Fix issue 1073

src/antlr4/Cypher.g4

@@ -14,9 +14,7 @@ grammar Cypher;
 }
 
 oC_Cypher
-    : SP ? oC_AnyCypherOption? SP? oC_Statement ( SP? ';' )? SP? EOF
-        | SP ? kU_DDL ( SP? ';' )? SP? EOF
-        | SP ? kU_CopyCSV ( SP? ';' )? SP? EOF ;
+    : SP ? oC_AnyCypherOption? SP? ( oC_Statement | kU_DDL | kU_CopyCSV ) ( SP? ';' )? SP? EOF ;
 
 kU_CopyCSV
     : COPY SP oC_SchemaName SP FROM SP StringLiteral ( SP? '(' SP? kU_ParsingOptions SP? ')' )? ;

src/include/main/connection.h

@@ -163,9 +163,6 @@ class Connection {
 
     unique_ptr<QueryResult> queryResultWithError(std::string& errMsg);
 
-    void setQuerySummaryAndPreparedStatement(
-        Statement* statement, Binder& binder, PreparedStatement* preparedStatement);
-
     std::unique_ptr<PreparedStatement> prepareNoLock(
         const std::string& query, bool enumerateAllPlans = false);
 

src/include/main/prepared_statement.h

@@ -22,16 +22,22 @@ class PreparedStatement {
     friend class kuzu::transaction::TinySnbCopyCSVTransactionTest;
 
 public:
+    inline bool allowActiveTransaction() const {
+        return !StatementTypeUtils::isDDLOrCopyCSV(statementType);
+    }
+
     inline bool isSuccess() const { return success; }
+
     inline string getErrorMessage() const { return errMsg; }
+
     inline bool isReadOnly() const { return readOnly; }
+
     inline expression_vector getExpressionsToCollect() {
         return statementResult->getExpressionsToCollect();
     }
 
 private:
     StatementType statementType;
-    bool allowActiveTransaction = false;
     bool success = true;
     bool readOnly = false;
     string errMsg;

src/include/parser/query/regular_query.h

@@ -26,20 +26,9 @@ class RegularQuery : public Statement {
 
     inline vector<bool> getIsUnionAll() const { return isUnionAll; }
 
-    inline void setEnableExplain(bool option) { enable_explain = option; }
-
-    inline bool isEnableExplain() const { return enable_explain; }
-
-    inline void setEnableProfile(bool option) { enable_profile = option; }
-
-    inline bool isEnableProfile() const { return enable_profile; }
-
 private:
     vector<unique_ptr<SingleQuery>> singleQueries;
     vector<bool> isUnionAll;
-    // If explain is enabled, we do not execute query but return physical plan only.
-    bool enable_explain = false;
-    bool enable_profile = false;
 };
 
 } // namespace parser

src/include/parser/statement.h

@@ -15,8 +15,17 @@ class Statement {
 
     inline StatementType getStatementType() const { return statementType; }
 
+    inline void enableExplain() { explain = true; }
+    inline bool isExplain() const { return explain; }
+
+    inline void enableProfile() { profile = true; }
+    inline bool isProfile() const { return profile; }
+
 private:
     StatementType statementType;
+    // If explain is enabled, we do not execute query but return physical plan only.
+    bool explain = false;
+    bool profile = false;
 };
 
 } // namespace parser

src/include/parser/transformer.h

@@ -16,8 +16,6 @@ class Transformer {
 public:
     explicit Transformer(CypherParser::OC_CypherContext& root) : root{root} {}
 
-    unique_ptr<RegularQuery> transformQuery();
-
     unique_ptr<Statement> transform();
 
 private:
@@ -200,7 +198,7 @@ class Transformer {
 
     string transformSymbolicName(CypherParser::OC_SymbolicNameContext& ctx);
 
-    unique_ptr<Statement> transformDDL();
+    unique_ptr<Statement> transformDDL(CypherParser::KU_DDLContext& ctx);
 
     unique_ptr<Statement> transformCreateNodeClause(CypherParser::KU_CreateNodeContext& ctx);
 
@@ -224,7 +222,7 @@ class Transformer {
 
     vector<string> transformNodeLabels(CypherParser::KU_NodeLabelsContext& ctx);
 
