196 lines
6.9 KiB
C++
196 lines
6.9 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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* This file contains implementation for JSON_EQUAL.
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*/
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#define USING_LOG_PREFIX SQL_ENG
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#include "ob_expr_json_equal.h"
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#include "sql/engine/expr/ob_expr_json_func_helper.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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ObExprJsonEqual::ObExprJsonEqual(ObIAllocator &alloc)
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: ObFuncExprOperator(alloc, T_FUN_SYS_JSON_EQUAL, N_JSON_EQUAL, TWO_OR_THREE, VALID_FOR_GENERATED_COL, NOT_ROW_DIMENSION)
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{
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}
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ObExprJsonEqual::~ObExprJsonEqual()
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{
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}
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int ObExprJsonEqual::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(type_ctx);
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int ret = OB_SUCCESS;
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if (OB_UNLIKELY(param_num > 3) || OB_UNLIKELY(param_num < 2)) {
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ret = OB_ERR_PARAM_SIZE;
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ObString name(N_JSON_EQUAL);
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LOG_USER_ERROR(OB_ERR_PARAM_SIZE, name.length(), name.ptr());
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} else {
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// set the result type to bool
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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(ObAccuracy::DDL_DEFAULT_ACCURACY[ObIntType].scale_);
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// set type for json_doc and json_candidate
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if (OB_FAIL(ObJsonExprHelper::is_valid_for_json(types_stack, 0, N_JSON_EQUAL))) {
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LOG_WARN("wrong type for json doc.", K(ret), K(types_stack[0]));
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} else if (OB_FAIL(ObJsonExprHelper::is_valid_for_json(types_stack, 1, N_JSON_EQUAL))) {
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LOG_WARN("wrong type for json doc.", K(ret), K(types_stack[1]));
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}
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if (OB_SUCC(ret) && param_num == 3) {
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if (types_stack[2].get_type() != ObIntType && types_stack[2].get_type() != ObNumberType) {
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ret = OB_ERR_INVALID_TYPE_FOR_JSON;
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LOG_USER_ERROR(OB_ERR_INVALID_TYPE_FOR_JSON, 3, N_JSON_EQUAL);
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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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bool ObExprJsonEqual::is_json_scalar(ObIJsonBase *ptr)
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{
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bool ret_bool = false;
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if (!OB_ISNULL(ptr)) {
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ObJsonNodeType json_type = ptr->json_type();
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if (json_type < ObJsonNodeType::J_MAX_TYPE
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&& (json_type != ObJsonNodeType::J_OBJECT && json_type != ObJsonNodeType::J_ARRAY)) {
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ret_bool = true;
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}
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}
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return ret_bool;
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}
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int ObExprJsonEqual::eval_json_equal(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &res)
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{
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INIT_SUCC(ret);
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ObIJsonBase *json_target = NULL;
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ObIJsonBase *json_candidate = NULL;
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bool is_null_result = false;
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ObEvalCtx::TempAllocGuard tmp_alloc_g(ctx);
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common::ObArenaAllocator &temp_allocator = tmp_alloc_g.get_allocator();
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int compare_res = -1;
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bool is_equal = false;
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uint8_t option_on_error = 0;
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// json数据解析出错或非标量，此时根据on error参数返回结果
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bool is_cover_by_error = false;
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bool both_json = false;
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// 检查是否均为 json 类型，如果均为json类型，标量相比不报错
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// 只要有一个参数不是json类型，标量相比就会报错
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if (expr.args_[0]->datum_meta_.type_ == ObJsonType
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|| expr.args_[1]->datum_meta_.type_ == ObJsonType) {
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both_json = true;
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}
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ObExpr *json_arg_l = expr.args_[0];
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ObObjType val_type_l = json_arg_l->datum_meta_.type_;
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ObExpr *json_arg_r = expr.args_[1];
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ObObjType val_type_r = json_arg_l->datum_meta_.type_;
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if (val_type_l == ObRawType || val_type_r == ObRawType) {
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ret = OB_ERR_JSON_SYNTAX_ERROR;
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is_cover_by_error = true;
