333 lines
11 KiB
C++
333 lines
11 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_contains.
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*/
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#define USING_LOG_PREFIX SQL_ENG
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#include "ob_expr_json_contains.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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ObExprJsonContains::ObExprJsonContains(ObIAllocator &alloc)
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: ObFuncExprOperator(alloc, T_FUN_SYS_JSON_CONTAINS, N_JSON_CONTAINS, MORE_THAN_ONE, NOT_ROW_DIMENSION)
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{
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}
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ObExprJsonContains::~ObExprJsonContains()
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{
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}
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int ObExprJsonContains::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)) {
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ret = OB_ERR_PARAM_SIZE;
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ObString func_name_(N_JSON_CONTAINS);
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LOG_USER_ERROR(OB_ERR_PARAM_SIZE, func_name_.length(), func_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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for (int64_t i = 0; OB_SUCC(ret) && i < 2; i++) {
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if (OB_FAIL(ObJsonExprHelper::is_valid_for_json(types_stack, i, N_JSON_CONTAINS))) {
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LOG_WARN("wrong type for json doc.", K(ret), K(types_stack[i].get_type()));
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}
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}
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// set type for json_path
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if (OB_SUCC(ret) && param_num == 3) {
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if (OB_FAIL(ObJsonExprHelper::is_valid_for_path(types_stack, 2))) {
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LOG_WARN("wrong type for json path.", K(ret), K(types_stack[2].get_type()));
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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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int ObExprJsonContains::eval_json_contains(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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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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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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LOG_WARN("get_json_doc failed", K(ret));
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} else {}
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bool is_contains = false;
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if (!is_null_result && OB_SUCC(ret)) {
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if (expr.arg_cnt_ == 3) {
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ObJsonPathCache ctx_cache(&temp_allocator);
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ObJsonPathCache* path_cache = ObJsonExprHelper::get_path_cache_ctx(expr.expr_ctx_id_, &ctx.exec_ctx_);
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path_cache = ((path_cache != NULL) ? path_cache : &ctx_cache);
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ObDatum *path_data = NULL;
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if (OB_FAIL(expr.args_[2]->eval(ctx, path_data))) {
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LOG_WARN("eval json path datum failed", K(ret));
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} else if (expr.args_[2]->datum_meta_.type_ == ObNullType || path_data->is_null()) {
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is_null_result = true;
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} else {
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ObJsonBaseVector sub_json_targets;
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ObString path_val = path_data->get_string();
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ObJsonPath *json_path;
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if (OB_FAIL(ObJsonExprHelper::get_json_or_str_data(expr.args_[2], ctx, temp_allocator, path_val, is_null_result))) {
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LOG_WARN("fail to get real data.", K(ret), K(path_val));
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} else if (OB_FAIL(ObJsonExprHelper::find_and_add_cache(path_cache, json_path, path_val, 2, false))) {
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LOG_WARN("json path parse failed", K(path_data->get_string()), K(ret));
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} else if (OB_FAIL(json_target->seek(*json_path, json_path->path_node_cnt(), true, false, sub_json_targets))) {
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LOG_WARN("json seek failed", K(path_data->get_string()), K(ret));
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} else {
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// use the first of results as candidate
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if (sub_json_targets.size() > 0) {
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if (OB_FAIL(json_contains(sub_json_targets[0], json_candidate, &is_contains))) {
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LOG_WARN("json contain in sub_json_targets failed", K(ret));
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}
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} else {
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is_null_result = true;
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}
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}
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}
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} else {
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if (OB_FAIL(json_contains(json_target, json_candidate, &is_contains))) {
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LOG_WARN("json contain in sub_json_targets failed", K(ret));
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} else {
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}
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}
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}
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// set result
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if (OB_FAIL(ret)) {
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LOG_WARN("json_contains failed", K(ret));
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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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res.set_int(static_cast<int64_t>(is_contains));
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}
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return ret;
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}
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int ObExprJsonContains::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_contains;
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return OB_SUCCESS;
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}
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int ObExprJsonContains::json_contains_object(ObIJsonBase* json_target, ObIJsonBase* json_candidate, bool *result)
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{
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int ret = OB_SUCCESS;
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if (json_candidate->json_type() != ObJsonNodeType::J_OBJECT) {
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*result = false;
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} else if (json_target->element_count() == 0 && json_candidate->element_count() == 0) {
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*result = true;
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} else {
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JsonObjectIterator iter_t = json_target->object_iterator();
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JsonObjectIterator iter_c = json_candidate->object_iterator();
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while (!iter_t.end() && !iter_c.end() && OB_SUCC(ret)) {
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// find the same key
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ObString key1;
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if (OB_FAIL(iter_c.get_key(key1))) {
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LOG_WARN("fail to get key from iterator", K(ret));
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} else {
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while (!iter_t.end() && OB_SUCC(ret)) {
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ObString key2;
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if (OB_FAIL(iter_t.get_key(key2))) {
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LOG_WARN("fail to get key from iterator", K(ret));
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} else if (key1 == key2){
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break;
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} else {
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iter_t.next();
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}
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}
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if (iter_t.end()) {
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*result = false;
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break;
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}
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// compare value
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ObIJsonBase* j_t = NULL;
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ObIJsonBase* j_c = NULL;
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if (OB_FAIL(iter_t.get_value(j_t))) {
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LOG_WARN("fail to get value form iterator", K(ret));
