mirror of https://gitee.com/bigwinds/arangodb
495 lines
19 KiB
C++
495 lines
19 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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/// DISCLAIMER
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///
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/// Copyright 2017 ArangoDB GmbH, Cologne, Germany
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///
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/// Licensed under the Apache License, Version 2.0 (the "License");
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/// you may not use this file except in compliance with the License.
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/// You may obtain a copy of the License at
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///
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/// http://www.apache.org/licenses/LICENSE-2.0
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///
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/// Unless required by applicable law or agreed to in writing, software
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/// distributed under the License is distributed on an "AS IS" BASIS,
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/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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/// See the License for the specific language governing permissions and
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/// limitations under the License.
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///
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/// Copyright holder is ArangoDB GmbH, Cologne, Germany
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///
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/// @author Michael Hackstein
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////////////////////////////////////////////////////////////////////////////////
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#include "AqlFunctionFeature.h"
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#include "Aql/AstNode.h"
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#include "Cluster/ServerState.h"
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#include "StorageEngine/EngineSelectorFeature.h"
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#include "StorageEngine/StorageEngine.h"
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using namespace arangodb;
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using namespace arangodb::application_features;
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using namespace arangodb::aql;
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/// @brief determines if code is executed on coordinator or not
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static ExecutionCondition const NotInCoordinator = [] {
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return !arangodb::ServerState::instance()->isRunningInCluster() ||
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!arangodb::ServerState::instance()->isCoordinator();
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};
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AqlFunctionFeature* AqlFunctionFeature::AQLFUNCTIONS = nullptr;
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AqlFunctionFeature::AqlFunctionFeature(
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application_features::ApplicationServer* server)
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: application_features::ApplicationFeature(server, "AQLFunctions"),
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_internalFunctionNames{
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{static_cast<int>(NODE_TYPE_OPERATOR_UNARY_PLUS), "UNARY_PLUS"},
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{static_cast<int>(NODE_TYPE_OPERATOR_UNARY_MINUS), "UNARY_MINUS"},
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{static_cast<int>(NODE_TYPE_OPERATOR_UNARY_NOT), "LOGICAL_NOT"},
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{static_cast<int>(NODE_TYPE_OPERATOR_BINARY_EQ), "RELATIONAL_EQUAL"},
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{static_cast<int>(NODE_TYPE_OPERATOR_BINARY_NE),
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"RELATIONAL_UNEQUAL"},
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{static_cast<int>(NODE_TYPE_OPERATOR_BINARY_GT),
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"RELATIONAL_GREATER"},
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{static_cast<int>(NODE_TYPE_OPERATOR_BINARY_GE),
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"RELATIONAL_GREATEREQUAL"},
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{static_cast<int>(NODE_TYPE_OPERATOR_BINARY_LT), "RELATIONAL_LESS"},
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{static_cast<int>(NODE_TYPE_OPERATOR_BINARY_LE),
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"RELATIONAL_LESSEQUAL"},
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{static_cast<int>(NODE_TYPE_OPERATOR_BINARY_IN), "RELATIONAL_IN"},
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{static_cast<int>(NODE_TYPE_OPERATOR_BINARY_NIN),
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"RELATIONAL_NOT_IN"},
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{static_cast<int>(NODE_TYPE_OPERATOR_BINARY_PLUS), "ARITHMETIC_PLUS"},
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{static_cast<int>(NODE_TYPE_OPERATOR_BINARY_MINUS),
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"ARITHMETIC_MINUS"},
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{static_cast<int>(NODE_TYPE_OPERATOR_BINARY_TIMES),
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"ARITHMETIC_TIMES"},
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{static_cast<int>(NODE_TYPE_OPERATOR_BINARY_DIV),
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"ARITHMETIC_DIVIDE"},
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{static_cast<int>(NODE_TYPE_OPERATOR_BINARY_MOD),
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"ARITHMETIC_MODULUS"},
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{static_cast<int>(NODE_TYPE_OPERATOR_BINARY_AND), "LOGICAL_AND"},
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{static_cast<int>(NODE_TYPE_OPERATOR_BINARY_OR), "LOGICAL_OR"},
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{static_cast<int>(NODE_TYPE_OPERATOR_TERNARY), "TERNARY_OPERATOR"},
