Merge mysql.com:/home/svoj/devel/bk/mysql-5.0

into  mysql.com:/home/svoj/devel/mysql/merge/mysql-5.0-engines


mysql-test/r/symlink.result:
  Auto merged
mysql-test/t/symlink.test:
  Auto merged
sql/table.cc:
  Auto merged
mysql-test/r/myisam.result:
  Manually merged.
mysql-test/t/myisam.test:
  Manually merged.

include/thr_lock.h

@@ -121,6 +121,7 @@ typedef struct st_thr_lock {
   void (*get_status)(void*, int);	/* When one gets a lock */
   void (*copy_status)(void*,void*);
   void (*update_status)(void*);		/* Before release of write */
+  void (*restore_status)(void*);         /* Before release of read */
   my_bool (*check_status)(void *);
 } THR_LOCK;
 

myisam/mi_create.c

@@ -815,18 +815,19 @@ uint mi_get_pointer_length(ulonglong file_length, uint def)
   if (file_length)				/* If not default */
   {
 #ifdef NOT_YET_READY_FOR_8_BYTE_POINTERS
-    if (file_length >= (longlong) 1 << 56)
+    if (file_length >= ULL(1) << 56)
       def=8;
+    else
 #endif
-    if (file_length >= (longlong) 1 << 48)
+    if (file_length >= ULL(1) << 48)
       def=7;
-    if (file_length >= (longlong) 1 << 40)
+    else if (file_length >= ULL(1) << 40)
       def=6;
-    else if (file_length >= (longlong) 1 << 32)
+    else if (file_length >= ULL(1) << 32)
       def=5;
-    else if (file_length >= (1L << 24))
+    else if (file_length >= ULL(1) << 24)
       def=4;
-    else if (file_length >= (1L << 16))
+    else if (file_length >= ULL(1) << 16)
       def=3;
     else
       def=2;

myisam/mi_dynrec.c

@@ -80,7 +80,7 @@ int _mi_write_blob_record(MI_INFO *info, const byte *record)
 #endif
   if (!(rec_buff=(byte*) my_alloca(reclength)))
   {
-    my_errno=ENOMEM;
+    my_errno= HA_ERR_OUT_OF_MEM; /* purecov: inspected */
     return(-1);
   }
   reclength2= _mi_rec_pack(info,rec_buff+ALIGN_SIZE(MI_MAX_DYN_BLOCK_HEADER),
@@ -114,7 +114,7 @@ int _mi_update_blob_record(MI_INFO *info, my_off_t pos, const byte *record)
 #endif
   if (!(rec_buff=(byte*) my_alloca(reclength)))
   {
-    my_errno=ENOMEM;
+    my_errno= HA_ERR_OUT_OF_MEM; /* purecov: inspected */
     return(-1);
   }
   reclength=_mi_rec_pack(info,rec_buff+ALIGN_SIZE(MI_MAX_DYN_BLOCK_HEADER),

myisam/mi_locking.c

@@ -325,6 +325,15 @@ void mi_update_status(void* param)
   }
 }
 
+
+void mi_restore_status(void *param)
+{
+  MI_INFO *info= (MI_INFO*) param;
+  info->state= &info->s->state.state;
+  info->append_insert_at_end= 0;
+}
+
+
 void mi_copy_status(void* to,void *from)
 {
   ((MI_INFO*) to)->state= &((MI_INFO*) from)->save_state;

myisam/mi_open.c

@@ -322,7 +322,13 @@ MI_INFO *mi_open(const char *name, int mode, uint open_flags)
 	for (j=0 ; j < share->keyinfo[i].keysegs; j++,pos++)
 	{
 	  disk_pos=mi_keyseg_read(disk_pos, pos);
-
+          if (pos->flag & HA_BLOB_PART &&
+              ! (share->options & (HA_OPTION_COMPRESS_RECORD |
+                                   HA_OPTION_PACK_RECORD)))
+          {
+            my_errno= HA_ERR_CRASHED;
+            goto err;
+          }
 	  if (pos->type == HA_KEYTYPE_TEXT ||
               pos->type == HA_KEYTYPE_VARTEXT1 ||
               pos->type == HA_KEYTYPE_VARTEXT2)
@@ -440,6 +446,13 @@ MI_INFO *mi_open(const char *name, int mode, uint open_flags)
       offset+=share->rec[i].length;
     }
     share->rec[i].type=(int) FIELD_LAST;	/* End marker */
+    if (offset > share->base.reclength)
+    {
+      /* purecov: begin inspected */
+      my_errno= HA_ERR_CRASHED;
+      goto err;
+      /* purecov: end */
+    }
 
