Merge fixes

BitKeeper/etc/logging_ok

@@ -93,6 +93,7 @@ kostja@oak.local
 lenz@kallisto.mysql.com
 lenz@mysql.com
 magnus@neptunus.(none)
+magnus@shellback.(none)
 marko@hundin.mysql.fi
 miguel@hegel.(none)
 miguel@hegel.br

include/my_base.h

@@ -241,6 +241,7 @@ enum ha_base_keytype {
 #define HA_CREATE_TMP_TABLE	4
 #define HA_CREATE_CHECKSUM	8
 #define HA_CREATE_DELAY_KEY_WRITE 64
+#define HA_CREATE_FROM_ENGINE   128 
 
 	/* Bits in flag to _status */
 
@@ -287,7 +288,7 @@ enum ha_base_keytype {
 #define HA_ERR_ROW_IS_REFERENCED 152     /* Cannot delete a parent row */
 #define HA_ERR_NO_SAVEPOINT	 153     /* No savepoint with that name */
 #define HA_ERR_NON_UNIQUE_BLOCK_SIZE 154 /* Non unique key block size */
-#define HA_ERR_OLD_METADATA      155  /* The frm file on disk is old */
+#define HA_ERR_NO_SUCH_TABLE     155  /* The table does not exist in engine */
 #define HA_ERR_TABLE_EXIST       156  /* The table existed in storage engine */
 #define HA_ERR_NO_CONNECTION     157  /* Could not connect to storage engine */
 

mysql-test/mysql-test-run.sh

@@ -520,6 +520,7 @@ if [ x$SOURCE_DIST = x1 ] ; then
  CHARSETSDIR="$BASEDIR/sql/share/charsets"
  INSTALL_DB="./install_test_db"
  MYSQL_FIX_SYSTEM_TABLES="$BASEDIR/scripts/mysql_fix_privilege_tables"
+ NDB_TOOLS_DIR="$BASEDIR/ndb/tools"
 else
  if test -x "$BASEDIR/libexec/mysqld"
  then
@@ -539,6 +540,7 @@ else
  MYSQL="$CLIENT_BINDIR/mysql"
  INSTALL_DB="./install_test_db --bin"
  MYSQL_FIX_SYSTEM_TABLES="$CLIENT_BINDIR/mysql_fix_privilege_tables"
+ NDB_TOOLS_DIR="$CLIENT_BINDIR"
  if test -d "$BASEDIR/share/mysql/english"
  then
    LANGUAGE="$BASEDIR/share/mysql/english/"
@@ -586,6 +588,7 @@ MYSQL_BINLOG="$MYSQL_BINLOG --no-defaults --local-load=$MYSQL_TMP_DIR $EXTRA_MYS
 MYSQL_FIX_SYSTEM_TABLES="$MYSQL_FIX_SYSTEM_TABLES --no-defaults --host=localhost --port=$MASTER_MYPORT --socket=$MASTER_MYSOCK --user=root --password=$DBPASSWD --basedir=$BASEDIR --bindir=$CLIENT_BINDIR --verbose"
 MYSQL="$MYSQL --host=localhost --port=$MASTER_MYPORT --socket=$MASTER_MYSOCK --user=root --password=$DBPASSWD"
 export MYSQL MYSQL_DUMP MYSQL_BINLOG MYSQL_FIX_SYSTEM_TABLES CLIENT_BINDIR 
+export NDB_TOOLS_DIR
 
 MYSQL_TEST_ARGS="--no-defaults --socket=$MASTER_MYSOCK --database=$DB \
  --user=$DBUSER --password=$DBPASSWD --silent -v --skip-safemalloc \
@@ -1595,10 +1598,13 @@ then
     fi
     ./ndb/ndbcluster --port-base=$NDBCLUSTER_PORT $NDBCLUSTER_OPTS --diskless --initial --data-dir=$MYSQL_TEST_DIR/var || exit 1
     USE_NDBCLUSTER="$USE_NDBCLUSTER --ndb-connectstring=\"host=localhost:$NDBCLUSTER_PORT\""
+     NDB_CONNECTSTRING="localhost:$NDBCLUSTER_PORT"
   else
     USE_NDBCLUSTER="$USE_NDBCLUSTER --ndb-connectstring=\"$USE_RUNNING_NDBCLUSTER\""
+    NDB_CONNECTSTRING="$USE_RUNNING_NDBCLUSTER"
     echo "Using ndbcluster at $USE_NDBCLUSTER"
   fi
+  export NDB_CONNECTSTRING
   fi
 
