BUG#4892 TRUNCATE TABLE returns error 156

Added NDBCLUSTER to table types which does not support generate. 
Added test case for truncate.


sql/handler.h:
  Add NDBCLUSTER to table types that does not support generate.

mysql-test/r/ndb_truncate.result

+DROP TABLE IF EXISTS t2;
+CREATE TABLE t2 (
+a bigint unsigned NOT NULL PRIMARY KEY,
+b int unsigned not null,
+c int unsigned
+) engine=ndbcluster;
+select count(*) from t2;
+count(*)
+5000
+truncate table t2;
+select count(*) from t2;
+count(*)
+0
+drop table t2;

mysql-test/t/ndb_truncate.test

+-- source include/have_ndb.inc
+
+--disable_warnings
+DROP TABLE IF EXISTS t2;
+--enable_warnings
+
+
+CREATE TABLE t2 (
+  a bigint unsigned NOT NULL PRIMARY KEY,
+  b int unsigned not null,
+  c int unsigned
+) engine=ndbcluster;
+
+
+#
+# insert records into table
+#
+let $1=500;
+disable_query_log;
+while ($1)
+{
+ eval insert into t2 values($1*10, $1+9, 5*$1), ($1*10+1, $1+10, 7),($1*10+2, $1+10, 7*$1), ($1*10+3, $1+10, 10+$1), ($1*10+4, $1+10, 70*$1), ($1*10+5, $1+10, 7), ($1*10+6, $1+10, 9), ($1*10+7, $1+299, 899), ($1*10+8, $1+10, 12), ($1*10+9, $1+10, 14*$1);
+ dec $1;
+}
+enable_query_log;
+
+select count(*) from t2;
+
+truncate table t2;
+
+select count(*) from t2;
+
+drop table t2;

sql/handler.h

@@ -516,7 +516,8 @@ extern TYPELIB tx_isolation_typelib;
 #define ha_rollback(thd) (ha_rollback_trans((thd), &((thd)->transaction.all)))
 
 #define ha_supports_generate(T) (T != DB_TYPE_INNODB && \
-                                 T != DB_TYPE_BERKELEY_DB)
+                                 T != DB_TYPE_BERKELEY_DB && \
+                                 T != DB_TYPE_NDBCLUSTER)
 
 bool ha_caching_allowed(THD* thd, char* table_key,
                         uint key_length, uint8 cache_type);