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#include <Processors/QueryPlan/DistributedCreateLocalPlan.h>
#include "config_version.h"
#include <Common/checkStackSize.h>
#include <Core/ProtocolDefines.h>
#include <Interpreters/ActionsDAG.h>
#include <Interpreters/InterpreterSelectQuery.h>
#include <Interpreters/InterpreterSelectQueryAnalyzer.h>
#include <Processors/QueryPlan/ExpressionStep.h>
namespace DB
{
namespace
{
void addConvertingActions(QueryPlan & plan, const Block & header)
{
if (blocksHaveEqualStructure(plan.getCurrentDataStream().header, header))
return;
auto get_converting_dag = [](const Block & block_, const Block & header_)
{
/// Convert header structure to expected.
/// Also we ignore constants from result and replace it with constants from header.
/// It is needed for functions like `now64()` or `randConstant()` because their values may be different.
return ActionsDAG::makeConvertingActions(
block_.getColumnsWithTypeAndName(),
header_.getColumnsWithTypeAndName(),
ActionsDAG::MatchColumnsMode::Name,
true);
};
auto convert_actions_dag = get_converting_dag(plan.getCurrentDataStream().header, header);
auto converting = std::make_unique<ExpressionStep>(plan.getCurrentDataStream(), convert_actions_dag);
plan.addStep(std::move(converting));
}
}
std::unique_ptr<QueryPlan> createLocalPlan(
const ASTPtr & query_ast,
const Block & header,
ContextPtr context,
QueryProcessingStage::Enum processed_stage,
size_t shard_num,
size_t shard_count,
size_t replica_num,
size_t replica_count,
std::shared_ptr<ParallelReplicasReadingCoordinator> coordinator,
UUID group_uuid)
{
checkStackSize();
auto query_plan = std::make_unique<QueryPlan>();
auto new_context = Context::createCopy(context);
/// Do not push down limit to local plan, as it will break `rows_before_limit_at_least` counter.
if (processed_stage == QueryProcessingStage::WithMergeableStateAfterAggregationAndLimit)
processed_stage = QueryProcessingStage::WithMergeableStateAfterAggregation;
/// Do not apply AST optimizations, because query
/// is already optimized and some optimizations
/// can be applied only for non-distributed tables
/// and we can produce query, inconsistent with remote plans.
auto select_query_options = SelectQueryOptions(processed_stage)
.setShardInfo(static_cast<UInt32>(shard_num), static_cast<UInt32>(shard_count))
.ignoreASTOptimizations();
/// There are much things that are needed for coordination
/// during reading with parallel replicas
if (coordinator)
{
new_context->parallel_reading_coordinator = coordinator;
new_context->setClientInterface(ClientInfo::Interface::LOCAL);
new_context->setQueryKind(ClientInfo::QueryKind::SECONDARY_QUERY);
new_context->setReplicaInfo(true, replica_count, replica_num);
new_context->setConnectionClientVersion(VERSION_MAJOR, VERSION_MINOR, VERSION_PATCH, DBMS_TCP_PROTOCOL_VERSION);
new_context->setParallelReplicasGroupUUID(group_uuid);
new_context->setMergeTreeAllRangesCallback([coordinator](InitialAllRangesAnnouncement announcement)
{
coordinator->handleInitialAllRangesAnnouncement(announcement);
});
new_context->setMergeTreeReadTaskCallback([coordinator](ParallelReadRequest request) -> std::optional<ParallelReadResponse>
{
return coordinator->handleRequest(request);
});
}
if (context->getSettingsRef().allow_experimental_analyzer)
{
auto interpreter = InterpreterSelectQueryAnalyzer(query_ast, new_context, select_query_options);
query_plan = std::make_unique<QueryPlan>(std::move(interpreter).extractQueryPlan());
}
else
{
auto interpreter = InterpreterSelectQuery(query_ast, new_context, select_query_options);
interpreter.buildQueryPlan(*query_plan);
}
addConvertingActions(*query_plan, header);
return query_plan;
}
}
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