128 lines
3.7 KiB
C++
128 lines
3.7 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/expr/ob_expr_xor.h"
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#include "lib/oblog/ob_log.h"
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#include "share/object/ob_obj_cast.h"
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#include "share/datum/ob_datum.h"
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#include "share/config/ob_server_config.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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using namespace share;
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namespace sql
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{
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ObExprXor::ObExprXor(ObIAllocator &alloc)
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: ObLogicalExprOperator(alloc, T_OP_XOR, N_XOR, PARAM_NUM_UNKNOWN, NOT_ROW_DIMENSION)
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{
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//not sure about the op name here
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}
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int ObExprXor::calc_result_typeN(ObExprResType &type,
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ObExprResType *types_stack,
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int64_t param_num,
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ObExprTypeCtx &type_ctx) const
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{
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UNUSED(types_stack);
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UNUSED(param_num);
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UNUSED(type_ctx);
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int ret = OB_SUCCESS;
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//just keep enumset as origin
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type.set_int32();
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type.set_precision(DEFAULT_PRECISION_FOR_BOOL);
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type.set_scale(DEFAULT_SCALE_FOR_INTEGER);
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//for expr and/or/xor, we depend on expr bool to get correct params,
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//no need to set calc type
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return ret;
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}
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int ObExprXor::cg_expr(ObExprCGCtx &op_cg_ctx,
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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(op_cg_ctx);
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UNUSED(raw_expr);
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if (OB_UNLIKELY(rt_expr.arg_cnt_ < 2 || rt_expr.type_ != T_OP_XOR)) {
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ret = OB_INVALID_ARGUMENT;
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LOG_WARN("invalid argument", K(ret));
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} else {
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rt_expr.eval_func_ = &eval_xor;
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}
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return ret;
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}
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int ObExprXor::eval_xor(const ObExpr &expr,
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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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if (OB_ISNULL(expr.args_)
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|| OB_UNLIKELY(expr.arg_cnt_ < 2)) {
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ret = OB_INVALID_ARGUMENT;
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LOG_WARN("invalid argument", K(ret));
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} else {
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// xor支持短路，如果有null，直接返回null
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ObDatum *param = NULL;
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bool found_null = false;
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bool cur_bool_v = false;
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if (OB_ISNULL(expr.args_[0])) {
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ret = OB_INVALID_ARGUMENT;
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LOG_WARN("invalid arg", K(ret), K(expr.args_[0]));
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} else if (OB_FAIL(expr.args_[0]->eval(ctx, param))) {
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LOG_WARN("failed to eval", K(ret));
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} else if (OB_ISNULL(param)) {
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ret = OB_INVALID_ARGUMENT;
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LOG_WARN("invalid param", K(ret), K(param));
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} else if (param->is_null()) {
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expr_datum.set_null();
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found_null = true;
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} else {
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cur_bool_v = (param->get_int() != 0);
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}
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for (int i = 1; OB_SUCC(ret) && !found_null && i < expr.arg_cnt_; i++) {
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if (OB_ISNULL(expr.args_[i])) {
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ret = OB_INVALID_ARGUMENT;
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LOG_WARN("invalid argument", K(ret), K(i));
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} else if (OB_FAIL(expr.args_[i]->eval(ctx, param))) {
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LOG_WARN("failed to eval param", K(ret));
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} else if (OB_ISNULL(param)) {
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ret = OB_INVALID_ARGUMENT;
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LOG_WARN("invalid param", K(ret), K(param));
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} else if (param->is_null()) {
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expr_datum.set_null();
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found_null = true;
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} else {
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cur_bool_v = cur_bool_v ^ ((param->get_int() != 0));
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}
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}
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if (OB_SUCC(ret) && !found_null) {
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expr_datum.set_int(cur_bool_v);
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}
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}
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return ret;
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}
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// int ObExprXor::eval_xor()
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}
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}
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