[fix](runtime filter) Disable build_bf_exactly if `sync_filter_size… (

apache#44169)

…` is disabled

When a bloom filter has multiple targets, it should use a size which is
estimated by FE.

be/src/exprs/runtime_filter.cpp

@@ -1337,18 +1337,19 @@ Status IRuntimeFilter::init_with_desc(const TRuntimeFilterDesc* desc, const TQue
     params.runtime_bloom_filter_min_size = options->__isset.runtime_bloom_filter_min_size
                                                    ? options->runtime_bloom_filter_min_size
                                                    : 0;
+    auto sync_filter_size = desc->__isset.sync_filter_size && desc->sync_filter_size;
     // We build runtime filter by exact distinct count iff three conditions are met:
     // 1. Only 1 join key
-    // 2. Do not have remote target (e.g. do not need to merge), or broadcast join
-    // 3. Bloom filter
+    // 2. Bloom filter
+    // 3. Size of all bloom filters will be same (size will be sync or this is a broadcast join).
     params.build_bf_exactly =
             build_bf_exactly && (_runtime_filter_type == RuntimeFilterType::BLOOM_FILTER ||
                                  _runtime_filter_type == RuntimeFilterType::IN_OR_BLOOM_FILTER);
 
     params.bloom_filter_size_calculated_by_ndv = desc->bloom_filter_size_calculated_by_ndv;
 
-    if (!desc->__isset.sync_filter_size || !desc->sync_filter_size) {
-        params.build_bf_exactly &= (!_has_remote_target || _is_broadcast_join);
+    if (!sync_filter_size) {
+        params.build_bf_exactly &= !_is_broadcast_join;
     }
 
     if (desc->__isset.bloom_filter_size_bytes) {