   start_manager

mysql-test/r/ndb_autodiscover.result

-drop table if exists t1,t2,t3,t4,t5,t6,t9;
+drop table if exists t1,t2,t3,t4,t5,t6,t7,t8,t9;
 flush status;
 create table t1(
 id int not null primary key,
@@ -94,8 +94,6 @@ ERROR 42S01: Table 't3' already exists
 show status like 'handler_discover%';
 Variable_name	Value
 Handler_discover	1
-SHOW TABLES FROM test;
-Tables_in_test
 create table IF NOT EXISTS t3(
 id int not null primary key,
 id2 int not null,
@@ -119,6 +117,162 @@ Variable_name	Value
 Handler_discover	2
 drop table t3;
 flush status;
+create table t7(
+id int not null primary key,
+name char(255)
+) engine=ndb;
+create table t6(
+id int not null primary key,
+name char(255)
+) engine=MyISAM;
+insert into t7 values (1, "Explorer");
+insert into t6 values (2, "MyISAM table");
+select * from t7;
+id	name
+1	Explorer
+show status like 'handler_discover%';
+Variable_name	Value
+Handler_discover	0
+flush tables;
+show tables from test;
+Tables_in_test
+t6
+t7
+show status like 'handler_discover%';
+Variable_name	Value
+Handler_discover	1
+flush tables;
+show table status;
+Name	Engine	Version	Row_format	Rows	Avg_row_length	Data_length	Max_data_length	Index_length	Data_free	Auto_increment	Create_time	Update_time	Check_time	Collation	Checksum	Create_options	Comment
+t6	MyISAM	9	Fixed	1	260	#	#	#	0	NULL	#	#	NULL	#	NULL		
+t7	ndbcluster	9	Fixed	1	0	#	#	#	0	NULL	#	#	NULL	#	NULL		
+show status like 'handler_discover%';
+Variable_name	Value
+Handler_discover	2
+drop table t6, t7;
+flush status;
+create table t4(
+id int not null primary key,
+name char(27)
+) engine=ndb;
+insert into t4 values (1, "Automatic");
+select * from t4;
+id	name
+1	Automatic
+select * from t4;
+ERROR 42S02: Table 'test.t4' doesn't exist
+select * from t4;
+ERROR 42S02: Table 'test.t4' doesn't exist
+show status like 'handler_discover%';
+Variable_name	Value
+Handler_discover	0
+drop table t4;
+flush status;
+create table t4(
+id int not null primary key,
+id2 int,
+name char(27)
+) engine=ndb;
+insert into t4 values (1, 76, "Automatic2");
+select * from t4;
+id	id2	name
+1	76	Automatic2
+flush tables;
+SHOW TABLES;
+Tables_in_test
+select * from t4;
+ERROR 42S02: Table 'test.t4' doesn't exist
+flush status;
+create table t1(id int) engine=ndbcluster;
+create table t2(id int, b char(255)) engine=myisam;
+create table t3(id int, c char(255)) engine=ndbcluster;
+create table t4(id int) engine=myisam;
+create table t5(id int, d char(56)) engine=ndbcluster;
+create table t6(id int) engine=ndbcluster;
+create table t7(id int) engine=ndbcluster;
+create table t8(id int, e char(34)) engine=myisam;
+create table t9(id int) engine=myisam;
+insert into t2 values (2, "myisam table 2");
+insert into t3 values (3, "ndb table 3");
+insert into t5 values (5, "ndb table 5");
+insert into t6 values (6);
+insert into t8 values (8, "myisam table 8");
+insert into t9 values (9);
+SHOW TABLES;
+Tables_in_test
+t1
+t2
+t4
+t8
+t9
+t7
+t6
+select * from t6;
+id
+6
+select * from t7;
+id
+show status like 'handler_discover%';
+Variable_name	Value
+Handler_discover	2
+drop table t1, t2, t4, t6, t7, t8, t9;
+flush status;
+create table t1(id int) engine=ndbcluster;
+create table t2(id int, b char(255)) engine=myisam;
+create table t3(id int, c char(255)) engine=ndbcluster;
+create table t4(id int) engine=myisam;
+create table t5(id int, d char(56)) engine=ndbcluster;
+create table t6(id int) engine=ndbcluster;
+create table t7(id int) engine=ndbcluster;
+create table t8(id int, e char(34)) engine=myisam;
+create table t9(id int) engine=myisam;
+insert into t2 values (2, "myisam table 2");
+insert into t3 values (3, "ndb table 3");
+insert into t5 values (5, "ndb table 5");
+insert into t6 values (6);
+insert into t8 values (8, "myisam table 8");
+insert into t9 values (9);
+SHOW TABLES LIKE 't6';
+Tables_in_test (t6)
+t6
+show status like 'handler_discover%';
+Variable_name	Value
+Handler_discover	1
+create table t3(a int);
+ERROR 42S01: Table 't3' already exists
+create table t5(a int);
+ERROR 42S01: Table 't5' already exists
+SHOW TABLES LIKE 't%';
+Tables_in_test (t%)
+t1
+t2
+t4
+t6
+t8
+t9
+t7
+show status like 'handler_discover%';
+Variable_name	Value
+Handler_discover	2
+drop table t1, t2, t4, t6, t7, t8, t9;
+flush status;
+create table t1(id int) engine=ndbcluster;
+create table t2(id int, b char(255)) engine=ndbcluster;
+create table t3(id int, c char(255)) engine=ndbcluster;
+create table t4(id int) engine=myisam;
+insert into t1 values (1);
+insert into t2 values (2, "table 2");
+insert into t3 values (3, "ndb table 3");
+insert into t4 values (4);
+flush tables;
+select * from t1, t2, t3, t4;
+id	id	b	id	c	id
+1	2	table 2	3	ndb table 3	4
+show status like 'handler_discover%';
+Variable_name	Value
+Handler_discover	3
+drop table t1, t2, t3, t4;
+flush status;
 show status like 'handler_discover%';
 Variable_name	Value
 Handler_discover	0

