ClickHouse/dbms/src/Storages/System/StorageSystemProcesses.cpp

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#include <Columns/ColumnString.h>
#include <DataTypes/DataTypeString.h>
#include <DataTypes/DataTypesNumber.h>
#include <DataStreams/OneBlockInputStream.h>
#include <Interpreters/ProcessList.h>
#include <Storages/System/StorageSystemProcesses.h>
#include <Interpreters/Context.h>
namespace DB
{
StorageSystemProcesses::StorageSystemProcesses(const std::string & name_)
: name(name_)
{
columns = NamesAndTypesList{
{ "is_initial_query", std::make_shared<DataTypeUInt8>() },
{ "user", std::make_shared<DataTypeString>() },
{ "query_id", std::make_shared<DataTypeString>() },
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{ "address", std::make_shared<DataTypeString>() },
{ "port", std::make_shared<DataTypeUInt16>() },
{ "initial_user", std::make_shared<DataTypeString>() },
{ "initial_query_id", std::make_shared<DataTypeString>() },
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{ "initial_address", std::make_shared<DataTypeString>() },
{ "initial_port", std::make_shared<DataTypeUInt16>() },
{ "interface", std::make_shared<DataTypeUInt8>() },
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{ "os_user", std::make_shared<DataTypeString>() },
{ "client_hostname", std::make_shared<DataTypeString>() },
{ "client_name", std::make_shared<DataTypeString>() },
{ "client_version_major", std::make_shared<DataTypeUInt64>() },
{ "client_version_minor", std::make_shared<DataTypeUInt64>() },
{ "client_revision", std::make_shared<DataTypeUInt64>() },
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{ "http_method", std::make_shared<DataTypeUInt8>() },
{ "http_user_agent", std::make_shared<DataTypeString>() },
{ "quota_key", std::make_shared<DataTypeString>() },
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{ "elapsed", std::make_shared<DataTypeFloat64>() },
{ "is_cancelled", std::make_shared<DataTypeUInt8>() },
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{ "read_rows", std::make_shared<DataTypeUInt64>() },
{ "read_bytes", std::make_shared<DataTypeUInt64>() },
{ "total_rows_approx", std::make_shared<DataTypeUInt64>() },
{ "written_rows", std::make_shared<DataTypeUInt64>() },
{ "written_bytes", std::make_shared<DataTypeUInt64>() },
{ "memory_usage", std::make_shared<DataTypeInt64>() },
{ "query", std::make_shared<DataTypeString>() }
};
}
BlockInputStreams StorageSystemProcesses::read(
const Names & column_names,
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const SelectQueryInfo &,
const Context & context,
QueryProcessingStage::Enum & processed_stage,
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const size_t /*max_block_size*/,
const unsigned /*num_streams*/)
{
check(column_names);
processed_stage = QueryProcessingStage::FetchColumns;
ProcessList::Info info = context.getProcessList().getInfo();
MutableColumns res_columns = getSampleBlock().cloneEmptyColumns();
for (const auto & process : info)
{
size_t i = 0;
res_columns[i++]->insert(UInt64(process.client_info.query_kind == ClientInfo::QueryKind::INITIAL_QUERY));
res_columns[i++]->insert(process.client_info.current_user);
res_columns[i++]->insert(process.client_info.current_query_id);
res_columns[i++]->insert(process.client_info.current_address.host().toString());
res_columns[i++]->insert(UInt64(process.client_info.current_address.port()));
res_columns[i++]->insert(process.client_info.initial_user);
res_columns[i++]->insert(process.client_info.initial_query_id);
res_columns[i++]->insert(process.client_info.initial_address.host().toString());
res_columns[i++]->insert(UInt64(process.client_info.initial_address.port()));
res_columns[i++]->insert(UInt64(process.client_info.interface));
res_columns[i++]->insert(process.client_info.os_user);
res_columns[i++]->insert(process.client_info.client_hostname);
res_columns[i++]->insert(process.client_info.client_name);
res_columns[i++]->insert(process.client_info.client_version_major);
res_columns[i++]->insert(process.client_info.client_version_minor);
res_columns[i++]->insert(UInt64(process.client_info.client_revision));
res_columns[i++]->insert(UInt64(process.client_info.http_method));
res_columns[i++]->insert(process.client_info.http_user_agent);
res_columns[i++]->insert(process.client_info.quota_key);
res_columns[i++]->insert(process.elapsed_seconds);
res_columns[i++]->insert(UInt64(process.is_cancelled));
res_columns[i++]->insert(UInt64(process.read_rows));
res_columns[i++]->insert(UInt64(process.read_bytes));
res_columns[i++]->insert(UInt64(process.total_rows));
res_columns[i++]->insert(UInt64(process.written_rows));
res_columns[i++]->insert(UInt64(process.written_bytes));
res_columns[i++]->insert(process.memory_usage);
res_columns[i++]->insert(process.query);
}
return BlockInputStreams(1, std::make_shared<OneBlockInputStream>(getSampleBlock().cloneWithColumns(std::move(res_columns))));
}
}