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GoExecutor.cpp
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GoExecutor.cpp
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/* Copyright (c) 2018 vesoft inc. All rights reserved.
*
* This source code is licensed under Apache 2.0 License,
* attached with Common Clause Condition 1.0, found in the LICENSES directory.
*/
#include "base/Base.h"
#include "graph/GoExecutor.h"
#include "graph/SchemaHelper.h"
#include "dataman/RowReader.h"
#include "dataman/RowSetReader.h"
#include "dataman/ResultSchemaProvider.h"
#include <boost/functional/hash.hpp>
DEFINE_bool(filter_pushdown, true, "If pushdown the filter to storage.");
DEFINE_bool(trace_go, false, "Whether to dump the detail trace log from one go request");
namespace nebula {
namespace graph {
using SchemaProps = std::unordered_map<std::string, std::vector<std::string>>;
using nebula::cpp2::SupportedType;
GoExecutor::GoExecutor(Sentence *sentence, ExecutionContext *ectx)
: TraverseExecutor(ectx, "go") {
// The RTTI is guaranteed by Sentence::Kind,
// so we use `static_cast' instead of `dynamic_cast' for the sake of efficiency.
sentence_ = static_cast<GoSentence*>(sentence);
}
Status GoExecutor::prepare() {
return Status::OK();
}
Status GoExecutor::prepareClauses() {
DCHECK(sentence_ != nullptr);
Status status;
expCtx_ = std::make_unique<ExpressionContext>();
expCtx_->setStorageClient(ectx()->getStorageClient());
do {
status = checkIfGraphSpaceChosen();
if (!status.ok()) {
break;
}
status = prepareStep();
if (!status.ok()) {
break;
}
status = prepareFrom();
if (!status.ok()) {
break;
}
status = prepareOver();
if (!status.ok()) {
break;
}
status = prepareWhere();
if (!status.ok()) {
break;
}
status = prepareYield();
if (!status.ok()) {
break;
}
status = prepareNeededProps();
if (!status.ok()) {
break;
}
status = prepareDistinct();
if (!status.ok()) {
break;
}
status = checkNeededProps();
if (!status.ok()) {
break;
}
} while (false);
if (!status.ok()) {
LOG(ERROR) << "Preparing failed: " << status;
return status;
}
return status;
}
void GoExecutor::execute() {
auto status = prepareClauses();
if (!status.ok()) {
doError(std::move(status));
return;
}
if (steps_ == 0) {
// #2100
// TODO(shylock) unify the steps checking
onEmptyInputs();
return;
}
// record means the reponse index [1, steps]
if (recordFrom_ == 0) {
recordFrom_ = 1;
CHECK_GE(steps_, recordFrom_);
}
status = setupStarts();
if (!status.ok()) {
doError(std::move(status));
return;
}
if (index_ == nullptr) {
index_ = std::make_unique<InterimIndex>();
}
if (starts_.empty()) {
onEmptyInputs();
return;
}
if (distinct_) {
std::unordered_set<VertexID> uniqID;
for (auto id : starts_) {
uniqID.emplace(id);
}
starts_ = std::vector<VertexID>(uniqID.begin(), uniqID.end());
}
stepOut();
}
Status GoExecutor::prepareStep() {
auto *clause = sentence_->stepClause();
if (clause != nullptr) {
recordFrom_ = clause->recordFrom();
steps_ = clause->recordTo();
}
if (steps_ != 1) {
backTracker_ = std::make_unique<VertexBackTracker>();
}
return Status::OK();
}
Status GoExecutor::prepareFrom() {
Status status = Status::OK();
auto *clause = sentence_->fromClause();
do {
if (clause == nullptr) {
LOG(ERROR) << "From clause shall never be null";
return Status::Error("From clause shall never be null");
}
if (clause->isRef()) {
auto *expr = clause->ref();
if (expr->isInputExpression()) {
fromType_ = kPipe;
auto *iexpr = static_cast<InputPropertyExpression*>(expr);
colname_ = iexpr->prop();
} else if (expr->isVariableExpression()) {
fromType_ = kVariable;
auto *vexpr = static_cast<VariablePropertyExpression*>(expr);
varname_ = vexpr->alias();
colname_ = vexpr->prop();
} else {
// No way to happen except memory corruption
LOG(ERROR) << "Unknown kind of expression";