-    unique_ptr<Statement> transformCopyCSV();
+    unique_ptr<Statement> transformCopyCSV(CypherParser::KU_CopyCSVContext& ctx);
 
     unordered_map<string, unique_ptr<ParsedExpression>> transformParsingOptions(
         CypherParser::KU_ParsingOptionsContext& ctx);

src/include/processor/operator/copy_csv/copy_csv.h

@@ -19,24 +19,21 @@ class CopyCSV : public PhysicalOperator {
 
     inline bool isSource() const override { return true; }
 
-    virtual string execute(TaskScheduler* taskScheduler, ExecutionContext* executionContext) = 0;
+    string execute(TaskScheduler* taskScheduler, ExecutionContext* executionContext);
 
     bool getNextTuplesInternal() override {
         throw InternalException("getNextTupleInternal() should not be called on CopyCSV operator.");
     }
 
 protected:
-    void errorIfTableIsNonEmpty(TablesStatistics* tablesStatistics) {
-        auto numTuples = tablesStatistics->getReadOnlyVersion()
-                             ->tableStatisticPerTable.at(tableID)
-                             ->getNumTuples();
-        if (numTuples > 0) {
-            auto tableName = catalog->getReadOnlyVersion()->getTableSchema(tableID)->tableName;
-            throw CopyCSVException(
-                "COPY CSV commands can be executed only on completely empty tables. Table: " +
-                tableName + " has " + to_string(numTuples) + " many tuples.");
-        }
-    }
+    void errorIfTableIsNonEmpty();
+
+    std::string getOutputMsg(uint64_t numTuplesCopied);
+
+    virtual uint64_t executeInternal(
+        TaskScheduler* taskScheduler, ExecutionContext* executionContext) = 0;
+
+    virtual uint64_t getNumTuplesInTable() = 0;
 
 protected:
     Catalog* catalog;

src/include/processor/operator/copy_csv/copy_node_csv.h

@@ -9,20 +9,24 @@ namespace processor {
 class CopyNodeCSV : public CopyCSV {
 public:
     CopyNodeCSV(Catalog* catalog, CSVDescription csvDescription, table_id_t tableID, WAL* wal,
-        uint32_t id, const string& paramsString, NodesStore* nodesStore)
+        NodesStatisticsAndDeletedIDs* nodesStatistics, uint32_t id, const string& paramsString)
         : CopyCSV{PhysicalOperatorType::COPY_NODE_CSV, catalog, std::move(csvDescription), tableID,
               wal, id, paramsString},
-          nodesStore{nodesStore} {}
-
-    string execute(TaskScheduler* taskScheduler, ExecutionContext* executionContext) override;
+          nodesStatistics{nodesStatistics} {}
 
     unique_ptr<PhysicalOperator> clone() override {
         return make_unique<CopyNodeCSV>(
-            catalog, csvDescription, tableID, wal, id, paramsString, nodesStore);
+            catalog, csvDescription, tableID, wal, nodesStatistics, id, paramsString);
     }
 
+protected:
+    uint64_t executeInternal(
+        common::TaskScheduler* taskScheduler, ExecutionContext* executionContext) override;
+
+    uint64_t getNumTuplesInTable() override;
+
 private:
-    NodesStore* nodesStore;
+    NodesStatisticsAndDeletedIDs* nodesStatistics;
 };
 
 } // namespace processor

src/include/processor/operator/copy_csv/copy_rel_csv.h

@@ -9,22 +9,25 @@ namespace processor {
 class CopyRelCSV : public CopyCSV {
 public:
     CopyRelCSV(Catalog* catalog, CSVDescription csvDescription, table_id_t tableID, WAL* wal,
-        NodesStatisticsAndDeletedIDs* nodesStatisticsAndDeletedIDs, uint32_t id,
-        const string& paramsString, RelsStatistics* relsStatistics)
+        NodesStatisticsAndDeletedIDs* nodesStatistics, RelsStatistics* relsStatistics, uint32_t id,
+        const string& paramsString)
         : CopyCSV{PhysicalOperatorType::COPY_REL_CSV, catalog, std::move(csvDescription), tableID,
               wal, id, paramsString},
-          nodesStatisticsAndDeletedIDs{nodesStatisticsAndDeletedIDs}, relsStatistics{
-                                                                          relsStatistics} {}
-
-    string execute(TaskScheduler* taskScheduler, ExecutionContext* executionContext) override;
+          nodesStatistics{nodesStatistics}, relsStatistics{relsStatistics} {}
 
     unique_ptr<PhysicalOperator> clone() override {
-        return make_unique<CopyRelCSV>(catalog, csvDescription, tableID, wal,
-            nodesStatisticsAndDeletedIDs, id, paramsString, relsStatistics);
+        return make_unique<CopyRelCSV>(catalog, csvDescription, tableID, wal, nodesStatistics,
+            relsStatistics, id, paramsString);
     }
 
