add current setting/version function

src/binder/bind/bind_reading_clause.cpp

@@ -63,7 +63,7 @@ std::unique_ptr<BoundReadingClause> Binder::bindInQueryCall(const ReadingClause&
         catalog.getBuiltInTableOperation()->mathTableOperation(callStatement.getFuncName());
     auto boundExpr = expressionBinder.bindLiteralExpression(*callStatement.getParameter());
     auto inputValue = reinterpret_cast<LiteralExpression*>(boundExpr.get())->getValue();
-    auto bindData = tableFunctionDefinition->bindFunc(
+    auto bindData = tableFunctionDefinition->bindFunc(clientContext,
         function::TableFuncBindInput{std::vector<common::Value>{*inputValue}},
         catalog.getReadOnlyVersion());
     expression_vector outputExpressions;

src/function/built_in_table_operations.cpp

@@ -8,6 +8,9 @@ namespace function {
 
 void BuiltInTableOperations::registerTableOperations() {
     tableOperations.insert({common::TABLE_INFO_FUNC_NAME, TableInfoOperation::getDefinitions()});
+    tableOperations.insert({common::DB_VERSION_FUNC_NAME, DBVersionOperation::getDefinitions()});
+    tableOperations.insert(
+        {common::CURRENT_SETTING_FUNC_NAME, CurrentSettingOperation::getDefinitions()});
 }
 
 TableOperationDefinition* BuiltInTableOperations::mathTableOperation(const std::string& name) {

src/function/table_operations.cpp

@@ -5,27 +5,6 @@
 namespace kuzu {
 namespace function {
 
-std::unique_ptr<TableInfoBindData> TableInfoOperation::bindFunc(
-    kuzu::function::TableFuncBindInput input, catalog::CatalogContent* catalog) {
-    std::vector<std::string> returnColumnNames;
-    std::vector<common::LogicalType> returnTypes;
-    auto tableName = input.inputs[0].getValue<std::string>();
-    auto tableID = catalog->getTableID(tableName);
-    auto schema = catalog->getTableSchema(tableID);
-    returnColumnNames.emplace_back("property id");
-    returnTypes.emplace_back(common::LogicalTypeID::INT64);
-    returnColumnNames.emplace_back("name");
-    returnTypes.emplace_back(common::LogicalTypeID::STRING);
-    returnColumnNames.emplace_back("type");
-    returnTypes.emplace_back(common::LogicalTypeID::STRING);
-    if (schema->isNodeTable) {
-        returnColumnNames.emplace_back("primary key");
-        returnTypes.emplace_back(common::LogicalTypeID::BOOL);
-    }
-    return std::make_unique<TableInfoBindData>(
-        schema, std::move(returnTypes), std::move(returnColumnNames), schema->getNumProperties());
-}
-
 void TableInfoOperation::tableFunc(std::pair<common::offset_t, common::offset_t> morsel,
     function::TableFuncBindData* bindData, std::vector<common::ValueVector*> outputVectors) {
     auto tableSchema = reinterpret_cast<function::TableInfoBindData*>(bindData)->tableSchema;
@@ -52,5 +31,66 @@ void TableInfoOperation::tableFunc(std::pair<common::offset_t, common::offset_t>
     }
 }
 
