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#pragma once
#include "resource.h"
#include "compile_path.h"
#include <yql/essentials/core/sql_types/yql_atom_enums.h>
#include <yql/essentials/public/udf/udf_type_builder.h>
#include <yql/essentials/public/udf/udf_value.h>
#include <yql/essentials/public/udf/udf_helpers.h>
#include <yql/essentials/minikql/dom/node.h>
#include <util/generic/yexception.h>
namespace NJson2Udf {
using namespace NKikimr;
using namespace NUdf;
using namespace NYql;
using namespace NDom;
using namespace NJsonPath;
template <EDataSlot InputType, EJsonQueryWrap Mode>
class TSqlQuery: public TBoxedValue {
public:
explicit TSqlQuery(TSourcePosition pos)
: Pos_(pos)
{
}
static TStringRef Name();
static bool DeclareSignature(
const TStringRef& name,
TType* userType,
IFunctionTypeInfoBuilder& builder,
bool typesOnly) {
Y_UNUSED(userType);
if (name != Name()) {
return false;
}
auto jsonType = builder.Resource(JSON_NODE_RESOURCE_NAME);
auto optionalJsonType = builder.Optional()->Item(jsonType).Build();
TType* inputType = nullptr;
if constexpr (InputType == EDataSlot::JsonDocument) {
inputType = builder.SimpleType<TJsonDocument>();
} else {
inputType = jsonType;
}
auto inputOptionalType = builder.Optional()->Item(inputType).Build();
auto jsonPathType = builder.Resource(JSONPATH_RESOURCE_NAME);
auto dictType = builder.Dict()->Key<TUtf8>().Value(jsonType).Build();
/*
Arguments:
0. Resource<JsonNode>? or JsonDocument?. Input json
1. Resource<JsonPath>. Jsonpath to execute on json
2. Dict<TUtf8, Resource<JsonNode>>. Variables to pass into jsonpath
3. Bool. True - throw on empty result, false otherwise
4. Resource<JsonNode>?. Default value to return on empty result. Ignored if 2d argument is true
5. Bool. True - throw on error, false - otherwise
6. Resource<JsonNode>?. Default value to return on error. Ignored if 4th argument is true
*/
// we can't mark TSqlQuery as strict due to runtime throw policy setting
// TODO: optimizer can mark SqlQuery as strict if 3th/5th arguments are literal booleans
builder.Args()
->Add(inputOptionalType)
.Add(jsonPathType)
.Add(dictType)
.Add<bool>()
.Add(optionalJsonType)
.Add<bool>()
.Add(optionalJsonType)
.Done()
.Returns(optionalJsonType);
if (!typesOnly) {
builder.Implementation(new TSqlQuery(builder.GetSourcePosition()));
}
return true;
}
private:
TUnboxedValue Run(
const IValueBuilder* valueBuilder,
const TUnboxedValuePod* args) const final {
Y_UNUSED(valueBuilder);
try {
if (!args[0].HasValue()) {
return TUnboxedValuePod();
}
TValue jsonDom;
if constexpr (InputType == EDataSlot::JsonDocument) {
jsonDom = TValue(NBinaryJson::TBinaryJsonReader::Make(args[0].AsStringRef())->GetRootCursor());
} else {
jsonDom = TValue(args[0]);
}
auto* jsonPathResource = static_cast<TJsonPathResource*>(args[1].AsBoxed().Get());
const auto& jsonPath = *jsonPathResource->Get();
const bool throwOnEmpty = args[3].Get<bool>();
const auto emptyDefault = args[4];
const bool throwOnError = args[5].Get<bool>();
const auto errorDefault = args[6];
const auto variables = DictToVariables(args[2]);
auto result = ExecuteJsonPath(jsonPath, jsonDom, variables, valueBuilder);
const auto handleCase = [](TStringBuf message, bool throws, const TUnboxedValuePod& caseDefault) {
if (throws) {
ythrow yexception() << message;
}
return caseDefault;
};
if (result.IsError()) {
return handleCase(TStringBuilder() << "Error executing jsonpath:" << Endl << result.GetError() << Endl, throwOnError, errorDefault);
}
auto& nodes = result.GetNodes();
const bool isSingleStruct = nodes.size() == 1 && (nodes[0].Is(EValueType::Array) || nodes[0].Is(EValueType::Object));
if (Mode == EJsonQueryWrap::Wrap || (Mode == EJsonQueryWrap::ConditionalWrap && !isSingleStruct)) {
TVector<TUnboxedValue> converted;
converted.reserve(nodes.size());
for (auto& node : nodes) {
converted.push_back(node.ConvertToUnboxedValue(valueBuilder));
}
return MakeList(converted.data(), converted.size(), valueBuilder);
}
if (nodes.empty()) {
return handleCase("Empty result", throwOnEmpty, emptyDefault);
}
// No wrapping is applicable and result is not empty. Result must be a single object or array
if (nodes.size() > 1) {
return handleCase("Result consists of multiple items", throwOnError, errorDefault);
}
if (!nodes[0].Is(EValueType::Array) && !nodes[0].Is(EValueType::Object)) {
return handleCase("Result is neither object nor array", throwOnError, errorDefault);
}
return nodes[0].ConvertToUnboxedValue(valueBuilder);
} catch (const std::exception& e) {
UdfTerminate((TStringBuilder() << Pos_ << " " << e.what()).data());
}
}
TSourcePosition Pos_;
};
template <>
TStringRef TSqlQuery<EDataSlot::Json, EJsonQueryWrap::NoWrap>::Name() {
return "SqlQuery";
}
template <>
TStringRef TSqlQuery<EDataSlot::Json, EJsonQueryWrap::Wrap>::Name() {
return "SqlQueryWrap";
}
template <>
TStringRef TSqlQuery<EDataSlot::Json, EJsonQueryWrap::ConditionalWrap>::Name() {
return "SqlQueryConditionalWrap";
}
template <>
TStringRef TSqlQuery<EDataSlot::JsonDocument, EJsonQueryWrap::NoWrap>::Name() {
return "JsonDocumentSqlQuery";
}
template <>
TStringRef TSqlQuery<EDataSlot::JsonDocument, EJsonQueryWrap::Wrap>::Name() {
return "JsonDocumentSqlQueryWrap";
}
template <>
TStringRef TSqlQuery<EDataSlot::JsonDocument, EJsonQueryWrap::ConditionalWrap>::Name() {
return "JsonDocumentSqlQueryConditionalWrap";
}
}
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