     if (! lock_error)
     {
@@ -504,6 +517,7 @@ MI_INFO *mi_open(const char *name, int mode, uint open_flags)
 	share->lock.get_status=mi_get_status;
 	share->lock.copy_status=mi_copy_status;
 	share->lock.update_status=mi_update_status;
+        share->lock.restore_status= mi_restore_status;
 	share->lock.check_status=mi_check_status;
       }
     }

myisam/mi_update.c

@@ -196,7 +196,8 @@ err:
   save_errno=my_errno;
   if (changed)
     key_changed|= HA_STATE_CHANGED;
-  if (my_errno == HA_ERR_FOUND_DUPP_KEY || my_errno == HA_ERR_RECORD_FILE_FULL)
+  if (my_errno == HA_ERR_FOUND_DUPP_KEY || my_errno == HA_ERR_OUT_OF_MEM ||
+      my_errno == HA_ERR_RECORD_FILE_FULL)
   {
     info->errkey= (int) i;
     flag=0;

myisam/mi_write.c

@@ -168,7 +168,7 @@ int mi_write(MI_INFO *info, byte *record)
 err:
   save_errno=my_errno;
   if (my_errno == HA_ERR_FOUND_DUPP_KEY || my_errno == HA_ERR_RECORD_FILE_FULL ||
-      my_errno == HA_ERR_NULL_IN_SPATIAL)
+      my_errno == HA_ERR_NULL_IN_SPATIAL || my_errno == HA_ERR_OUT_OF_MEM)
   {
     if (info->bulk_insert)
     {

myisam/myisamdef.h

@@ -731,6 +731,7 @@ int mi_unique_comp(MI_UNIQUEDEF *def, const byte *a, const byte *b,
 		   my_bool null_are_equal);
 void mi_get_status(void* param, int concurrent_insert);
 void mi_update_status(void* param);
+void mi_restore_status(void* param);
 void mi_copy_status(void* to,void *from);
 my_bool mi_check_status(void* param);
 void mi_disable_non_unique_index(MI_INFO *info, ha_rows rows);

mysql-test/r/myisam.result

@@ -922,6 +922,27 @@ SET @@myisam_repair_threads=1;
 SHOW VARIABLES LIKE 'myisam_repair%';
 Variable_name	Value
 myisam_repair_threads	1
+CREATE TABLE t1(a VARCHAR(16));
+INSERT INTO t1 VALUES('aaaaaaaa'),(NULL);
+UPDATE t1 AS ta1, t1 AS ta2 SET ta1.a='aaaaaaaaaaaaaaaa';
+SELECT * FROM t1;
+a
+aaaaaaaaaaaaaaaa
+aaaaaaaaaaaaaaaa
+DROP TABLE t1;
+CREATE TABLE t1(a INT);
+INSERT INTO t1 VALUES(1),(2);
+UPDATE t1,t1 AS t2 SET t1.a=t1.a+2 WHERE t1.a=t2.a-1;
+SELECT * FROM t1 ORDER BY a;
+a
+2
+3
+DROP TABLE t1;
+CREATE TABLE t1 (c1 TEXT) AVG_ROW_LENGTH=70100 MAX_ROWS=4100100100;
+SHOW TABLE STATUS LIKE 't1';
+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
+t1	MyISAM	10	Dynamic	X	X	X	72057594037927935	X	X	X	X	X	X	latin1_swedish_ci	X	max_rows=4100100100 avg_row_length=70100	
+DROP TABLE t1;
 End of 4.1 tests
 set storage_engine=MyISAM;
 drop table if exists t1,t2,t3;

mysql-test/t/myisam.test

@@ -847,6 +847,33 @@ DROP TABLE t1;
 SET @@myisam_repair_threads=1;
 SHOW VARIABLES LIKE 'myisam_repair%';
 