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{static_cast<int>(NODE_TYPE_OPERATOR_BINARY_ARRAY_EQ),
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"RELATIONAL_ARRAY_EQUAL"},
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{static_cast<int>(NODE_TYPE_OPERATOR_BINARY_ARRAY_NE),
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"RELATIONAL_ARRAY_UNEQUAL"},
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{static_cast<int>(NODE_TYPE_OPERATOR_BINARY_ARRAY_GT),
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"RELATIONAL_ARRAY_GREATER"},
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{static_cast<int>(NODE_TYPE_OPERATOR_BINARY_ARRAY_GE),
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"RELATIONAL_ARRAY_GREATEREQUAL"},
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{static_cast<int>(NODE_TYPE_OPERATOR_BINARY_ARRAY_LT),
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"RELATIONAL_ARRAY_LESS"},
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{static_cast<int>(NODE_TYPE_OPERATOR_BINARY_ARRAY_LE),
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"RELATIONAL_ARRAY_LESSEQUAL"},
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{static_cast<int>(NODE_TYPE_OPERATOR_BINARY_ARRAY_IN),
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"RELATIONAL_ARRAY_IN"},
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{static_cast<int>(NODE_TYPE_OPERATOR_BINARY_ARRAY_NIN),
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"RELATIONAL_ARRAY_NOT_IN"}} {
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setOptional(false);
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startsAfter("EngineSelector");
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startsAfter("Aql");
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}
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// This feature does not have any options
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void AqlFunctionFeature::collectOptions(
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std::shared_ptr<options::ProgramOptions>) {}
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// This feature does not have any options
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void AqlFunctionFeature::validateOptions(
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std::shared_ptr<options::ProgramOptions>) {}
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void AqlFunctionFeature::prepare() {
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// set singleton
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AQLFUNCTIONS = this;
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/// @brief Add all AQL functions to the FunctionDefintions map
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addTypeCheckFunctions();
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addTypeCastFunctions();
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addStringFunctions();
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addNumericFunctions();
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addListFunctions();
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addDocumentFunctions();
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addGeoFunctions();
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addDateFunctions();
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addMiscFunctions();
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addStorageEngineFunctions();
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add({"PREGEL_RESULT", ".", false, true,
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true, true, &Functions::PregelResult, NotInCoordinator});
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}
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void AqlFunctionFeature::unprepare() {
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// Just unlink nothing more todo
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AQLFUNCTIONS = nullptr;
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}
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/// @brief returns a reference to a built-in function
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Function const* AqlFunctionFeature::getFunctionByName(std::string const& name) {
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TRI_ASSERT(AQLFUNCTIONS != nullptr);
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return AQLFUNCTIONS->byName(name);
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}
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void AqlFunctionFeature::add(Function const& func) {
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TRI_ASSERT(_functionNames.find(func.name) == _functionNames.end());
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// add function to the map
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_functionNames.emplace(func.name, func);
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}
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void AqlFunctionFeature::addAlias(std::string const& alias, std::string const& original) {
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auto it = _functionNames.find(original);
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TRI_ASSERT(it != _functionNames.end());
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// intentionally copy original function, as we want to give it another name
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Function aliasFunction = (*it).second;
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aliasFunction.name = alias;
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add(aliasFunction);
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}
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void AqlFunctionFeature::toVelocyPack(VPackBuilder& builder) {
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builder.openArray();
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for (auto const& it : _functionNames) {
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builder.openObject();
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builder.add("name", VPackValue(it.second.name));
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builder.add("arguments", VPackValue(it.second.arguments));
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builder.add("implementations", VPackValue(VPackValueType::Array));
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builder.add(VPackValue("js"));