mysql-test/t/ndb_autodiscover.test

 -- source include/have_ndb.inc
 
 --disable_warnings
-drop table if exists t1,t2,t3,t4,t5,t6,t9;
+drop table if exists t1,t2,t3,t4,t5,t6,t7,t8,t9;
 --enable_warnings
 
 ################################################
@@ -122,7 +122,6 @@ create table t3(
 # IF NOT EXISTS wasn't specified
 
 show status like 'handler_discover%';
-SHOW TABLES FROM test;
 
 # now it should be discovered
 create table IF NOT EXISTS t3(
@@ -145,38 +144,226 @@ show status like 'handler_discover%';
 
 drop table t3;
 
+##################################################
+# Test that a table that already exists in NDB 
+# is discovered when SHOW TABLES
+# is used
+#
+
+flush status;
+
+create table t7(
+  id int not null primary key,
+  name char(255)
+) engine=ndb;
+create table t6(
+  id int not null primary key,
+  name char(255)
+) engine=MyISAM;
+insert into t7 values (1, "Explorer");
+insert into t6 values (2, "MyISAM table");
+select * from t7;
+show status like 'handler_discover%';
+
+# Remove the frm file from disk
+flush tables;
+system rm var/master-data/test/t7.frm ;
+
+show tables from test;
+show status like 'handler_discover%';
+
+# Remove the frm file from disk again
+flush tables;
+system rm var/master-data/test/t7.frm ;
+
+--replace_column 7 # 8 # 9 # 12 # 13 # 15 #
+show table status;
+show status like 'handler_discover%';
+
+drop table t6, t7;
+
+
 #######################################################
-# Test that a table that already exists as frm file
-# but not in NDB can be deleted from disk.
+# Test that a table that has been dropped from NDB
+# but still exists on disk, get a consistent error message
+# saying "No such table existed"
 #
 