+std::unique_ptr<TableInfoBindData> TableInfoOperation::bindFunc(main::ClientContext* context,
+    kuzu::function::TableFuncBindInput input, catalog::CatalogContent* catalog) {
+    std::vector<std::string> returnColumnNames;
+    std::vector<common::LogicalType> returnTypes;
+    auto tableName = input.inputs[0].getValue<std::string>();
+    auto tableID = catalog->getTableID(tableName);
+    auto schema = catalog->getTableSchema(tableID);
+    returnColumnNames.emplace_back("property id");
+    returnTypes.emplace_back(common::LogicalTypeID::INT64);
+    returnColumnNames.emplace_back("name");
+    returnTypes.emplace_back(common::LogicalTypeID::STRING);
+    returnColumnNames.emplace_back("type");
+    returnTypes.emplace_back(common::LogicalTypeID::STRING);
+    if (schema->isNodeTable) {
+        returnColumnNames.emplace_back("primary key");
+        returnTypes.emplace_back(common::LogicalTypeID::BOOL);
+    }
+    return std::make_unique<TableInfoBindData>(
+        schema, std::move(returnTypes), std::move(returnColumnNames), schema->getNumProperties());
+}
+
+void DBVersionOperation::tableFunc(std::pair<common::offset_t, common::offset_t> morsel,
+    function::TableFuncBindData* bindData, std::vector<common::ValueVector*> outputVectors) {
+    auto outputVector = outputVectors[0];
+    auto pos = outputVector->state->selVector->selectedPositions[0];
+    outputVectors[0]->setValue(pos, std::string(common::KUZU_VERSION));
+    outputVectors[0]->setNull(pos, false);
+    outputVector->state->selVector->selectedSize = 1;
+}
+
+std::unique_ptr<TableFuncBindData> DBVersionOperation::bindFunc(main::ClientContext* context,
+    kuzu::function::TableFuncBindInput input, catalog::CatalogContent* catalog) {
+    std::vector<std::string> returnColumnNames;
+    std::vector<common::LogicalType> returnTypes;
+    returnColumnNames.emplace_back("KUZU_Version");
+    returnTypes.emplace_back(common::LogicalTypeID::STRING);
+    return std::make_unique<TableFuncBindData>(
+        std::move(returnTypes), std::move(returnColumnNames), 1 /* one row result */);
+}
+
+void CurrentSettingOperation::tableFunc(std::pair<common::offset_t, common::offset_t> morsel,
+    function::TableFuncBindData* bindData, std::vector<common::ValueVector*> outputVectors) {
+    auto currentSettingBindData = reinterpret_cast<CurrentSettingBindData*>(bindData);
+    auto outputVector = outputVectors[0];
+    auto pos = outputVector->state->selVector->selectedPositions[0];
+    outputVectors[0]->setValue(pos, currentSettingBindData->result);
+    outputVectors[0]->setNull(pos, false);
+    outputVector->state->selVector->selectedSize = 1;
+}
+
+std::unique_ptr<TableFuncBindData> CurrentSettingOperation::bindFunc(main::ClientContext* context,
+    kuzu::function::TableFuncBindInput input, catalog::CatalogContent* catalog) {
+    auto optionName = input.inputs[0].getValue<std::string>();
+    std::vector<std::string> returnColumnNames;
+    std::vector<common::LogicalType> returnTypes;
+    returnColumnNames.emplace_back(optionName);
+    returnTypes.emplace_back(common::LogicalTypeID::STRING);
+    return std::make_unique<CurrentSettingBindData>(context->getCurrentSetting(optionName),
+        std::move(returnTypes), std::move(returnColumnNames), 1 /* one row result */);
+}
+
 } // namespace function
 } // namespace kuzu

src/include/binder/binder.h

@@ -7,6 +7,10 @@
 #include "query_normalizer.h"
 
 namespace kuzu {
+namespace main {
+class ClientContext;
+}
+
 namespace binder {
 
 class BoundCreateNode;
@@ -53,9 +57,9 @@ class Binder {
     friend class ExpressionBinder;
 
 public:
-    explicit Binder(const catalog::Catalog& catalog)
+    explicit Binder(const catalog::Catalog& catalog, main::ClientContext* clientContext)
         : catalog{catalog}, lastExpressionId{0}, variableScope{std::make_unique<VariableScope>()},
-          expressionBinder{this} {}
+          expressionBinder{this}, clientContext{clientContext} {}
 
     std::unique_ptr<BoundStatement> bind(const parser::Statement& statement);
 
@@ -250,6 +254,7 @@ class Binder {
     uint32_t lastExpressionId;
     std::unique_ptr<VariableScope> variableScope;
     ExpressionBinder expressionBinder;
+    main::ClientContext* clientContext;
 };
 
 } // namespace binder

src/include/common/constants.h

@@ -7,6 +7,8 @@
 namespace kuzu {
 namespace common {
 
+constexpr char KUZU_VERSION[] = "v0.4.0";
+
 constexpr uint64_t DEFAULT_VECTOR_CAPACITY_LOG_2 = 11;
 constexpr uint64_t DEFAULT_VECTOR_CAPACITY = (uint64_t)1 << DEFAULT_VECTOR_CAPACITY_LOG_2;
 

src/include/common/expression_type.h

@@ -203,6 +203,8 @@ const std::string DECODE_FUNC_NAME = "DECODE";
 
