Automatic primary key for BDB tables

BitKeeper/etc/logging_ok

-monty@tik.mysql.com
+monty@donna.mysql.com

Docs/manual.texi

@@ -1793,16 +1793,20 @@ Big changes made in @strong{MySQL} Version 3.22.12.
 @item @strong{MyODBC} (uses ODBC SDK 2.5) --- Gamma
 It seems to work well with some programs.
 
-@item Replication -- Alpha
+@item Replication -- Alpha / Beta
 We are still working on replication, so don't expect this to be rock
 solid yet.  On the other hand, some @strong{MySQL} users are already
 using this with good results.
 
-@item BDB Tables -- Alpha
+@item BDB Tables -- Alpha  / Beta
 The Berkeley DB code is very stable, but we are still improving the interface
 between @strong{MySQL} and BDB tables, so it will take some time before this
 is as tested as the other table types.
 
+@item Automatic recovery of MyISAM tables - Alpha.
+This only affects the new code that checks if the table was closed properly
+on open and executes an automatic check/repair of the table if it wasn't.
+
 @end table
 
 MySQL AB provides e-mail support for paying customers, but the @strong{MySQL}
@@ -7979,12 +7983,10 @@ you should also compile your code to be multi-threaded!
 @node Windows and BDB tables., Windows vs Unix, Windows compiling, Windows
 @subsection Windows and BDB Tables
 
-We are working on removing the requirement that one must have a primary
-key in a BDB table. As soon as this is fixed we will throughly test the
-BDB interface by running the @strong{MySQL} benchmark and our internal
-test suite on it.  When the above is done we will start to release binary
-distributions (for Windows and UNIX) of @strong{MySQL} that will include
-support for BDB tables.
+We will shortly do a full test on the new BDB interface on Windows.
+When this is done we will start to release binary distributions (for
+Windows and UNIX) of @strong{MySQL} that will include support for BDB
+tables.
 
 @cindex Windows, versus UNIX
 @cindex operating systems, Windows versus UNIX
@@ -21876,13 +21878,22 @@ Some characteristic of @code{BDB} tables:
 
 @itemize @bullet
 @item
-All @code{BDB} tables must have a primary key.
+@strong{MySQL} requires a @code{PRIMARY KEY} in each BDB table to be
+able to refer to previously read rows; If you don't create on,
+@strong{MySQL} will create an maintain a hidden @code{PRIMARY KEY} for
+you.  The hidden key has a length of 5 bytes and is incremented for each
+insert attempt.
 @item
 If all columns you access in a @code{BDB} tables is part of the same index or
 part of the the primary key then @strong{MySQL} can execute the query
 without having to access the actual row.  In a @code{MyISAM} table the
 above holds only if the columns are part of the same index.
 @item
+The @code{PRIMARY KEY} will be faster than any other key, as the
+@code{PRIMARY KEY} is stored together with the row data.  As the other keys are
+stored as the key data + the @code{PRIMARY KEY}, its important to keep the
+@code{PRIMARY KEY} as short as possible to save disk and get better speed.
+@item
 @code{LOCK TABLES} works on @code{BDB} tables as with other tables.  If
 you don't use @code{LOCK TABLE}, @strong{MYSQL} will issue an internal
 multiple write lock on the table to ensure that the table will be
@@ -37972,6 +37983,11 @@ though, so 3.23 is not released as a stable version yet.
 @appendixsubsec Changes in release 3.23.26
 @itemize @bullet
 @item
+If one don't create a @code{PRIMARY KEY} in a BDB table, a hidden
+@code{PRIMARY KEY} will be created.
+@item
+Added read-only-key optimization to BDB tables.
+@item
 @code{LEFT JOIN} did in some case prefer a full table scan when one
 didn't have a @code{WHERE} clause.
 @item

sql/field.h

@@ -44,7 +44,7 @@ public:
   uint8		null_bit;		// And position to it
   struct st_table *table;		// Pointer for table
   ulong query_id;			// For quick test of used fields
-  key_map key_start,part_of_key;	// Which keys a field is in
+  key_map key_start,part_of_key;	// Key is part of these keys.
   const char *table_name,*field_name;
   utype unireg_check;
   uint32 field_length;			// Length of field

sql/filesort.cc

@@ -331,7 +331,7 @@ static ha_rows find_all_keys(SORTPARAM *param, SQL_SELECT *select,
   if (! indexfile && ! quick_select)
   {
     file->reset();			// QQ; Shouldn't be needed
-    if (table->keyread)			// QQ Can be removed after the reset
+    if (sort_form->key_read)		// QQ Can be removed after the reset
       file->extra(HA_EXTRA_KEYREAD);	// QQ is removed
     next_pos=(byte*) 0;			/* Find records in sequence */
     file->rnd_init();

sql/ha_berkeley.cc

@@ -21,13 +21,12 @@
   - Don't automaticly pack all string keys (To do this we need to modify
     CREATE TABLE so that one can use the pack_keys argument per key).
   - An argument to pack_key that we don't want compression.
-  - Interaction with LOCK TABLES (Monty will fix this)
   - DB_DBT_USERMEN should be used for fixed length tables
     We will need an updated Berkeley DB version for this.
   - Killing threads that has got a 'deadlock'
   - SHOW TABLE STATUS should give more information about the table.
   - Get a more accurate count of the number of rows.
-  - Introduce hidden primary keys for tables without a primary key
+    We could store the found number of rows when the table is scanned.
   - We will need a manager thread that calls flush_logs, removes old
     logs and makes checkpoints at given intervals.
   - When not using UPDATE IGNORE, don't make a sub transaction but abort
@@ -203,6 +202,14 @@ const char **ha_berkeley::bas_ext() const
 { static const char *ext[]= { ha_berkeley_ext, NullS }; return ext; }
 
 
+static int
+berkeley_cmp_hidden_key(const DBT *new_key, const DBT *saved_key)
+{
+  ulonglong a=uint5korr((char*) new_key->data);
+  ulonglong b=uint5korr((char*) saved_key->data);
+  return  a < b ? -1 : (a > b ? 1 : 0); 
+}
+
 static int
 berkeley_cmp_packed_key(const DBT *new_key, const DBT *saved_key)
 {
@@ -232,6 +239,8 @@ berkeley_cmp_packed_key(const DBT *new_key, const DBT *saved_key)
 }
 