-# Manual test
-#flush status;
+flush status;
+
+create table t4(
+  id int not null primary key,
+  name char(27)
+) engine=ndb;
+insert into t4 values (1, "Automatic");
+select * from t4;
+
+# Remove the table from NDB
+system exec $NDB_TOOLS_DIR/ndb_drop_table -d test t4 > /dev/null ; 
+
 #
-#create table t4(
-#  id int not null primary key,
-#  name char(27)
-#) engine=ndb;
-#insert into t4 values (1, "Automatic");
-#select * from t4;
+# Test that correct error is returned
+--error 1146
+select * from t4;
+--error 1146
+select * from t4;
+
+show status like 'handler_discover%';
+drop table t4;
+
+
+#######################################################
+# Test that a table that has been dropped from NDB
+# but still exists on disk is deleted from disk 
+# when SHOW TABLES is called
 #
+
+flush status;
+
+create table t4(
+  id int not null primary key,
+  id2 int,
+  name char(27)
+) engine=ndb;
+insert into t4 values (1, 76, "Automatic2");
+select * from t4;
+flush tables;
+
 # Remove the table from NDB
-#system drop_tab -c "$NDB_CONNECTSTRING2" -d test t4 > /dev/null ;
-#system drop_tab -c "host=localhost:2200;nodeid=5" -d test t4 > /dev/null ;
+system exec $NDB_TOOLS_DIR/ndb_drop_table -d test t4 > /dev/null ; 
+
+SHOW TABLES;
+
+--error 1146
+select * from t4;
+
+#######################################################
+# Test SHOW TABLES ability to detect new and delete old
+# tables. Test all at once using many tables
 #
-#--error 1296
-#select * from t4;
+
+flush status;
+
+# Create tables
+create table t1(id int) engine=ndbcluster;
+create table t2(id int, b char(255)) engine=myisam;
+create table t3(id int, c char(255)) engine=ndbcluster;
+create table t4(id int) engine=myisam;
+create table t5(id int, d char(56)) engine=ndbcluster;
+create table t6(id int) engine=ndbcluster;
+create table t7(id int) engine=ndbcluster;
+create table t8(id int, e char(34)) engine=myisam;
+create table t9(id int) engine=myisam;
+
+# Populate tables
+insert into t2 values (2, "myisam table 2");
+insert into t3 values (3, "ndb table 3");
+insert into t5 values (5, "ndb table 5");
+insert into t6 values (6);
+insert into t8 values (8, "myisam table 8");
+insert into t9 values (9);
+
+# Remove t3, t5 from NDB
+system exec $NDB_TOOLS_DIR/ndb_drop_table -d test t3 > /dev/null  ;
+system exec $NDB_TOOLS_DIR/ndb_drop_table -d test t5 > /dev/null  ;
+# Remove t6, t7 from disk
+system rm var/master-data/test/t6.frm > /dev/null ; 
+system rm var/master-data/test/t7.frm > /dev/null ; 
+
+SHOW TABLES;
+
+select * from t6;
+select * from t7;
+
+show status like 'handler_discover%';
+
+drop table t1, t2, t4, t6, t7, t8, t9;
+
+#######################################################
+# Test SHOW TABLES LIKE ability to detect new and delete old
+# tables. Test all at once using many tables.
 #
-#flush table t4;
-#--error 1016
-#select * from t4;
+
+flush status;
+
+# Create tables
+create table t1(id int) engine=ndbcluster;
+create table t2(id int, b char(255)) engine=myisam;
+create table t3(id int, c char(255)) engine=ndbcluster;
+create table t4(id int) engine=myisam;
+create table t5(id int, d char(56)) engine=ndbcluster;
+create table t6(id int) engine=ndbcluster;
+create table t7(id int) engine=ndbcluster;
+create table t8(id int, e char(34)) engine=myisam;
+create table t9(id int) engine=myisam;
+
+# Populate tables
+insert into t2 values (2, "myisam table 2");
+insert into t3 values (3, "ndb table 3");
+insert into t5 values (5, "ndb table 5");
+insert into t6 values (6);
+insert into t8 values (8, "myisam table 8");
+insert into t9 values (9);
+
+# Remove t3, t5 from NDB
+system exec $NDB_TOOLS_DIR/ndb_drop_table -d test t3 > /dev/null  ;
+system exec $NDB_TOOLS_DIR/ndb_drop_table -d test t5 > /dev/null  ;
+# Remove t6, t7 from disk
+system rm var/master-data/test/t6.frm > /dev/null ; 
+system rm var/master-data/test/t7.frm > /dev/null ; 
+
+
+SHOW TABLES LIKE 't6';
+
+show status like 'handler_discover%';
+
+# Check that t3 or t5 can't be created
+# frm files for these tables is stilll on disk
+--error 1050
+create table t3(a int);
+--error 1050
+create table t5(a int);
+
+SHOW TABLES LIKE 't%';
+
+show status like 'handler_discover%';
+
+drop table t1, t2, t4, t6, t7, t8, t9;
+
+
+
+######################################################
+# Test that several tables can be discovered when 
+# one statement access several table at once.
 #
-#show status like 'handler_discover%';
-#drop table t4;
-#flush tables;
-#show tables;
-#--error 1146
-#select * from t4;
+
+flush status;
+
+# Create tables
+create table t1(id int) engine=ndbcluster;
+create table t2(id int, b char(255)) engine=ndbcluster;
+create table t3(id int, c char(255)) engine=ndbcluster;
+create table t4(id int) engine=myisam;
+
+# Populate tables
+insert into t1 values (1);
+insert into t2 values (2, "table 2");
+insert into t3 values (3, "ndb table 3");
+insert into t4 values (4);
+
+# Remove t1, t2, t3 from disk
+system rm var/master-data/test/t1.frm > /dev/null ; 
+system rm var/master-data/test/t2.frm > /dev/null ; 
+system rm var/master-data/test/t3.frm > /dev/null ; 
+flush tables;
+
+# Select from the table which only exists in NDB.
+select * from t1, t2, t3, t4;
+
+# 3 table should have been discovered
+show status like 'handler_discover%';
+
+drop table t1, t2, t3, t4;
 
