Try to set max_threads to 1, but GlutenClickHouseTPCHColumnarShuffleP…

…arquetAQESuite::q1 and q2 will fail

cpp-ch/local-engine/Common/CHUtil.cpp

@@ -81,6 +81,7 @@ extern const ServerSettingsDouble primary_index_cache_size_ratio;
 namespace Setting
 {
 extern const SettingsBool query_plan_enable_optimizations;
+extern const SettingsMaxThreads max_threads;
 extern const SettingsUInt64 prefer_external_sort_block_bytes;
 extern const SettingsUInt64 max_bytes_before_external_sort;
 extern const SettingsDouble max_bytes_ratio_before_external_sort;
@@ -636,6 +637,9 @@ void BackendInitializerUtil::initSettings(const SparkConfigs::ConfigMap & spark_
     settings.set("input_format_parquet_enable_row_group_prefetch", false);
     settings.set("output_format_parquet_use_custom_encoder", false);
 
+    // TODO: we need set Setting::max_threads to 1 by default, but now we can't get correct metrics for the some query if we set it to 1.
+    //settings[Setting::max_threads] = 1;
+
     // TODO: set default to true when metrics could be collected while ch query plan optimization is enabled.
     settings[Setting::query_plan_enable_optimizations] = false;