[GitHub] [incubator-doris] yangzhg commented on a change in pull request #3034: implements intersect node

[GitBox <gi...@apache.org>]

yangzhg commented on a change in pull request #3034: implements intersect node
URL: https://github.com/apache/incubator-doris/pull/3034#discussion_r388787920
 
 

 ##########
 File path: be/src/exec/intersect_node.cpp
 ##########
 @@ -56,4 +41,164 @@ Status IntersectNode::init(const TPlanNode& tnode, RuntimeState* state) {
     }
     return Status::OK();
 }
-}
\ No newline at end of file
+
+Status IntersectNode::prepare(RuntimeState* state) {
+    RETURN_IF_ERROR(ExecNode::prepare(state));
+    _build_pool.reset(new MemPool(mem_tracker()));
+    SCOPED_TIMER(_runtime_profile->total_time_counter());
+    for (size_t i = 0; i < _child_expr_lists.size(); ++i) {
+        RETURN_IF_ERROR(Expr::prepare(_child_expr_lists[i], state, child(i)->row_desc(),
+                                      expr_mem_tracker()));
+    }
+    _build_tuple_size = child(0)->row_desc().tuple_descriptors().size();
+    _build_tuple_row_size = _build_tuple_size * sizeof(Tuple*);
+    _build_tuple_idx.reserve(_build_tuple_size);
+
+    for (int i = 0; i < _build_tuple_size; ++i) {
+        TupleDescriptor* build_tuple_desc = child(0)->row_desc().tuple_descriptors()[i];
+        _build_tuple_idx.push_back(_row_descriptor.get_tuple_idx(build_tuple_desc->id()));
+    }
+    _find_nulls = std::vector<bool>(_child_expr_lists.size(), true);
+    return Status::OK();
+}
+
+Status IntersectNode::close(RuntimeState* state) {
+    if (is_closed()) {
+        return Status::OK();
+    }
+    for (auto& exprs : _child_expr_lists) {
+        Expr::close(exprs, state);
+    }
+
+    RETURN_IF_ERROR(exec_debug_action(TExecNodePhase::CLOSE));
+    // Must reset _probe_batch in close() to release resources
+    _probe_batch.reset(NULL);
+
+    if (_memory_used_counter != NULL && _hash_tbl.get() != NULL) {
+        COUNTER_UPDATE(_memory_used_counter, _build_pool->peak_allocated_bytes());
+        COUNTER_UPDATE(_memory_used_counter, _hash_tbl->byte_size());
+    }
+    if (_hash_tbl.get() != NULL) {
+        _hash_tbl->close();
+    }
+    if (_build_pool.get() != NULL) {
+        _build_pool->free_all();
+    }
+
+    return ExecNode::close(state);
+}
+
+Status IntersectNode::open(RuntimeState* state) {
+    RETURN_IF_ERROR(ExecNode::open(state));
+    RETURN_IF_ERROR(exec_debug_action(TExecNodePhase::OPEN));
+    SCOPED_TIMER(_runtime_profile->total_time_counter());
+    RETURN_IF_CANCELLED(state);
+    // open result expr lists.
+    for (const vector<ExprContext*>& exprs : _child_expr_lists) {
+        RETURN_IF_ERROR(Expr::open(exprs, state));
+    }
+
+    for (int i = 0; i < _children.size(); ++i) {
+        // initial build hash table
+        if (_hash_tbl.get() == nullptr || _hash_tbl->size() == 0) {
+            _hash_tbl.reset(new HashTable(_child_expr_lists[0], _child_expr_lists[i],
+                                          _build_tuple_size, false, _find_nulls, id(),
 
 Review comment:
   it means number of Tuples in the build tuple row  not table count

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