/**
* @brief Getting the relation name
* @param relation_id relation id
* @return Tuple if valid relation_id, otherwise null
*/
char *Bridge::GetRelationName(Oid relation_id) {
LOG_WARN("Do not use bridge function(%s) in Peloton !!! ", __func__);
HeapTuple tuple;
Form_pg_class pg_class;
char *relation_name;
tuple = GetPGClassTupleForRelationOid(relation_id);
if (!HeapTupleIsValid(tuple)) {
return NULL;
}
// Get relation name
pg_class = (Form_pg_class)GETSTRUCT(tuple);
relation_name = NameStr(pg_class->relname);
return relation_name;
}
/**
* @brief Getting the number of tuples.
* @param relation_id relation id
* @return num_tuples if valid relation_id, otherwise -1
*/
float Bridge::GetNumberOfTuples(Oid relation_id) {
LOG_WARN("Do not use bridge function(%s) in Peloton !!! ", __func__);
HeapTuple tuple;
Form_pg_class pg_class;
float num_tuples;
tuple = GetPGClassTupleForRelationOid(relation_id);
if (!HeapTupleIsValid(tuple)) {
return -1;
}
pg_class = (Form_pg_class)GETSTRUCT(tuple);
// Get number of tuples
num_tuples = pg_class->reltuples;
return num_tuples;
}
/**
* @brief Getting the number of attributes.
* @param relation_id relation id
* @return num_atts if valid relation_id, otherwise -1
*/
int Bridge::GetNumberOfAttributes(Oid relation_id) {
LOG_TRACE("Do not use bridge function(%s) in Peloton !!! ", __func__);
HeapTuple tuple;
Form_pg_class pg_class;
int num_atts = -1;
tuple = GetPGClassTupleForRelationOid(relation_id);
if (!HeapTupleIsValid(tuple)) {
return num_atts;
}
pg_class = (Form_pg_class)GETSTRUCT(tuple);
// Get number of attributes
num_atts = pg_class->relnatts;
return num_atts;
}