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if (it.second.implementation != nullptr) {
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builder.add(VPackValue("cxx"));
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}
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builder.close(); // implementations
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builder.add("deterministic", VPackValue(it.second.isDeterministic));
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builder.add("cacheable", VPackValue(it.second.isCacheable()));
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builder.add("canThrow", VPackValue(it.second.canThrow));
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builder.close();
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}
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builder.close();
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}
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Function const* AqlFunctionFeature::byName(std::string const& name) {
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auto it = _functionNames.find(name);
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if (it == _functionNames.end()) {
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THROW_ARANGO_EXCEPTION_PARAMS(TRI_ERROR_QUERY_FUNCTION_NAME_UNKNOWN,
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name.c_str());
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}
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// return the address of the function
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return &((*it).second);
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}
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std::string const& AqlFunctionFeature::getOperatorName(
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AstNodeType const type, std::string const& errorMessage) {
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auto it = _internalFunctionNames.find(static_cast<int>(type));
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if (it == _internalFunctionNames.end()) {
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// no function found for the type of node
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THROW_ARANGO_EXCEPTION_MESSAGE(TRI_ERROR_INTERNAL, errorMessage);
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}
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return it->second;
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}
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// meanings of the symbols in the function arguments list
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// ------------------------------------------------------
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//
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// . = argument of any type (except collection)
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// c = collection name, will be converted into list with documents
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// h = collection name, will be converted into string
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// , = next argument
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// | = separates mandatory from optional arguments
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// + = unlimited number of optional arguments of any type
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void AqlFunctionFeature::addTypeCheckFunctions() {
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// type check functions
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add({"IS_NULL", ".", true, false, true, true,
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&Functions::IsNull});
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add({"IS_BOOL", ".", true, false, true, true,
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&Functions::IsBool});
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add({"IS_NUMBER", ".", true, false, true, true,
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&Functions::IsNumber});
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add({"IS_STRING", ".", true, false, true, true,
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&Functions::IsString});
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add({"IS_ARRAY", ".", true, false, true, true,
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&Functions::IsArray});
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// IS_LIST is an alias for IS_ARRAY
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addAlias("IS_LIST", "IS_ARRAY");
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add({"IS_OBJECT", ".", true, false, true, true,
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&Functions::IsObject});
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// IS_DOCUMENT is an alias for IS_OBJECT
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addAlias("IS_DOCUMENT", "IS_OBJECT");
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add({"IS_DATESTRING", ".", true, false, true,
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true});
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add({"TYPENAME", ".", true, false, true, true,
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&Functions::Typename});
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}
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void AqlFunctionFeature::addTypeCastFunctions() {
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// type cast functions
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add({"TO_NUMBER", ".", true, false, true, true, &Functions::ToNumber});
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add({"TO_STRING", ".", true, false, true, true, &Functions::ToString});
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add({"TO_BOOL", ".", true, false, true, true, &Functions::ToBool});
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add({"TO_ARRAY", ".", true, false, true, true, &Functions::ToArray});
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// TO_LIST is an alias for TO_ARRAY
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addAlias("TO_LIST", "TO_ARRAY");
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}
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void AqlFunctionFeature::addStringFunctions() {
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// string functions