return Status::Error("Unknown kind of expression");
}
if (colname_ != nullptr && *colname_ == "*") {
status = Status::Error("Can not use `*' to reference a vertex id column.");
break;
}
break;
}
auto space = ectx()->rctx()->session()->space();
expCtx_->setSpace(space);
auto vidList = clause->vidList();
Getters getters;
for (auto *expr : vidList) {
expr->setContext(expCtx_.get());
status = expr->prepare();
if (!status.ok()) {
break;
}
auto value = expr->eval(getters);
if (!value.ok()) {
status = Status::Error();
break;
}
if (expr->isFunCallExpression()) {
auto *funcExpr = static_cast<FunctionCallExpression*>(expr);
if (*(funcExpr->name()) == "near") {
auto v = Expression::asString(value.value());
std::vector<VertexID> result;
folly::split(",", v, result, true);
starts_.insert(starts_.end(),
std::make_move_iterator(result.begin()),
std::make_move_iterator(result.end()));
continue;
}
}
auto v = value.value();
if (!Expression::isInt(v)) {
status = Status::Error("Vertex ID should be of type integer");
break;
}
starts_.push_back(Expression::asInt(v));
}
fromType_ = kInstantExpr;
if (!status.ok()) {
break;
}
} while (false);
return status;
}
Status GoExecutor::prepareOverAll() {
auto spaceId = ectx()->rctx()->session()->space();
auto edgeAllStatus = ectx()->schemaManager()->getAllEdge(spaceId);
if (!edgeAllStatus.ok()) {
return edgeAllStatus.status();
}
auto allEdge = edgeAllStatus.value();
for (auto &e : allEdge) {
auto edgeStatus = ectx()->schemaManager()->toEdgeType(spaceId, e);
if (!edgeStatus.ok()) {
return edgeStatus.status();
}
auto v = edgeStatus.value();
auto status = addToEdgeTypes(v);
if (!status.ok()) {
return status;
}
if (!expCtx_->addEdge(e, std::abs(v))) {
return Status::Error(folly::sformat("edge alias({}) was dup", e));
}
}
return Status::OK();
}
Status GoExecutor::prepareOver() {
Status status = Status::OK();
auto *clause = sentence_->overClause();
if (clause == nullptr) {
LOG(ERROR) << "Over clause shall never be null";
return Status::Error("Over clause shall never be null");
}
direction_ = clause->direction();
auto edges = clause->edges();
for (auto e : edges) {
if (e->isOverAll()) {
expCtx_->setOverAllEdge();
return prepareOverAll();
}
auto spaceId = ectx()->rctx()->session()->space();
auto edgeStatus = ectx()->schemaManager()->toEdgeType(spaceId, *e->edge());
if (!edgeStatus.ok()) {
return edgeStatus.status();
}
auto v = edgeStatus.value();
status = addToEdgeTypes(v);
if (!status.ok()) {
return status;
}
if (e->alias() != nullptr) {
if (!expCtx_->addEdge(*e->alias(), std::abs(v))) {
return Status::Error(folly::sformat("edge alias({}) was dup", *e->alias()));
}
} else {
if (!expCtx_->addEdge(*e->edge(), std::abs(v))) {
return Status::Error(folly::sformat("edge alias({}) was dup", *e->edge()));
}
}
}
return status;
}
Status GoExecutor::addToEdgeTypes(EdgeType type) {
switch (direction_) {
case OverClause::Direction::kForward: {
edgeTypes_.push_back(type);
break;
}
case OverClause::Direction::kBackward: {
type = -type;
edgeTypes_.push_back(type);
break;
}
case OverClause::Direction::kBidirect: {
edgeTypes_.push_back(type);
type = -type;
edgeTypes_.push_back(type);
break;
}
default: {
return Status::Error("Unkown direction type: %ld", static_cast<int64_t>(direction_));
}
}
return Status::OK();
}
Status GoExecutor::prepareWhere() {
auto *clause = sentence_->whereClause();
whereWrapper_ = std::make_unique<WhereWrapper>(clause);
auto status = whereWrapper_->prepare(expCtx_.get());
return status;
}
Status GoExecutor::prepareYield() {
auto *clause = sentence_->yieldClause();
// this preparation depends on interim result,
// it can only be called after getting results of the previous executor,
// but if we can do the semantic analysis before execution,
// then we can do the preparation before execution
