68 lines
1.9 KiB
C++
68 lines
1.9 KiB
C++
/**
|
|
* Copyright (c) 2021 OceanBase
|
|
* OceanBase CE 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.
|
|
*/
|
|
|
|
#include "sql/engine/expr/ob_expr_found_rows.h"
|
|
#include "sql/session/ob_sql_session_info.h"
|
|
#include "sql/engine/ob_exec_context.h"
|
|
|
|
using namespace oceanbase::common;
|
|
|
|
namespace oceanbase
|
|
{
|
|
namespace sql
|
|
{
|
|
|
|
ObExprFoundRows::ObExprFoundRows(ObIAllocator &alloc)
|
|
: ObFuncExprOperator(alloc, T_FUN_SYS_FOUND_ROWS, N_FOUND_ROWS, 0, NOT_ROW_DIMENSION)
|
|
{
|
|
}
|
|
|
|
ObExprFoundRows::~ObExprFoundRows()
|
|
{
|
|
}
|
|
|
|
int ObExprFoundRows::calc_result_type0(ObExprResType &type,
|
|
common::ObExprTypeCtx &type_ctx) const
|
|
{
|
|
UNUSED(type_ctx);
|
|
type.set_int();
|
|
type.set_precision(ObAccuracy::DDL_DEFAULT_ACCURACY[ObIntType].precision_);
|
|
type.set_scale(DEFAULT_SCALE_FOR_INTEGER);
|
|
return OB_SUCCESS;
|
|
}
|
|
|
|
int ObExprFoundRows::eval_found_rows(const ObExpr &expr, ObEvalCtx &ctx,
|
|
ObDatum &expr_datum)
|
|
{
|
|
int ret = OB_SUCCESS;
|
|
UNUSED(expr);
|
|
const ObSQLSessionInfo *session_info = NULL;
|
|
if (OB_ISNULL(session_info = ctx.exec_ctx_.get_my_session())) {
|
|
ret = OB_ERR_UNEXPECTED;
|
|
SQL_ENG_LOG(WARN, "session info is null", K(ret));
|
|
} else {
|
|
expr_datum.set_int(session_info->get_found_rows());
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
int ObExprFoundRows::cg_expr(ObExprCGCtx &op_cg_ctx, const ObRawExpr &raw_expr,
|
|
ObExpr &rt_expr) const
|
|
{
|
|
UNUSED(raw_expr);
|
|
UNUSED(op_cg_ctx);
|
|
rt_expr.eval_func_ = ObExprFoundRows::eval_found_rows;
|
|
return OB_SUCCESS;
|
|
}
|
|
}
|
|
}
|