will never know if the out put is right or wrong
+# Just test syntax, we will never know if the output is right or wrong
 # Must be the last test
 INSERT DELAYED INTO t2 VALUES (4,011403,37,'intercepted','audiology','tinily','');
 # 

sql/ha_archive.cc

@@ -1053,4 +1053,81 @@ int ha_archive::delete_all_rows()
   DBUG_ENTER("ha_archive::delete_all_rows");
   DBUG_RETURN(0);
 }
+
+/*
+  We just return state if asked.
+*/
+bool ha_archive::is_crashed() const 
+{
+  return share->crashed; 
+}
+
+/*
+  Simple scan of the tables to make sure everything is ok.
+*/
+
+int ha_archive::check(THD* thd, HA_CHECK_OPT* check_opt)
+{
+  int rc= 0;
+  byte *buf; 
+  const char *old_proc_info=thd->proc_info;
+  ha_rows count= share->rows_recorded;
+  DBUG_ENTER("ha_archive::check");
+
+  thd->proc_info= "Checking table";
+  /* Flush any waiting data */
+  gzflush(share->archive_write, Z_SYNC_FLUSH);
+
+  /* 
+    First we create a buffer that we can use for reading rows, and can pass
+    to get_row().
+  */
+  if (!(buf= (byte*) my_malloc(table->s->reclength, MYF(MY_WME))))
+    rc= HA_ERR_OUT_OF_MEM;
+
+  /*
+    Now we will rewind the archive file so that we are positioned at the 
+    start of the file.
+  */
+  if (!rc)
+    read_data_header(archive);
+
+  if (!rc)
+    while (!(rc= get_row(archive, buf)))
+      count--;
+
+  my_free((char*)buf, MYF(0));
+
+  thd->proc_info= old_proc_info;
+
+  if ((rc && rc != HA_ERR_END_OF_FILE) || count)  
+  {
+    share->crashed= FALSE;
+    DBUG_RETURN(HA_ADMIN_CORRUPT);
+  }
+  else
+  {
+    DBUG_RETURN(HA_ADMIN_OK);
+  }
+}
+
+/*
+  Check and repair the table if needed.
+*/
+bool ha_archive::check_and_repair(THD *thd) 
+{
+  HA_CHECK_OPT check_opt;
+  DBUG_ENTER("ha_archive::check_and_repair");
+
+  check_opt.init();
+
+  if (check(thd, &check_opt) == HA_ADMIN_CORRUPT)
+  {
+    DBUG_RETURN(repair(thd, &check_opt));
+  }
+  else
+  {
+    DBUG_RETURN(HA_ADMIN_OK);
+  }
+}
 #endif /* HAVE_ARCHIVE_DB */

sql/ha_archive.h

@@ -103,6 +103,9 @@ public:
   }
   THR_LOCK_DATA **store_lock(THD *thd, THR_LOCK_DATA **to,
                              enum thr_lock_type lock_type);
+  bool is_crashed() const;
+  int check(THD* thd, HA_CHECK_OPT* check_opt);
+  bool check_and_repair(THD *thd);
 };
 
 bool archive_db_init(void);