 
+/* The following is not yet used; Should be used for fixed length keys */
+
 static int
 berkeley_cmp_fix_length_key(const DBT *new_key, const DBT *saved_key)
 {
@@ -261,19 +270,30 @@ int ha_berkeley::open(const char *name, int mode, uint test_if_locked)
   int error;
   DBUG_ENTER("ha_berkeley::open");
 
+  /* Open primary key */
+  hidden_primary_key=0;
+  if ((primary_key=table->primary_key) >= MAX_KEY)
+  {						// No primary key
+    primary_key=table->keys;
+    fixed_length_primary_key=1;
+    ref_length=hidden_primary_key=BDB_HIDDEN_PRIMARY_KEY_LENGTH;
+  }
+  key_used_on_scan=primary_key;
+
   /* Need some extra memory in case of packed keys */
   uint max_key_length= table->max_key_length + MAX_REF_PARTS*2;
   if (!(alloc_ptr=
 	my_multi_malloc(MYF(MY_WME),
-			&key_file, table->keys*sizeof(*key_file),
-			&key_type, table->keys*sizeof(u_int32_t),
+			&key_file, (table->keys+1)*sizeof(*key_file),
+			&key_type, (table->keys+1)*sizeof(u_int32_t),
 			&key_buff,  max_key_length,
 			&key_buff2, max_key_length,
 			&primary_key_buff,
-			table->key_info[table->primary_key].key_length,
+			(hidden_primary_key ? 0 :
+			 table->key_info[table->primary_key].key_length),
 			NullS)))
     DBUG_RETURN(1);
-  if (!(rec_buff=my_malloc((alloced_rec_buff_length=table->reclength),
+  if (!(rec_buff=my_malloc((alloced_rec_buff_length=table->rec_buff_length),
 			   MYF(MY_WME))))
   {
     my_free(alloc_ptr,MYF(0));
@@ -298,8 +318,9 @@ int ha_berkeley::open(const char *name, int mode, uint test_if_locked)
     DBUG_RETURN(1);
   }
 
-  /* Open primary key */
-  file->set_bt_compare(file, berkeley_cmp_packed_key);
+  file->set_bt_compare(file,
+		       (hidden_primary_key ? berkeley_cmp_hidden_key :
+			berkeley_cmp_packed_key));
   if ((error=(file->open(file, fn_format(name_buff,name,"", ha_berkeley_ext,
 					 2 | 4),
 			 "main", DB_BTREE, open_mode,0))))
@@ -314,26 +335,19 @@ int ha_berkeley::open(const char *name, int mode, uint test_if_locked)
   info(HA_STATUS_NO_LOCK | HA_STATUS_VARIABLE | HA_STATUS_CONST);
   transaction=0;
   cursor=0;
-
+  key_read=0;
   fixed_length_row=!(table->db_create_options & HA_OPTION_PACK_RECORD);
 
   /* Open other keys */
   bzero((char*) key_file,sizeof(*key_file)*table->keys);
-  if ((key_used_on_scan=primary_key=table->primary_key) < MAX_KEY)
-    key_file[primary_key]=file;
-  else						// No primary key
-  {
-    hidden_primary_key=1;
-    if (!share->primary_key_inited)
-      update_auto_primary_key();
-  }
+  key_file[primary_key]=file;
+  key_type[primary_key]=DB_NOOVERWRITE;
   bzero((char*) &current_row,sizeof(current_row));
 
   DB **ptr=key_file;
   for (uint i=0, used_keys=0; i < table->keys ; i++, ptr++)
   {
     char part[7];
-    key_type[i]=table->key_info[i].flags & HA_NOSAME ? DB_NOOVERWRITE : 0;
     if (i != primary_key)
     {
       if ((error=db_create(ptr, db_env, 0)))
@@ -343,6 +357,7 @@ int ha_berkeley::open(const char *name, int mode, uint test_if_locked)
 	DBUG_RETURN(1);
       }
       sprintf(part,"key%02d",++used_keys);
+      key_type[i]=table->key_info[i].flags & HA_NOSAME ? DB_NOOVERWRITE : 0;
       (*ptr)->set_bt_compare(*ptr, berkeley_cmp_packed_key);
       if (!(table->key_info[i].flags & HA_NOSAME))
 	(*ptr)->set_flags(*ptr, DB_DUP);
@@ -355,28 +370,34 @@ int ha_berkeley::open(const char *name, int mode, uint test_if_locked)
       }
     }
   }
+
+  /* Calculate pack_length of primary key */
+  if (!hidden_primary_key)
+  {
+    ref_length=0;
+    KEY_PART_INFO *key_part= table->key_info[primary_key].key_part;
+    KEY_PART_INFO *end=key_part+table->key_info[primary_key].key_parts;
+    for ( ; key_part != end ; key_part++)
+      ref_length+= key_part->field->max_packed_col_length(key_part->length);
+    fixed_length_primary_key=
+      (ref_length == table->key_info[primary_key].key_length);
+  }
+  else
+  {
+    if (!share->primary_key_inited)
+      update_auto_primary_key();
+  }
   DBUG_RETURN(0);
 }
 
 
-void ha_berkeley::initialize(void)
-{
-  /* Calculate pack_length of primary key */
-  ref_length=0;
-  KEY_PART_INFO *key_part= table->key_info[primary_key].key_part;
-  KEY_PART_INFO *end=key_part+table->key_info[primary_key].key_parts;
-  for ( ; key_part != end ; key_part++)
-    ref_length+= key_part->field->max_packed_col_length(key_part->length);
-  fixed_length_primary_key=
-    (ref_length == table->key_info[primary_key].key_length);
-}    
-
 int ha_berkeley::close(void)
 {
   int error,result=0;
+  uint keys=table->keys + test(hidden_primary_key);
   DBUG_ENTER("ha_berkeley::close");
 