 // TABLE functions
 const std::string TABLE_INFO_FUNC_NAME = "TABLE_INFO";
+const std::string DB_VERSION_FUNC_NAME = "DB_VERSION";
+const std::string CURRENT_SETTING_FUNC_NAME = "CURRENT_SETTING";
 
 enum ExpressionType : uint8_t {
 

src/include/function/table_operations.h

@@ -2,6 +2,7 @@
 
 #include "common/vector/value_vector.h"
 #include "function/function_definition.h"
+#include "main/client_context.h"
 
 namespace kuzu {
 
@@ -17,7 +18,7 @@ struct TableFuncBindInput;
 using table_func_t = std::function<void(std::pair<common::offset_t, common::offset_t>,
     function::TableFuncBindData*, std::vector<common::ValueVector*>)>;
 using table_bind_func_t = std::function<std::unique_ptr<TableFuncBindData>(
-    TableFuncBindInput input, catalog::CatalogContent* catalog)>;
+    main::ClientContext* context, TableFuncBindInput input, catalog::CatalogContent* catalog)>;
 
 struct TableFuncBindData {
     std::vector<common::LogicalType> returnTypes;
@@ -31,7 +32,9 @@ struct TableFuncBindData {
 
     virtual ~TableFuncBindData() = default;
 
-    virtual std::unique_ptr<TableFuncBindData> copy() = 0;
+    virtual std::unique_ptr<TableFuncBindData> copy() {
+        return std::make_unique<TableFuncBindData>(returnTypes, returnColumnNames, maxOffset);
+    }
 };
 
 struct TableFuncBindInput {
@@ -72,7 +75,45 @@ struct TableInfoOperation {
         function::TableFuncBindData* bindData, std::vector<common::ValueVector*> outputVectors);
 
     static std::unique_ptr<TableInfoBindData> bindFunc(
-        TableFuncBindInput input, catalog::CatalogContent* catalog);
+        main::ClientContext* context, TableFuncBindInput input, catalog::CatalogContent* catalog);
+};
+
+struct DBVersionOperation {
+    inline static std::unique_ptr<TableOperationDefinition> getDefinitions() {
+        return std::make_unique<TableOperationDefinition>("db_version", tableFunc, bindFunc);
+    }
+
+    static void tableFunc(std::pair<common::offset_t, common::offset_t> morsel,
+        function::TableFuncBindData* bindData, std::vector<common::ValueVector*> outputVectors);
+
+    static std::unique_ptr<TableFuncBindData> bindFunc(
+        main::ClientContext* context, TableFuncBindInput input, catalog::CatalogContent* catalog);
+};
+
+struct CurrentSettingBindData : public TableFuncBindData {
+    std::string result;
+
+    CurrentSettingBindData(std::string result, std::vector<common::LogicalType> returnTypes,
+        std::vector<std::string> returnColumnNames, common::offset_t maxOffset)
+        : result{std::move(result)}, TableFuncBindData{std::move(returnTypes),
+                                         std::move(returnColumnNames), maxOffset} {}
+
+    std::unique_ptr<TableFuncBindData> copy() override {
+        return std::make_unique<CurrentSettingBindData>(
+            result, returnTypes, returnColumnNames, maxOffset);
+    }
+};
+
+struct CurrentSettingOperation {
+    inline static std::unique_ptr<TableOperationDefinition> getDefinitions() {
+        return std::make_unique<TableOperationDefinition>("current_setting", tableFunc, bindFunc);
+    }
+
+    static void tableFunc(std::pair<common::offset_t, common::offset_t> morsel,
+        function::TableFuncBindData* bindData, std::vector<common::ValueVector*> outputVectors);
+
+    static std::unique_ptr<TableFuncBindData> bindFunc(
+        main::ClientContext* context, TableFuncBindInput input, catalog::CatalogContent* catalog);
 };
 
 } // namespace function

src/include/main/client_context.h

@@ -45,6 +45,8 @@ class ClientContext {
 
     void startTimingIfEnabled();
 
