401 lines
14 KiB
C++
401 lines
14 KiB
C++
// Licensed to the Apache Software Foundation (ASF) under one
|
|
// or more contributor license agreements. See the NOTICE file
|
|
// distributed with this work for additional information
|
|
// regarding copyright ownership. The ASF licenses this file
|
|
// to you under the Apache License, Version 2.0 (the
|
|
// "License"); you may not use this file except in compliance
|
|
// with the License. You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing,
|
|
// software distributed under the License is distributed on an
|
|
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
|
|
// KIND, either express or implied. See the License for the
|
|
// specific language governing permissions and limitations
|
|
// under the License.
|
|
|
|
#include "exprs/json_functions.h"
|
|
|
|
#include <stdlib.h>
|
|
#include <sys/time.h>
|
|
|
|
#include <sstream>
|
|
#include <string>
|
|
#include <vector>
|
|
|
|
#include <boost/algorithm/string.hpp>
|
|
#include <boost/tokenizer.hpp>
|
|
#include <rapidjson/stringbuffer.h>
|
|
#include <rapidjson/document.h>
|
|
#include <rapidjson/writer.h>
|
|
#include <re2/re2.h>
|
|
|
|
#include "exprs/expr.h"
|
|
#include "exprs/anyval_util.h"
|
|
#include "common/logging.h"
|
|
#include "olap/olap_define.h"
|
|
#include "runtime/string_value.h"
|
|
#include "runtime/tuple_row.h"
|
|
#include "rapidjson/error/en.h"
|
|
|
|
namespace doris {
|
|
|
|
// static const re2::RE2 JSON_PATTERN("^([a-zA-Z0-9_\\-\\:\\s#\\|\\.]*)(?:\\[([0-9]+)\\])?");
|
|
// json path cannot contains: ", [, ]
|
|
static const re2::RE2 JSON_PATTERN("^([^\\\"\\[\\]]*)(?:\\[([0-9]+|\\*)\\])?");
|
|
|
|
void JsonFunctions::init() {
|
|
}
|
|
|
|
IntVal JsonFunctions::get_json_int(
|
|
FunctionContext* context, const StringVal& json_str, const StringVal& path) {
|
|
if (json_str.is_null || path.is_null) {
|
|
return IntVal::null();
|
|
}
|
|
std::string json_string((char*)json_str.ptr, json_str.len);
|
|
std::string path_string((char*)path.ptr, path.len);
|
|
rapidjson::Document document;
|
|
rapidjson::Value* root =
|
|
get_json_object(context, json_string, path_string, JSON_FUN_INT, &document);
|
|
if (root != nullptr && root->IsInt()) {
|
|
return IntVal(root->GetInt());
|
|
} else {
|
|
return IntVal::null();
|
|
}
|
|
}
|
|
|
|
StringVal JsonFunctions::get_json_string(
|
|
FunctionContext* context, const StringVal& json_str, const StringVal& path) {
|
|
if (json_str.is_null || path.is_null) {
|
|
return StringVal::null();
|
|
}
|
|
|
|
std::string json_string((char*)json_str.ptr, json_str.len);
|
|
std::string path_string((char*)path.ptr, path.len);
|
|
rapidjson::Document document;
|
|
rapidjson::Value* root =
|
|
get_json_object(context, json_string, path_string, JSON_FUN_STRING, &document);
|
|
if (root == nullptr || root->IsNull()) {
|
|
return StringVal::null();
|
|
} else if (root->IsString()) {
|
|
return AnyValUtil::from_string_temp(context, root->GetString());
|
|
} else {
|
|
rapidjson::StringBuffer buf;
|
|
rapidjson::Writer<rapidjson::StringBuffer> writer(buf);
|
|
root->Accept(writer);
|
|
return AnyValUtil::from_string_temp(context, std::string(buf.GetString()));
|
|
}
|
|
}
|
|
|
|
DoubleVal JsonFunctions::get_json_double(
|
|
FunctionContext* context, const StringVal& json_str, const StringVal& path) {
