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82 lines
2.9 KiB
C++
82 lines
2.9 KiB
C++
#include <Processors/QueryPlan/DistributedCreateLocalPlan.h>
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#include <Common/config_version.h>
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#include <Common/checkStackSize.h>
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#include <Core/ProtocolDefines.h>
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#include <Interpreters/ActionsDAG.h>
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#include <Interpreters/InterpreterSelectQuery.h>
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#include <Interpreters/InterpreterSelectQueryAnalyzer.h>
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#include <Processors/QueryPlan/ExpressionStep.h>
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namespace DB
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{
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namespace
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{
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void addConvertingActions(QueryPlan & plan, const Block & header)
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{
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if (blocksHaveEqualStructure(plan.getCurrentDataStream().header, header))
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return;
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auto get_converting_dag = [](const Block & block_, const Block & header_)
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{
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/// Convert header structure to expected.
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/// Also we ignore constants from result and replace it with constants from header.
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/// It is needed for functions like `now64()` or `randConstant()` because their values may be different.
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return ActionsDAG::makeConvertingActions(
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block_.getColumnsWithTypeAndName(),
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header_.getColumnsWithTypeAndName(),
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ActionsDAG::MatchColumnsMode::Name,
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true);
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};
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auto convert_actions_dag = get_converting_dag(plan.getCurrentDataStream().header, header);
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auto converting = std::make_unique<ExpressionStep>(plan.getCurrentDataStream(), convert_actions_dag);
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plan.addStep(std::move(converting));
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}
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}
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std::unique_ptr<QueryPlan> createLocalPlan(
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const ASTPtr & query_ast,
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const Block & header,
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ContextPtr context,
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QueryProcessingStage::Enum processed_stage,
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size_t shard_num,
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size_t shard_count)
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{
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checkStackSize();
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auto query_plan = std::make_unique<QueryPlan>();
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auto new_context = Context::createCopy(context);
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/// Do not push down limit to local plan, as it will break `rows_before_limit_at_least` counter.
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if (processed_stage == QueryProcessingStage::WithMergeableStateAfterAggregationAndLimit)
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processed_stage = QueryProcessingStage::WithMergeableStateAfterAggregation;
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/// Do not apply AST optimizations, because query
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/// is already optimized and some optimizations
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/// can be applied only for non-distributed tables
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/// and we can produce query, inconsistent with remote plans.
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auto select_query_options = SelectQueryOptions(processed_stage)
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.setShardInfo(static_cast<UInt32>(shard_num), static_cast<UInt32>(shard_count))
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.ignoreASTOptimizations();
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if (context->getSettingsRef().allow_experimental_analyzer)
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{
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auto interpreter = InterpreterSelectQueryAnalyzer(query_ast, new_context, select_query_options);
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query_plan = std::make_unique<QueryPlan>(std::move(interpreter).extractQueryPlan());
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}
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else
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{
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auto interpreter = InterpreterSelectQuery(query_ast, new_context, select_query_options);
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interpreter.buildQueryPlan(*query_plan);
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}
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addConvertingActions(*query_plan, header);
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return query_plan;
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}
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}
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