+    std::string getCurrentSetting(std::string optionName);
+
 private:
     uint64_t numThreadsForExecution;
     std::unique_ptr<ActiveQuery> activeQuery;

src/include/main/db_config.h

@@ -7,11 +7,13 @@ namespace kuzu {
 namespace main {
 
 typedef void (*set_context)(ClientContext* context, const common::Value& parameter);
+typedef std::string (*get_setting)(ClientContext* context);
 
 struct ConfigurationOption {
     const char* name;
     common::LogicalTypeID parameterType;
     set_context setContext;
+    get_setting getSetting;
 };
 
 class DBConfig {

src/include/main/settings.h

@@ -13,6 +13,9 @@ struct ThreadsSetting {
         assert(parameter.getDataType().getLogicalTypeID() == common::LogicalTypeID::INT64);
         context->numThreadsForExecution = parameter.getValue<int64_t>();
     }
+    static std::string getSetting(ClientContext* context) {
+        return std::to_string(context->numThreadsForExecution);
+    }
 };
 
 struct TimeoutSetting {
@@ -23,6 +26,9 @@ struct TimeoutSetting {
         context->timeoutInMS = parameter.getValue<int64_t>();
         context->startTimingIfEnabled();
     }
+    static std::string getSetting(ClientContext* context) {
+        return std::to_string(context->timeoutInMS);
+    }
 };
 
 } // namespace main

src/main/client_context.cpp

@@ -3,6 +3,7 @@
 #include <thread>
 
 #include "common/constants.h"
+#include "main/db_config.h"
 
 namespace kuzu {
 namespace main {
@@ -19,5 +20,13 @@ void ClientContext::startTimingIfEnabled() {
     }
 }
 
+std::string ClientContext::getCurrentSetting(std::string optionName) {
+    auto option = main::DBConfig::getOptionByName(optionName);
+    if (option == nullptr) {
+        throw common::RuntimeException{"Invalid option name: " + optionName + "."};
+    }
+    return option->getSetting(this);
+}
+
 } // namespace main
 } // namespace kuzu

src/main/connection.cpp

@@ -161,7 +161,7 @@ std::unique_ptr<PreparedStatement> Connection::prepareNoLock(
         // parsing
         auto statement = Parser::parseQuery(query);
         // binding
-        auto binder = Binder(*database->catalog);
+        auto binder = Binder(*database->catalog, clientContext.get());
         auto boundStatement = binder.bind(*statement);
         preparedStatement->preparedSummary.statementType = boundStatement->getStatementType();
         preparedStatement->readOnly =

src/main/db_config.cpp

@@ -7,7 +7,7 @@ namespace kuzu {
 namespace main {
 
 #define GET_CONFIGURATION(_PARAM)                                                                  \
-    { _PARAM::name, _PARAM::inputType, _PARAM::setContext, }
+    { _PARAM::name, _PARAM::inputType, _PARAM::setContext, _PARAM::getSetting }
 
 static ConfigurationOption options[] = {
     GET_CONFIGURATION(ThreadsSetting), GET_CONFIGURATION(TimeoutSetting)};

test/CMakeLists.txt

@@ -15,7 +15,6 @@ enable_testing()
 add_subdirectory(test_helper)
 add_subdirectory(test_runner)
 add_subdirectory(graph_test)
-add_subdirectory(binder)
 add_subdirectory(c_api)
 add_subdirectory(common)
 add_subdirectory(copy)

test/graph_test/graph_test.cpp

@@ -77,7 +77,7 @@ void BaseGraphTest::validateQueryBestPlanJoinOrder(
     auto catalog = getCatalog(*database);
     auto statement = parser::Parser::parseQuery(query);
     auto parsedQuery = (parser::RegularQuery*)statement.get();
-    auto boundQuery = Binder(*catalog).bind(*parsedQuery);
+    auto boundQuery = Binder(*catalog, conn->clientContext.get()).bind(*parsedQuery);
     auto plan = Planner::getBestPlan(*catalog,
         getStorageManager(*database)->getNodesStore().getNodesStatisticsAndDeletedIDs(),
         getStorageManager(*database)->getRelsStore().getRelsStatistics(), *boundQuery);

test/main/CMakeLists.txt

@@ -4,5 +4,4 @@ add_kuzu_test(main_test
         csv_output_test.cpp
         prepare_test.cpp
         result_value_test.cpp
-        storage_driver_test.cpp
-        call_test.cpp)
+        storage_driver_test.cpp)