add alter table catalog

Author: DeanChensj

src/catalog/catalog.cpp

@@ -32,6 +32,8 @@
 #include "function/old_engine_string_functions.h"
 #include "function/timestamp_functions.h"
 #include "index/index_factory.h"
+#include "planner/seq_scan_plan.h"
+#include "planner/insert_plan.h"
 #include "settings/settings_manager.h"
 #include "storage/storage_manager.h"
 #include "storage/table_factory.h"

src/include/catalog/catalog.h

@@ -15,6 +15,7 @@
 #include <mutex>
 
 #include "catalog/catalog_defaults.h"
+#include "catalog/column_catalog.h"
 #include "function/functions.h"
 
 namespace peloton {

src/include/storage/database.h

@@ -72,6 +72,9 @@ class Database : public Printable {
   std::string GetDBName();
   void setDBName(const std::string &database_name);
 
+  storage::DataTable *ReplaceTableWithOid(const oid_t table_oid,
+                                          storage::DataTable *new_table);
+
  protected:
   //===--------------------------------------------------------------------===//
   // MEMBERS

src/storage/database.cpp

@@ -184,5 +184,25 @@ void Database::setDBName(const std::string &database_name) {
   Database::database_name = database_name;
 }
 
+storage::DataTable *Database::ReplaceTableWithOid(
+    const oid_t table_oid, storage::DataTable *new_table) {
+  {
+    std::lock_guard<std::mutex> lock(database_mutex);
+
+    oid_t table_offset = 0;
+    for (auto table : tables) {
+      if (table->GetOid() == table_oid) {
+        break;
+      }
+      table_offset++;
+    }
+    PL_ASSERT(table_offset < tables.size());
+
+    auto old_table = tables.at(table_offset);
+    tables[table_offset] = new_table;
+    return old_table;
+  }
+}
+
 }  // namespace storage
 }  // namespace peloton