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} else if (OB_FAIL(ObJsonExprHelper::get_json_doc(expr, ctx, temp_allocator, 0,
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json_target, is_null_result))) {
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if (ret == OB_ERR_JSON_SYNTAX_ERROR) is_cover_by_error = true;
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LOG_WARN("get_json_doc failed", K(ret));
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} else if (!is_null_result && OB_FAIL(ObJsonExprHelper::get_json_doc(expr, ctx, temp_allocator, 1,
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json_candidate, is_null_result))) {
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if (ret == OB_ERR_JSON_SYNTAX_ERROR) is_cover_by_error = true;
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LOG_WARN("get_json_doc failed", K(ret));
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} else if(!is_null_result && !both_json && (is_json_scalar(json_target)
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|| is_json_scalar(json_candidate))) {
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ret = OB_ERR_JSON_SYNTAX_ERROR;
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is_cover_by_error = true;
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LOG_USER_ERROR(OB_ERR_JSON_SYNTAX_ERROR);
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} else if (!is_null_result && OB_FAIL(json_target->compare(*json_candidate, compare_res))){
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LOG_WARN("fail to compare between json doc", K(ret));
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}
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// 记录当前ret，防止取on error参数时覆盖之前的错误码
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INIT_SUCC(tmp_ret);
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if (!is_null_result && expr.arg_cnt_ == 3) {
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ObExpr *json_arg = expr.args_[2];
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ObObjType val_type = json_arg->datum_meta_.type_;
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ObDatum *json_datum = NULL;
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tmp_ret = ret;
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ret = OB_SUCCESS;
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val_type = json_arg->datum_meta_.type_;
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if (OB_FAIL(json_arg->eval(ctx, json_datum))) {
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LOG_WARN("eval json arg failed", K(ret));
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} else if (val_type == ObIntType) {
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int64_t option = json_datum->get_int();
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if (option < OB_JSON_FALSE_ON_ERROR ||
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option > OB_JSON_ERROR_ON_ERROR) {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("input option type error", K(option), K(ret));
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} else {
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option_on_error = static_cast<uint8_t>(option);
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}
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} else if (val_type == ObNumberType) {
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const uint32_t *option = json_datum->get_number_digits();
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if (*option < OB_JSON_FALSE_ON_ERROR ||
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*option > OB_JSON_ERROR_ON_ERROR) {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("input option type error", K(option), K(ret));
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} else {
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option_on_error = static_cast<uint8_t>(*option);
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}
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}
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} else if (expr.arg_cnt_ == 2) {
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tmp_ret = ret;
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}
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// set result
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if (OB_FAIL(ret) && !is_cover_by_error) {
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// 解析on error 参数出错，正常返回错误码
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} else if (OB_FAIL(tmp_ret) && is_cover_by_error) {
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// json数据出错
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if (option_on_error == OB_JSON_FALSE_ON_ERROR) {
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res.set_int(0);
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ret = OB_SUCCESS;
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} else if (option_on_error == OB_JSON_TRUE_ON_ERROR) {
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res.set_int(1);
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ret = OB_SUCCESS;
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} else if (tmp_ret == OB_ERR_INVALID_JSON_TEXT_IN_PARAM) {
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ret = OB_ERR_JSON_SYNTAX_ERROR;
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}
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} else if (is_null_result) {
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res.set_null();
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} else {
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is_equal = (compare_res == 0);
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res.set_int(static_cast<int64_t>(is_equal));
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}
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return ret;
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}
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int ObExprJsonEqual::cg_expr(ObExprCGCtx &expr_cg_ctx, const ObRawExpr &raw_expr, ObExpr &rt_expr) const
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{
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UNUSED(expr_cg_ctx);
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UNUSED(raw_expr);
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rt_expr.eval_func_ = eval_json_equal;
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return OB_SUCCESS;
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}
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}
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} |