Commit 8c8b6479 authored by gshchepa/uchum@gleb.loc's avatar gshchepa/uchum@gleb.loc
Browse files

Merge gleb.loc:/home/uchum/work/bk/4.1 

into  gleb.loc:/home/uchum/work/bk/4.1-opt
parents 0e8292c9 bab42982

mysys/hash.c

+19 −0
Original line number Diff line number Diff line
@@ -572,6 +572,25 @@ my_bool hash_update(HASH *hash,byte *record,byte *old_key,uint old_key_length) 
    previous->next=pos->next;		/* unlink pos */



  /* Move data to correct position */

  if (new_index == empty)

  {

    /*

      At this point record is unlinked from the old chain, thus it holds

      random position. By the chance this position is equal to position

      for the first element in the new chain. That means updated record

      is the only record in the new chain.

    */

    if (empty != idx)

    {

      /*

        Record was moved while unlinking it from the old chain.

        Copy data to a new position.

      */

      data[empty]= org_link;

    }

    data[empty].next= NO_RECORD;

    DBUG_RETURN(0);

  }

  pos=data+new_index;

  new_pos_index=hash_rec_mask(hash,pos,blength,records);

  if (new_index != new_pos_index)