diff --git a/libursa/OnDiskDataset.cpp b/libursa/OnDiskDataset.cpp
index fb41635..80e3210 100644
--- a/libursa/OnDiskDataset.cpp
+++ b/libursa/OnDiskDataset.cpp
@@ -8,6 +8,7 @@
 #include "DatabaseName.h"
 #include "Json.h"
 #include "Query.h"
+#include "spdlog/fmt/ostr.h"
 #include "spdlog/spdlog.h"
 
 void OnDiskDataset::save() {
@@ -91,6 +92,7 @@ void OnDiskDataset::execute(const Query &query, ResultWriter *out,
         types_to_query.emplace(ndx.index_type());
     }
     const Query plan = query.plan(types_to_query);
+    spdlog::debug("PLAN: {}", plan);
 
     QueryResult result = this->query(plan, counters);
     if (result.is_everything()) {
diff --git a/libursa/Query.cpp b/libursa/Query.cpp
index 5df7c8b..262df7d 100644
--- a/libursa/Query.cpp
+++ b/libursa/Query.cpp
@@ -43,11 +43,11 @@ std::ostream &operator<<(std::ostream &os, const Query &query) {
     if (type == QueryType::AND || type == QueryType::OR ||
         type == QueryType::MIN_OF) {
         if (type == QueryType::AND) {
-            os << "AND(";
+            os << "and(";
         } else if (type == QueryType::OR) {
-            os << "OR(";
+            os << "or(";
         } else if (type == QueryType::MIN_OF) {
-            os << "MIN_OF(" << query.as_count() << ", ";
+            os << "min_of(" << query.as_count() << ", ";
         }
 
         bool is_first = true;
@@ -81,7 +81,9 @@ std::string Query::as_string_repr() const {
     std::string out = "";
     if (value.empty()) {
         // Query is already after planning stage. Show low-level representation.
-        return fmt::format("{}:[{:06x}]", (int)ngram.itype, ngram.trigram);
+        // First digit is the index type and the rest is the raw trigram.
+        // Underscore was picked to make copying from terminal easier.
+        return fmt::format("{}_{:06x}", (int)ngram.itype, ngram.trigram);
     }
     // No query plan yet. Show stringlike representation.
     for (const auto &token : value) {
diff --git a/libursa/Version.h.in b/libursa/Version.h.in
index d8826cd..73203c2 100644
--- a/libursa/Version.h.in
+++ b/libursa/Version.h.in
@@ -9,4 +9,4 @@ constexpr std::string_view ursadb_format_version = "1.5.0";
 // Project version.
 // Consider updating the version tag when doing PRs.
 constexpr std::string_view ursadb_version_string =
-    "@PROJECT_VERSION@+primitives";
+    "@PROJECT_VERSION@+debuglogs";
diff --git a/src/NetworkService.cpp b/src/NetworkService.cpp
index 7b55dfe..a30626e 100644
--- a/src/NetworkService.cpp
+++ b/src/NetworkService.cpp
@@ -188,12 +188,17 @@ void NetworkService::poll_frontend() {
     s_send(&backend, request, ZMQTRACE);
 }
 
+void print_usage_and_exit() {
+    puts("Usage:");
+    puts("    ursadb database-file [bind-address]");
+    puts("       -v     Enable verbose output (debug messages)");
+    exit(1);
+}
+
 // Main entry point of the system!
 int main(int argc, char *argv[]) {
     if (argc < 2) {
-        printf("Usage:\n");
-        printf("    %s database-file [bind-address]\n", argv[0]);
-        return 1;
+        print_usage_and_exit();
     }
 
     spdlog::info("UrsaDB v{}", get_version_string());
@@ -202,15 +207,33 @@ int main(int argc, char *argv[]) {
     migrate_version(argv[1]);
 
     try {
-        Database db(argv[1]);
-        std::string bind_address = "tcp://127.0.0.1:9281";
+        bool enable_debug = false;
+        const char *db_file = NULL;
+        const char *bind_address = NULL;
+        for (int i = 1; i < argc; i++) {
+            if (std::string("-v") == argv[i]) {
+                enable_debug = true;
+            } else if (db_file == NULL) {
+                db_file = argv[i];  // first positional arg
+            } else if (bind_address == NULL) {
+                bind_address = argv[i];
+            } else {
+                spdlog::error("Too many positional arguments.");
+            }
+        }
+
+        if (db_file == NULL) {
+            print_usage_and_exit();
+        } else if (bind_address == NULL) {
+            bind_address = "tcp://127.0.0.1:9281";
+        }
 
-        if (argc > 3) {
-            spdlog::error("Too many command line arguments.");
-        } else if (argc == 3) {
-            bind_address = std::string(argv[2]);
+        if (enable_debug) {
+            spdlog::set_level(spdlog::level::debug);
+            spdlog::debug("Debug logging enabled");
         }
 
+        Database db(db_file);
         spdlog::info("BIND: {}", bind_address);
         NetworkService service(db, bind_address);
         service.run();