Implicitly treat a file argument as --queries-file

programs/main.cpp

@@ -1,27 +1,22 @@
-#include <unistd.h>
-#include <fcntl.h>
+#include <base/phdr_cache.h>
+#include <Common/EnvironmentChecks.h>
+#include <Common/StringUtils.h>
+#include <Common/getHashOfLoadedBinary.h>
 
-#include <new>
-#include <iostream>
-#include <vector>
-#include <string>
-#include <string_view>
-#include <utility> /// pair
-
-#include <fmt/format.h>
+#if defined(SANITIZE_COVERAGE)
+#    include <Common/Coverage.h>
+#endif
 
 #include "config.h"
 #include "config_tools.h"
 
-#include <Common/EnvironmentChecks.h>
-#include <Common/Coverage.h>
-#include <Common/StringUtils.h>
-#include <Common/getHashOfLoadedBinary.h>
-#include <Common/IO.h>
-
-#include <base/phdr_cache.h>
-#include <base/coverage.h>
-
+#include <filesystem>
+#include <iostream>
+#include <new>
+#include <string>
+#include <string_view>
+#include <utility> /// pair
+#include <vector>
 
 /// Universal executable for various clickhouse applications
 int mainEntryClickHouseServer(int argc, char ** argv);
@@ -238,9 +233,12 @@ int main(int argc_, char ** argv_)
     ///     clickhouse # spawn local
     ///     clickhouse local # spawn local
     ///     clickhouse "select ..." # spawn local
+    ///     clickhouse /tmp/repro --enable-analyzer
     ///
-    if (main_func == printHelp && !argv.empty() && (argv.size() == 1 || argv[1][0] == '-'
-        || std::string_view(argv[1]).contains(' ')))
+    std::error_code ec;
+    if (main_func == printHelp && !argv.empty()
+        && (argv.size() == 1 || argv[1][0] == '-' || std::string_view(argv[1]).contains(' ')
+            || std::filesystem::exists(std::filesystem::path{argv[1]}, ec)))
     {
         main_func = mainEntryClickHouseLocal;
     }

src/Client/ClientBaseOptimizedParts.cpp

@@ -1,5 +1,7 @@
 #include <Client/ClientApplicationBase.h>
 
+#include <filesystem>
+
 namespace DB
 {
 
@@ -107,6 +109,7 @@ void ClientApplicationBase::parseAndCheckOptions(OptionsDescription & options_de
             && !op.original_tokens[0].empty() && !op.value.empty())
         {
             /// Two special cases for better usability:
+            /// - if the option is a filesystem file, then it's likely a queries file (clickhouse repro.sql)
             /// - if the option contains a whitespace, it might be a query: clickhouse "SELECT 1"
             /// These are relevant for interactive usage - user-friendly, but questionable in general.
             /// In case of ambiguity or for scripts, prefer using proper options.
@@ -115,7 +118,10 @@ void ClientApplicationBase::parseAndCheckOptions(OptionsDescription & options_de
             po::variable_value value(boost::any(op.value), false);
 
             const char * option;
-            if (token.contains(' '))
+            std::error_code ec;
+            if (std::filesystem::exists(std::filesystem::path{token}, ec))
+                option = "queries-file";
+            else if (token.contains(' '))
                 option = "query";
             else
                 throw Exception(ErrorCodes::BAD_ARGUMENTS, "Positional option `{}` is not supported.", token);

tests/queries/0_stateless/03267_positional_arguments_implicit_query_file.reference

@@ -0,0 +1,11 @@
+Hello from a file
+Hello from a file
+Hello from a file
+Hello from a file
+Hello from a file
+Hello from a file
+Hello from a file
+Hello from a file
+Hello from a file
+max_local_read_bandwidth	1	100
+max_local_read_bandwidth	1	200

tests/queries/0_stateless/03267_positional_arguments_implicit_query_file.sh

@@ -0,0 +1,34 @@
+# Tags: no-random-settings
+
+#!/usr/bin/env bash
+
+CUR_DIR=$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)
+# shellcheck source=../shell_config.sh
+. "$CUR_DIR"/../shell_config.sh
+
+FILE=${CLICKHOUSE_TMP}/${CLICKHOUSE_DATABASE}_without_extension
+echo "SELECT 'Hello from a file'" > ${FILE}
+
+# Queries can be read from a file.
+${CLICKHOUSE_BINARY} --queries-file ${FILE}
+
+# Or from stdin.
+${CLICKHOUSE_BINARY} < ${FILE}
+
+# Also the positional argument can be interpreted as a file.
+${CLICKHOUSE_BINARY} ${FILE}
+
+${CLICKHOUSE_LOCAL} --queries-file ${FILE}
+${CLICKHOUSE_LOCAL} < ${FILE}
+${CLICKHOUSE_LOCAL} ${FILE}
+
+${CLICKHOUSE_CLIENT} --queries-file ${FILE}
+${CLICKHOUSE_CLIENT} < ${FILE}
+${CLICKHOUSE_CLIENT} ${FILE}
+
+# Check that positional arguments work in any place
+echo "Select name, changed, value FROM system.settings where name = 'max_local_read_bandwidth'" > ${FILE}
+${CLICKHOUSE_BINARY} ${FILE} --max-local-read-bandwidth 100
+${CLICKHOUSE_BINARY} --max-local-read-bandwidth 200 ${FILE}
+
+rm ${FILE}