Constraint refactoring (#1415)

* Add pg_constraint catalog table

* Reconstruct constraints

Author: ksaito7

src/catalog/abstract_catalog.cpp

@@ -29,6 +29,7 @@
 #include "planner/seq_scan_plan.h"
 
 #include "executor/executor_context.h"
+#include "executor/create_executor.h"
 #include "executor/delete_executor.h"
 #include "executor/index_scan_executor.h"
 #include "executor/insert_executor.h"
@@ -60,30 +61,24 @@ AbstractCatalog::AbstractCatalog(storage::Database *pg_catalog,
 
 AbstractCatalog::AbstractCatalog(concurrency::TransactionContext *txn,
                                  const std::string &catalog_table_ddl) {
-  // get catalog table schema
+  // Execute create catalog table
   auto &peloton_parser = parser::PostgresParser::GetInstance();
+  std::unique_ptr<executor::ExecutorContext> context(
+      new executor::ExecutorContext(txn));
   auto create_plan = std::dynamic_pointer_cast<planner::CreatePlan>(
       optimizer::Optimizer().BuildPelotonPlanTree(
           peloton_parser.BuildParseTree(catalog_table_ddl), txn));
-  auto catalog_table_schema = create_plan->GetSchema();
-  auto catalog_table_name = create_plan->GetTableName();
-  auto catalog_schema_name = create_plan->GetSchemaName();
-  auto catalog_database_name = create_plan->GetDatabaseName();
-  PELOTON_ASSERT(catalog_schema_name == std::string(CATALOG_SCHEMA_NAME));
-  // create catalog table
-  Catalog::GetInstance()->CreateTable(txn,
-                                      catalog_database_name,
-                                      catalog_schema_name,
-                                      std::unique_ptr<catalog::Schema>(
-                                          catalog_table_schema),
-                                      catalog_table_name,
-                                      true);
+  executor::CreateExecutor executor(create_plan.get(), context.get());
+
+  executor.Init();
+  executor.Execute();
 
   // get catalog table oid
-  auto catalog_table_object = Catalog::GetInstance()->GetTableCatalogEntry(txn,
-                                                                           catalog_database_name,
-                                                                           catalog_schema_name,
-                                                                           catalog_table_name);
+  auto catalog_table_object =
+      Catalog::GetInstance()->GetTableCatalogEntry(txn,
+                                                   create_plan->GetDatabaseName(),
+                                                   create_plan->GetSchemaName(),
+                                                   create_plan->GetTableName());
 
   // set catalog_table_
   try {

src/catalog/catalog.cpp

@@ -45,7 +45,9 @@ void Column::SetInlined() {
 const std::string Column::GetInfo() const {
   std::ostringstream os;
 
-  os << "Column[" << column_name << ", " << TypeIdToString(column_type_) << ", "
+  os << "Column[" << column_name_ << ", "
+     << TypeIdToString(column_type_) << ", "
+
      << "Offset:" << column_offset_ << ", ";
 
   if (is_inlined_) {
@@ -54,19 +56,17 @@ const std::string Column::GetInfo() const {
     os << "VarLength:" << variable_length_;
   }
 
-  if (constraints_.empty() == false) {
-    os << ", {";
-    bool first = true;
-    for (auto constraint : constraints_) {
-      if (first) {
-        first = false;
-      } else {
-        os << ", ";
-      }
-      os << constraint.GetInfo();
-    }
-    os << "}";
+  if (is_not_null_ && has_default_) {
+    os << ", {NOT NULL, DEFAULT:"
+       << default_value_->ToString() << "}";
+  } else if (is_not_null_) {
+    os << ", {NOT NULL}";
+  } else if (has_default_) {
+    os << ", {DEFAULT:"
+       << default_value_->ToString() << "}";
+
   }
+
   os << "]";
 
   return (os.str());