zhiqiang-hhhh commented on code in PR #52701: URL: https://github.com/apache/doris/pull/52701#discussion_r2218195214
########## be/src/vec/exprs/virtual_slot_ref.cpp: ########## @@ -0,0 +1,208 @@ +// Licensed to the Apache Software Foundation (ASF) under one +// or more contributor license agreements. See the NOTICE file +// distributed with this work for additional information +// regarding copyright ownership. The ASF licenses this file +// to you under the Apache License, Version 2.0 (the +// "License"); you may not use this file except in compliance +// with the License. You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, +// software distributed under the License is distributed on an +// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY +// KIND, either express or implied. See the License for the +// specific language governing permissions and limitations +// under the License. + +#include "vec/exprs/virtual_slot_ref.h" + +#include <gen_cpp/Exprs_types.h> +#include <glog/logging.h> +#include <thrift/protocol/TDebugProtocol.h> + +#include <ostream> + +#include "common/exception.h" +#include "common/logging.h" +#include "common/status.h" +#include "runtime/descriptors.h" +#include "runtime/runtime_state.h" +#include "vec/columns/column.h" +#include "vec/columns/column_nothing.h" +#include "vec/core/block.h" +#include "vec/core/column_with_type_and_name.h" +#include "vec/exprs/vectorized_fn_call.h" +#include "vec/exprs/vexpr_context.h" +#include "vec/exprs/vexpr_fwd.h" + +namespace doris::vectorized { + +VirtualSlotRef::VirtualSlotRef(const doris::TExprNode& node) + : VExpr(node), + _column_id(-1), + _slot_id(node.slot_ref.slot_id), + _column_name(nullptr), + _column_label(node.label) {} + +VirtualSlotRef::VirtualSlotRef(const SlotDescriptor* desc) + : VExpr(desc->type(), false), _column_id(-1), _slot_id(desc->id()), _column_name(nullptr) {} + +Status VirtualSlotRef::prepare(doris::RuntimeState* state, const doris::RowDescriptor& desc, + VExprContext* context) { + RETURN_IF_ERROR_OR_PREPARED(VExpr::prepare(state, desc, context)); + DCHECK_EQ(_children.size(), 0); + if (_slot_id == -1) { + _prepare_finished = true; + return Status::OK(); + } + + const SlotDescriptor* slot_desc = state->desc_tbl().get_slot_descriptor(_slot_id); + if (slot_desc == nullptr) { + return Status::Error<ErrorCode::INTERNAL_ERROR>( + "couldn't resolve slot descriptor {}, desc: {}", _slot_id, + state->desc_tbl().debug_string()); + } + + if (slot_desc->get_virtual_column_expr() == nullptr) { + return Status::InternalError( + "VirtualSlotRef {} has no virtual column expr, slot_id: {}, desc: {}, " + "slot_desc: {}, desc_tbl: {}", + *_column_name, _slot_id, desc.debug_string(), slot_desc->debug_string(), + state->desc_tbl().debug_string()); + } + + _column_name = &slot_desc->col_name(); + _column_data_type = slot_desc->get_data_type_ptr(); + DCHECK(_column_data_type != nullptr); + if (!context->force_materialize_slot() && !slot_desc->is_materialized()) { + // slot should be ignored manually + _column_id = -1; + _prepare_finished = true; + return Status::OK(); + } + + _column_id = desc.get_column_id(_slot_id, context->force_materialize_slot()); + if (_column_id < 0) { + return Status::Error<ErrorCode::INTERNAL_ERROR>( + "VirtualSlotRef {} has invalid slot id: " + "{}.\nslot_desc:\n{},\ndesc:\n{},\ndesc_tbl:\n{}", + *_column_name, _slot_id, slot_desc->debug_string(), desc.debug_string(), + state->desc_tbl().debug_string()); + } + const TExpr& expr = *slot_desc->get_virtual_column_expr(); + // LOG_INFO("Virtual column expr is {}", apache::thrift::ThriftDebugString(expr)); + // Create a temp_ctx only for create_expr_tree. + VExprContextSPtr temp_ctx; + RETURN_IF_ERROR(VExpr::create_expr_tree(expr, temp_ctx)); + _virtual_column_expr = temp_ctx->root(); + // Virtual column expr should do prepare with original context. + RETURN_IF_ERROR(_virtual_column_expr->prepare(state, desc, context)); + _prepare_finished = true; + return Status::OK(); +} + +Status VirtualSlotRef::open(RuntimeState* state, VExprContext* context, + FunctionContext::FunctionStateScope scope) { + DCHECK(_prepare_finished); + RETURN_IF_ERROR(_virtual_column_expr->open(state, context, scope)); + RETURN_IF_ERROR(VExpr::open(state, context, scope)); + _open_finished = true; + return Status::OK(); +} + +Status VirtualSlotRef::execute(VExprContext* context, Block* block, int* result_column_id) { + if (_column_id >= 0 && _column_id >= block->columns()) { Review Comment: > vslot没有children吗？那如果expr顺序被打乱了是否可能会有问题 没有child。`expr顺序打乱`是什么？ -- This is an automated message from the Apache Git Service. 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