/**
 * Copyright (c) 2023 OceanBase
 * OceanBase is licensed under Mulan PubL v2.
 * You can use this software according to the terms and conditions of the Mulan PubL v2.
 * You may obtain a copy of Mulan PubL v2 at:
 *          http://license.coscl.org.cn/MulanPubL-2.0
 * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
 * EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
 * MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
 * See the Mulan PubL v2 for more details.
 */

#define USING_LOG_PREFIX COMMON

#include "sql/engine/expr/ob_expr_vec_data.h"

namespace oceanbase
{
using namespace common;
namespace sql
{
ObExprVecData::ObExprVecData(ObIAllocator &allocator)
  : ObFuncExprOperator(allocator, T_FUN_SYS_VEC_DATA, N_VEC_DATA, MORE_THAN_ZERO, VALID_FOR_GENERATED_COL, NOT_ROW_DIMENSION)
{
  need_charset_convert_ = false;
}

int ObExprVecData::calc_result_typeN(ObExprResType &type,
                                       ObExprResType *types,
                                       int64_t param_num,
                                       ObExprTypeCtx &type_ctx) const
{
  int ret = OB_SUCCESS;
  if (OB_UNLIKELY(param_num < 1) || OB_ISNULL(types)) {
    ret = OB_INVALID_ARGUMENT;
    LOG_WARN("invalid argument for fulltext expr", K(ret), K(param_num), KP(types));
  } else {
    type.set_blob();
    type.set_length(OB_MAX_LONGTEXT_LENGTH);
  }
  return ret;}

int ObExprVecData::calc_resultN(ObObj &result,
                                  const ObObj *objs_array,
                                  int64_t param_num,
                                  ObExprCtx &expr_ctx) const
{
  return OB_NOT_SUPPORTED;
}

int ObExprVecData::cg_expr(
    ObExprCGCtx &expr_cg_ctx,
    const ObRawExpr &raw_expr,
    ObExpr &rt_expr) const
{
  int ret = OB_SUCCESS;
  UNUSED(raw_expr);
  UNUSED(expr_cg_ctx);
  if (OB_UNLIKELY(rt_expr.arg_cnt_ < 1) || OB_ISNULL(rt_expr.args_)) {
    ret = OB_INVALID_ARGUMENT;
    LOG_WARN("invalid arguments", K(rt_expr.arg_cnt_), KP(rt_expr.args_), K(rt_expr.type_));
  } else {
    rt_expr.eval_func_ = generate_vec_data;
  }
  return ret;
}

/*static*/ int ObExprVecData::generate_vec_data(
    const ObExpr &raw_ctx,
    ObEvalCtx &eval_ctx,
    ObDatum &expr_datum)
{
  int ret = OB_SUCCESS;
  UNUSEDx(raw_ctx, eval_ctx);
  expr_datum.set_null();
  return ret;
}

}  // namespace sql
}  // namespace oceanbase