 
 #########################################################
@@ -241,7 +428,6 @@ show status like 'handler_discover%';
 drop table t6;
 
 ######################################################
-# Simple test to show use of discover on startup
 # Note! This should always be the last step in this 
 # file, the table t9 will be used and dropped 
 # by ndb_autodiscover2
@@ -259,9 +445,7 @@ system rm var/master-data/test/t9.frm ;
 
 # Now leave test case, when ndb_autodiscover2 will  run, this 
 # MySQL Server will have been restarted because it has a 
-# ndb_autodiscover2-master.opt file. And thus the table should 
-# have been discovered by the "discover on startup" function.
+# ndb_autodiscover2-master.opt file.
+
+
 
-#TODO
-#SLECT * FROM t1, t2, t4;
-#handler discover 3;

mysql-test/t/ndb_autodiscover2.test

 -- source include/have_ndb.inc
 
 #
-# Simple test to show use of discover on startup
+# Simple test to show use of discover when the server has been restarted
 # The previous step has simply removed the frm file
 # from disk, but left the table in NDB
 #
 --sleep 3;
 select * from t9 order by a;
 
-# handler_discover should be zero
+# handler_discover should be 1
 show status like 'handler_discover%';
 
 drop table t9;
+
+

ndb/include/ndbapi/Ndb.hpp

@@ -1087,8 +1087,6 @@ public:
 
   int waitUntilReady(int timeout = 60);
 
-  void connected(Uint32 block_reference);
-  
   /** @} *********************************************************************/
 
   /** 
@@ -1447,6 +1445,9 @@ private:
   void setup(Ndb_cluster_connection *ndb_cluster_connection,
 	     const char* aCatalogName, const char* aSchemaName);
 
+  void connected(Uint32 block_reference);
+ 
+
   NdbConnection*  startTransactionLocal(Uint32 aPrio, Uint32 aFragmentId); 
 
 // Connect the connection object to the Database.

ndb/src/ndbapi/NdbDictionaryImpl.cpp

@@ -868,6 +868,8 @@ NdbDictInterface::dictSignal(NdbApiSignal* signal,
 			     const int noerrcodes,
 			     const int temporaryMask)
 {
+  DBUG_ENTER("NdbDictInterface::dictSignal");
+  DBUG_PRINT("enter", ("useMasterNodeId: %d", useMasterNodeId));
   for(Uint32 i = 0; i<RETRIES; i++){
     //if (useMasterNodeId == 0)
     m_buffer.clear();
@@ -887,7 +889,7 @@ NdbDictInterface::dictSignal(NdbApiSignal* signal,
     if(aNodeId == 0){
       m_error.code = 4009;
       m_transporter->unlock_mutex();
-      return -1;
+      DBUG_RETURN(-1);
     }
     {
       int r;
@@ -923,7 +925,7 @@ NdbDictInterface::dictSignal(NdbApiSignal* signal,
     
     if(m_waiter.m_state == NO_WAIT && m_error.code == 0){
       // Normal return
-      return 0;
+      DBUG_RETURN(0);
     }
     
     /**
@@ -946,9 +948,9 @@ NdbDictInterface::dictSignal(NdbApiSignal* signal,
 	continue;
     }
 
-    return -1;
+    DBUG_RETURN(-1);
   }
-  return -1; 
+  DBUG_RETURN(-1);
 }
 
 /*****************************************************************

ndb/src/ndbapi/TransporterFacade.cpp

@@ -942,6 +942,8 @@ TransporterFacade::isConnected(NodeId aNodeId){
 NodeId
 TransporterFacade::get_an_alive_node()
 {
+  DBUG_ENTER("TransporterFacade::get_an_alive_node");
+  DBUG_PRINT("enter", ("theStartNodeId: %d", theStartNodeId));
 #ifdef VM_TRACE
   const char* p = NdbEnv_GetEnv("NDB_ALIVE_NODE_ID", (char*)0, 0);
   if (p != 0 && *p != 0)
@@ -950,17 +952,19 @@ TransporterFacade::get_an_alive_node()
   NodeId i;
   for (i = theStartNodeId; i < MAX_NDB_NODES; i++) {
     if (get_node_alive(i)){
+      DBUG_PRINT("info", ("Node %d is alive", i));
       theStartNodeId = ((i + 1) % MAX_NDB_NODES);
-      return i;
+      DBUG_RETURN(i);
     }
   }
   for (i = 1; i < theStartNodeId; i++) {
     if (get_node_alive(i)){
+      DBUG_PRINT("info", ("Node %d is alive", i));
       theStartNodeId = ((i + 1) % MAX_NDB_NODES);
-      return i;
+      DBUG_RETURN(i);
     }
   }
-  return (NodeId)0;
+  DBUG_RETURN((NodeId)0);
 }
 