-  for (uint i=0; i < table->keys; i++)
+  for (uint i=0; i < keys; i++)
   {
     if (key_file[i] && (error=key_file[i]->close(key_file[i],0)))
       result=error;
@@ -427,13 +448,20 @@ ulong ha_berkeley::max_row_length(const byte *buf)
   pre-allocated.
 */
 
-int ha_berkeley::pack_row(DBT *row, const byte *record)
+int ha_berkeley::pack_row(DBT *row, const byte *record, bool new_row)
 {
   bzero((char*) row,sizeof(*row));
   if (fixed_length_row)
   {
     row->data=(void*) record;
-    row->size=table->reclength;
+    row->size=table->reclength+hidden_primary_key;
+    if (hidden_primary_key)
+    {
+      if (new_row)
+	get_auto_primary_key(current_ident);
+      memcpy_fixed((char*) record+table->reclength, (char*) current_ident,
+		   BDB_HIDDEN_PRIMARY_KEY_LENGTH);
+    }
     return 0;
   }
   if (table->blob_fields)
@@ -448,6 +476,15 @@ int ha_berkeley::pack_row(DBT *row, const byte *record)
 
   for (Field **field=table->field ; *field ; field++)
     ptr=(byte*) (*field)->pack((char*) ptr,record + (*field)->offset());
+
+  if (hidden_primary_key)
+  {
+    if (new_row)
+      get_auto_primary_key(current_ident);
+    memcpy_fixed((char*) ptr, (char*) current_ident,
+		 BDB_HIDDEN_PRIMARY_KEY_LENGTH);
+    ptr+=BDB_HIDDEN_PRIMARY_KEY_LENGTH;
+  }
   row->data=rec_buff;
   row->size= (size_t) (ptr - rec_buff);
   return 0;
@@ -457,7 +494,7 @@ int ha_berkeley::pack_row(DBT *row, const byte *record)
 void ha_berkeley::unpack_row(char *record, DBT *row)
 {
   if (fixed_length_row)
-    memcpy(record,row->data,table->reclength);
+    memcpy(record,(char*) row->data,table->reclength+hidden_primary_key);
   else
   {
     /* Copy null bits */
@@ -470,6 +507,37 @@ void ha_berkeley::unpack_row(char *record, DBT *row)
 }
 
 
+/* Store the key and the primary key into the row */
+
+void ha_berkeley::unpack_key(char *record, DBT *key, uint index)
+{
+  KEY *key_info=table->key_info+index;
+  KEY_PART_INFO *key_part= key_info->key_part,
+                *end=key_part+key_info->key_parts;
+
+  char *pos=(char*) key->data;
+  for ( ; key_part != end; key_part++)
+  {
+    if (key_part->null_bit)
+    {
+      if (!*pos++)				// Null value
+      {
+	/*
+	  We don't need to reset the record data as we will not access it
+	  if the null data is set
+	*/
+
+	record[key_part->null_offset]|=key_part->null_bit;
+	continue;
+      }
+      record[key_part->null_offset]&= ~key_part->null_bit;
+    }
+    pos= (char*) key_part->field->unpack(record + key_part->field->offset(),
+					 pos);
+  }
+}
+
+
 /*
   Create a packed key from from a row
   This will never fail as the key buffer is pre allocated.
@@ -478,12 +546,20 @@ void ha_berkeley::unpack_row(char *record, DBT *row)
 DBT *ha_berkeley::pack_key(DBT *key, uint keynr, char *buff,
 			   const byte *record)
 {
+  bzero((char*) key,sizeof(*key));
+
+  if (hidden_primary_key && keynr == primary_key)
+  {
+    key->data=current_ident;
+    key->size=BDB_HIDDEN_PRIMARY_KEY_LENGTH;
+    return key;
+  }
+
   KEY *key_info=table->key_info+keynr;
   KEY_PART_INFO *key_part=key_info->key_part;
   KEY_PART_INFO *end=key_part+key_info->key_parts;
   DBUG_ENTER("pack_key");
 
-  bzero((char*) key,sizeof(*key));
   key->data=buff;
   key->app_private= key_info;
 
@@ -561,7 +637,7 @@ int ha_berkeley::write_row(byte * record)
     update_timestamp(record+table->time_stamp-1);
   if (table->next_number_field && record == table->record[0])
     update_auto_increment();
-  if ((error=pack_row(&row, record)))
+  if ((error=pack_row(&row, record,1)))
     DBUG_RETURN(error);
 
   if (table->keys == 1)
@@ -678,7 +754,7 @@ int ha_berkeley::update_primary_key(DB_TXN *trans, bool primary_key_changed,
     pack_key(&old_key, primary_key, key_buff2, old_row);
     if ((error=remove_key(trans, primary_key, old_row, (DBT *) 0, &old_key)))
       DBUG_RETURN(error);			// This should always succeed
-    if ((error=pack_row(&row, new_row)))
+    if ((error=pack_row(&row, new_row, 0)))
     {
       // Out of memory (this shouldn't happen!) 
       (void) file->put(file, trans, &old_key, &row,
@@ -697,7 +773,7 @@ int ha_berkeley::update_primary_key(DB_TXN *trans, bool primary_key_changed,
   else
   {
     // Primary key didn't change;  just update the row data
-    if ((error=pack_row(&row, new_row)))
+    if ((error=pack_row(&row, new_row, 0)))
       DBUG_RETURN(error);
       error=file->put(file, trans, prim_key, &row, 0);
     if (error)
@@ -719,12 +795,24 @@ int ha_berkeley::update_row(const byte * old_row, byte * new_row)
   statistic_increment(ha_update_count,&LOCK_status);
   if (table->time_stamp)
     update_timestamp(new_row+table->time_stamp-1);
-  pack_key(&prim_key, primary_key, key_buff, new_row);
-  
-  if ((primary_key_changed=key_cmp(primary_key, old_row, new_row)))
-    pack_key(&old_prim_key, primary_key, primary_key_buff, old_row);
-  else
+
+  if (hidden_primary_key)
+  {
+    primary_key_changed=0;
+    bzero((char*) &prim_key,sizeof(prim_key));
+    prim_key.data= (void*) current_ident;
+    prim_key.size=BDB_HIDDEN_PRIMARY_KEY_LENGTH;
     old_prim_key=prim_key;
+  }
+  else
+  {
+    pack_key(&prim_key, primary_key, key_buff, new_row);
+  
+    if ((primary_key_changed=key_cmp(primary_key, old_row, new_row)))
+      pack_key(&old_prim_key, primary_key, primary_key_buff, old_row);
+    else
+      old_prim_key=prim_key;
+  }
 