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add({"CONCAT", ".|+", true, false, true, true, &Functions::Concat});
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add({"CONCAT_SEPARATOR", ".,.|+", true, false,
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true, true, &Functions::ConcatSeparator});
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add({"CHAR_LENGTH", ".", true, false, true, true, &Functions::CharLength});
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add({"LOWER", ".", true, false, true, true, &Functions::Lower});
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add({"UPPER", ".", true, false, true, true, &Functions::Upper});
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add({"SUBSTRING", ".,.|.", true, false, true, true, &Functions::Substring});
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add({"CONTAINS", ".,.|.", true, false, true, true, &Functions::Contains});
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add({"LIKE", ".,.|.", true, false, true, true, &Functions::Like});
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add({"REGEX_TEST", ".,.|.", true, false, true, true, &Functions::RegexTest});
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add({"REGEX_REPLACE", ".,.,.|.", true, false, true,
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true, &Functions::RegexReplace});
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add({"LEFT", ".,.", true, false, true, true, &Functions::Left});
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add({"RIGHT", ".,.", true, false, true, true, &Functions::Right});
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add({"TRIM", ".|.", true, false, true, true, &Functions::Trim});
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add({"LTRIM", ".|.", true, false, true, true});
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add({"RTRIM", ".|.", true, false, true, true});
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add({"FIND_FIRST", ".,.|.,.", true, false, true, true});
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add({"FIND_LAST", ".,.|.,.", true, false, true, true});
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add({"SPLIT", ".|.,.", true, false, true, true});
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add({"SUBSTITUTE", ".,.|.,.", true, false, true, true});
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add({"MD5", ".", true, false, true, true, &Functions::Md5});
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add({"SHA1", ".", true, false, true, true, &Functions::Sha1});
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add({"SHA512", ".", true, false, true, true, &Functions::Sha512});
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add({"HASH", ".", true, false, true, true, &Functions::Hash});
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add({"RANDOM_TOKEN", ".", false, true, true, true, &Functions::RandomToken});
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}
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void AqlFunctionFeature::addNumericFunctions() {
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// numeric functions
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add({"FLOOR", ".", true, false, true, true,
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&Functions::Floor});
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add({"CEIL", ".", true, false, true, true,
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&Functions::Ceil});
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add({"ROUND", ".", true, false, true, true,
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&Functions::Round});
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add({"ABS", ".", true, false, true, true, &Functions::Abs});
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add({"RAND", "", false, false, true, true,
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&Functions::Rand});
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add({"SQRT", ".", true, false, true, true,
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&Functions::Sqrt});
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add({"POW", ".,.", true, false, true, true,
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&Functions::Pow});
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add({"LOG", ".", true, false, true, true, &Functions::Log});
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add({"LOG2", ".", true, false, true, true,
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&Functions::Log2});
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add({"LOG10", ".", true, false, true, true,
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&Functions::Log10});
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add({"EXP", ".", true, false, true, true, &Functions::Exp});
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add({"EXP2", ".", true, false, true, true,
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&Functions::Exp2});
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add({"SIN", ".", true, false, true, true, &Functions::Sin});
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add({"COS", ".", true, false, true, true, &Functions::Cos});
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add({"TAN", ".", true, false, true, true, &Functions::Tan});
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add({"ASIN", ".", true, false, true, true,
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&Functions::Asin});
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add({"ACOS", ".", true, false, true, true,
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&Functions::Acos});
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add({"ATAN", ".", true, false, true, true,
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&Functions::Atan});
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add({"ATAN2", ".,.", true, false, true, true,
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&Functions::Atan2});
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add({"RADIANS", ".", true, false, true, true,
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&Functions::Radians});
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add({"DEGREES", ".", true, false, true, true,
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&Functions::Degrees});
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add({"PI", "", true, false, true, true, &Functions::Pi});
