diff options
Diffstat (limited to 'heap/hp_rfirst.c')
| -rw-r--r-- | heap/hp_rfirst.c | 42 |
1 files changed, 37 insertions, 5 deletions
diff --git a/heap/hp_rfirst.c b/heap/hp_rfirst.c index 9a1f09244a0..1668376ed1c 100644 --- a/heap/hp_rfirst.c +++ b/heap/hp_rfirst.c @@ -18,11 +18,43 @@ /* Read first record with the current key */ -int heap_rfirst(HP_INFO *info, byte *record) +int heap_rfirst(HP_INFO *info, byte *record, int inx) { + HP_SHARE *share = info->s; + HP_KEYDEF *keyinfo = share->keydef + inx; + DBUG_ENTER("heap_rfirst"); - info->current_record=0; - info->current_hash_ptr=0; - info->update=HA_STATE_PREV_FOUND; - DBUG_RETURN(heap_rnext(info,record)); + info->lastinx= inx; + if (keyinfo->algorithm == HA_KEY_ALG_BTREE) + { + byte *pos; + + if ((pos = tree_search_edge(&keyinfo->rb_tree, info->parents, + &info->last_pos, offsetof(TREE_ELEMENT, left)))) + { + memcpy(&pos, pos + (*keyinfo->get_key_length)(keyinfo, pos), + sizeof(byte*)); + info->current_ptr = pos; + memcpy(record, pos, (size_t)share->reclength); + info->update = HA_STATE_AKTIV; + } + else + { + my_errno = HA_ERR_END_OF_FILE; + DBUG_RETURN(my_errno); + } + DBUG_RETURN(0); + } + else + { + if (!(info->s->records)) + { + my_errno=HA_ERR_END_OF_FILE; + DBUG_RETURN(my_errno); + } + info->current_record=0; + info->current_hash_ptr=0; + info->update=HA_STATE_PREV_FOUND; + DBUG_RETURN(heap_rnext(info,record)); + } } |