   LINT_INIT(error);
   for (uint retry=0 ; retry < berkeley_trans_retry ; retry++)
@@ -869,9 +957,12 @@ int ha_berkeley::delete_row(const byte * record)
   DBUG_ENTER("delete_row");
   statistic_increment(ha_delete_count,&LOCK_status);
     
-  if ((error=pack_row(&row, record)))
+  if ((error=pack_row(&row, record, 0)))
     DBUG_RETURN((error));
   pack_key(&prim_key, primary_key, key_buff, record);
+  if (hidden_primary_key)
+    keys|= (key_map) 1 << primary_key;
+
   for (uint retry=0 ; retry < berkeley_trans_retry ; retry++)
   {
     DB_TXN *sub_trans;
@@ -934,7 +1025,7 @@ int ha_berkeley::index_end()
 /* What to do after we have read a row based on an index */
 
 int ha_berkeley::read_row(int error, char *buf, uint keynr, DBT *row,
-			  bool read_next)
+			  DBT *found_key, bool read_next)
 {
   DBUG_ENTER("read_row");
   if (error)
@@ -944,9 +1035,22 @@ int ha_berkeley::read_row(int error, char *buf, uint keynr, DBT *row,
     table->status=STATUS_NOT_FOUND;
     DBUG_RETURN(error);
   }
-
+  if (hidden_primary_key)
+    memcpy_fixed(current_ident,
+		 (char*) row->data+row->size-BDB_HIDDEN_PRIMARY_KEY_LENGTH,
+		 BDB_HIDDEN_PRIMARY_KEY_LENGTH);
+  table->status=0;
   if (keynr != primary_key)
   {
+    /* We only found the primary key.  Now we have to use this to find
+       the row data */
+    if (key_read && found_key)
+    {
+      unpack_key(buf,found_key,keynr);
+      if (!hidden_primary_key)
+	unpack_key(buf,row,primary_key);
+      DBUG_RETURN(0);
+    }
     DBT key;
     bzero((char*) &key,sizeof(key));
     key.data=key_buff2;
@@ -963,7 +1067,6 @@ int ha_berkeley::read_row(int error, char *buf, uint keynr, DBT *row,
     row= &current_row;
   }
   unpack_row(buf,row);
-  table->status=0;
   DBUG_RETURN(0);
 }
 
@@ -980,7 +1083,7 @@ int ha_berkeley::index_read_idx(byte * buf, uint keynr, const byte * key,
 				 pack_key(&last_key, keynr, key_buff, key,
 					  key_len),
 				 &current_row,0),
-		       buf, keynr, &current_row, 0));
+		       buf, keynr, &current_row, &last_key, 0));
 }
 
 
@@ -999,7 +1102,7 @@ int ha_berkeley::index_read(byte * buf, const byte * key,
 						  key_buff,
 						  key, key_len),
 				 &row, DB_SET),
-		   buf, active_index, &row, 0);
+		   buf, active_index, &row, (DBT*) 0, 0);
   }
   else
   {
@@ -1009,7 +1112,7 @@ int ha_berkeley::index_read(byte * buf, const byte * key,
     memcpy(key_buff2, key_buff, last_key.size);
     ((KEY*) last_key.app_private)->handler.bdb_return_if_eq= -1;
     error=read_row(cursor->c_get(cursor, &last_key, &row, DB_SET_RANGE),
-		   buf, active_index, &row, 0);
+		   buf, active_index, &row, (DBT*) 0, 0);
     ((KEY*) last_key.app_private)->handler.bdb_return_if_eq=0;
     if (!error && find_flag == HA_READ_KEY_EXACT)
     {
@@ -1030,7 +1133,7 @@ int ha_berkeley::index_next(byte * buf)
   statistic_increment(ha_read_next_count,&LOCK_status);
   bzero((char*) &row,sizeof(row));
   DBUG_RETURN(read_row(cursor->c_get(cursor, &last_key, &row, DB_NEXT),
-		       buf, active_index, &row ,1));
+		       buf, active_index, &row, &last_key, 1));
 }
 
 int ha_berkeley::index_next_same(byte * buf, const byte *key, uint keylen)
@@ -1042,11 +1145,11 @@ int ha_berkeley::index_next_same(byte * buf, const byte *key, uint keylen)
   bzero((char*) &row,sizeof(row));
   if (keylen == table->key_info[active_index].key_length)
     error=read_row(cursor->c_get(cursor, &last_key, &row, DB_NEXT_DUP),
-		   buf, active_index, &row,1);
+		   buf, active_index, &row, &last_key, 1);
   else
   {
     error=read_row(cursor->c_get(cursor, &last_key, &row, DB_NEXT),
-		   buf, active_index, &row,1);
+		   buf, active_index, &row, &last_key, 1);
     if (!error && ::key_cmp(table, key, active_index, keylen))
       error=HA_ERR_END_OF_FILE;
   }
@@ -1061,7 +1164,7 @@ int ha_berkeley::index_prev(byte * buf)
   statistic_increment(ha_read_prev_count,&LOCK_status);
   bzero((char*) &row,sizeof(row));
   DBUG_RETURN(read_row(cursor->c_get(cursor, &last_key, &row, DB_PREV),
-		       buf, active_index, &row,1));
+		       buf, active_index, &row, &last_key, 1));
 }
   
