127 lines
3.8 KiB
C++
127 lines
3.8 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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#define USING_LOG_PREFIX SQL_ENG
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#include "sql/engine/ob_exec_context.h"
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#include "sql/engine/expr/ob_expr_errno.h"
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#include "lib/timezone/ob_time_convert.h"
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#include "sql/session/ob_sql_session_info.h"
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namespace oceanbase
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{
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using namespace common;
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namespace sql
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{
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ObExprErrno::ObExprErrno(ObIAllocator &alloc)
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: ObFuncExprOperator(alloc, T_FUN_SYS_ERRNO, N_SYS_ERRNO, ONE_OR_TWO, NOT_ROW_DIMENSION)
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{
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}
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ObExprErrno::~ObExprErrno()
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{
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}
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int ObExprErrno::calc_result_typeN(ObExprResType &type,
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ObExprResType *types_array,
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int64_t param_num,
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ObExprTypeCtx &type_ctx) const
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{
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int ret = OB_SUCCESS;
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type.set_int();
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type.set_precision(common::ObAccuracy::DDL_DEFAULT_ACCURACY[common::ObIntType].precision_);
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type.set_scale(common::DEFAULT_SCALE_FOR_INTEGER);
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CK(OB_NOT_NULL(type_ctx.get_session()));
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for (int64_t i = 0; OB_SUCC(ret) && i < param_num; ++i) {
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auto ¶m = types_array[i];
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param.set_calc_type(ObNumberType);
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}
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return ret;
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}
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int ObExprErrno::cg_expr(ObExprCGCtx &ctx, const ObRawExpr &raw_expr, ObExpr &rt_expr) const
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{
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int ret = OB_SUCCESS;
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UNUSED(ctx);
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UNUSED(raw_expr);
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CK(1 == rt_expr.arg_cnt_ || 2 == rt_expr.arg_cnt_);
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OX(rt_expr.eval_func_ = eval_errno);
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return ret;
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}
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int ObExprErrno::get_value(const number::ObNumber &nmb, int64_t &value)
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{
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int ret = OB_SUCCESS;
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value = 0;
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int64_t tmp = 0;
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if (!nmb.is_valid_int64(tmp)) { //based on the behaviour of mysql.
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ret = OB_INVALID_ARGUMENT;
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LOG_WARN("out of range", K(ret), K(nmb));
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} else {
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value = tmp;
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}
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return ret;
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}
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int ObExprErrno::conv2errno(int64_t value)
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{
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int ret = OB_SUCCESS;
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if (value < 0) {
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ret = static_cast<int>(value);
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}
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return ret;
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}
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// trigger and exception using `select errno(-4038) from dual`
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int ObExprErrno::eval_errno(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &res)
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{
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int ret = OB_SUCCESS;
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if (OB_FAIL(expr.eval_param_value(ctx))) {
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LOG_WARN("evaluate parameters failed", K(ret));
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} else {
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int64_t value = 0;
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res.set_null();
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if (1 == expr.arg_cnt_) {
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ObDatum *val = &expr.locate_param_datum(ctx, 0);
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if (val->is_null()) {
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} else if (OB_FAIL(get_value(number::ObNumber(val->get_number()), value))) {
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ret = OB_SUCCESS;
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} else {
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ret = conv2errno(value); // throw error if value < 0
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res.set_int(value); // abritary value is OK
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}
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} else if (2 == expr.arg_cnt_) {
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ObDatum *val = &expr.locate_param_datum(ctx, 0);
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ObDatum *timeout_val = &expr.locate_param_datum(ctx, 1);
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int64_t timeout = 0;
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if (val->is_null() || timeout_val->is_null()) {
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} else if (OB_FAIL(get_value(number::ObNumber(val->get_number()), value))) {
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ret = OB_SUCCESS;
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} else if (OB_FAIL(get_value(number::ObNumber(timeout_val->get_number()), timeout))) {
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ret = OB_SUCCESS;
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} else if (ctx.exec_ctx_.get_my_session()->get_query_start_time() + timeout > ObTimeUtility::current_time()) {
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ret = conv2errno(value); // throw error if value < 0
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res.set_int(value); // abritary value is OK
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} else {
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// time up! just eval the value and return the value, don't throw exception
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res.set_int(value);
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}
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}
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}
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return ret;
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}
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} //namespace sql
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} //namespace oceanbase
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