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} else if (OB_FAIL(iter_c.get_value(j_c))) {
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LOG_WARN("fail to get value form iterator", K(ret));
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} else {
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if (OB_FAIL(json_contains(j_t, j_c, result))) {
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LOG_WARN("fail to compare j_t to j_c", K(ret));
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} else if (!*result) {
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break;
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}
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iter_c.next();
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}
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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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int ObExprJsonContains::json_contains_array(ObIJsonBase* json_target,
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ObIJsonBase* json_candidate,
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bool *result)
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{
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int ret = OB_SUCCESS;
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bool ret_tmp = true;
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ObIAllocator *allocator = json_target->get_allocator();
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ObJsonArray tmp_arr(allocator);
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if (json_candidate->json_type() != ObJsonNodeType::J_ARRAY) {
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// convert to array
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ObIJsonBase *jb_node = NULL;
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if (OB_FAIL(ObJsonBaseFactory::transform(allocator, json_candidate,
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ObJsonInType::JSON_TREE, jb_node))) {
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LOG_WARN("fail to transform to tree", K(ret), K(*json_candidate));
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} else {
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ObJsonNode *j_node = static_cast<ObJsonNode *>(jb_node);
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if (OB_FAIL(tmp_arr.array_append(j_node->clone(allocator)))) {
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LOG_WARN("result array append failed", K(ret), K(*j_node));
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} else {
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json_candidate = &tmp_arr;
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}
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}
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}
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// sort the array index
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ObSortedVector<ObIJsonBase *> t;
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ObSortedVector<ObIJsonBase *> c;
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if (OB_FAIL(ret) ||
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OB_FAIL(ObJsonBaseUtil::sort_array_pointer(json_target, t)) ||
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OB_FAIL(ObJsonBaseUtil::sort_array_pointer(json_candidate, c))) {
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LOG_WARN("sort_array_pointer failed.", K(ret));
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} else {
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uint64_t t_i = 0;
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for (uint64_t c_i = 0; c_i < c.size() && OB_SUCC(ret); c_i++) {
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ObJsonNodeType candt = c[c_i]->json_type();
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if (candt == ObJsonNodeType::J_ARRAY) {
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while (t_i < t.size()) {
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if (t[t_i]->json_type() < candt) {
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t_i++;
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} else {
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break;
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}
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}
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bool found = false;
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uint64_t tmp = t_i;
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while (tmp < t.size() && OB_SUCC(ret)) {
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if (t[tmp]->json_type() == ObJsonNodeType::J_ARRAY) {
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if (OB_FAIL(json_contains(t[tmp], c[c_i], &ret_tmp))) {
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LOG_WARN("json contain in sub_json_targets failed", K(ret));
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} else {
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if (ret_tmp) {
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found = true;
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break;
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}
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tmp++;
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}
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} else {
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break;
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}
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}
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if (!found) {
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ret_tmp = false;
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break;
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}
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} else {
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bool found = false;
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uint64_t tmp = t_i;
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while (tmp < t.size() && OB_SUCC(ret)) {
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if (t[tmp]->json_type() == ObJsonNodeType::J_ARRAY ||
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t[tmp]->json_type() == ObJsonNodeType::J_OBJECT) {
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if (OB_FAIL(json_contains(t[tmp], c[c_i], &ret_tmp))) {
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LOG_WARN("json contain in sub_json_targets failed", K(ret));
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} else {
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if (ret_tmp) {
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found = true;
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break;
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}
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}
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} else {
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int tmp_result = -1;
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if (OB_FAIL(t[tmp]->compare(*c[c_i], tmp_result))) {
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LOG_WARN("json compare in sub_json_targets failed", K(ret));
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} else {
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if (tmp_result == 0) {
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found = true;
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break;
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}
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}
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}
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tmp++;
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}
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ret_tmp = (t_i == t.size() || !found) ? false : true;
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}
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}
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}
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*result = (OB_SUCCESS == ret) ? ret_tmp : false;
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return ret;
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}
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int ObExprJsonContains::json_contains(ObIJsonBase* json_target, ObIJsonBase* json_candidate, bool *result)
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{
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int ret = OB_SUCCESS;
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switch (json_target->json_type()) {
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case ObJsonNodeType::J_ARRAY:
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if (OB_FAIL( json_contains_array(json_target, json_candidate, result))) {
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LOG_WARN("fail to json_contains with ARRAY type", K(ret));
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}
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break;
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case ObJsonNodeType::J_OBJECT:
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if (OB_FAIL( json_contains_object(json_target, json_candidate, result))) {
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LOG_WARN("fail to json_contains with OBJECT type", K(ret));
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}
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break;
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default:
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int res_int = -1;
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if (OB_FAIL( json_target->compare(*json_candidate, res_int))) {
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LOG_WARN("fail to json_contains with other type", K(ret));
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}
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*result = (res_int == 0);
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}
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return ret;
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}
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}
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} |