 
@@ -1072,7 +1175,7 @@ int ha_berkeley::index_first(byte * buf)
   statistic_increment(ha_read_first_count,&LOCK_status);
   bzero((char*) &row,sizeof(row));
   DBUG_RETURN(read_row(cursor->c_get(cursor, &last_key, &row, DB_FIRST),
-		       buf, active_index, &row,0));
+		       buf, active_index, &row, &last_key, 0));
 }
 
 int ha_berkeley::index_last(byte * buf)
@@ -1082,7 +1185,7 @@ int ha_berkeley::index_last(byte * buf)
   statistic_increment(ha_read_last_count,&LOCK_status);
   bzero((char*) &row,sizeof(row));
   DBUG_RETURN(read_row(cursor->c_get(cursor, &last_key, &row, DB_LAST),
-		  buf, active_index, &row,0));
+		       buf, active_index, &row, &last_key, 0));
 }
 
 int ha_berkeley::rnd_init(bool scan)
@@ -1103,7 +1206,7 @@ int ha_berkeley::rnd_next(byte *buf)
   statistic_increment(ha_read_rnd_next_count,&LOCK_status);
   bzero((char*) &row,sizeof(row));
   DBUG_RETURN(read_row(cursor->c_get(cursor, &last_key, &row, DB_NEXT),
-		       buf, active_index, &row, 1));
+		       buf, active_index, &row, &last_key, 1));
 }
 
 
@@ -1136,13 +1239,18 @@ int ha_berkeley::rnd_pos(byte * buf, byte *pos)
   return read_row(file->get(file, transaction,
 			    get_pos(&db_pos, pos),
 			    &current_row, 0),
-		  buf, active_index, &current_row,0);
+		  buf, active_index, &current_row, (DBT*) 0, 0);
 }
 
 void ha_berkeley::position(const byte *record)
 {
   DBT key;
-  pack_key(&key, primary_key, ref, record);
+  if (hidden_primary_key)
+  {
+    memcpy_fixed(ref, (char*) current_ident, BDB_HIDDEN_PRIMARY_KEY_LENGTH);
+  }
+  else
+    pack_key(&key, primary_key, ref, record);
 }
 
 
@@ -1162,11 +1270,27 @@ void ha_berkeley::info(uint flag)
 
 int ha_berkeley::extra(enum ha_extra_function operation)
 {
+  switch (operation) {
+  case HA_EXTRA_RESET:
+  case HA_EXTRA_RESET_STATE:
+    key_read=0;
+    break;
+  case HA_EXTRA_KEYREAD:
+    key_read=1;					// Query satisfied with key
+    break;
+  case HA_EXTRA_NO_KEYREAD:
+    key_read=0;
+    break;
+  default:
+    break;
+  }
   return 0;
 }
 
+
 int ha_berkeley::reset(void)
 {
+  key_read=0;					// Reset to state after open
   return 0;
 }
 
@@ -1280,6 +1404,7 @@ int ha_berkeley::create(const char *name, register TABLE *form,
 {
   char name_buff[FN_REFLEN];
   char part[7];
+  uint index=1;
   DBUG_ENTER("ha_berkeley::create");
 
   fn_format(name_buff,name,"", ha_berkeley_ext,2 | 4);
@@ -1288,14 +1413,18 @@ int ha_berkeley::create(const char *name, register TABLE *form,
   if (create_sub_table(name_buff,"main",DB_BTREE,0))
     DBUG_RETURN(1);
 
+  primary_key=table->primary_key;
   /* Create the keys */
-  for (uint i=1; i < form->keys; i++)
+  for (uint i=0; i < form->keys; i++)
   {
-    sprintf(part,"key%02d",i);
-    if (create_sub_table(name_buff, part, DB_BTREE,
-			 (table->key_info[i].flags & HA_NOSAME) ? 0 :
-			 DB_DUP))
-      DBUG_RETURN(1);
+    if (i != primary_key)
+    {
+      sprintf(part,"key%02d",index++);
+      if (create_sub_table(name_buff, part, DB_BTREE,
+			   (table->key_info[i].flags & HA_NOSAME) ? 0 :
+			   DB_DUP))
+	DBUG_RETURN(1);
+    }
   }
 
   /* Create the status block to save information from last status command */
@@ -1403,7 +1532,7 @@ static BDB_SHARE *get_share(const char *table_name)
 	return 0;
       }
       thr_lock_init(&share->lock);
-      pthread_mutex_init(&share->mutex);
+      pthread_mutex_init(&share->mutex,NULL);
     }
   }
   share->use_count++;
@@ -1427,17 +1556,17 @@ static void free_share(BDB_SHARE *share)
 
 void ha_berkeley::update_auto_primary_key()
 {
-  (void) extra(HA_EXTRA_KEYREAD);
   pthread_mutex_lock(&share->mutex);
   if (!share->primary_key_inited)
   {
+    (void) extra(HA_EXTRA_KEYREAD);
     index_init(primary_key);
     if (!index_last(table->record[1]))
-      share->auto_ident=current_ident;
+      share->auto_ident=uint5korr(current_ident);
     index_end();
+    (void) extra(HA_EXTRA_NO_KEYREAD);
   }
   pthread_mutex_unlock(&share->mutex);
-  (void) extra(HA_EXTRA_NO_KEYREAD);
 }
 
 #endif /* HAVE_BERKELEY_DB */

sql/ha_berkeley.h

@@ -23,15 +23,18 @@
 
 #include <db.h>
 
+#define BDB_HIDDEN_PRIMARY_KEY_LENGTH 5
+
 typedef struct st_berkeley_share {
   ulonglong auto_ident;
   THR_LOCK lock;
   pthread_mutex_t mutex;
   char *table_name;
   uint table_name_length,use_count;
-  my_bool inited;
+  bool primary_key_inited;
 } BDB_SHARE;
 
