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session topological sorted table creation (progress)

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sascha
2025-07-15 07:09:40 +02:00
parent e7376ef269
commit dd737623f4
3 changed files with 30 additions and 27 deletions
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source/orm/orm/session.cpp
+24 -27
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@@ -19,23 +19,6 @@ session::session(sql::connection_pool<sql::connection> &pool)
}
utils::result<void, utils::error> session::create_schema() const {
std::vector<std::shared_ptr<object::schema_node> > relations_nodes;
auto c = pool_.acquire();
for (const auto &node: *schema_) {
// if (!node->info().has_primary_key()) {
// relations_nodes.push_back(node);
// continue;
// }
auto result = query::query::create()
.table(node->name(), node->info().definition().columns())
.execute(*c);
if (!result) {
return utils::failure(result.err());
}
}
return utils::ok<void>();
// Step 1: Build dependency graph
std::unordered_map<std::string, std::vector<std::string> > dependency_graph;
std::unordered_map<std::string, std::pair<int,object::schema::node_ptr>> in_degree;
@@ -44,14 +27,14 @@ utils::result<void, utils::error> session::create_schema() const {
for (auto it = node->info().endpoint_begin(); it != node->info().endpoint_end(); ++it) {
dependency_graph[node->name()].push_back(it->second->node().name());
in_degree[it->second->node().name()] = std::make_pair(0, it->second->node());
in_degree[it->second->node().name()]++;
in_degree[it->second->node().name()] = std::make_pair(0, it->second->node_ptr());
in_degree[it->second->node().name()].first++;
}
// Ensure the current node exists in the graph representation
if (in_degree.find(node->name()) == in_degree.end()) {
in_degree[node->name()] = 0;
in_degree[node->name()].first = 0;
}
}
@@ -60,8 +43,8 @@ utils::result<void, utils::error> session::create_schema() const {
std::vector<object::schema::node_ptr> sorted_order;
for (const auto &[table, degree]: in_degree) {
if (degree == 0) {
zero_in_degree.push(table);
if (degree.first == 0) {
zero_in_degree.push(degree.second);
}
}
@@ -70,11 +53,11 @@ utils::result<void, utils::error> session::create_schema() const {
zero_in_degree.pop();
sorted_order.push_back(current);
for (const auto &neighbor: dependency_graph[current]) {
in_degree[neighbor]--;
for (const auto &neighbor: dependency_graph[current->name()]) {
in_degree[neighbor].first--;
if (in_degree[neighbor] == 0) {
zero_in_degree.push(neighbor);
if (in_degree[neighbor].first == 0) {
zero_in_degree.push(in_degree[neighbor].second);
}
}
}
@@ -87,7 +70,8 @@ utils::result<void, utils::error> session::create_schema() const {
// Step 4: Create tables in the sorted order
for (const auto &table_name : sorted_order) {
for (const auto &node : sorted_order) {
std::cout << "Creating table " << node->name() << std::endl;
// schema_.
// auto result = query::query::create()
//
@@ -101,6 +85,19 @@ utils::result<void, utils::error> session::create_schema() const {
//
// }
}
auto c = pool_.acquire();
for (const auto &node: *schema_) {
auto result = query::query::create()
.table(node->name(), node->info().definition().columns())
.execute(*c);
if (!result) {
return utils::failure(result.err());
}
}
return utils::ok<void>();
}
utils::result<void, utils::error> session::drop_table(const std::string &table_name) const {