[vectorized](pipeline) support union node operator (apache#15031)

be/src/exec/exec_node.h

@@ -222,6 +222,9 @@ class ExecNode {
     int64_t rows_returned() const { return _num_rows_returned; }
     int64_t limit() const { return _limit; }
     bool reached_limit() const { return _limit != -1 && _num_rows_returned >= _limit; }
+    /// Only use in vectorized exec engine to check whether reach limit and cut num row for block
+    // and add block rows for profile
+    void reached_limit(vectorized::Block* block, bool* eos);
     const std::vector<TupleId>& get_tuple_ids() const { return _tuple_ids; }
 
     RuntimeProfile* runtime_profile() const { return _runtime_profile.get(); }
@@ -259,10 +262,6 @@ class ExecNode {
     // 2. delete and release the column which create by function all and other reason
     void release_block_memory(vectorized::Block& block, uint16_t child_idx = 0);
 
-    /// Only use in vectorized exec engine to check whether reach limit and cut num row for block
-    // and add block rows for profile
-    void reached_limit(vectorized::Block* block, bool* eos);
-
     /// Only use in vectorized exec engine try to do projections to trans _row_desc -> _output_row_desc
     Status do_projections(vectorized::Block* origin_block, vectorized::Block* output_block);
 

be/src/pipeline/CMakeLists.txt

@@ -44,7 +44,6 @@ set(PIPELINE_FILES
         exec/analytic_source_operator.cpp
         exec/streaming_aggregation_source_operator.cpp
         exec/streaming_aggregation_sink_operator.cpp
-        exec/agg_context.cpp
         exec/sort_source_operator.cpp
         exec/sort_sink_operator.cpp
         exec/repeat_operator.cpp
@@ -54,6 +53,9 @@ set(PIPELINE_FILES
         exec/set_sink_operator.cpp
         exec/set_source_operator.cpp
         exec/set_probe_sink_operator.cpp
+        exec/union_sink_operator.cpp
+        exec/union_source_operator.cpp
+        exec/data_queue.cpp
         exec/select_operator.cpp)
 
 add_library(Pipeline STATIC

be/src/pipeline/exec/aggregation_sink_operator.h

@@ -17,7 +17,6 @@
 
 #pragma once
 
-#include "agg_context.h"
 #include "operator.h"
 
 namespace doris {