// TODO: make it possible that this preparation not depends on interim result
if (clause != nullptr) {
yieldClauseWrapper_ = std::make_unique<YieldClauseWrapper>(clause);
auto *varHolder = ectx()->variableHolder();
auto status = yieldClauseWrapper_->prepare(inputs_.get(), varHolder, yields_);
if (!status.ok()) {
return status;
}
for (auto *col : yields_) {
if (!col->getFunName().empty()) {
return Status::SyntaxError("Do not support in aggregated query without group by");
}
}
}
return Status::OK();
}
Status GoExecutor::prepareNeededProps() {
auto status = Status::OK();
do {
for (auto *col : yields_) {
col->expr()->setContext(expCtx_.get());
status = col->expr()->prepare();
if (!status.ok()) {
break;
}
}
if (!status.ok()) {
break;
}
if (expCtx_->hasVariableProp()) {
if (fromType_ != kVariable) {
status = Status::Error("A variable must be referred in FROM "
"before used in WHERE or YIELD");
break;
}
auto &variables = expCtx_->variables();
if (variables.size() > 1) {
status = Status::Error("Only one variable allowed to use");
break;
}
auto &var = *variables.begin();
if (var != *varname_) {
status = Status::Error("Variable name not match: `%s' vs. `%s'",
var.c_str(), varname_->c_str());
break;
}
}
if (expCtx_->hasInputProp()) {
if (fromType_ != kPipe) {
status = Status::Error("`$-' must be referred in FROM "
"before used in WHERE or YIELD");
break;
}
}
auto &tagMap = expCtx_->getTagMap();
auto spaceId = ectx()->rctx()->session()->space();
for (auto &entry : tagMap) {
auto tagId = ectx()->schemaManager()->toTagID(spaceId, entry.first);
if (!tagId.ok()) {
status = Status::Error("Tag `%s' not found.", entry.first.c_str());
break;
}
entry.second = tagId.value();
}
} while (false);
return status;
}
Status GoExecutor::prepareDistinct() {
auto *clause = sentence_->yieldClause();
if (clause != nullptr) {
distinct_ = clause->isDistinct();
// TODO Consider distinct pushdown later, depends on filter and some other clause pushdown.
distinctPushDown_ =
!((expCtx_->hasSrcTagProp() || expCtx_->hasEdgeProp()) && expCtx_->hasDstTagProp());
}
return Status::OK();
}
Status GoExecutor::checkNeededProps() {
auto space = ectx()->rctx()->session()->space();
TagID tagId;
auto srcTagProps = expCtx_->srcTagProps();
auto dstTagProps = expCtx_->dstTagProps();
srcTagProps.insert(srcTagProps.begin(),
std::make_move_iterator(dstTagProps.begin()),
std::make_move_iterator(dstTagProps.end()));
for (auto &pair : srcTagProps) {
auto found = expCtx_->getTagId(pair.first, tagId);
if (!found) {
return Status::Error("Tag `%s' not found.", pair.first.c_str());
}
auto ts = ectx()->schemaManager()->getTagSchema(space, tagId);
if (ts == nullptr) {
return Status::Error("No tag schema for %s", pair.first.c_str());
}
if (ts->getFieldIndex(pair.second) == -1) {
return Status::Error("`%s' is not a prop of `%s'",
pair.second.c_str(), pair.first.c_str());
}
}
EdgeType edgeType;
auto edgeProps = expCtx_->aliasProps();
for (auto &pair : edgeProps) {
auto found = expCtx_->getEdgeType(pair.first, edgeType);
if (!found) {
return Status::Error("Edge `%s' not found.", pair.first.c_str());
}
auto propName = pair.second;
if (propName == _SRC || propName == _DST
|| propName == _RANK || propName == _TYPE) {
continue;
}
auto es = ectx()->schemaManager()->getEdgeSchema(space, std::abs(edgeType));
if (es == nullptr) {
return Status::Error("No edge schema for %s", pair.first.c_str());
}
if (es->getFieldIndex(propName) == -1) {
return Status::Error("`%s' is not a prop of `%s'",
propName.c_str(), pair.first.c_str());
}
}
return Status::OK();
}
Status GoExecutor::setupStarts() {
// Literal vertex ids
if (!starts_.empty()) {
return Status::OK();
}
const auto *inputs = inputs_.get();
// Take one column from a variable
if (varname_ != nullptr) {
bool existing = false;
