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#include <Processors/Transforms/CreatingSetsTransform.h>
#include <Processors/Executors/PushingPipelineExecutor.h>
#include <Processors/Sinks/SinkToStorage.h>
#include <Interpreters/Set.h>
#include <Interpreters/IJoin.h>
#include <Interpreters/Context.h>
#include <Storages/IStorage.h>
#include <Common/logger_useful.h>
#include <iomanip>
namespace DB
{
namespace ErrorCodes
{
extern const int LOGICAL_ERROR;
extern const int SET_SIZE_LIMIT_EXCEEDED;
}
CreatingSetsTransform::~CreatingSetsTransform() = default;
CreatingSetsTransform::CreatingSetsTransform(
Block in_header_,
Block out_header_,
SetAndKeyPtr set_and_key_,
StoragePtr external_table_,
SizeLimits network_transfer_limits_,
PreparedSetsCachePtr prepared_sets_cache_)
: IAccumulatingTransform(std::move(in_header_), std::move(out_header_))
, set_and_key(std::move(set_and_key_))
, external_table(std::move(external_table_))
, network_transfer_limits(std::move(network_transfer_limits_))
, prepared_sets_cache(std::move(prepared_sets_cache_))
{
}
void CreatingSetsTransform::work()
{
if (!is_initialized)
init();
if (done_with_set && done_with_table)
{
finishConsume();
input.close();
}
IAccumulatingTransform::work();
}
void CreatingSetsTransform::startSubquery()
{
/// Lookup the set in the cache if we don't need to build table.
if (prepared_sets_cache && !external_table)
{
/// Try to find the set in the cache and wait for it to be built.
/// Retry if the set from cache fails to be built.
while (true)
{
auto from_cache = prepared_sets_cache->findOrPromiseToBuild(set_and_key->key);
if (from_cache.index() == 0)
{
LOG_TRACE(log, "Building set, key: {}", set_and_key->key);
promise_to_build = std::move(std::get<0>(from_cache));
}
else
{
LOG_TRACE(log, "Waiting for set to be build by another thread, key: {}", set_and_key->key);
SharedSet set_built_by_another_thread = std::move(std::get<1>(from_cache));
const SetPtr & ready_set = set_built_by_another_thread.get();
if (!ready_set)
{
LOG_TRACE(log, "Failed to use set from cache, key: {}", set_and_key->key);
continue;
}
set_and_key->set = ready_set;
done_with_set = true;
set_from_cache = true;
}
break;
}
}
if (set_and_key->set && !set_from_cache)
LOG_TRACE(log, "Creating set, key: {}", set_and_key->key);
if (external_table)
LOG_TRACE(log, "Filling temporary table.");
if (external_table)
/// TODO: make via port
table_out = QueryPipeline(external_table->write({}, external_table->getInMemoryMetadataPtr(), nullptr, /*async_insert=*/false));
done_with_set = !set_and_key->set || set_from_cache;
done_with_table = !external_table;
if ((done_with_set && !set_from_cache) && done_with_table)
throw Exception(ErrorCodes::LOGICAL_ERROR, "Logical error: nothing to do with subquery");
if (table_out.initialized())
{
executor = std::make_unique<PushingPipelineExecutor>(table_out);
executor->start();
}
}
void CreatingSetsTransform::finishSubquery()
{
auto seconds = watch.elapsedNanoseconds() / 1e9;
if (set_from_cache)
{
LOG_DEBUG(log, "Got set from cache in {} sec.", seconds);
}
else if (read_rows != 0)
{
if (set_and_key->set)
LOG_DEBUG(log, "Created Set with {} entries from {} rows in {} sec.", set_and_key->set->getTotalRowCount(), read_rows, seconds);
if (external_table)
LOG_DEBUG(log, "Created Table with {} rows in {} sec.", read_rows, seconds);
}
else
{
LOG_DEBUG(log, "Subquery has empty result.");
}
}
void CreatingSetsTransform::init()
{
is_initialized = true;
watch.restart();
startSubquery();
}
void CreatingSetsTransform::consume(Chunk chunk)
{
read_rows += chunk.getNumRows();
auto block = getInputPort().getHeader().cloneWithColumns(chunk.detachColumns());
if (!done_with_set)
{
if (!set_and_key->set->insertFromBlock(block.getColumnsWithTypeAndName()))
done_with_set = true;
}
if (!done_with_table)
{
block = materializeBlock(block);
executor->push(block);
rows_to_transfer += block.rows();
bytes_to_transfer += block.bytes();
if (!network_transfer_limits.check(rows_to_transfer, bytes_to_transfer, "IN/JOIN external table",
ErrorCodes::SET_SIZE_LIMIT_EXCEEDED))
done_with_table = true;
}
if (done_with_set && done_with_table)
finishConsume();
}
Chunk CreatingSetsTransform::generate()
{
if (set_and_key->set && !set_from_cache)
{
set_and_key->set->finishInsert();
if (promise_to_build)
promise_to_build->set_value(set_and_key->set);
}
if (table_out.initialized())
{
executor->finish();
executor.reset();
table_out.reset();
}
finishSubquery();
return {};
}
}
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