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}
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void AqlFunctionFeature::addListFunctions() {
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// list functions
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add({"RANGE", ".,.|.", true, false, true, true,
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&Functions::Range});
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add({"UNION", ".,.|+", true, false, true, true,
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&Functions::Union});
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add({"UNION_DISTINCT", ".,.|+", true, false, true,
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true, &Functions::UnionDistinct});
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add({"MINUS", ".,.|+", true, false, true, true,
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&Functions::Minus});
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add({"OUTERSECTION", ".,.|+", true, false, true,
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true, &Functions::Outersection});
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add({"INTERSECTION", ".,.|+", true, false, true,
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true, &Functions::Intersection});
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add({"FLATTEN", ".|.", true, false, true, true,
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&Functions::Flatten});
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add({"LENGTH", ".", true, false, true, true,
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&Functions::Length});
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addAlias("COUNT", "LENGTH");
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add({"MIN", ".", true, false, true, true, &Functions::Min});
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add({"MAX", ".", true, false, true, true, &Functions::Max});
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add({"SUM", ".", true, false, true, true, &Functions::Sum});
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add({"MEDIAN", ".", true, false, true, true,
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&Functions::Median});
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add({"PERCENTILE", ".,.|.", true, false, true, true,
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&Functions::Percentile});
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add({"AVERAGE", ".", true, false, true, true,
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&Functions::Average});
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addAlias("AVG", "AVERAGE");
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add({"VARIANCE_SAMPLE", ".", true, false, true,
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true, &Functions::VarianceSample});
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add({"VARIANCE_POPULATION", ".", true, false,
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true, true, &Functions::VariancePopulation});
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addAlias("VARIANCE", "VARIANCE_POPULATION");
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add({"STDDEV_SAMPLE", ".", true, false, true, true,
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&Functions::StdDevSample});
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add({"STDDEV_POPULATION", ".", true, false,
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true, true, &Functions::StdDevPopulation});
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addAlias("STDDEV", "STDDEV_POPULATION");
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add({"UNIQUE", ".", true, false, true, true,
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&Functions::Unique});
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add({"SORTED_UNIQUE", ".", true, false, true, true,
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&Functions::SortedUnique});
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add({"SLICE", ".,.|.", true, false, true, true,
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&Functions::Slice});
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add({"REVERSE", ".", true, false, true,
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true}); // note: REVERSE() can be applied on strings, too
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add({"FIRST", ".", true, false, true, true,
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&Functions::First});
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add({"LAST", ".", true, false, true, true,
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&Functions::Last});
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add({"NTH", ".,.", true, false, true, true,
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&Functions::Nth});
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add({"POSITION", ".,.|.", true, false, true, true,
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&Functions::Position});
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add({"CALL", ".|.+", false, true, false, true});
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add({"APPLY", ".|.", false, true, false, false});
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add({"PUSH", ".,.|.", true, false, true, false,
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&Functions::Push});
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add({"APPEND", ".,.|.", true, false, true, true,
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&Functions::Append});
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add({"POP", ".", true, false, true, true, &Functions::Pop});
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add({"SHIFT", ".", true, false, true, true,
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&Functions::Shift});
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add({"UNSHIFT", ".,.|.", true, false, true, true,
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&Functions::Unshift});
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add({"REMOVE_VALUE", ".,.|.", true, false, true,
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true, &Functions::RemoveValue});
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add({"REMOVE_VALUES", ".,.", true, false, true,
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true, &Functions::RemoveValues});
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add({"REMOVE_NTH", ".,.", true, false, true, true,