+#
+# BUG#21310 - Trees in SQL causing a "crashed" table with MyISAM storage
+#             engine
+#
+
+# A simplified test case that reflect crashed table issue.
+CREATE TABLE t1(a VARCHAR(16));
+INSERT INTO t1 VALUES('aaaaaaaa'),(NULL);
+UPDATE t1 AS ta1, t1 AS ta2 SET ta1.a='aaaaaaaaaaaaaaaa';
+SELECT * FROM t1;
+DROP TABLE t1;
+
+# A test case that reflect wrong result set.
+CREATE TABLE t1(a INT);
+INSERT INTO t1 VALUES(1),(2);
+UPDATE t1,t1 AS t2 SET t1.a=t1.a+2 WHERE t1.a=t2.a-1;
+SELECT * FROM t1 ORDER BY a;
+DROP TABLE t1;
+
+#
+# Bug#24607 - MyISAM pointer size determined incorrectly
+#
+CREATE TABLE t1 (c1 TEXT) AVG_ROW_LENGTH=70100 MAX_ROWS=4100100100;
+--replace_column 5 X 6 X 7 X 9 X 10 X 11 X 12 X 13 X 14 X 16 X
+SHOW TABLE STATUS LIKE 't1';
+DROP TABLE t1;
+
 --echo End of 4.1 tests
 
 

mysys/thr_lock.c

@@ -757,8 +757,16 @@ void thr_unlock(THR_LOCK_DATA *data)
   }
   else
     lock->write.last=data->prev;
-  if (lock_type >= TL_WRITE_CONCURRENT_INSERT && lock->update_status)
-    (*lock->update_status)(data->status_param);
+  if (lock_type >= TL_WRITE_CONCURRENT_INSERT)
+  {
+    if (lock->update_status)
+      (*lock->update_status)(data->status_param);
+  }
+  else
+  {
+    if (lock->restore_status)
+      (*lock->restore_status)(data->status_param);
+  }
   if (lock_type == TL_READ_NO_INSERT)
     lock->read_no_write_count--;
   data->type=TL_UNLOCK;				/* Mark unlocked */

sql/sql_update.cc

@@ -24,8 +24,6 @@
 #include "sp_head.h"
 #include "sql_trigger.h"
 
-static bool safe_update_on_fly(JOIN_TAB *join_tab, List<Item> *fields);
-
 /* Return 0 if row hasn't changed */
 
 static bool compare_record(TABLE *table, query_id_t query_id)
@@ -1040,27 +1038,73 @@ int multi_update::prepare(List<Item> &not_used_values,
   for (i=0 ; i < table_count ; i++)
     set_if_bigger(max_fields, fields_for_table[i]->elements);
   copy_field= new Copy_field[max_fields];
+  DBUG_RETURN(thd->is_fatal_error != 0);
+}
 
-  /*
-    Mark all copies of tables that are updates to ensure that
-    init_read_record() will not try to enable a cache on them
 
-    The problem is that for queries like
+/*
+  Check if table is safe to update on fly
 
-    UPDATE t1, t1 AS t2 SET t1.b=t2.c WHERE t1.a=t2.a;
+  SYNOPSIS
+    safe_update_on_fly()
+    thd                 Thread handler
+    join_tab            How table is used in join
+    all_tables          List of tables
+    fields              Fields that are updated
 
