Fix for bug#6935 table rename does not work with ndb tables

mysql-test/r/ndb_alter_table.result

 DROP TABLE IF EXISTS t1;
+drop database if exists mysqltest;
 CREATE TABLE t1 (
 a INT NOT NULL,
 b INT NOT NULL
@@ -9,6 +10,21 @@ SELECT * FROM t1;
 a	b	c
 9410	9412	0
 DROP TABLE t1;
+CREATE DATABASE mysqltest;
+USE mysqltest;
+CREATE TABLE t1 (
+a INT NOT NULL,
+b INT NOT NULL
+) ENGINE=ndbcluster;
+RENAME TABLE t1 TO test.t1;
+SHOW TABLES;
+Tables_in_mysqltest
+DROP DATABASE mysqltest;
+USE test;
+SHOW TABLES;
+Tables_in_test
+t1
+DROP TABLE t1;
 create table t1 (
 col1 int not null auto_increment primary key,
 col2 varchar(30) not null,

mysql-test/t/ndb_alter_table.test

@@ -2,6 +2,7 @@
 
 --disable_warnings
 DROP TABLE IF EXISTS t1;
+drop database if exists mysqltest;
 --enable_warnings
 
 #
@@ -20,6 +21,22 @@ SELECT * FROM t1;
 
 DROP TABLE t1;
 
+#
+# Verfify changing table names between databases
+#
+CREATE DATABASE mysqltest;
+USE mysqltest;
+CREATE TABLE t1 (
+  a INT NOT NULL,
+  b INT NOT NULL
+) ENGINE=ndbcluster;
+RENAME TABLE t1 TO test.t1;
+SHOW TABLES;
+DROP DATABASE mysqltest;
+USE test;
+SHOW TABLES;
+DROP TABLE t1;
+
 #
 # More advanced test
 #

ndb/include/ndbapi/NdbDictionary.hpp

@@ -989,6 +989,13 @@ public:
      */
     Table getTableForAlteration(const char * name);
 
+    /**
+     * Get copy a copy of a table for alteration.
+     * @param table   Table object to alter
+     * @return table if successful. NULL if undefined
+     */
+    Table getTableForAlteration(const Table &);
+
 #ifndef DOXYGEN_SHOULD_SKIP_INTERNAL
     /**
      * Invalidate cached table object

ndb/src/ndbapi/NdbDictionary.cpp

@@ -775,12 +775,17 @@ NdbDictionary::Dictionary::removeCachedTable(const char * name){
 
 NdbDictionary::Table
 NdbDictionary::Dictionary::getTableForAlteration(const char * name){
-  const NdbDictionary::Table * oldTable = getTable(name);
+  const Table * oldTable = getTable(name);
   return (oldTable) ? 
     NdbDictionary::Table(*oldTable) 
     : NdbDictionary::Table();
 }
 
+NdbDictionary::Table
+NdbDictionary::Dictionary::getTableForAlteration(const Table & tab){
+  return NdbDictionary::Table(tab);
+}
+
 int
 NdbDictionary::Dictionary::createIndex(const Index & ind)
 {

ndb/src/ndbapi/NdbDictionaryImpl.cpp

@@ -1411,15 +1411,14 @@ int NdbDictionaryImpl::alterTable(NdbTableImpl &impl)
   const char * originalInternalName = internalName.c_str();
   BaseString externalName = impl.m_externalName;
   const char * originalExternalName = externalName.c_str();
-  NdbTableImpl * oldTab = getTable(originalExternalName);
 
-  if(!oldTab){
+  DBUG_ENTER("NdbDictionaryImpl::alterTable");
+  if(!get_local_table_info(originalInternalName, false)){
     m_error.code = 709;
-    return -1;
+    DBUG_RETURN(-1);
   }
   // Alter the table
   int ret = m_receiver.alterTable(m_ndb, impl);
-
   if(ret == 0){
     // Remove cached information and let it be refreshed at next access
     if (m_localHash.get(originalInternalName) != NULL) {
@@ -1433,7 +1432,7 @@ int NdbDictionaryImpl::alterTable(NdbTableImpl &impl)
       m_globalHash->unlock();
     }
   }
-  return ret;
+  DBUG_RETURN(ret)
 }
 
 int 
@@ -1448,15 +1447,16 @@ NdbDictInterface::createOrAlterTable(Ndb & ndb,
 				     NdbTableImpl & impl,
 				     bool alter)
 {
+  DBUG_ENTER("NdbDictInterface::createOrAlterTable");
   unsigned i;
   if((unsigned)impl.getNoOfPrimaryKeys() > NDB_MAX_NO_OF_ATTRIBUTES_IN_KEY){
     m_error.code = 4317;
-    return -1;
+    DBUG_RETURN(-1);
   }
   unsigned sz = impl.m_columns.size();
   if (sz > NDB_MAX_ATTRIBUTES_IN_TABLE){
     m_error.code = 4318;
-    return -1;
+    DBUG_RETURN(-1);
   }
 