+protected:
+    uint64_t executeInternal(
+        TaskScheduler* taskScheduler, ExecutionContext* executionContext) override;
+
+    uint64_t getNumTuplesInTable() override;
+
 private:
-    NodesStatisticsAndDeletedIDs* nodesStatisticsAndDeletedIDs;
+    NodesStatisticsAndDeletedIDs* nodesStatistics;
     RelsStatistics* relsStatistics;
 };
 

src/main/connection.cpp

@@ -42,28 +42,6 @@ unique_ptr<QueryResult> Connection::queryResultWithError(std::string& errMsg) {
     return queryResult;
 }
 
-void Connection::setQuerySummaryAndPreparedStatement(
-    Statement* statement, Binder& binder, PreparedStatement* preparedStatement) {
-    switch (statement->getStatementType()) {
-    case StatementType::QUERY: {
-        auto parsedQuery = (RegularQuery*)statement;
-        preparedStatement->preparedSummary.isExplain = parsedQuery->isEnableExplain();
-        preparedStatement->preparedSummary.isProfile = parsedQuery->isEnableProfile();
-        preparedStatement->parameterMap = binder.getParameterMap();
-        preparedStatement->allowActiveTransaction = true;
-    } break;
-    case StatementType::COPY_CSV:
-    case StatementType::CREATE_REL_CLAUSE:
-    case StatementType::CREATE_NODE_CLAUSE:
-    case StatementType::DROP_PROPERTY:
-    case StatementType::DROP_TABLE: {
-        preparedStatement->allowActiveTransaction = false;
-    } break;
-    default:
-        assert(false);
-    }
-}
-
 std::unique_ptr<PreparedStatement> Connection::prepareNoLock(
     const string& query, bool enumerateAllPlans) {
     auto preparedStatement = make_unique<PreparedStatement>();
@@ -79,12 +57,14 @@ std::unique_ptr<PreparedStatement> Connection::prepareNoLock(
     try {
         // parsing
         auto statement = Parser::parseQuery(query);
+        preparedStatement->preparedSummary.isExplain = statement->isExplain();
+        preparedStatement->preparedSummary.isProfile = statement->isProfile();
         // binding
         auto binder = Binder(*database->catalog);
         auto boundStatement = binder.bind(*statement);
-        setQuerySummaryAndPreparedStatement(statement.get(), binder, preparedStatement.get());
         preparedStatement->statementType = boundStatement->getStatementType();
         preparedStatement->readOnly = boundStatement->isReadOnly();
+        preparedStatement->parameterMap = binder.getParameterMap();
         preparedStatement->statementResult = boundStatement->getStatementResult()->copy();
         // planning
         auto& nodeStatistics =
@@ -285,7 +265,7 @@ void Connection::beginTransactionIfAutoCommit(PreparedStatement* preparedStateme
     if (!preparedStatement->isReadOnly() && activeTransaction && activeTransaction->isReadOnly()) {
         throw ConnectionException("Can't execute a write query inside a read-only transaction.");
     }
-    if (!preparedStatement->allowActiveTransaction && activeTransaction) {
+    if (!preparedStatement->allowActiveTransaction() && activeTransaction) {
         throw ConnectionException(
             "DDL and CopyCSV statements are automatically wrapped in a "
             "transaction and committed. As such, they cannot be part of an "

src/parser/transformer.cpp

@@ -25,23 +25,24 @@ namespace kuzu {
 namespace parser {
 
 unique_ptr<Statement> Transformer::transform() {
+    unique_ptr<Statement> statement;
     if (root.oC_Statement()) {
-        return transformQuery();
+        statement = transformQuery(*root.oC_Statement()->oC_Query());
     } else if (root.kU_DDL()) {
-        return transformDDL();
+        statement = transformDDL(*root.kU_DDL());
     } else {
-        return transformCopyCSV();
+        statement = transformCopyCSV(*root.kU_CopyCSV());
     }
-}
-
-unique_ptr<RegularQuery> Transformer::transformQuery() {
-    auto regularQuery = transformQuery(*root.oC_Statement()->oC_Query());
     if (root.oC_AnyCypherOption()) {
         auto cypherOption = root.oC_AnyCypherOption();
-        regularQuery->setEnableExplain(cypherOption->oC_Explain() != nullptr);
-        regularQuery->setEnableProfile(cypherOption->oC_Profile() != nullptr);
+        if (cypherOption->oC_Explain()) {
+            statement->enableExplain();
+        }
+        if (cypherOption->oC_Profile()) {
+            statement->enableProfile();
+        }
     }
-    return regularQuery;
+    return statement;
 }
 
 unique_ptr<RegularQuery> Transformer::transformQuery(CypherParser::OC_QueryContext& ctx) {
@@ -872,9 +873,9 @@ string Transformer::transformSymbolicName(CypherParser::OC_SymbolicNameContext&
     }
 }
 
-unique_ptr<Statement> Transformer::transformDDL() {
-    if (root.kU_DDL()->kU_CreateNode()) {
-        return transformCreateNodeClause(*root.kU_DDL()->kU_CreateNode());
+unique_ptr<Statement> Transformer::transformDDL(CypherParser::KU_DDLContext& ctx) {
+    if (ctx.kU_CreateNode()) {
+        return transformCreateNodeClause(*ctx.kU_CreateNode());
     } else if (root.kU_DDL()->kU_CreateRel()) {
         return transformCreateRelClause(*root.kU_DDL()->kU_CreateRel());
     } else if (root.kU_DDL()->kU_DropTable()) {
@@ -972,8 +973,7 @@ vector<string> Transformer::transformNodeLabels(CypherParser::KU_NodeLabelsConte
     return nodeLabels;
 }
 
-unique_ptr<Statement> Transformer::transformCopyCSV() {
-    auto& ctx = *root.kU_CopyCSV();
+unique_ptr<Statement> Transformer::transformCopyCSV(CypherParser::KU_CopyCSVContext& ctx) {
     auto csvFileName = transformStringLiteral(*ctx.StringLiteral());
     auto tableName = transformSchemaName(*ctx.oC_SchemaName());
     auto parsingOptions = ctx.kU_ParsingOptions() ?

src/processor/mapper/map_ddl.cpp

@@ -44,16 +44,16 @@ unique_ptr<PhysicalOperator> PlanMapper::mapLogicalCopyCSVToPhysical(
     LogicalOperator* logicalOperator) {
     auto copyCSV = (LogicalCopyCSV*)logicalOperator;
     auto tableName = catalog->getReadOnlyVersion()->getTableName(copyCSV->getTableID());
+    auto nodesStatistics = &storageManager.getNodesStore().getNodesStatisticsAndDeletedIDs();
+    auto relsStatistics = &storageManager.getRelsStore().getRelsStatistics();
     if (catalog->getReadOnlyVersion()->containNodeTable(tableName)) {
         return make_unique<CopyNodeCSV>(catalog, copyCSV->getCSVDescription(),
-            copyCSV->getTableID(), storageManager.getWAL(), getOperatorID(),
-            copyCSV->getExpressionsForPrinting(), &storageManager.getNodesStore());
+            copyCSV->getTableID(), storageManager.getWAL(), nodesStatistics, getOperatorID(),
+            copyCSV->getExpressionsForPrinting());
     } else {
         return make_unique<CopyRelCSV>(catalog, copyCSV->getCSVDescription(), copyCSV->getTableID(),
-            storageManager.getWAL(),
-            &storageManager.getNodesStore().getNodesStatisticsAndDeletedIDs(), getOperatorID(),
-            copyCSV->getExpressionsForPrinting(),
-            &storageManager.getRelsStore().getRelsStatistics());
+            storageManager.getWAL(), nodesStatistics, relsStatistics, getOperatorID(),
+            copyCSV->getExpressionsForPrinting());
     }
 }
 

src/processor/operator/copy_csv/CMakeLists.txt

@@ -1,5 +1,6 @@
 add_library(kuzu_processor_operator_copy_csv
         OBJECT
+        copy_csv.cpp
         copy_node_csv.cpp
         copy_rel_csv.cpp)
 

src/processor/operator/copy_csv/copy_csv.cpp

@@ -0,0 +1,32 @@
+#include "processor/operator/copy_csv/copy_csv.h"
+
+namespace kuzu {
+namespace processor {
+
+string CopyCSV::execute(TaskScheduler* taskScheduler, ExecutionContext* executionContext) {
+    registerProfilingMetrics(executionContext->profiler);
+    metrics->executionTime.start();
+    errorIfTableIsNonEmpty();
+    auto numTuplesCopied = executeInternal(taskScheduler, executionContext);
+    metrics->executionTime.stop();
+    metrics->numOutputTuple.increase(numTuplesCopied);
+    return getOutputMsg(numTuplesCopied);
+}
+
+void CopyCSV::errorIfTableIsNonEmpty() {
+    auto numTuples = getNumTuplesInTable();
+    if (numTuples > 0) {
+        auto tableName = catalog->getReadOnlyVersion()->getTableSchema(tableID)->tableName;
+        throw CopyCSVException(
+            "COPY CSV commands can be executed only on completely empty tables. Table: " +
+            tableName + " has " + to_string(numTuples) + " many tuples.");
+    }
+}
+
+std::string CopyCSV::getOutputMsg(uint64_t numTuplesCopied) {
+    return StringUtils::string_format("%d number of tuples has been copied to table: %s.",
+        numTuplesCopied, catalog->getReadOnlyVersion()->getTableName(tableID).c_str());
+}
+
+} // namespace processor
+} // namespace kuzu