-    the row buffer may contain things that doesn't match what is on disk
-    which will cause an error when reading a row.
-    (This issue is mostly relevent for MyISAM tables)
-  */
-  for (table_ref= leaves;  table_ref; table_ref= table_ref->next_leaf)
-  {
-    TABLE *table=table_ref->table;
-    if ((tables_to_update & table->map) &&
-        unique_table(thd, table_ref, update_tables))
-      table->no_cache= 1;			// Disable row cache
+  NOTES
+    We can update the first table in join on the fly if we know that
+    a row in this table will never be read twice. This is true under
+    the following conditions:
+
+    - We are doing a table scan and the data is in a separate file (MyISAM) or
+      if we don't update a clustered key.
+
+    - We are doing a range scan and we don't update the scan key or
+      the primary key for a clustered table handler.
+
+    - Table is not joined to itself.
+
+    When checking for above cases we also should take into account that
+    BEFORE UPDATE trigger potentially may change value of any field in row
+    being updated.
+
+  WARNING
+    This code is a bit dependent of how make_join_readinfo() works.
+
+  RETURN
+    0		Not safe to update
+    1		Safe to update
+*/
+
+static bool safe_update_on_fly(THD *thd, JOIN_TAB *join_tab,
+                               TABLE_LIST *table_ref, TABLE_LIST *all_tables,
+                               List<Item> *fields)
+{
+  TABLE *table= join_tab->table;
+  if (unique_table(thd, table_ref, all_tables))
+    return 0;
+  switch (join_tab->type) {
+  case JT_SYSTEM:
+  case JT_CONST:
+  case JT_EQ_REF:
+    return TRUE;				// At most one matching row
+  case JT_REF:
+  case JT_REF_OR_NULL:
+    return !is_key_used(table, join_tab->ref.key, *fields);
+  case JT_ALL:
+    /* If range search on index */
+    if (join_tab->quick)
+      return !join_tab->quick->is_keys_used(fields);
+    /* If scanning in clustered key */
+    if ((table->file->table_flags() & HA_PRIMARY_KEY_IN_READ_INDEX) &&
+	table->s->primary_key < MAX_KEY)
+      return !is_key_used(table, table->s->primary_key, *fields);
+    return TRUE;
+  default:
+    break;					// Avoid compler warning
   }
-  DBUG_RETURN(thd->is_fatal_error != 0);
+  return FALSE;
 }
 
 
@@ -1098,7 +1142,8 @@ multi_update::initialize_tables(JOIN *join)
       table->file->extra(HA_EXTRA_IGNORE_DUP_KEY);
     if (table == main_table)			// First table in join
     {
-      if (safe_update_on_fly(join->join_tab, &temp_fields))
+      if (safe_update_on_fly(thd, join->join_tab, table_ref, all_tables,
+                             &temp_fields))
       {
 	table_to_update= main_table;		// Update table on the fly
 	continue;
@@ -1149,63 +1194,6 @@ multi_update::initialize_tables(JOIN *join)
   DBUG_RETURN(0);
 }
 
-/*
-  Check if table is safe to update on fly
-
-  SYNOPSIS
-    safe_update_on_fly
-    join_tab		How table is used in join
-    fields		Fields that are updated
-
-  NOTES
-    We can update the first table in join on the fly if we know that
-    a row in this table will never be read twice. This is true under
-    the following conditions:
-
-    - We are doing a table scan and the data is in a separate file (MyISAM) or
-      if we don't update a clustered key.
-
-    - We are doing a range scan and we don't update the scan key or
-      the primary key for a clustered table handler.
-
-    When checking for above cases we also should take into account that
-    BEFORE UPDATE trigger potentially may change value of any field in row
-    being updated.
-
-  WARNING
-    This code is a bit dependent of how make_join_readinfo() works.
-
-  RETURN
-    0		Not safe to update
-    1		Safe to update
-*/
-
-static bool safe_update_on_fly(JOIN_TAB *join_tab, List<Item> *fields)
-{
-  TABLE *table= join_tab->table;
-  switch (join_tab->type) {
-  case JT_SYSTEM:
-  case JT_CONST:
-  case JT_EQ_REF:
-    return TRUE;				// At most one matching row
-  case JT_REF:
-  case JT_REF_OR_NULL:
-    return !is_key_used(table, join_tab->ref.key, *fields);
-  case JT_ALL:
-    /* If range search on index */
-    if (join_tab->quick)
-      return !join_tab->quick->is_keys_used(fields);
-    /* If scanning in clustered key */
-    if ((table->file->table_flags() & HA_PRIMARY_KEY_IN_READ_INDEX) &&
-	table->s->primary_key < MAX_KEY)
-      return !is_key_used(table, table->s->primary_key, *fields);
-    return TRUE;
-  default:
-    break;					// Avoid compler warning
-  }
-  return FALSE;
-}
-
 
 multi_update::~multi_update()
 {

sql/table.cc

@@ -452,6 +452,8 @@ int openfrm(THD *thd, const char *name, const char *alias, uint db_stat,
   memcpy(comment_pos, disk_buff+read_length-com_length, com_length);
 
   fix_type_pointers(&int_array, &share->fieldnames, 1, &names);
+  if (share->fieldnames.count != share->fields)
+    goto err;
   fix_type_pointers(&int_array, share->intervals, interval_count,
 		    &names);