   impl.copyNewProperties();
@@ -1491,7 +1491,7 @@ NdbDictInterface::createOrAlterTable(Ndb & ndb,
   // Check max length of frm data
   if (impl.m_frm.length() > MAX_FRM_DATA_SIZE){
     m_error.code = 1229;
-    return -1;
+    DBUG_RETURN(-1);
   }
   tmpTab.FrmLen = impl.m_frm.length();
   memcpy(tmpTab.FrmData, impl.m_frm.get_data(), impl.m_frm.length());
@@ -1543,12 +1543,12 @@ NdbDictInterface::createOrAlterTable(Ndb & ndb,
     // charset is defined exactly for char types
     if (col->getCharType() != (col->m_cs != NULL)) {
       m_error.code = 703;
-      return -1;
+      DBUG_RETURN(-1);
     }
     // primary key type check
     if (col->m_pk && ! NdbSqlUtil::usable_in_pk(col->m_type, col->m_cs)) {
       m_error.code = 743;
-      return -1;
+      DBUG_RETURN(-1);
     }
     // charset in upper half of precision
     if (col->getCharType()) {
@@ -1616,7 +1616,7 @@ NdbDictInterface::createOrAlterTable(Ndb & ndb,
       }
     }
   }
-  return ret;
+  DBUG_RETURN(ret);
 }
 
 int

sql/ha_ndbcluster.cc

@@ -3627,9 +3627,13 @@ int ha_ndbcluster::create_index(const char *name,
 
 int ha_ndbcluster::rename_table(const char *from, const char *to)
 {
+  NDBDICT *dict;
   char new_tabname[FN_HEADLEN];
+  const NDBTAB *orig_tab;
+  int result;
 
   DBUG_ENTER("ha_ndbcluster::rename_table");
+  DBUG_PRINT("info", ("Renaming %s to %s", from, to));
   set_dbname(from);
   set_tabname(from);
   set_tabname(to, new_tabname);
@@ -3637,12 +3641,18 @@ int ha_ndbcluster::rename_table(const char *from, const char *to)
   if (check_ndb_connection())
     DBUG_RETURN(my_errno= HA_ERR_NO_CONNECTION);
 
+  dict= m_ndb->getDictionary();
+  if (!(orig_tab= dict->getTable(m_tabname)))
+    ERR_RETURN(dict->getNdbError());
 
-  int result= alter_table_name(m_tabname, new_tabname);
-  if (result == 0)
+  m_table= (void *)orig_tab;
+  // Change current database to that of target table
+  set_dbname(to);
+  m_ndb->setDatabaseName(m_dbname);
+  if (!(result= alter_table_name(new_tabname)))
   {
-    set_tabname(to);
-    handler::rename_table(from, to);
+    // Rename .ndb file
+    result= handler::rename_table(from, to);
   }
 
   DBUG_RETURN(result);
@@ -3653,19 +3663,16 @@ int ha_ndbcluster::rename_table(const char *from, const char *to)
   Rename a table in NDB Cluster using alter table
  */
 
-int ha_ndbcluster::alter_table_name(const char *from, const char *to)
+int ha_ndbcluster::alter_table_name(const char *to)
 {
-  NDBDICT *dict= m_ndb->getDictionary();
-  const NDBTAB *orig_tab;
+  NDBDICT * dict= m_ndb->getDictionary();
+  const NDBTAB *orig_tab= (const NDBTAB *) m_table;
+  int ret;
   DBUG_ENTER("alter_table_name_table");
-  DBUG_PRINT("enter", ("Renaming %s to %s", from, to));
 
-  if (!(orig_tab= dict->getTable(from)))
-    ERR_RETURN(dict->getNdbError());
-      
-  NdbDictionary::Table copy_tab= dict->getTableForAlteration(from);
-  copy_tab.setName(to);
-  if (dict->alterTable(copy_tab) != 0)
+  NdbDictionary::Table new_tab= dict->getTableForAlteration(*orig_tab);
+  new_tab.setName(to);
+  if (dict->alterTable(new_tab) != 0)
     ERR_RETURN(dict->getNdbError());
 
   m_table= NULL;
@@ -3688,7 +3695,7 @@ int ha_ndbcluster::delete_table(const char *name)
   
   if (check_ndb_connection())
     DBUG_RETURN(HA_ERR_NO_CONNECTION);
-
+  // Remove .ndb file
   handler::delete_table(name);
   DBUG_RETURN(drop_table());
 }
@@ -3944,6 +3951,7 @@ Ndb* check_ndb_in_thd(THD* thd)
 }
 
 
+
 int ha_ndbcluster::check_ndb_connection()
 {
   THD* thd= current_thd;

sql/ha_ndbcluster.h

@@ -148,7 +148,7 @@ class ha_ndbcluster: public handler
   uint8 table_cache_type();
     
  private:
-  int alter_table_name(const char *from, const char *to);
+  int alter_table_name(const char *to);
   int drop_table();
   int create_index(const char *name, KEY *key_info, bool unique);
   int create_ordered_index(const char *name, KEY *key_info);