120 lines
3.9 KiB
C++
120 lines
3.9 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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#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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namespace sql {
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ObExprToDays::ObExprToDays(ObIAllocator& alloc)
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: ObFuncExprOperator(alloc, T_FUN_SYS_TO_DAYS, N_TO_DAYS, 1, NOT_ROW_DIMENSION){};
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ObExprToDays::~ObExprToDays()
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{}
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int ObExprToDays::calc_result_type1(ObExprResType& type, ObExprResType& date, common::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_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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const ObSQLSessionInfo* session = dynamic_cast<const ObSQLSessionInfo*>(type_ctx.get_session());
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if (OB_ISNULL(session)) {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("cast basic session to sql session info failed", K(ret));
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} else if (session->use_static_typing_engine()) {
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date.set_calc_type(ObDateType);
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}
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}
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return ret;
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}
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int ObExprToDays::calc_result1(ObObj& result, const ObObj& date, ObExprCtx& expr_ctx) const
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{
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int ret = OB_SUCCESS;
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EXPR_DEFINE_CAST_CTX(expr_ctx, CM_NONE);
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const ObObj* p_obj = NULL;
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EXPR_CAST_OBJ_V2(ObDateType, date, p_obj);
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if (OB_SUCC(ret)) {
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if (OB_ISNULL(p_obj)) {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("p_obj is null", K(ret));
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} else if (p_obj->is_null() || OB_INVALID_DATE_VALUE == cast_ctx.warning_) {
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result.set_null();
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} else {
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int64_t value = p_obj->get_date() + DAYS_FROM_ZERO_TO_BASE;
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if (value < 0) {
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result.set_null();
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} else {
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result.set_int(value);
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}
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}
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} else {
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LOG_WARN("cast obj failed", K(ret));
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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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// Unlike non-static engine which check whether return value is OB_INVLIAD_DATE_VALUE.
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// If convert failed, result is set to ZERO_DATE(default cast mode is ZERO_ON_WARN)
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// According to MySQL, when result is zero date, return value is 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, 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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// TODO: support enum/set type parameter
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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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