|
|
if (json_str.is_null || path.is_null) {
|
|
return DoubleVal::null();
|
|
}
|
|
std::string json_string((char*)json_str.ptr, json_str.len);
|
|
std::string path_string((char*)path.ptr, path.len);
|
|
rapidjson::Document document;
|
|
rapidjson::Value* root =
|
|
get_json_object(context, json_string, path_string, JSON_FUN_DOUBLE, &document);
|
|
if (root == nullptr || root->IsNull()) {
|
|
return DoubleVal::null();
|
|
} else if (root->IsInt()) {
|
|
return DoubleVal(static_cast<double>(root->GetInt()));
|
|
} else if (root->IsDouble()) {
|
|
return DoubleVal(root->GetDouble());
|
|
} else {
|
|
return DoubleVal::null();
|
|
}
|
|
}
|
|
|
|
|
|
rapidjson::Value* JsonFunctions::match_value(
|
|
const std::vector<JsonPath>& parsed_paths,
|
|
rapidjson::Value* document,
|
|
rapidjson::Document::AllocatorType& mem_allocator,
|
|
bool is_insert_null) {
|
|
rapidjson::Value* root = document;
|
|
rapidjson::Value* array_obj = nullptr;
|
|
for (int i = 1; i < parsed_paths.size(); i++) {
|
|
VLOG(10) << "parsed_paths: " << parsed_paths[i].debug_string();
|
|
|
|
if (root == nullptr || root->IsNull()) {
|
|
return nullptr;
|
|
}
|
|
|
|
if (UNLIKELY(!parsed_paths[i].is_valid)) {
|
|
return nullptr;
|
|
}
|
|
|
|
const std::string& col = parsed_paths[i].key;
|
|
int index = parsed_paths[i].idx;
|
|
if (LIKELY(!col.empty())) {
|
|
if (root->IsArray()) {
|
|
array_obj = static_cast<rapidjson::Value*>(
|
|
mem_allocator.Malloc(sizeof(rapidjson::Value)));
|
|
array_obj->SetArray();
|
|
bool is_null = true;
|
|
|
|
// if array ,loop the array,find out all Objects,then find the results from the objects
|
|
for (int j = 0; j < root->Size(); j++) {
|
|
rapidjson::Value* json_elem = &((*root)[j]);
|
|
|
|
if (json_elem->IsArray() || json_elem->IsNull()) {
|
|
continue;
|
|
} else {
|
|
if (!json_elem->IsObject()) {
|
|
continue;
|
|
}
|
|
if (!json_elem->HasMember(col.c_str())) {
|
|
if (is_insert_null) { // not found item, then insert a null object.
|
|
is_null = false;
|
|
rapidjson::Value nullObject(rapidjson::kNullType);
|
|
array_obj->PushBack(nullObject, mem_allocator);
|
|
}
|
|
continue;
|
|
}
|
|
rapidjson::Value* obj = &((*json_elem)[col.c_str()]);
|
|
if (obj->IsArray()) {
|
|
is_null = false;
|
|
for (int k = 0; k < obj->Size(); k++) {
|
|
array_obj->PushBack((*obj)[k], mem_allocator);
|
|
}
|
|
} else if (!obj->IsNull()) {
|
|
is_null = false;
|
|
array_obj->PushBack(*obj, mem_allocator);
|
|
}
|
|
}
|
|
}
|
|
|
|
root = is_null ? &(array_obj->SetNull()) : array_obj;
|
|
} else if (root->IsObject()){
|
|
if (!root->HasMember(col.c_str())) {
|
|
return nullptr;
|
|
} else {
|
|
root = &((*root)[col.c_str()]);
|
|
}
|
|
} else {
|
|
// root is not a nested type, return NULL
|
|
return nullptr;
|
|
}
|
|
}
|
|
|
|
if (UNLIKELY(index != -1)) {
|
|
// judge the rapidjson:Value, which base the top's result,
|
|
// if not array return NULL;else get the index value from the array
|
|
if (root->IsArray()) {
|
|
if (root->IsNull()) {
|
|
return nullptr;
|
|
} else if (index == -2) {
|
|
// [*]
|
|
array_obj = static_cast<rapidjson::Value*>(
|
|
mem_allocator.Malloc(sizeof(rapidjson::Value)));
|
|
array_obj->SetArray();
|
|
|
|
for (int j = 0; j < root->Size(); j++) {
|
|
rapidjson::Value v;
|
|
