be/src/vec/exec/vexchange_node.cpp

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// to you under the Apache License, Version 2.0 (the
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//
//   http://www.apache.org/licenses/LICENSE-2.0
//
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#include "vec/exec/vexchange_node.h"

#include <gen_cpp/PlanNodes_types.h>
#include <glog/logging.h>

#include "common/object_pool.h"
#include "exec/rowid_fetcher.h"
#include "exec/tablet_info.h"
#include "runtime/exec_env.h"
#include "runtime/query_statistics.h"
#include "runtime/runtime_state.h"
#include "util/runtime_profile.h"
#include "vec/core/block.h"
#include "vec/core/column_with_type_and_name.h"
#include "vec/exprs/vexpr_context.h"
#include "vec/runtime/vdata_stream_mgr.h"
#include "vec/runtime/vdata_stream_recvr.h"

namespace doris::vectorized {
VExchangeNode::VExchangeNode(ObjectPool* pool, const TPlanNode& tnode, const DescriptorTbl& descs)
        : ExecNode(pool, tnode, descs),
          _num_senders(0),
          _is_merging(tnode.exchange_node.__isset.sort_info),
          _is_ready(false),
          _stream_recvr(nullptr),
          _input_row_desc(descs, tnode.exchange_node.input_row_tuples,
                          std::vector<bool>(tnode.nullable_tuples.begin(),
                                            tnode.nullable_tuples.begin() +
                                                    tnode.exchange_node.input_row_tuples.size())),
          _offset(tnode.exchange_node.__isset.offset ? tnode.exchange_node.offset : 0),
          _num_rows_skipped(0) {}

Status VExchangeNode::init(const TPlanNode& tnode, RuntimeState* state) {
    RETURN_IF_ERROR(ExecNode::init(tnode, state));
    if (!_is_merging) {
        return Status::OK();
    }
    RETURN_IF_ERROR(_vsort_exec_exprs.init(tnode.exchange_node.sort_info, _pool));
    _is_asc_order = tnode.exchange_node.sort_info.is_asc_order;
    _nulls_first = tnode.exchange_node.sort_info.nulls_first;

    return Status::OK();
}

Status VExchangeNode::prepare(RuntimeState* state) {
    RETURN_IF_ERROR(ExecNode::prepare(state));
    SCOPED_TIMER(_exec_timer);
    DCHECK_GT(_num_senders, 0);
    CHECK(state->exec_env() != nullptr);
    CHECK(state->exec_env()->vstream_mgr() != nullptr);
    _stream_recvr = state->exec_env()->vstream_mgr()->create_recvr(
            state, _input_row_desc, state->fragment_instance_id(), _id, _num_senders,
            _runtime_profile.get(), _is_merging);

    if (_is_merging) {
        RETURN_IF_ERROR(_vsort_exec_exprs.prepare(state, _row_descriptor, _row_descriptor));
    }
    return Status::OK();
}

Status VExchangeNode::alloc_resource(RuntimeState* state) {
    SCOPED_TIMER(_exec_timer);
    RETURN_IF_ERROR(ExecNode::alloc_resource(state));
    if (_is_merging) {
        RETURN_IF_ERROR(_vsort_exec_exprs.open(state));
        if (!state->enable_pipeline_exec()) {
            RETURN_IF_ERROR(_stream_recvr->create_merger(_vsort_exec_exprs.lhs_ordering_expr_ctxs(),
                                                         _is_asc_order, _nulls_first,
                                                         state->batch_size(), _limit, _offset));
        }
    }
    return Status::OK();
}

Status VExchangeNode::open(RuntimeState* state) {
    SCOPED_TIMER(_runtime_profile->total_time_counter());
    RETURN_IF_ERROR(ExecNode::open(state));

    return Status::OK();
}

Status VExchangeNode::get_next(RuntimeState* state, Block* block, bool* eos) {
    SCOPED_TIMER(_exec_timer);
    SCOPED_TIMER(runtime_profile()->total_time_counter());
    if (_is_merging && state->enable_pipeline_exec() && !_is_ready) {
        RETURN_IF_ERROR(_stream_recvr->create_merger(_vsort_exec_exprs.lhs_ordering_expr_ctxs(),
                                                     _is_asc_order, _nulls_first,
                                                     state->batch_size(), _limit, _offset));
        _is_ready = true;
        return Status::OK();
    }
    auto status = _stream_recvr->get_next(block, eos);
    RETURN_IF_ERROR(VExprContext::filter_block(_conjuncts, block, block->columns()));
    // In vsortrunmerger, it will set eos=true, and block not empty
    // so that eos==true, could not make sure that block not have valid data
    if (!*eos || block->rows() > 0) {
        if (!_is_merging) {
            if (_num_rows_skipped + block->rows() < _offset) {
                _num_rows_skipped += block->rows();
                block->set_num_rows(0);
            } else if (_num_rows_skipped < _offset) {
                auto offset = _offset - _num_rows_skipped;
                _num_rows_skipped = _offset;
                block->set_num_rows(block->rows() - offset);
            }
        }
        if (_num_rows_returned + block->rows() < _limit) {
            _num_rows_returned += block->rows();
        } else {
            *eos = true;
            auto limit = _limit - _num_rows_returned;
            block->set_num_rows(limit);
            _num_rows_returned = _limit;
        }
        COUNTER_SET(_rows_returned_counter, _num_rows_returned);
    }
    return status;
}

void VExchangeNode::release_resource(RuntimeState* state) {
    if (_stream_recvr != nullptr) {
        _stream_recvr->close();
    }
    if (_is_merging) {
        _vsort_exec_exprs.close(state);
    }
    ExecNode::release_resource(state);
}

Status VExchangeNode::close(RuntimeState* state) {
    if (is_closed()) {
        return Status::OK();
    }
    return ExecNode::close(state);
}

} // namespace doris::vectorized