+
 class ha_berkeley: public handler
 {
   THR_LOCK_DATA lock;
@@ -46,13 +49,15 @@ class ha_berkeley: public handler
   BDB_SHARE *share;
   ulong int_option_flag;
   ulong alloced_rec_buff_length;
-  uint primary_key,last_dup_key;
-  bool fixed_length_row, fixed_length_primary_key, hidden_primary_key;
-
+  uint primary_key,last_dup_key, hidden_primary_key;
+  bool fixed_length_row, fixed_length_primary_key, key_read;
   bool  fix_rec_buff_for_blob(ulong length);
+  byte current_ident[BDB_HIDDEN_PRIMARY_KEY_LENGTH];
+
   ulong max_row_length(const byte *buf);
-  int pack_row(DBT *row,const  byte *record);
+  int pack_row(DBT *row,const  byte *record, bool new_row);
   void unpack_row(char *record, DBT *row);
+  void ha_berkeley::unpack_key(char *record, DBT *key, uint index);
   DBT *pack_key(DBT *key, uint keynr, char *buff, const byte *record);
   DBT *pack_key(DBT *key, uint keynr, char *buff, const byte *key_ptr,
 		uint key_length);
@@ -64,7 +69,7 @@ class ha_berkeley: public handler
   int update_primary_key(DB_TXN *trans, bool primary_key_changed,
 			 const byte * old_row, const byte * new_row,
 			 DBT *prim_key);
-  int read_row(int error, char *buf, uint keynr, DBT *row, bool);
+  int read_row(int error, char *buf, uint keynr, DBT *row, DBT *key, bool);
   DBT *get_pos(DBT *to, byte *pos);
 
  public:
@@ -72,9 +77,8 @@ class ha_berkeley: public handler
     int_option_flag(HA_READ_NEXT | HA_READ_PREV |
 		    HA_REC_NOT_IN_SEQ |
 		    HA_KEYPOS_TO_RNDPOS | HA_READ_ORDER | HA_LASTKEY_ORDER |
-		    HA_LONGLONG_KEYS | HA_NULL_KEY |
-		    HA_BLOB_KEY | 
-		    HA_REQUIRE_PRIMARY_KEY | HA_NOT_EXACT_COUNT | 
+		    HA_LONGLONG_KEYS | HA_NULL_KEY | HA_HAVE_KEY_READ_ONLY |
+		    HA_BLOB_KEY | HA_NOT_EXACT_COUNT | 
 		    HA_PRIMARY_KEY_IN_READ_INDEX | HA_DROP_BEFORE_CREATE),
     last_dup_key((uint) -1)
   {
@@ -84,14 +88,14 @@ class ha_berkeley: public handler
   const char **bas_ext() const;
   ulong option_flag() const { return int_option_flag; }
   uint max_record_length() const { return HA_MAX_REC_LENGTH; }
-  uint max_keys()          const { return MAX_KEY; }
+  uint max_keys()          const { return MAX_KEY-1; }
   uint max_key_parts()     const { return MAX_REF_PARTS; }
   uint max_key_length()    const { return MAX_KEY_LENGTH; }
+  uint extra_rec_buf_length() { return BDB_HIDDEN_PRIMARY_KEY_LENGTH; }
   bool fast_key_read()	   { return 1;}
   bool has_transactions()  { return 1;}
 
   int open(const char *name, int mode, uint test_if_locked);
-  void initialize(void);
   int close(void);
   double scan_time();
   int write_row(byte * buf);
@@ -129,6 +133,16 @@ class ha_berkeley: public handler
   int delete_table(const char *name);
   THR_LOCK_DATA **store_lock(THD *thd, THR_LOCK_DATA **to,
 			     enum thr_lock_type lock_type);
+
+  void update_auto_primary_key();
+  inline void get_auto_primary_key(byte *to)
+  {
+    ulonglong tmp;
+    pthread_mutex_lock(&share->mutex);
+    share->auto_ident++;
+    int5store(to,share->auto_ident);
+    pthread_mutex_unlock(&share->mutex);
+  }
 };
 
 extern bool berkeley_skip;

sql/handler.h

@@ -202,6 +202,7 @@ public:
   virtual double read_time(ha_rows rows) { return rows; }
   virtual bool fast_key_read() { return 0;}
   virtual bool has_transactions(){ return 0;}
+  virtual uint extra_rec_buf_length() { return 0; }
 
   virtual int index_init(uint idx) { active_index=idx; return 0;}
   virtual int index_end() {return 0; }

sql/opt_range.cc

@@ -2347,6 +2347,7 @@ bool QUICK_SELECT::unique_key_range()
 
 QUICK_SELECT *get_quick_select_for_ref(TABLE *table, TABLE_REF *ref)
 {
+  table->file->index_end();			// Remove old cursor
   QUICK_SELECT *quick=new QUICK_SELECT(table, ref->key, 1);
   KEY *key_info = &table->key_info[ref->key];
   KEY_PART *key_part;

sql/sql_base.cc

@@ -1413,11 +1413,17 @@ Field *find_field_in_table(THD *thd,TABLE *table,const char *name,uint length,
     if (field->query_id != thd->query_id)
     {
       field->query_id=thd->query_id;
-      field->table->used_fields++;
+      table->used_fields++;
+      if (field->part_of_key)
+      {
+	if (!(field->part_of_key & table->ref_primary_key))
+	  table->used_keys&=field->part_of_key;
+      }
+      else
+	table->used_keys=0;
     }
     else
       thd->dupp_field=field;
-    field->table->used_keys&=field->part_of_key;
   }
   if (check_grants && !thd->master_access && check_grant_column(thd,table,name,length))
     return WRONG_GRANT;
@@ -1659,19 +1665,19 @@ static bool
 insert_fields(THD *thd,TABLE_LIST *tables, const char *table_name,
 	      List_iterator<Item> *it)
 {
-  TABLE_LIST *table;
   uint found;
   DBUG_ENTER("insert_fields");
 
