delete row now pulls error message from remote server.

Added test cases with archive (where delete & update will always fail)
http://bugs.mysql.com/bug.php?id=12659


sql/ha_federated.cc:
  populate the error buffer with error message from remote system

mysql-test/r/federated_archive.result

+stop slave;
+drop table if exists t1,t2,t3,t4,t5,t6,t7,t8,t9;
+reset master;
+reset slave;
+drop table if exists t1,t2,t3,t4,t5,t6,t7,t8,t9;
+start slave;
+stop slave;
+DROP DATABASE IF EXISTS federated;
+CREATE DATABASE federated;
+DROP DATABASE IF EXISTS federated;
+CREATE DATABASE federated;
+DROP TABLE IF EXISTS federated.archive_table;
+CREATE TABLE federated.archive_table (
+`id` int(4) NOT NULL,
+`name` varchar(54) default NULL
+) ENGINE=ARCHIVE DEFAULT CHARSET=latin1;
+DROP TABLE IF EXISTS federated.t1;
+CREATE TABLE federated.t1 (
+`id` int(4) NOT NULL,
+`name` varchar(54) default NULL,
+PRIMARY KEY (`id`)
+)
+ENGINE="FEDERATED" DEFAULT CHARSET=latin1
+COMMENT='mysql://root@127.0.0.1:SLAVE_PORT/federated/archive_table';
+INSERT INTO federated.t1 (id, name) VALUES (1, 'foo');
+INSERT INTO federated.t1 (id, name) VALUES (2, 'bar');
+SELECT * FROM federated.t1;
+id	name
+1	foo
+2	bar
+DELETE FROM federated.t1 WHERE id = 1;
+ERROR HY000: There was a problem processing the query on the foreign data source. Data source error: ': 1031 : Table storage engine for 'archive_table' doesn't have t'
+SELECT * FROM federated.t1;
+id	name
+1	foo
+2	bar
+UPDATE federated.t1 SET name='baz' WHERE id = 1;
+ERROR HY000: There was a problem processing the query on the foreign data source. Data source error: ': 1031 : Table storage engine for 'archive_table' doesn't have t'
+SELECT * FROM federated.t1;
+id	name
+1	foo
+2	bar
+DROP TABLE federated.t1;
+DROP TABLE federated.archive_table;
+DROP TABLE IF EXISTS federated.t1;
+DROP DATABASE IF EXISTS federated;
+DROP TABLE IF EXISTS federated.t1;
+DROP DATABASE IF EXISTS federated;

mysql-test/t/federated_archive.test

+source include/have_archive.inc;
+source include/federated.inc;
+
+
+connection slave;
+--disable_warnings
+DROP TABLE IF EXISTS federated.archive_table;
+--enable_warnings
+
+CREATE TABLE federated.archive_table (
+  `id` int(4) NOT NULL,
+  `name` varchar(54) default NULL
+  ) ENGINE=ARCHIVE DEFAULT CHARSET=latin1;
+
+
+connection master;
+--disable_warnings
+DROP TABLE IF EXISTS federated.t1;
+--enable_warnings
+
+--replace_result $SLAVE_MYPORT SLAVE_PORT
+eval CREATE TABLE federated.t1 (
+    `id` int(4) NOT NULL,
+    `name` varchar(54) default NULL,
+    PRIMARY KEY (`id`)
+    )
+  ENGINE="FEDERATED" DEFAULT CHARSET=latin1
+  COMMENT='mysql://root@127.0.0.1:$SLAVE_MYPORT/federated/archive_table';
+
+INSERT INTO federated.t1 (id, name) VALUES (1, 'foo');
+INSERT INTO federated.t1 (id, name) VALUES (2, 'bar');
+
+SELECT * FROM federated.t1;
+
+--error 1430
+DELETE FROM federated.t1 WHERE id = 1;
+
+SELECT * FROM federated.t1;
+
+
+--error 1430
+UPDATE federated.t1 SET name='baz' WHERE id = 1;
+
+SELECT * FROM federated.t1;
+
+
+# --error 1430
+# TRUNCATE federated.t1;
+#
+# SELECT * from federated.t1;
+
+DROP TABLE federated.t1;
+connection slave;
+DROP TABLE federated.archive_table;
+
+
+source include/federated_cleanup.inc;
+

sql/ha_federated.cc

@@ -1960,6 +1960,8 @@ int ha_federated::delete_row(const byte *buf)
   {
     int error_code= ER_QUERY_ON_FOREIGN_DATA_SOURCE;
     char error_buffer[FEDERATED_QUERY_BUFFER_SIZE];
+    my_sprintf(error_buffer, (error_buffer, ": %d : %s",
+              mysql_errno(mysql), mysql_error(mysql)));
     my_error(error_code, MYF(0), error_buffer);
     DBUG_RETURN(error_code);
   }