test that attribute name truncation works

    exposed the attribute name size limit for handler
   added field name truncation to ndb handler

mysql-test/t/ndb_basic.test

@@ -507,3 +507,18 @@ c127 int,
 c128 int,
 primary key(c1)) engine=ndb;
 drop table t1;
+
+#
+# test max size of attribute name and truncation
+#
+
+create table t1 (
+a1234567890123456789012345678901234567890 int primary key,
+a12345678901234567890123456789a1234567890 int,
+index(a12345678901234567890123456789a1234567890)
+) engine=ndb;
+show tables;
+insert into t1 values (1,1),(2,1),(3,1),(4,1),(5,2),(6,1),(7,1);
+explain select * from t1 where a12345678901234567890123456789a1234567890=2;
+select * from t1 where a12345678901234567890123456789a1234567890=2;
+drop table t1;

ndb/include/ndbapi/ndbapi_limits.h

@@ -22,6 +22,7 @@
 #define NDB_MAX_DATABASE_NAME_SIZE 128
 #define NDB_MAX_SCHEMA_NAME_SIZE 128
 #define NDB_MAX_TAB_NAME_SIZE 128
+#define NDB_MAX_ATTR_NAME_SIZE 32
 #define NDB_MAX_ATTRIBUTES_IN_TABLE 128
 
 #define NDB_MAX_TUPLE_SIZE_IN_WORDS 2013

sql/ha_ndbcluster.cc

@@ -1393,8 +1393,13 @@ int ha_ndbcluster::set_bounds(NdbIndexScanOperation *op,
 
         // Set bound if not cancelled via type -1
         if (p.bound_type != -1)
-          if (op->setBound(field->field_name, p.bound_type, p.bound_ptr))
+	{
+	  char truncated_field_name[NDB_MAX_ATTR_NAME_SIZE];
+	  strnmov(truncated_field_name,field->field_name,sizeof(truncated_field_name));
+	  truncated_field_name[sizeof(truncated_field_name)-1]= '\0';
+          if (op->setBound(truncated_field_name, p.bound_type, p.bound_ptr))
             ERR_RETURN(op->getNdbError());
+	}
       }
     }
 
@@ -3102,7 +3107,12 @@ static int create_ndb_column(NDBCOL &col,
                              HA_CREATE_INFO *info)
 {
   // Set name
-  col.setName(field->field_name);
+  {
+    char truncated_field_name[NDB_MAX_ATTR_NAME_SIZE];
+    strnmov(truncated_field_name,field->field_name,sizeof(truncated_field_name));
+    truncated_field_name[sizeof(truncated_field_name)-1]= '\0';
+    col.setName(truncated_field_name);
+  }
   // Get char set
   CHARSET_INFO *cs= field->charset();
   // Set type and sizes
@@ -3430,7 +3440,12 @@ int ha_ndbcluster::create_index(const char *name,
   {
     Field *field= key_part->field;
     DBUG_PRINT("info", ("attr: %s", field->field_name));
-    ndb_index.addColumnName(field->field_name);
+    {
+      char truncated_field_name[NDB_MAX_ATTR_NAME_SIZE];
+      strnmov(truncated_field_name,field->field_name,sizeof(truncated_field_name));
+      truncated_field_name[sizeof(truncated_field_name)-1]= '\0';
+      ndb_index.addColumnName(truncated_field_name);
+    }
   }
   
   if (dict->createIndex(ndb_index))