void CatalogDatabaseCache::update(const serialization::CatalogDatabase &proto) {
DCHECK(ProtoIsValid(proto))
<< "Attempted to create CatalogDatabaseCache from an invalid proto description:\n"
<< proto.DebugString();
vector<int> new_relation_schema_proto_indices;
{
SpinSharedMutexSharedLock<false> read_lock(relations_mutex_);
for (int i = 0; i < proto.relations_size(); ++i) {
const auto it = rel_map_.find(proto.relations(i).relation_id());
if (it == rel_map_.end()) {
new_relation_schema_proto_indices.push_back(i);
} else {
// TODO(quickstep-team): Support schema changes by adding the index of
// changed schema proto in 'changed_relation_schema_proto_indices'.
}
}
}
SpinSharedMutexExclusiveLock<false> write_lock(relations_mutex_);
for (const int i : new_relation_schema_proto_indices) {
const serialization::CatalogRelationSchema &proto_relation = proto.relations(i);
auto relation_schema = make_unique<const CatalogRelationSchema>(proto_relation);
rel_map_.emplace(proto_relation.relation_id(), move(relation_schema));
}
// TODO(quickstep-team): Reset the schema for the changes in the following
// steps for each index in 'changed_relation_schema_proto_indices':
// 1. Drop the blocks belonged to 'proto.relations(i).relation_id()' in the
// buffer pool.
// 2. Reset the changed schema, while the scheduler ensures no queries will
// load back the related blocks.
// 3. Signal the scheduler to accept new queries for the changed schema.
}
CatalogDatabaseCache::CatalogDatabaseCache(const serialization::CatalogDatabase &proto) {
DCHECK(ProtoIsValid(proto))
<< "Attempted to create CatalogDatabaseCache from an invalid proto description:\n"
<< proto.DebugString();
for (int i = 0; i < proto.relations_size(); ++i) {
auto relation_schema = make_unique<const CatalogRelationSchema>(proto.relations(i));
rel_map_.emplace(relation_schema->getID(), move(relation_schema));
}
}
CatalogDatabase::CatalogDatabase(const serialization::CatalogDatabase &proto) : name_(proto.name()) {
DCHECK(ProtoIsValid(proto))
<< "Attempted to create CatalogDatabase from an invalid proto description:\n"
<< proto.DebugString();
for (int index_relations = 0, index_null_relations = 0;
index_relations < proto.null_relations_size() + proto.relations_size();
++index_relations) {
if (index_null_relations < proto.null_relations_size() &&
index_relations == proto.null_relations(index_null_relations)) {
rel_vec_.push_back(NULL);
++index_null_relations;
} else {
addRelation(new CatalogRelation(proto.relations(index_relations - index_null_relations)));
}
}
}