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support for HA_READ_BEFORE_KEY and HA_READ_PREFIX_LAST_OR_PREV

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unknown
2002-11-27 19:32:47 +04:00
parent dd7e533b38
commit 8c603386d2
1 changed files with 17 additions and 0 deletions
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17
sql/ha_berkeley.cc
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@ -1416,10 +1416,21 @@ int ha_berkeley::index_read(byte * buf, const byte * key,
DBT row; DBT row;
int error; int error;
KEY *key_info= &table->key_info[active_index]; KEY *key_info= &table->key_info[active_index];
int do_prev= 0;
DBUG_ENTER("ha_berkeley::index_read"); DBUG_ENTER("ha_berkeley::index_read");
statistic_increment(ha_read_key_count,&LOCK_status); statistic_increment(ha_read_key_count,&LOCK_status);
bzero((char*) &row,sizeof(row)); bzero((char*) &row,sizeof(row));
if (find_flag == HA_READ_BEFORE_KEY)
{
find_flag= HA_READ_KEY_OR_NEXT;
do_prev= 1;
}
else if (find_flag == HA_READ_PREFIX_LAST_OR_PREV)
{
find_flag= HA_READ_AFTER_KEY;
do_prev= 1;
}
if (key_len == key_info->key_length) if (key_len == key_info->key_length)
{ {
error=read_row(cursor->c_get(cursor, pack_key(&last_key, error=read_row(cursor->c_get(cursor, pack_key(&last_key,
@ -1453,6 +1464,12 @@ int ha_berkeley::index_read(byte * buf, const byte * key,
error=HA_ERR_KEY_NOT_FOUND; error=HA_ERR_KEY_NOT_FOUND;
} }
} }
if (do_prev)
{
bzero((char*) &row, sizeof(row));
error= read_row(cursor->c_get(cursor, &last_key, &row, DB_PREV),
(char*) buf, active_index, &row, &last_key, 1);
}
DBUG_RETURN(error); DBUG_RETURN(error);
} }