auto *varInputs = ectx()->variableHolder()->get(*varname_, &existing);
if (varInputs == nullptr && !existing) {
return Status::Error("Variable `%s' not defined", varname_->c_str());
}
DCHECK(inputs == nullptr);
inputs = varInputs;
}
// No error happened, but we are having empty inputs
if (inputs == nullptr || !inputs->hasData()) {
return Status::OK();
}
auto status = checkIfDuplicateColumn();
if (!status.ok()) {
return status;
}
auto result = inputs->getVIDs(*colname_);
if (!result.ok()) {
LOG(ERROR) << "Get vid fail: " << *colname_;
return std::move(result).status();
}
starts_ = std::move(result).value();
auto indexResult = inputs->buildIndex(*colname_);
if (!indexResult.ok()) {
return std::move(indexResult).status();
}
index_ = std::move(indexResult).value();
return Status::OK();
}
void GoExecutor::setupResponse(cpp2::ExecutionResponse &resp) {
if (resp_ == nullptr) {
resp_ = std::make_unique<cpp2::ExecutionResponse>();
}
resp = std::move(*resp_);
}
void GoExecutor::stepOut() {
auto spaceId = ectx()->rctx()->session()->space();
auto status = getStepOutProps();
if (!status.ok()) {
doError(std::move(status).status());
return;
}
auto returns = status.value();
std::string filterPushdown = "";
if (FLAGS_filter_pushdown && isFinalStep()
&& direction_ == OverClause::Direction::kForward) {
// TODO: not support filter pushdown in reversely traversal now.
filterPushdown = whereWrapper_->filterPushdown_;
}
VLOG(1) << "edge type size: " << edgeTypes_.size()
<< " return cols: " << returns.size();
auto future = ectx()->getStorageClient()->getNeighbors(spaceId,
starts_,
edgeTypes_,
filterPushdown,
std::move(returns));
auto *runner = ectx()->rctx()->runner();
auto cb = [this] (auto &&result) {
auto completeness = result.completeness();
if (completeness == 0) {
doError(Status::Error("Get neighbors failed"));
return;
} else if (completeness != 100) {
// TODO(dutor) We ought to let the user know that the execution was partially
// performed, even in the case that this happened in the intermediate process.
// Or, make this case configurable at runtime.
// For now, we just do some logging and keep going.
LOG(INFO) << "Get neighbors partially failed: " << completeness << "%";
for (auto &error : result.failedParts()) {
LOG(ERROR) << "part: " << error.first
<< "error code: " << static_cast<int>(error.second);
}
}
if (FLAGS_trace_go) {
LOG(INFO) << "Step:" << curStep_
<< " finished, total request vertices " << starts_.size();
auto& hostLatency = result.hostLatency();
for (size_t i = 0; i < hostLatency.size(); i++) {
LOG(INFO) << std::get<0>(hostLatency[i])
<< ", time cost " << std::get<1>(hostLatency[i])
<< "us / " << std::get<2>(hostLatency[i])
<< "us, total results " << result.responses()[i].get_vertices()->size();
}
}
onStepOutResponse(std::move(result));
};
auto error = [this] (auto &&e) {
LOG(ERROR) << "Exception when handle out-bounds/in-bounds: " << e.what();
doError(Status::Error("Exception when handle out-bounds/in-bounds: %s.",
e.what().c_str()));
};
std::move(future).via(runner).thenValue(cb).thenError(error);
}
#define GO_EXIT() do { \
if (!isRecord()) { \
onEmptyInputs(); \
return; \
} else { \
maybeFinishExecution(); \
return; \
} \
} while (0);
void GoExecutor::onStepOutResponse(RpcResponse &&rpcResp) {
joinResp(std::move(rpcResp));
// back trace each step
CHECK_GT(records_.size(), 0);
auto dsts = getDstIdsFromRespWithBackTrack(records_.back());
if (isFinalStep()) {
GO_EXIT();
} else {
starts_ = std::move(dsts);
if (starts_.empty()) {
GO_EXIT();
}
curStep_++;
stepOut();
}
}
#undef GO_EXIT
void GoExecutor::maybeFinishExecution() {
auto requireDstProps = expCtx_->hasDstTagProp();
// Non-reversely traversal, no properties required on destination nodes
// Or, Reversely traversal but no properties on edge and destination nodes required.