   found=0;
-  for (table=tables ; table ; table=table->next)
+  for (; tables ; tables=tables->next)
   {
+    TABLE *table=tables->table;
     if (grant_option && !thd->master_access &&
-	check_grant_all_columns(thd,SELECT_ACL,table->table) )
+	check_grant_all_columns(thd,SELECT_ACL,table) )
       DBUG_RETURN(-1);
-    if (!table_name || !strcmp(table_name,table->name))
+    if (!table_name || !strcmp(table_name,tables->name))
     {
-      Field **ptr=table->table->field,*field;
+      Field **ptr=table->field,*field;
       while ((field = *ptr++))
       {
 	Item_field *item= new Item_field(field);
@@ -1682,10 +1688,17 @@ insert_fields(THD *thd,TABLE_LIST *tables, const char *table_name,
 	if (field->query_id == thd->query_id)
 	  thd->dupp_field=field;
 	field->query_id=thd->query_id;
-	field->table->used_keys&=field->part_of_key;
+
+	if (field->part_of_key)
+	{
+	  if (!(field->part_of_key & table->ref_primary_key))
+	    table->used_keys&=field->part_of_key;
+	}
+	else
+	  table->used_keys=0;
       }
       /* All fields are used */
-      table->table->used_fields=table->table->fields;
+      table->used_fields=table->fields;
     }
   }
   if (!found)
@@ -1750,6 +1763,7 @@ int setup_conds(THD *thd,TABLE_LIST *tables,COND **conds)
 	// TODO: This could be optimized to use hashed names if t2 had a hash
 	for (j=0 ; j < t2->fields ; j++)
 	{
+	  key_map tmp_map;
 	  if (!my_strcasecmp(t1->field[i]->field_name,
 			     t2->field[j]->field_name))
 	  {
@@ -1760,8 +1774,20 @@ int setup_conds(THD *thd,TABLE_LIST *tables,COND **conds)
 	    tmp->fix_length_and_dec();	// Update cmp_type
 	    tmp->const_item_cache=0;
 	    cond_and->list.push_back(tmp);
-	    t1->used_keys&= t1->field[i]->part_of_key;
-	    t2->used_keys&= t2->field[j]->part_of_key;
+	    if ((tmp_map=t1->field[i]->part_of_key))
+	    {
+	      if (!(tmp_map & t1->ref_primary_key))
+		t1->used_keys&=tmp_map;
+	    }
+	    else
+	      t1->used_keys=0;
+	    if ((tmp_map=t2->field[j]->part_of_key))
+	    {
+	      if (!(tmp_map & t2->ref_primary_key))
+		t2->used_keys&=tmp_map;
+	    }
+	    else
+	      t2->used_keys=0;
 	    break;
 	  }
 	}

sql/sql_select.cc

@@ -2352,6 +2352,11 @@ make_join_readinfo(JOIN *join,uint options)
       break;
     case JT_EQ_REF:
       table->status=STATUS_NO_RECORD;
+      if (tab->select)
+      {
+	delete tab->select->quick;
+	tab->select->quick=0;
+      }
       delete tab->quick;
       tab->quick=0;
       table->file->index_init(tab->ref.key);
@@ -2365,6 +2370,11 @@ make_join_readinfo(JOIN *join,uint options)
       break;
     case JT_REF:
       table->status=STATUS_NO_RECORD;
+      if (tab->select)
+      {
+	delete tab->select->quick;
+	tab->select->quick=0;
+      }
       delete tab->quick;
       tab->quick=0;
       table->file->index_init(tab->ref.key);

sql/table.cc

@@ -207,49 +207,29 @@ int openfrm(const char *name, const char *alias, uint db_stat, uint prgflag,
   }
 #endif
 
+  /* Allocate handler */
   if (!(outparam->file= get_new_handler(outparam,outparam->db_type)))
     goto err_not_open;
-  error=2;
-  if (db_stat)
-  {
-    int err;
-    if ((err=(outparam->file->
-	      ha_open(index_file,
-		      (db_stat & HA_READ_ONLY ? O_RDONLY : O_RDWR),
-		      (db_stat & HA_OPEN_TEMPORARY ? HA_OPEN_TMP_TABLE :
-		       ((db_stat & HA_WAIT_IF_LOCKED) ||
-			(specialflag & SPECIAL_WAIT_IF_LOCKED)) ?
-		       HA_OPEN_WAIT_IF_LOCKED :
-		       (db_stat & (HA_ABORT_IF_LOCKED | HA_GET_INFO)) ?
-		       HA_OPEN_ABORT_IF_LOCKED :
-		       HA_OPEN_IGNORE_IF_LOCKED) | ha_open_flags))))
-    {
-      /* Set a flag if the table is crashed and it can be auto. repaired */
-      outparam->crashed=(err == HA_ERR_CRASHED &&
-			 outparam->file->auto_repair() &&
-			 !(ha_open_flags & HA_OPEN_FOR_REPAIR));
-      goto err_not_open; /* purecov: inspected */
-    }
-  }
-  outparam->db_low_byte_first=outparam->file->low_byte_first();
 
   error=4;
   outparam->reginfo.lock_type= TL_UNLOCK;
   outparam->current_lock=F_UNLCK;
-  if (db_stat & HA_OPEN_KEYFILE || (prgflag & DELAYED_OPEN)) records=2;
+  if ((db_stat & HA_OPEN_KEYFILE) || (prgflag & DELAYED_OPEN)) records=2;
   else records=1;
   if (prgflag & (READ_ALL+EXTRA_RECORD)) records++;
-  rec_buff_length=ALIGN_SIZE(outparam->reclength+1);
+  /* QQ: TODO, remove the +1 from below */
+  rec_buff_length=ALIGN_SIZE(outparam->reclength+1+
+			     outparam->file->extra_rec_buf_length());
   if (!(outparam->record[0]= (byte*)
 	(record = (char *) alloc_root(&outparam->mem_root,
 				      rec_buff_length * records))))
-    goto err;					/* purecov: inspected */
+    goto err_not_open;				/* purecov: inspected */
   record[outparam->reclength]=0;		// For purify and ->c_ptr()
   outparam->rec_buff_length=rec_buff_length;
   if (my_pread(file,(byte*) record,(uint) outparam->reclength,
 	       (ulong) (uint2korr(head+6)+uint2korr(head+14)),
 	       MYF(MY_NABP)))
-    goto err; /* purecov: inspected */
+    goto err_not_open; /* purecov: inspected */
   for (i=0 ; i < records ; i++, record+=rec_buff_length)
   {
     outparam->record[i]=(byte*) record;
@@ -265,12 +245,12 @@ int openfrm(const char *name, const char *alias, uint db_stat, uint prgflag,
   }
 