 TransporterFacade::ThreadData::ThreadData(Uint32 size){

ndb/src/ndbapi/ndb_cluster_connection.cpp

@@ -67,6 +67,9 @@ void Ndb_cluster_connection::connect_thread()
       printf("Ndb_cluster_connection::connect_thread error\n");
       DBUG_ASSERT(false);
       g_run_connect_thread= 0;
+    } else {
+      // Wait before making a new connect attempt
+      NdbSleep_SecSleep(1);
     }
   } while (g_run_connect_thread);
   if (m_connect_callback)

sql/discover.cc

@@ -125,47 +125,4 @@ int writefrm(const char *name, const void *frmdata, uint len)
 
 
 
-/*
-  Try to discover table from handler and 
-  if found, write the frm file to disk.
-  
-  RETURN VALUES:
-   0 : Table existed in handler and created 
-       on disk if so requested
-   1 : Table does not exist
-  >1 : error
-
-*/
 
-int create_table_from_handler(const char *db, 
-			      const char *name,
-			      bool create_if_found)
-{
-  int error= 0;  
-  const void* frmblob = NULL;
-  char path[FN_REFLEN];
-  uint frmlen = 0;
-  DBUG_ENTER("create_table_from_handler");
-  DBUG_PRINT("enter", ("create_if_found: %d", create_if_found));
-
-  if (ha_discover(db, name, &frmblob, &frmlen))
-    DBUG_RETURN(1); // Table does not exist
-
-  // Table exists in handler  
-  if  (create_if_found)
-  {
-    (void)strxnmov(path,FN_REFLEN,mysql_data_home,"/",db,"/",name,NullS);
-    // Save the frm file    
-    error = writefrm(path, frmblob, frmlen);
-  }
-    
-  if (frmblob)
-    my_free((char*) frmblob,MYF(0));
-  DBUG_RETURN(error);  
-}
-
-int table_exists_in_handler(const char *db, 
-			     const char *name)
-{ 
-  return (create_table_from_handler(db, name, false) == 0);
-}

sql/ha_ndbcluster.h

@@ -226,6 +226,8 @@ class ha_ndbcluster: public handler
   int ndb_err(NdbConnection*);
   bool uses_blob_value(bool all_fields);
 
+  int write_ndb_file();
+
  private:
   int check_ndb_connection();
 
@@ -276,8 +278,11 @@ int ndbcluster_rollback(THD *thd, void* ndb_transaction);
 
 void ndbcluster_close_connection(THD *thd);
 
-int ndbcluster_discover(const char* dbname, const char* name,
+int ndbcluster_discover(THD* thd, const char* dbname, const char* name,
 			const void** frmblob, uint* frmlen);
+int ndbcluster_find_files(THD *thd,const char *db,const char *path,
+			  const char *wild, bool dir, List<char> *files);
+int ndbcluster_table_exists(THD* thd, const char *db, const char *name);
 int ndbcluster_drop_database(const char* path);
 
 void ndbcluster_print_error(int error, const NdbOperation *error_op);

sql/handler.cc

@@ -1119,6 +1119,16 @@ void handler::print_error(int error, myf errflag)
   case HA_ERR_NO_REFERENCED_ROW:
     textno=ER_NO_REFERENCED_ROW;
     break;
+  case HA_ERR_NO_SUCH_TABLE:
+  {
+    char *db;
+    char buff[FN_REFLEN];
+    uint length=dirname_part(buff,table->path);
+    buff[length-1]=0;
+    db=buff+dirname_length(buff);
+    my_error(ER_NO_SUCH_TABLE,MYF(0),db,table->table_name);
+    break;
+  }
   default:
     {
       /* The error was "unknown" to this function.
@@ -1265,6 +1275,71 @@ int ha_create_table(const char *name, HA_CREATE_INFO *create_info,
   DBUG_RETURN(error != 0);
 }
 