v.CopyFrom((*root)[j], mem_allocator);
|
|
array_obj->PushBack(v, mem_allocator);
|
|
}
|
|
root = array_obj;
|
|
} else if (index >= root->Size()) {
|
|
return nullptr;
|
|
} else {
|
|
root = &((*root)[index]);
|
|
}
|
|
} else {
|
|
return nullptr;
|
|
}
|
|
}
|
|
}
|
|
return root;
|
|
}
|
|
|
|
rapidjson::Value* JsonFunctions::get_json_object(
|
|
FunctionContext* context,
|
|
const std::string& json_string,
|
|
const std::string& path_string,
|
|
const JsonFunctionType& fntype,
|
|
rapidjson::Document* document) {
|
|
|
|
// split path by ".", and escape quota by "\"
|
|
// eg:
|
|
// '$.text#abc.xyz' -> [$, text#abc, xyz]
|
|
// '$."text.abc".xyz' -> [$, text.abc, xyz]
|
|
// '$."text.abc"[1].xyz' -> [$, text.abc[1], xyz]
|
|
std::vector<JsonPath>* parsed_paths;
|
|
std::vector<JsonPath> tmp_parsed_paths;
|
|
#ifndef BE_TEST
|
|
parsed_paths = reinterpret_cast<std::vector<JsonPath>*>(context->get_function_state(FunctionContext::FRAGMENT_LOCAL));
|
|
if (parsed_paths == nullptr) {
|
|
boost::tokenizer<boost::escaped_list_separator<char>> tok(path_string, boost::escaped_list_separator<char>("\\", ".", "\""));
|
|
std::vector<std::string> paths(tok.begin(), tok.end());
|
|
get_parsed_paths(paths, &tmp_parsed_paths);
|
|
parsed_paths = &tmp_parsed_paths;
|
|
}
|
|
#else
|
|
boost::tokenizer<boost::escaped_list_separator<char>> tok(path_string, boost::escaped_list_separator<char>("\\", ".", "\""));
|
|
std::vector<std::string> paths(tok.begin(), tok.end());
|
|
get_parsed_paths(paths, &tmp_parsed_paths);
|
|
parsed_paths = &tmp_parsed_paths;
|
|
#endif
|
|
|
|
VLOG(10) << "first parsed path: " << (*parsed_paths)[0].debug_string();
|
|
|
|
if (!(*parsed_paths)[0].is_valid) {
|
|
return document;
|
|
}
|
|
|
|
if (UNLIKELY((*parsed_paths).size() == 1)) {
|
|
if (fntype == JSON_FUN_STRING) {
|
|
document->SetString(json_string.c_str(), document->GetAllocator());
|
|
} else {
|
|
return document;
|
|
}
|
|
}
|
|
|
|
//rapidjson::Document document;
|
|
document->Parse(json_string.c_str());
|
|
if (UNLIKELY(document->HasParseError())) {
|
|
VLOG(1) << "Error at offset " << document->GetErrorOffset()
|
|
<< ": " << GetParseError_En(document->GetParseError());
|
|
document->SetNull();
|
|
return document;
|
|
}
|
|
return match_value(*parsed_paths, document, document->GetAllocator());
|
|
}
|
|
|
|
rapidjson::Value* JsonFunctions::get_json_array_from_parsed_json(
|
|
const std::string& json_path,
|
|
rapidjson::Value* document,
|
|
rapidjson::Document::AllocatorType& mem_allocator) {
|
|
|
|
std::vector<JsonPath> vec;
|
|
parse_json_paths(json_path, &vec);
|
|
return get_json_array_from_parsed_json(vec, document, mem_allocator);
|
|
}
|
|
|
|
rapidjson::Value* JsonFunctions::get_json_array_from_parsed_json(
|
|
const std::vector<JsonPath>& parsed_paths,
|
|
rapidjson::Value* document,
|
|
rapidjson::Document::AllocatorType& mem_allocator) {
|
|
|
|
if (!parsed_paths[0].is_valid) {
|
|
return nullptr;
|
|
}
|
|
|
|
rapidjson::Value* root = match_value(parsed_paths, document, mem_allocator, true);
|
|
if (root == nullptr || root == document) { // not found
|
|
return nullptr;
|
|
} else if (!root->IsArray()) {
|
|
rapidjson::Value* array_obj = nullptr;
|
|
array_obj = static_cast<rapidjson::Value*>(
|
|
mem_allocator.Malloc(sizeof(rapidjson::Value)));
|
