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addresses #893

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implement read_range_first to grab range read lock

git-svn-id: file:///svn/mysql/tokudb-engine/src@4405 c7de825b-a66e-492c-adef-691d508d4ae1
This commit is contained in:
Zardosht Kasheff 2013-04-17 00:01:42 -04:00 committed by Yoni Fogel
parent 7a4c1582b2
commit fba3028aa4
1 changed files with 60 additions and 1 deletions
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61
storage/tokudb/ha_tokudb.cc
View file

@ -2738,7 +2738,66 @@ int ha_tokudb::read_range_first(
bool eq_range,
bool sorted)
{
return handler::read_range_first(start_key, end_key, eq_range, sorted);
TOKUDB_DBUG_ENTER("ha_tokudb::read_range_first");
int error;
DBT start_dbt_key;
const DBT* start_dbt_data = NULL;
DBT end_dbt_key;
const DBT* end_dbt_data = NULL;
uchar start_key_buff [table_share->max_key_length + MAX_REF_PARTS * 3];
uchar end_key_buff [table_share->max_key_length + MAX_REF_PARTS * 3];
bzero((void *) &start_dbt_key, sizeof(start_dbt_key));
bzero((void *) &end_dbt_key, sizeof(end_dbt_key));
if (start_key) {
pack_key(&start_dbt_key, active_index, start_key_buff, start_key->key, start_key->length);
switch (start_key->flag) {
case HA_READ_AFTER_KEY:
start_dbt_data = share->key_file[active_index]->dbt_pos_infty();
break;
default:
start_dbt_data = share->key_file[active_index]->dbt_neg_infty();
break;
}
}
else {
start_dbt_data = share->key_file[active_index]->dbt_neg_infty();
}
if (end_key) {
pack_key(&end_dbt_key, active_index, end_key_buff, end_key->key, end_key->length);
switch (end_key->flag) {
case HA_READ_BEFORE_KEY:
end_dbt_data = share->key_file[active_index]->dbt_neg_infty();
break;
default:
end_dbt_data = share->key_file[active_index]->dbt_pos_infty();
break;
}
}
else {
end_dbt_data = share->key_file[active_index]->dbt_pos_infty();
}
error = share->key_file[active_index]->pre_acquire_read_lock(
share->key_file[active_index],
transaction,
start_key ? &start_dbt_key : share->key_file[active_index]->dbt_neg_infty(),
start_dbt_data,
end_key ? &end_dbt_key : share->key_file[active_index]->dbt_pos_infty(),
end_dbt_data
);
if (error){ goto cleanup; }
error = handler::read_range_first(start_key, end_key, eq_range, sorted);
cleanup:
TOKUDB_DBUG_RETURN(error);
}
int ha_tokudb::read_range_next()
{