+/*
+  Try to discover table from engine and 
+  if found, write the frm file to disk.
+  
+  RETURN VALUES:
+   0 : Table existed in engine and created 
+       on disk if so requested
+   1 : Table does not exist
+  >1 : error
+
+*/
+
+int ha_create_table_from_engine(THD* thd, 
+				const char *db, 
+				const char *name,
+				bool create_if_found)
+{
+  int error= 0;  
+  const void* frmblob = NULL;
+  uint frmlen = 0;
+  char path[FN_REFLEN];
+  HA_CREATE_INFO create_info;
+  TABLE table;
+  DBUG_ENTER("ha_create_table_from_engine");
+  DBUG_PRINT("enter", ("db: %s, name: %s", db, name));
+  DBUG_PRINT("enter", ("create_if_found: %d", create_if_found));
+
+  bzero((char*) &create_info,sizeof(create_info));
+
+  if ((error= ha_discover(thd, db, name, &frmblob, &frmlen)))
+    DBUG_RETURN(error); 
+
+  // Table exists in handler  
+  if  (create_if_found)
+  {
+    (void)strxnmov(path,FN_REFLEN,mysql_data_home,"/",db,"/",name,NullS);
+    // Save the frm file    
+    if ((error = writefrm(path, frmblob, frmlen)))
+      goto err_end;
+
+    if (openfrm(path,"",0,(uint) READ_ALL, 0, &table))
+      DBUG_RETURN(1);
+
+    update_create_info_from_table(&create_info, &table);
+    create_info.table_options|= HA_CREATE_FROM_ENGINE;
+
+    if (lower_case_table_names == 2 &&
+	!(table.file->table_flags() & HA_FILE_BASED))
+    {
+      /* Ensure that handler gets name in lower case */
+      strmov(path, name);
+      my_casedn_str(files_charset_info, path);
+      name= path;
+    }
+    
+    error=table.file->create(path,&table,&create_info);
+    VOID(closefrm(&table));
+  }
+
+err_end:
+  if (frmblob)
+    my_free((char*) frmblob,MYF(0));
+  DBUG_RETURN(error);  
+}
+
 static int NEAR_F delete_file(const char *name,const char *ext,int extflag)
 {
   char buff[FN_REFLEN];
@@ -1372,15 +1447,15 @@ int ha_change_key_cache(KEY_CACHE *old_key_cache,
   Try to discover one table from handler(s)
 */
 
-int ha_discover(const char* dbname, const char* name,
+int ha_discover(THD* thd, const char* db, const char* name,
 		const void** frmblob, uint* frmlen)
 {
   int error= 1; // Table does not exist in any handler
   DBUG_ENTER("ha_discover");
-  DBUG_PRINT("enter", ("db: %s, name: %s", dbname, name));
+  DBUG_PRINT("enter", ("db: %s, name: %s", db, name));
 #ifdef HAVE_NDBCLUSTER_DB
   if (have_ndbcluster == SHOW_OPTION_YES)
-    error= ndbcluster_discover(dbname, name, frmblob, frmlen);
+    error= ndbcluster_discover(thd, db, name, frmblob, frmlen);
 #endif
   if (!error)
     statistic_increment(ha_discover_count,&LOCK_status);
@@ -1388,6 +1463,52 @@ int ha_discover(const char* dbname, const char* name,
 }
 
 
+/*
+  Call this function in order to give the handler the possiblity 
+  to ask engine if there are any new tables that should be written to disk 
+  or any dropped tables that need to be removed from disk
+*/
+
+int
+ha_find_files(THD *thd,const char *db,const char *path,
+	      const char *wild, bool dir, List<char> *files)
+{
+  int error= 0;
+  DBUG_ENTER("ha_find_files");
+  DBUG_PRINT("enter", ("db: %s, path: %s, wild: %s, dir: %d", 
+		       db, path, wild, dir));
+#ifdef HAVE_NDBCLUSTER_DB
+  if (have_ndbcluster == SHOW_OPTION_YES)
+    error= ndbcluster_find_files(thd, db, path, wild, dir, files);
+#endif
+  DBUG_RETURN(error);
+  
+  
+}
+
+/*
+  Ask handler if the table exists in engine
+
+  RETURN
+    0                   Table does not exist
+    1                   Table exists
+    #                   Error code
+
+ */
+int ha_table_exists(THD* thd, const char* db, const char* name)
+{
+  int error= 2;
+  DBUG_ENTER("ha_table_exists");
+  DBUG_PRINT("enter", ("db: %s, name: %s", db, name));
+#ifdef HAVE_NDBCLUSTER_DB
+  if (have_ndbcluster == SHOW_OPTION_YES)
+    error= ndbcluster_table_exists(thd, db, name);
+#endif
+  DBUG_RETURN(error);
+}
+
+
+
 /*
   Read first row between two ranges.
   Store ranges for future calls to read_range_next

