67 lines
1.9 KiB
C++
67 lines
1.9 KiB
C++
/**
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* Copyright (c) 2021 OceanBase
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* OceanBase CE is licensed under Mulan PubL v2.
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* You can use this software according to the terms and conditions of the Mulan PubL v2.
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* You may obtain a copy of Mulan PubL v2 at:
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* http://license.coscl.org.cn/MulanPubL-2.0
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* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
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* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
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* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
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* See the Mulan PubL v2 for more details.
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*/
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#include "sql/engine/expr/ob_expr_row_count.h"
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#include "sql/session/ob_sql_session_info.h"
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#include "sql/engine/ob_exec_context.h"
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using namespace oceanbase::common;
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namespace oceanbase
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{
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namespace sql
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{
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ObExprRowCount::ObExprRowCount(ObIAllocator &alloc)
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: ObFuncExprOperator(alloc, T_FUN_SYS_ROW_COUNT, N_ROW_COUNT, 0, NOT_VALID_FOR_GENERATED_COL, NOT_ROW_DIMENSION)
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{
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}
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ObExprRowCount::~ObExprRowCount()
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{
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}
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int ObExprRowCount::calc_result_type0(ObExprResType &type, common::ObExprTypeCtx &type_ctx) const
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{
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UNUSED(type_ctx);
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type.set_int();
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type.set_scale(ObAccuracy::DDL_DEFAULT_ACCURACY[ObIntType].scale_);
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type.set_precision(ObAccuracy::DDL_DEFAULT_ACCURACY[ObIntType].precision_);
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return OB_SUCCESS;
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}
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int ObExprRowCount::eval_row_count(const ObExpr &expr, ObEvalCtx &ctx,
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ObDatum &expr_datum)
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{
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int ret = OB_SUCCESS;
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UNUSED(expr);
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const ObSQLSessionInfo *session_info = NULL;
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if (OB_ISNULL(session_info = ctx.exec_ctx_.get_my_session())) {
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ret = OB_ERR_UNEXPECTED;
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SQL_ENG_LOG(WARN, "session info is null", K(ret));
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} else {
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expr_datum.set_int(session_info->get_affected_rows());
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}
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return ret;
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}
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int ObExprRowCount::cg_expr(ObExprCGCtx &op_cg_ctx, const ObRawExpr &raw_expr,
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ObExpr &rt_expr) const
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{
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UNUSED(raw_expr);
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UNUSED(op_cg_ctx);
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rt_expr.eval_func_ = ObExprRowCount::eval_row_count;
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return OB_SUCCESS;
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}
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}
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}
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