// Note that the `dest` which used in reversely traversal means the `src` in foword edge.
if (!requireDstProps) {
finishExecution();
return;
}
CHECK_GT(recordFrom_, 0);
CHECK_GE(records_.size(), recordFrom_ - 1) << "Current step " << curStep_;
auto dstIds = getDstIdsFromResps(records_.begin() + recordFrom_ - 1, records_.end());
// Reaching the dead end
if (dstIds.empty()) {
onEmptyInputs();
return;
}
DCHECK(requireDstProps);
// Only properties on destination nodes required
fetchVertexProps(std::move(dstIds));
return;
}
void GoExecutor::onVertexProps(RpcResponse &&rpcResp) {
UNUSED(rpcResp);
}
std::vector<VertexID> GoExecutor::getDstIdsFromResps(std::vector<RpcResponse>::iterator begin,
std::vector<RpcResponse>::iterator end) const {
std::unordered_set<VertexID> set;
for (auto it = begin; it != end; ++it) {
for (const auto &resp : it->responses()) {
auto *vertices = resp.get_vertices();
if (vertices == nullptr) {
continue;
}
for (const auto &vdata : *vertices) {
for (const auto &edata : vdata.edge_data) {
for (const auto& edge : edata.get_edges()) {
auto dst = edge.get_dst();
set.emplace(dst);
}
}
}
}
}
return std::vector<VertexID>(set.begin(), set.end());
}
std::vector<VertexID> GoExecutor::getDstIdsFromRespWithBackTrack(const RpcResponse &rpcResp) const {
// back trace in current step
// To avoid overlap in current step edges
// For example
// Dst , Src
// 6 , 1
// 7 , 6
// Will mistake lead to 7->6 if insert edge(dst, src) one by one
// So read all roots of current step first , then insert them
std::multimap<VertexID, VertexID> backTrace;
std::unordered_set<VertexID> set;
for (const auto &resp : rpcResp.responses()) {
auto *vertices = resp.get_vertices();
if (vertices == nullptr) {
continue;
}
for (const auto &vdata : *vertices) {
for (const auto &edata : vdata.edge_data) {
for (const auto& edge : edata.get_edges()) {
auto dst = edge.get_dst();
if (!isFinalStep() && backTracker_ != nullptr) {
auto range = backTracker_->get(vdata.get_vertex_id());
if (range.first == range.second) { // not found root
backTrace.emplace(dst, vdata.get_vertex_id());
}
for (auto trace = range.first; trace != range.second; ++trace) {
backTrace.emplace(dst, trace->second);
}
}
set.emplace(dst);
}
}
}
}
if (!isFinalStep() && backTracker_ != nullptr) {
backTracker_->inject(backTrace);
}
return std::vector<VertexID>(set.begin(), set.end());
}
void GoExecutor::finishExecution() {
// MayBe we can do better.
std::vector<std::unique_ptr<YieldColumn>> yc;
if (expCtx_->isOverAllEdge() && yields_.empty()) {
for (const auto &alias : expCtx_->getEdgeAlias()) {
auto dummy = new std::string(alias);
auto dummy_exp = new EdgeDstIdExpression(dummy);
auto ptr = std::make_unique<YieldColumn>(dummy_exp);
dummy_exp->setContext(expCtx_.get());
yields_.emplace_back(ptr.get());
yc.emplace_back(std::move(ptr));
}
}
if (onResult_) {
std::unique_ptr<InterimResult> outputs;
if (!setupInterimResult(outputs)) {
return;
}
onResult_(std::move(outputs));
} else {
auto start = time::WallClock::fastNowInMicroSec();
resp_ = std::make_unique<cpp2::ExecutionResponse>();
resp_->set_column_names(getResultColumnNames());
auto ret = toThriftResponse();
if (FLAGS_trace_go) {
LOG(INFO) << "Process the resp from storaged, total time "
<< time::WallClock::fastNowInMicroSec() - start << "us";
}
if (!ret.ok()) {
LOG(ERROR) << "Get rows failed: " << ret.status();
return;
}
if (!ret.value().empty()) {
resp_->set_rows(std::move(ret).value());
}
}
doFinish(Executor::ProcessControl::kNext);
}
StatusOr<std::vector<cpp2::RowValue>> GoExecutor::toThriftResponse() const {
std::vector<cpp2::RowValue> rows;
