118 lines
3.8 KiB
C++
118 lines
3.8 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.
|
|
*/
|
|
|
|
#define USING_LOG_PREFIX SQL_ENG
|
|
|
|
#include "sql/engine/expr/ob_expr_timestamp_nvl.h"
|
|
#include "share/object/ob_obj_cast.h"
|
|
#include "sql/session/ob_sql_session_info.h"
|
|
using namespace oceanbase::common;
|
|
|
|
namespace oceanbase {
|
|
namespace sql {
|
|
|
|
ObExprTimestampNvl::ObExprTimestampNvl(ObIAllocator& alloc)
|
|
: ObStringExprOperator(alloc, T_FUN_SYS_TIMESTAMP_NVL, N_TIMESTAMP_NVL, 2)
|
|
{}
|
|
|
|
ObExprTimestampNvl::~ObExprTimestampNvl()
|
|
{}
|
|
|
|
int ObExprTimestampNvl::calc_result_type2(
|
|
ObExprResType& type, ObExprResType& type1, ObExprResType& type2, common::ObExprTypeCtx& type_ctx) const
|
|
{
|
|
int ret = OB_SUCCESS;
|
|
UNUSED(type_ctx);
|
|
UNUSED(type2);
|
|
if (is_oracle_mode()) {
|
|
type.set_type(ObTimestampNanoType);
|
|
} else {
|
|
type.set_type(ObTimestampType);
|
|
}
|
|
type.set_accuracy(type1.get_accuracy());
|
|
type.set_collation_level(type1.get_collation_level());
|
|
type.set_collation_type(type1.get_collation_type());
|
|
|
|
const ObSQLSessionInfo* session = static_cast<const ObSQLSessionInfo*>(type_ctx.get_session());
|
|
if (OB_ISNULL(session)) {
|
|
ret = OB_NOT_INIT;
|
|
LOG_WARN("session is null", K(ret));
|
|
} else if (session->use_static_typing_engine()) {
|
|
type1.set_calc_meta(type.get_obj_meta());
|
|
type2.set_calc_meta(type.get_obj_meta());
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
int ObExprTimestampNvl::calc_result2(ObObj& result, const ObObj& obj1, const ObObj& obj2, ObExprCtx& expr_ctx) const
|
|
{
|
|
int ret = OB_SUCCESS;
|
|
if (obj1.is_null()) {
|
|
result = obj2;
|
|
} else {
|
|
result = obj1;
|
|
}
|
|
|
|
if (false == result.is_null()) {
|
|
ObObjType res_type = get_result_type().get_type();
|
|
EXPR_DEFINE_CAST_CTX(expr_ctx, expr_ctx.cast_mode_);
|
|
if (OB_FAIL(ObObjCaster::to_type(res_type, cast_ctx, result, result))) {
|
|
LOG_WARN("convert result to timestamp failed", K(res_type), K(result), K(ret));
|
|
}
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
int ObExprTimestampNvl::cg_expr(ObExprCGCtx& op_cg_ctx, const ObRawExpr& raw_expr, ObExpr& rt_expr) const
|
|
{
|
|
UNUSED(op_cg_ctx);
|
|
UNUSED(raw_expr);
|
|
int ret = OB_SUCCESS;
|
|
if (rt_expr.arg_cnt_ != 2) {
|
|
ret = OB_INVALID_ARGUMENT;
|
|
LOG_WARN("timestampnvl expr should have two params", K(ret), K(rt_expr.arg_cnt_));
|
|
} else if (OB_ISNULL(rt_expr.args_) || OB_ISNULL(rt_expr.args_[0]) || OB_ISNULL(rt_expr.args_[1])) {
|
|
ret = OB_ERR_UNEXPECTED;
|
|
LOG_WARN("children of timestampnvl expr is null", K(ret), K(rt_expr.args_));
|
|
} else {
|
|
rt_expr.eval_func_ = ObExprTimestampNvl::calc_timestampnvl;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
int ObExprTimestampNvl::calc_timestampnvl(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& expr_datum)
|
|
{
|
|
int ret = OB_SUCCESS;
|
|
ObDatum* param_datum1 = NULL;
|
|
ObDatum* param_datum2 = NULL;
|
|
bool oracle_mode = is_oracle_mode();
|
|
if (OB_FAIL(expr.eval_param_value(ctx, param_datum1, param_datum2))) {
|
|
LOG_WARN("eval param value failed", K(ret));
|
|
} else if (param_datum1->is_null()) {
|
|
if (param_datum2->is_null()) {
|
|
expr_datum.set_null();
|
|
} else if (oracle_mode) {
|
|
expr_datum.set_otimestamp_tiny(param_datum2->get_otimestamp_tiny());
|
|
} else {
|
|
expr_datum.set_timestamp(param_datum2->get_timestamp());
|
|
}
|
|
} else if (oracle_mode) {
|
|
expr_datum.set_otimestamp_tiny(param_datum1->get_otimestamp_tiny());
|
|
} else {
|
|
expr_datum.set_timestamp(param_datum1->get_timestamp());
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
} // namespace sql
|
|
} // namespace oceanbase
|