95 lines
3.2 KiB
C++
95 lines
3.2 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_EXE
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#include "ob_expr_to_days.h"
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#include "lib/timezone/ob_time_convert.h"
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#include "share/object/ob_obj_cast.h"
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#include "sql/session/ob_sql_session_info.h"
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#include "sql/engine/expr/ob_expr_util.h"
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using namespace oceanbase::common;
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using namespace oceanbase::sql;
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namespace oceanbase
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{
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namespace sql
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{
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ObExprToDays::ObExprToDays(ObIAllocator &alloc)
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: ObFuncExprOperator(alloc, T_FUN_SYS_TO_DAYS, N_TO_DAYS, 1, VALID_FOR_GENERATED_COL, NOT_ROW_DIMENSION) {};
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ObExprToDays::~ObExprToDays()
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{
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}
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int ObExprToDays::calc_result_type1(ObExprResType &type,
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ObExprResType &date,
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common::ObExprTypeCtx &type_ctx) const
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{
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int ret = OB_SUCCESS;
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UNUSED(type_ctx);
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type.set_int();
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type.set_scale(common::ObAccuracy::DDL_DEFAULT_ACCURACY[common::ObIntType].scale_);
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type.set_precision(common::ObAccuracy::DDL_DEFAULT_ACCURACY[common::ObIntType].precision_);
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if (ob_is_enumset_tc(date.get_type())) {
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date.set_calc_type(ObVarcharType);
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} else {
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date.set_calc_type(ObDateType);
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}
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return ret;
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}
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int calc_todays_expr(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &res_datum)
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{
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int ret = OB_SUCCESS;
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ObDatum *day_datum = NULL;
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// 这里没有像老框架一样，判断cast的返回值是否是OB_INVLIAD_DATE_VALUE
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// 如果转换失败，结果会被置为ZERO_DATE（cast mode默认是ZERO_ON_WARN）
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// MySQL的行为是，结果是zero date时，返回NULL
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if (OB_FAIL(expr.args_[0]->eval(ctx, day_datum))) {
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LOG_WARN("eval arg failed", K(ret));
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} else if (day_datum->is_null()) {
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res_datum.set_null();
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} else {
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int64_t day_int = day_datum->get_date() + DAYS_FROM_ZERO_TO_BASE;
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if (day_int < 0 || ObTimeConverter::ZERO_DATE == day_int) {
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res_datum.set_null();
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} else {
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res_datum.set_int(day_int);
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}
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}
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return ret;
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}
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int ObExprToDays::cg_expr(ObExprCGCtx &expr_cg_ctx, const ObRawExpr &raw_expr,
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ObExpr &rt_expr) const
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{
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int ret = OB_SUCCESS;
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UNUSED(expr_cg_ctx);
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if (OB_UNLIKELY(1 != raw_expr.get_param_count())) {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("raw_expr should got one child", K(ret), K(raw_expr));
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} else if (ObDateType != rt_expr.args_[0]->datum_meta_.type_) {
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// 类型推导部分有针对enum/set设置的calc type，但是新框架cast目前对enum/set支持不完整
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// 这里先报错，后续补上对enum/set的处理
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// enum/set->varchar->date
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("param type should be date", K(ret), K(rt_expr));
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} else {
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rt_expr.eval_func_ = calc_todays_expr;
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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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