int64_t totalRows = 0;
CHECK_GT(recordFrom_, 0);
for (auto rpcResp = records_.begin() + recordFrom_ - 1; rpcResp != records_.end(); ++rpcResp) {
for (const auto& resp : rpcResp->responses()) {
if (resp.get_total_edges() != nullptr) {
totalRows += *resp.get_total_edges();
}
}
}
rows.reserve(totalRows);
auto cb = [&] (std::vector<VariantType> record,
const std::vector<nebula::cpp2::SupportedType>& colTypes) -> Status {
std::vector<cpp2::ColumnValue> row;
row.reserve(record.size());
for (size_t i = 0; i < colTypes.size(); i++) {
auto& column = record[i];
auto& type = colTypes[i];
row.emplace_back();
switch (type) {
case nebula::cpp2::SupportedType::BOOL:
row.back().set_bool_val(boost::get<bool>(column));
break;
case nebula::cpp2::SupportedType::INT:
row.back().set_integer(boost::get<int64_t>(column));
break;
case nebula::cpp2::SupportedType::DOUBLE:
row.back().set_double_precision(boost::get<double>(column));
break;
case nebula::cpp2::SupportedType::FLOAT:
row.back().set_single_precision(boost::get<double>(column));
break;
case nebula::cpp2::SupportedType::STRING:
row.back().set_str(boost::get<std::string>(column));
break;
case nebula::cpp2::SupportedType::TIMESTAMP:
row.back().set_timestamp(boost::get<int64_t>(column));
break;
case nebula::cpp2::SupportedType::VID:
row.back().set_id(boost::get<int64_t>(column));
break;
default:
{
switch (column.which()) {
case VAR_INT64:
row.back().set_integer(boost::get<int64_t>(column));
break;
case VAR_DOUBLE:
row.back().set_double_precision(boost::get<double>(column));
break;
case VAR_BOOL:
break;
case VAR_STR:
row.back().set_str(boost::get<std::string>(column));
break;
default:
LOG(FATAL) << "Unknown VariantType: " << column.which();
}
}
break;
}
}
rows.emplace_back();
rows.back().set_columns(std::move(row));
return Status::OK();
}; // cb
if (!processFinalResult(cb)) {
return Status::Error("process failed");
}
if (FLAGS_trace_go) {
LOG(INFO) << "Total rows:" << rows.size();
}
return rows;
}
StatusOr<std::vector<storage::cpp2::PropDef>> GoExecutor::getStepOutProps() {
std::vector<storage::cpp2::PropDef> props;
if (!isRecord()) {
for (auto &e : edgeTypes_) {
storage::cpp2::PropDef pd;
pd.owner = storage::cpp2::PropOwner::EDGE;
pd.name = _DST;
pd.id.set_edge_type(e);
props.emplace_back(std::move(pd));
}
return props;
} else {
for (auto &e : edgeTypes_) {
storage::cpp2::PropDef pd;
pd.owner = storage::cpp2::PropOwner::EDGE;
pd.name = _DST;
pd.id.set_edge_type(e);
props.emplace_back(std::move(pd));
VLOG(3) << "Need edge props: " << e << ", _dst";
}
auto spaceId = ectx()->rctx()->session()->space();
for (auto &tagProp : expCtx_->srcTagProps()) {
storage::cpp2::PropDef pd;
pd.owner = storage::cpp2::PropOwner::SOURCE;
pd.name = tagProp.second;
auto status = ectx()->schemaManager()->toTagID(spaceId, tagProp.first);
if (!status.ok()) {
return Status::Error("No schema found for '%s'", tagProp.first.c_str());
}
auto tagId = status.value();
pd.id.set_tag_id(tagId);
props.emplace_back(std::move(pd));
VLOG(3) << "Need tag src props: " << tagProp.first << ", " << tagProp.second;
}
for (auto &prop : expCtx_->aliasProps()) {
if (prop.second == _DST) {
continue;
}
storage::cpp2::PropDef pd;
pd.owner = storage::cpp2::PropOwner::EDGE;
pd.name = prop.second;
EdgeType edgeType;
if (!expCtx_->getEdgeType(prop.first, edgeType)) {
return Status::Error("the edge was not found '%s'", prop.first.c_str());
}
pd.id.set_edge_type(edgeType);
switch (direction_) {
case OverClause::Direction::kForward: {
props.emplace_back(std::move(pd));
break;
}
case OverClause::Direction::kBackward: {
edgeType = -edgeType;
pd.id.set_edge_type(edgeType);