|
array_obj->SetArray();
|
|
array_obj->PushBack(*root, mem_allocator);
|
|
return array_obj;
|
|
}
|
|
return root;
|
|
}
|
|
|
|
|
|
rapidjson::Value* JsonFunctions::get_json_object_from_parsed_json(
|
|
const std::vector<JsonPath>& parsed_paths,
|
|
rapidjson::Value* document,
|
|
rapidjson::Document::AllocatorType& mem_allocator) {
|
|
|
|
if (!parsed_paths[0].is_valid) {
|
|
return nullptr;
|
|
}
|
|
|
|
rapidjson::Value* root = match_value(parsed_paths, document, mem_allocator, true);
|
|
if (root == nullptr || root == document) { // not found
|
|
return nullptr;
|
|
}
|
|
return root;
|
|
}
|
|
|
|
void JsonFunctions::json_path_prepare(
|
|
doris_udf::FunctionContext* context,
|
|
doris_udf::FunctionContext::FunctionStateScope scope) {
|
|
if (scope != FunctionContext::FRAGMENT_LOCAL) {
|
|
return;
|
|
}
|
|
|
|
if (!context->is_arg_constant(1)) {
|
|
return;
|
|
}
|
|
StringVal* path = reinterpret_cast<StringVal*>(context->get_constant_arg(1));
|
|
if (path->is_null) {
|
|
return;
|
|
}
|
|
|
|
std::string path_str(reinterpret_cast<char*>(path->ptr), path->len);
|
|
boost::tokenizer<boost::escaped_list_separator<char>> tok(path_str,
|
|
boost::escaped_list_separator<char>("\\", ".", "\""));
|
|
std::vector<std::string> path_exprs(tok.begin(), tok.end());
|
|
std::vector<JsonPath>* parsed_paths = new std::vector<JsonPath>();
|
|
get_parsed_paths(path_exprs, parsed_paths);
|
|
|
|
context->set_function_state(scope, parsed_paths);
|
|
VLOG(10) << "prepare json path. size: " << parsed_paths->size();
|
|
}
|
|
|
|
void JsonFunctions::json_path_close(
|
|
doris_udf::FunctionContext* context,
|
|
doris_udf::FunctionContext::FunctionStateScope scope) {
|
|
if (scope != FunctionContext::FRAGMENT_LOCAL) {
|
|
return;
|
|
}
|
|
std::vector<JsonPath>* parsed_paths = reinterpret_cast<std::vector<JsonPath>*>(context->get_function_state(scope));
|
|
if (parsed_paths != nullptr) {
|
|
delete parsed_paths;
|
|
VLOG(10) << "close json path";
|
|
}
|
|
}
|
|
|
|
void JsonFunctions::parse_json_paths(
|
|
const std::string& path_string,
|
|
std::vector<JsonPath>* parsed_paths) {
|
|
// split path by ".", and escape quota by "\"
|
|
// eg:
|
|
// '$.text#abc.xyz' -> [$, text#abc, xyz]
|
|
// '$."text.abc".xyz' -> [$, text.abc, xyz]
|
|
// '$."text.abc"[1].xyz' -> [$, text.abc[1], xyz]
|
|
boost::tokenizer<boost::escaped_list_separator<char>> tok(path_string, boost::escaped_list_separator<char>("\\", ".", "\""));
|
|
std::vector<std::string> paths(tok.begin(), tok.end());
|
|
get_parsed_paths(paths, parsed_paths);
|
|
}
|
|
|
|
void JsonFunctions::get_parsed_paths(
|
|
const std::vector<std::string>& path_exprs,
|
|
std::vector<JsonPath>* parsed_paths) {
|
|
|
|
if (path_exprs[0] != "$") {
|
|
parsed_paths->emplace_back("", -1, false);
|
|
} else {
|
|
parsed_paths->emplace_back("$", -1, true);
|
|
}
|
|
|
|
for (int i = 1; i < path_exprs.size(); i++) {
|
|
std::string col;
|
|
std::string index;
|
|
if (UNLIKELY(!RE2::FullMatch(path_exprs[i], JSON_PATTERN, &col, &index))) {
|
|
parsed_paths->emplace_back("", -1, false);
|
|
} else {
|
|
int idx = -1;
|
|
if (!index.empty()) {
|
|
if (index == "*") {
|
|
idx = -2;
|
|
} else {
|
|
idx = atoi(index.c_str());
|
|
}
|
|
}
|
|
parsed_paths->emplace_back(col, idx, true);
|
|
}
|
|
}
|
|
}
|
|
|
|
}
|