[FEAT MERGE] add direct load function

Co-authored-by: Monk-Liu <1152761042@qq.com>
Co-authored-by: saltonz <saltonzh@gmail.com>
Co-authored-by: yongshige <598633031@qq.com>

src/sql/engine/cmd/ob_table_direct_insert_ctx.h

@@ -0,0 +1,43 @@
+// Copyright (c) 2022-present Oceanbase Inc. All Rights Reserved.
+// Author:
+//   yuya.yu <yuya.yu@oceanbase.com>
+
+#pragma once
+
+#include "lib/container/ob_iarray.h"
+
+namespace oceanbase
+{
+namespace observer
+{
+class ObTableLoadExecCtx;
+class ObTableLoadInstance;
+}
+
+namespace sql
+{
+class ObExecContext;
+
+class ObTableDirectInsertCtx
+{
+public:
+  ObTableDirectInsertCtx()
+    : load_exec_ctx_(nullptr),
+      table_load_instance_(nullptr),
+      is_inited_(false) {}
+  ~ObTableDirectInsertCtx();
+  TO_STRING_KV(K_(is_inited));
+public:
+  int init(sql::ObExecContext *exec_ctx, const uint64_t table_id, const int64_t parallel);
+  int finish();
+  void destroy();
+private:
+  int init_store_column_idxs(const uint64_t tenant_id, const uint64_t table_id,
+                             common::ObIArray<int64_t> &store_column_idxs);
+private:
+  observer::ObTableLoadExecCtx *load_exec_ctx_;
+  observer::ObTableLoadInstance *table_load_instance_;
+  bool is_inited_;
+};
+} // namespace observer
+} // namespace oceanbase