props.emplace_back(std::move(pd));
break;
}
case OverClause::Direction::kBidirect: {
props.emplace_back(pd);
edgeType = -edgeType;
pd.id.set_edge_type(edgeType);
props.emplace_back(std::move(pd));
break;
}
default:
return Status::Error(
"Unknown direction: %ld", static_cast<int64_t>(direction_));
}
VLOG(3) << "Need edge props: " << prop.first << ", " << prop.second;
}
return props;
}
}
StatusOr<std::vector<storage::cpp2::PropDef>> GoExecutor::getDstProps() {
std::vector<storage::cpp2::PropDef> props;
auto spaceId = ectx()->rctx()->session()->space();
for (auto &tagProp : expCtx_->dstTagProps()) {
storage::cpp2::PropDef pd;
pd.owner = storage::cpp2::PropOwner::DEST;
pd.name = tagProp.second;
auto status = ectx()->schemaManager()->toTagID(spaceId, tagProp.first);
if (!status.ok()) {
return Status::Error("No schema found for '%s'", tagProp.first.c_str());
}
auto tagId = status.value();
pd.id.set_tag_id(tagId);
props.emplace_back(std::move(pd));
VLOG(3) << "Need dst tag props: " << tagProp.first << ", " << tagProp.second;
}
return props;
}
void GoExecutor::fetchVertexProps(std::vector<VertexID> ids) {
auto spaceId = ectx()->rctx()->session()->space();
auto status = getDstProps();
if (!status.ok()) {
doError(std::move(status).status());
return;
}
auto returns = status.value();
auto future = ectx()->getStorageClient()->getVertexProps(spaceId, ids, returns);
auto *runner = ectx()->rctx()->runner();
auto cb = [this] (auto &&result) mutable {
auto completeness = result.completeness();
if (completeness == 0) {
doError(Status::Error("Get dest props failed"));
return;
} else if (completeness != 100) {
LOG(INFO) << "Get neighbors partially failed: " << completeness << "%";
for (auto &error : result.failedParts()) {
LOG(ERROR) << "part: " << error.first
<< "error code: " << static_cast<int>(error.second);
}
}
if (vertexHolder_ == nullptr) {
vertexHolder_ = std::make_unique<VertexHolder>();
}
for (auto &resp : result.responses()) {
vertexHolder_->add(resp);
}
finishExecution();
return;
};
auto error = [this] (auto &&e) {
LOG(ERROR) << "Exception when get vertex in go: " << e.what();
doError(Status::Error("Exception when get vertex in go: %s.",
e.what().c_str()));
};
std::move(future).via(runner).thenValue(cb).thenError(error);
}
std::vector<std::string> GoExecutor::getResultColumnNames() const {
std::vector<std::string> result;
result.reserve(yields_.size());
for (auto *col : yields_) {
if (col->alias() == nullptr) {
result.emplace_back(col->expr()->toString());
} else {
result.emplace_back(*col->alias());
}
}
return result;
}
bool GoExecutor::setupInterimResult(std::unique_ptr<InterimResult> &result) const {
// Generic results
result = std::make_unique<InterimResult>(getResultColumnNames());
std::shared_ptr<SchemaWriter> schema;
std::unique_ptr<RowSetWriter> rsWriter;
auto cb = [&] (std::vector<VariantType> record,
const std::vector<nebula::cpp2::SupportedType>& colTypes) -> Status {
if (schema == nullptr) {
schema = std::make_shared<SchemaWriter>();
auto colnames = getResultColumnNames();
if (record.size() != colTypes.size()) {
LOG(ERROR) << "Record size: " << record.size()
<< " != column type size: " << colTypes.size();
return Status::Error("Record size is not equal to column type size, [%lu != %lu]",
record.size(), colTypes.size());
}
for (auto i = 0u; i < record.size(); i++) {
SupportedType type;
if (colTypes[i] == SupportedType::UNKNOWN) {
switch (record[i].which()) {
case VAR_INT64:
// all integers in InterimResult are regarded as type of INT
type = SupportedType::INT;
break;
case VAR_DOUBLE:
type = SupportedType::DOUBLE;
break;
case VAR_BOOL: