Add var_length_extend_max_depth option

src/binder/bind/bind_graph_pattern.cpp

@@ -322,10 +322,10 @@ std::shared_ptr<RelExpression> Binder::createRecursiveQueryRel(const parser::Rel
 std::pair<uint64_t, uint64_t> Binder::bindVariableLengthRelBound(
     const kuzu::parser::RelPattern& relPattern) {
     auto recursiveInfo = relPattern.getRecursiveInfo();
-    auto lowerBound = std::min(
-        TypeUtils::convertToUint32(recursiveInfo->lowerBound.c_str()), VAR_LENGTH_EXTEND_MAX_DEPTH);
-    auto upperBound = std::min(
-        TypeUtils::convertToUint32(recursiveInfo->upperBound.c_str()), VAR_LENGTH_EXTEND_MAX_DEPTH);
+    auto lowerBound = std::min(TypeUtils::convertToUint32(recursiveInfo->lowerBound.c_str()),
+        clientContext->varLengthExtendMaxDepth);
+    auto upperBound = std::min(TypeUtils::convertToUint32(recursiveInfo->upperBound.c_str()),
+        clientContext->varLengthExtendMaxDepth);
     if (lowerBound == 0 || upperBound == 0) {
         throw BinderException("Lower and upper bound of a rel must be greater than 0.");
     }

src/include/main/client_context.h

@@ -9,6 +9,11 @@
 #include "main/kuzu_fwd.h"
 
 namespace kuzu {
+
+namespace binder {
+class Binder;
+}
+
 namespace main {
 
 struct ActiveQuery {
@@ -25,10 +30,12 @@ struct ActiveQuery {
  */
 class ClientContext {
     friend class Connection;
+    friend class binder::Binder;
     friend class testing::TinySnbDDLTest;
     friend class testing::TinySnbCopyCSVTransactionTest;
     friend class ThreadsSetting;
     friend class TimeoutSetting;
+    friend class VarLengthExtendMaxDepthSetting;
 
 public:
     explicit ClientContext();
@@ -55,6 +62,7 @@ class ClientContext {
     uint64_t numThreadsForExecution;
     ActiveQuery activeQuery;
     uint64_t timeoutInMS;
+    uint32_t varLengthExtendMaxDepth;
 };
 
 } // namespace main

src/include/main/settings.h

@@ -31,5 +31,17 @@ struct TimeoutSetting {
     }
 };
 
+struct VarLengthExtendMaxDepthSetting {
+    static constexpr const char* name = "var_length_extend_max_depth";
+    static constexpr const common::LogicalTypeID inputType = common::LogicalTypeID::INT64;
+    static void setContext(ClientContext* context, const common::Value& parameter) {
+        assert(parameter.getDataType()->getLogicalTypeID() == common::LogicalTypeID::INT64);
+        context->varLengthExtendMaxDepth = parameter.getValue<int64_t>();
+    }
+    static std::string getSetting(ClientContext* context) {
+        return std::to_string(context->varLengthExtendMaxDepth);
+    }
+};
+
 } // namespace main
 } // namespace kuzu

src/main/client_context.cpp

@@ -19,7 +19,8 @@ void ActiveQuery::reset() {
 
 ClientContext::ClientContext()
     : numThreadsForExecution{std::thread::hardware_concurrency()},
-      timeoutInMS{ClientContextConstants::TIMEOUT_IN_MS} {}
+      timeoutInMS{ClientContextConstants::TIMEOUT_IN_MS}, varLengthExtendMaxDepth{
+                                                              VAR_LENGTH_EXTEND_MAX_DEPTH} {}
 
 void ClientContext::startTimingIfEnabled() {
     if (isTimeOutEnabled()) {

src/main/db_config.cpp

@@ -11,8 +11,8 @@ namespace main {
 #define GET_CONFIGURATION(_PARAM)                                                                  \
     { _PARAM::name, _PARAM::inputType, _PARAM::setContext, _PARAM::getSetting }
 
-static ConfigurationOption options[] = {
-    GET_CONFIGURATION(ThreadsSetting), GET_CONFIGURATION(TimeoutSetting)};
+static ConfigurationOption options[] = {GET_CONFIGURATION(ThreadsSetting),
+    GET_CONFIGURATION(TimeoutSetting), GET_CONFIGURATION(VarLengthExtendMaxDepthSetting)};
 
 ConfigurationOption* DBConfig::getOptionByName(const std::string& optionName) {
     auto lOptionName = optionName;

test/test_files/tinysnb/call/call.test

@@ -28,3 +28,13 @@
 -STATEMENT CALL current_setting('timeout') RETURN *
 ---- 1
 20000
+
+-LOG SetGetVarLengthMaxDepth
+-STATEMENT CALL var_length_extend_max_depth=10
+---- ok
+-STATEMENT CALL current_setting('var_length_extend_max_depth') RETURN *
+---- 1
+10
+-STATEMENT MATCH (a:person)-[:knows*1..28]->(b:person) RETURN COUNT(*);
+---- 1
+354290