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&Functions::RemoveNth});
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}
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void AqlFunctionFeature::addDocumentFunctions() {
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// document functions
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add({"HAS", ".,.", true, false, true, true,
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&Functions::Has});
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add({"ATTRIBUTES", ".|.,.", true, false, true, true,
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&Functions::Attributes});
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add({"VALUES", ".|.", true, false, true, true,
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&Functions::Values});
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add({"MERGE", ".|+", true, false, true, true,
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&Functions::Merge});
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add({"MERGE_RECURSIVE", ".,.|+", true, false,
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true, true, &Functions::MergeRecursive});
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add({"DOCUMENT", "h.|.", false, true, false, true, &Functions::Document});
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add({"MATCHES", ".,.|.", true, false, true, true, &Functions::Matches});
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add({"UNSET", ".,.|+", true, false, true, true,
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&Functions::Unset});
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add({"UNSET_RECURSIVE", ".,.|+", true, false,
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true, true, &Functions::UnsetRecursive});
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add({"KEEP", ".,.|+", true, false, true, true,
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&Functions::Keep});
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add({"TRANSLATE", ".,.|.", true, false, true, true, &Functions::Translate});
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add({"ZIP", ".,.", true, false, true, true,
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&Functions::Zip});
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add({"JSON_STRINGIFY", ".", true, false, true,
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true, &Functions::JsonStringify});
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add({"JSON_PARSE", ".", true, false, true, true,
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&Functions::JsonParse});
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}
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void AqlFunctionFeature::addGeoFunctions() {
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// geo functions
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add({"DISTANCE", ".,.,.,.", true, false, true, true,
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&Functions::Distance});
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add({"WITHIN_RECTANGLE", "h.,.,.,.,.", false,
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true, false, true});
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add({"IS_IN_POLYGON", ".,.|.", true, false, true,
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true});
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}
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void AqlFunctionFeature::addDateFunctions() {
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// date functions
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add({"DATE_NOW", "", false, false, true, true});
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add({"DATE_TIMESTAMP", ".|.,.,.,.,.,.",
|
|
true, false, true, true});
|
|
add({"DATE_ISO8601", ".|.,.,.,.,.,.", true,
|
|
false, true, true});
|
|
add({"DATE_DAYOFWEEK", ".", true, false, true,
|
|
true});
|
|
add({"DATE_YEAR", ".", true, false, true, true});
|
|
add({"DATE_MONTH", ".", true, false, true, true});
|
|
add({"DATE_DAY", ".", true, false, true, true});
|
|
add({"DATE_HOUR", ".", true, false, true, true});
|
|
add({"DATE_MINUTE", ".", true, false, true, true});
|
|
add({"DATE_SECOND", ".", true, false, true, true});
|
|
add({"DATE_MILLISECOND", ".", true, false,
|
|
true, true});
|
|
add({"DATE_DAYOFYEAR", ".", true, false, true,
|
|
true});
|
|
add({"DATE_ISOWEEK", ".", true, false, true,
|
|
true});
|
|
add({"DATE_LEAPYEAR", ".", true, false, true,
|
|
true});
|
|
add({"DATE_QUARTER", ".", true, false, true,
|
|
true});
|
|
add({"DATE_DAYS_IN_MONTH", ".", true, false,
|
|
true, true});
|
|
add({"DATE_ADD", ".,.|.", true, false, true, true});
|
|
add({"DATE_SUBTRACT", ".,.|.", true, false, true,
|
|
true});
|
|
add({"DATE_DIFF", ".,.,.|.", true, false, true,
|
|
true});
|
|
add({"DATE_COMPARE", ".,.,.|.", true, false, true,
|
|
true});
|
|
add({"DATE_FORMAT", ".,.", true, false, true,
|
|
true});
|
|
}
|
|
|
|
void AqlFunctionFeature::addMiscFunctions() {
|
|
// misc functions
|
|
add({"FAIL", "|.", false, true, true, true});
|
|
add({"PASSTHRU", ".", false, false, true, true,
|
|
&Functions::Passthru});
|
|
addAlias("NOOPT", "PASSTHRU");
|
|
add({"V8", ".", true, false, true, true});
|
|
add({"TEST_INTERNAL", ".,.", false, false, true,
|
|
false});
|
|
add({"SLEEP", ".", false, true, true, true, &Functions::Sleep});
|
|
add({"COLLECTIONS", "", false, true, false, true, &Functions::Collections});
|
|
add({"NOT_NULL", ".|+", true, false, true, true,
|
|
&Functions::NotNull});
|
|
add({"FIRST_LIST", ".|+", true, false, true, true,
|
|
&Functions::FirstList});
|
|
add({"FIRST_DOCUMENT", ".|+", true, false, true,
|
|
true, &Functions::FirstDocument});
|
|
add({"PARSE_IDENTIFIER", ".", true, false, true,
|
|
true, &Functions::ParseIdentifier});
|
|
add({"IS_SAME_COLLECTION", ".h,.h", true,
|
|
false, true, true, &Functions::IsSameCollection});
|
|
add({"CURRENT_USER", "", false, false, false,
|
|
true});
|
|
add({"CURRENT_DATABASE", "", false, false,
|
|
false, true, &Functions::CurrentDatabase});
|
|
add({"COLLECTION_COUNT", ".h", false, true,
|
|
false, true, &Functions::CollectionCount});
|
|
}
|
|
|
|
void AqlFunctionFeature::addStorageEngineFunctions() {
|
|
StorageEngine* engine = EngineSelectorFeature::ENGINE;
|
|
TRI_ASSERT(engine != nullptr); // Engine not loaded. Startup broken
|
|
engine->addAqlFunctions();
|
|
}
|