sql/handler.h

@@ -540,6 +540,8 @@ void ha_close_connection(THD* thd);
 enum db_type ha_checktype(enum db_type database_type);
 int ha_create_table(const char *name, HA_CREATE_INFO *create_info,
 		    bool update_create_info);
+int ha_create_table_from_engine(THD* thd, const char *db, const char *name,
+				bool create_if_found);
 int ha_delete_table(enum db_type db_type, const char *path);
 void ha_drop_database(char* path);
 int ha_init_key_cache(const char *name, KEY_CACHE *key_cache);
@@ -561,5 +563,10 @@ bool ha_flush_logs(void);
 int ha_enable_transaction(THD *thd, bool on);
 int ha_change_key_cache(KEY_CACHE *old_key_cache,
 			KEY_CACHE *new_key_cache);
-int ha_discover(const char* dbname, const char* name,
+int ha_discover(THD* thd, const char* dbname, const char* name,
 		const void** frmblob, uint* frmlen);
+int ha_find_files(THD *thd,const char *db,const char *path,
+		  const char *wild, bool dir,List<char>* files);
+int ha_table_exists(THD* thd, const char* db, const char* name);
+
+

sql/mysql_priv.h

@@ -1003,8 +1003,6 @@ int openfrm(const char *name,const char *alias,uint filestat,uint prgflag,
 	    uint ha_open_flags, TABLE *outparam);
 int readfrm(const char *name, const void** data, uint* length);
 int writefrm(const char* name, const void* data, uint len);
-int create_table_from_handler(const char *db, const char *name,
-			      bool create_if_found);
 int closefrm(TABLE *table);
 db_type get_table_type(const char *name);
 int read_string(File file, gptr *to, uint length);

sql/sql_base.cc

@@ -1343,7 +1343,7 @@ static int open_unireg_entry(THD *thd, TABLE *entry, const char *db,
       */
       if (discover_retry_count++ != 0)
        goto err;
-      if (create_table_from_handler(db, name, true) != 0)
+      if (ha_create_table_from_engine(thd, db, name, true) != 0)
        goto err;
 
       thd->clear_error(); // Clear error message

sql/sql_show.cc

@@ -374,6 +374,7 @@ mysql_find_files(THD *thd,List<char> *files, const char *db,const char *path,
 
   if (wild && !wild[0])
     wild=0;
+
   bzero((char*) &table_list,sizeof(table_list));
 
   if (!(dirp = my_dir(path,MYF(MY_WME | (dir ? MY_WANT_STAT : 0)))))
@@ -445,6 +446,9 @@ mysql_find_files(THD *thd,List<char> *files, const char *db,const char *path,
   }
   DBUG_PRINT("info",("found: %d files", files->elements));
   my_dirend(dirp);
+
+  VOID(ha_find_files(thd,db,path,wild,dir,files));
+
   DBUG_RETURN(0);
 }
 

sql/sql_table.cc

@@ -222,7 +222,8 @@ int mysql_rm_table_part2(THD *thd, TABLE_LIST *tables, bool if_exists,
       strxmov(path, mysql_data_home, "/", db, "/", alias, reg_ext, NullS);
       (void) unpack_filename(path,path);
     }
-    if (drop_temporary || access(path,F_OK))
+    if (drop_temporary || 
+	(access(path,F_OK) && ha_create_table_from_engine(thd,db,alias,true)))
     {
       if (if_exists)
 	push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_NOTE,
@@ -1243,7 +1244,7 @@ int mysql_create_table(THD *thd,const char *db, const char *table_name,
   {
     bool create_if_not_exists =
       create_info->options & HA_LEX_CREATE_IF_NOT_EXISTS;
-    if (!create_table_from_handler(db, table_name,
+    if (!ha_create_table_from_engine(thd, db, table_name,
 				     create_if_not_exists))
     {
       DBUG_PRINT("info", ("Table already existed in handler"));

sql/table.cc

@@ -705,6 +705,14 @@ int openfrm(const char *name, const char *alias, uint db_stat, uint prgflag,
       outparam->crashed=((err == HA_ERR_CRASHED_ON_USAGE) &&
 			 outparam->file->auto_repair() &&
 			 !(ha_open_flags & HA_OPEN_FOR_REPAIR));
+
+      if (err==HA_ERR_NO_SUCH_TABLE)
+      {
+	/* The table did not exists in storage engine, use same error message
+	   as if the .frm file didn't exist */
+	error= 1;
+	my_errno= ENOENT;
+      }
       goto err_not_open; /* purecov: inspected */
     }
   }