   VOID(my_seek(file,pos,MY_SEEK_SET,MYF(0)));
-  if (my_read(file,(byte*) head,288,MYF(MY_NABP))) goto err;
+  if (my_read(file,(byte*) head,288,MYF(MY_NABP))) goto err_not_open;
   if (crypted)
   {
     crypted->decode((char*) head+256,288-256);
     if (sint2korr(head+284) != 0)		// Should be 0
-      goto err;					// Wrong password
+      goto err_not_open;			// Wrong password
   }
 
   outparam->fields= uint2korr(head+258);
@@ -292,13 +272,13 @@ int openfrm(const char *name, const char *alias, uint db_stat, uint prgflag,
 			   (outparam->fields+interval_parts+
 			    keys+3)*sizeof(my_string)+
 			   (n_length+int_length)))))
-    goto err; /* purecov: inspected */
+    goto err_not_open; /* purecov: inspected */
 
   outparam->field=field_ptr;
   read_length=((uint) (outparam->fields*11)+pos+
 	       (uint) (n_length+int_length));
   if (read_string(file,(gptr*) &disk_buff,read_length))
-    goto err; /* purecov: inspected */
+    goto err_not_open; /* purecov: inspected */
   if (crypted)
   {
     crypted->decode((char*) disk_buff,read_length);
@@ -321,6 +301,7 @@ int openfrm(const char *name, const char *alias, uint db_stat, uint prgflag,
   if (keynames)
     fix_type_pointers(&int_array,&outparam->keynames,1,&keynames);
   VOID(my_close(file,MYF(MY_WME)));
+  file= -1;
 
   record=(char*) outparam->record[0]-1;		/* Fieldstart = 1 */
   if (null_field_first)
@@ -426,7 +407,7 @@ int openfrm(const char *name, const char *alias, uint db_stat, uint prgflag,
 						(uint) key_part->length);
 #ifdef EXTRA_DEBUG
 	if (key_part->fieldnr > outparam->fields)
-	  goto err; // sanity check
+	  goto err_not_open; // sanity check
 #endif
 	if (key_part->fieldnr)
 	{					// Should always be true !
@@ -494,6 +475,12 @@ int openfrm(const char *name, const char *alias, uint db_stat, uint prgflag,
 	(outparam->keys_in_use & ((key_map) 1 << primary_key)))
     {
       outparam->primary_key=primary_key;
+      if (outparam->file->option_flag() & HA_PRIMARY_KEY_IN_READ_INDEX)
+	outparam->ref_primary_key= (key_map) 1 << primary_key;
+      /*
+	If we are using an integer as the primary key then allow the user to
+	refer to it as '_rowid'
+      */
       if (outparam->key_info[primary_key].key_parts == 1)
       {
 	Field *field= outparam->key_info[primary_key].key_part[0].field;
@@ -505,6 +492,7 @@ int openfrm(const char *name, const char *alias, uint db_stat, uint prgflag,
       outparam->primary_key = MAX_KEY; // we do not have a primary key
   }
   x_free((gptr) disk_buff);
+  disk_buff=0;
   if (new_field_pack_flag <= 1)
   {			/* Old file format with default null */
     uint null_length=(outparam->null_fields+7)/8;
@@ -523,7 +511,7 @@ int openfrm(const char *name, const char *alias, uint db_stat, uint prgflag,
 	  (Field_blob**) alloc_root(&outparam->mem_root,
 				    (uint) (outparam->blob_fields+1)*
 				    sizeof(Field_blob*))))
-      goto err;
+      goto err_not_open;
     for (ptr=outparam->field ; *ptr ; ptr++)
     {
       if ((*ptr)->flags & BLOB_FLAG)
@@ -535,22 +523,43 @@ int openfrm(const char *name, const char *alias, uint db_stat, uint prgflag,
     outparam->blob_field=
       (Field_blob**) (outparam->field+outparam->fields); // Point at null ptr
 
+  /* The table struct is now initialzed;  Open the table */
+  error=2;
+  if (db_stat)
+  {
+    int err;
+    if ((err=(outparam->file->
+	      ha_open(index_file,
+		      (db_stat & HA_READ_ONLY ? O_RDONLY : O_RDWR),
+		      (db_stat & HA_OPEN_TEMPORARY ? HA_OPEN_TMP_TABLE :
+		       ((db_stat & HA_WAIT_IF_LOCKED) ||
+			(specialflag & SPECIAL_WAIT_IF_LOCKED)) ?
+		       HA_OPEN_WAIT_IF_LOCKED :
+		       (db_stat & (HA_ABORT_IF_LOCKED | HA_GET_INFO)) ?
+		       HA_OPEN_ABORT_IF_LOCKED :
+		       HA_OPEN_IGNORE_IF_LOCKED) | ha_open_flags))))
+    {
+      /* Set a flag if the table is crashed and it can be auto. repaired */
+      outparam->crashed=(err == HA_ERR_CRASHED &&
+			 outparam->file->auto_repair() &&
+			 !(ha_open_flags & HA_OPEN_FOR_REPAIR));
+      goto err_not_open; /* purecov: inspected */
+    }
+  }
+  outparam->db_low_byte_first=outparam->file->low_byte_first();
+
   my_pthread_setspecific_ptr(THR_MALLOC,old_root);
   opened_tables++;
 #ifndef DBUG_OFF
   if (use_hash)
     (void) hash_check(&outparam->name_hash);
 #endif
-  if (db_stat)
-    outparam->file->initialize();
   DBUG_RETURN (0);
 
- err:
-  if (outparam->file && db_stat)
-    (void) outparam->file->close();
  err_not_open:
   x_free((gptr) disk_buff);
-  VOID(my_close(file,MYF(MY_WME)));
+  if (file > 0)
+    VOID(my_close(file,MYF(MY_WME)));
 
  err_end:					/* Here when no file */
   delete crypted;

sql/table.h

@@ -113,7 +113,7 @@ struct st_table {
   byte		*record_pointers;		/* If sorted in memory */
   ha_rows	found_records;			/* How many records in sort */
   ORDER		*group;
-  key_map	quick_keys,used_keys;
+  key_map	quick_keys, used_keys, ref_primary_key;
   ha_rows	quick_rows[MAX_KEY];
   uint		quick_key_parts[MAX_KEY];
   key_part_map  const_key_parts[MAX_KEY];