mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-12-15 10:52:30 +00:00
80 lines
2.4 KiB
C++
80 lines
2.4 KiB
C++
#include <Interpreters/ProcessList.h>
|
|
#include "PostgreSQLOutputFormat.h"
|
|
|
|
namespace DB
|
|
{
|
|
|
|
PostgreSQLOutputFormat::PostgreSQLOutputFormat(WriteBuffer & out_, const Block & header_, const FormatSettings & settings_)
|
|
: IOutputFormat(header_, out_)
|
|
, format_settings(settings_)
|
|
, message_transport(&out)
|
|
{
|
|
}
|
|
|
|
void PostgreSQLOutputFormat::doWritePrefix()
|
|
{
|
|
if (initialized)
|
|
return;
|
|
|
|
initialized = true;
|
|
const auto & header = getPort(PortKind::Main).getHeader();
|
|
data_types = header.getDataTypes();
|
|
|
|
if (header.columns())
|
|
{
|
|
std::vector<PostgreSQLProtocol::Messaging::FieldDescription> columns;
|
|
columns.reserve(header.columns());
|
|
|
|
for (size_t i = 0; i < header.columns(); i++)
|
|
{
|
|
const auto & column_name = header.getColumnsWithTypeAndName()[i].name;
|
|
columns.emplace_back(column_name, data_types[i]->getTypeId());
|
|
}
|
|
message_transport.send(PostgreSQLProtocol::Messaging::RowDescription(columns));
|
|
}
|
|
}
|
|
|
|
void PostgreSQLOutputFormat::consume(Chunk chunk)
|
|
{
|
|
doWritePrefix();
|
|
|
|
for (size_t i = 0; i != chunk.getNumRows(); ++i)
|
|
{
|
|
const Columns & columns = chunk.getColumns();
|
|
std::vector<std::shared_ptr<PostgreSQLProtocol::Messaging::ISerializable>> row;
|
|
row.reserve(chunk.getNumColumns());
|
|
|
|
for (size_t j = 0; j != chunk.getNumColumns(); ++j)
|
|
{
|
|
if (columns[j]->isNullAt(i))
|
|
row.push_back(std::make_shared<PostgreSQLProtocol::Messaging::NullField>());
|
|
else
|
|
{
|
|
WriteBufferFromOwnString ostr;
|
|
data_types[j]->serializeAsText(*columns[j], i, ostr, format_settings);
|
|
row.push_back(std::make_shared<PostgreSQLProtocol::Messaging::StringField>(std::move(ostr.str())));
|
|
}
|
|
}
|
|
|
|
message_transport.send(PostgreSQLProtocol::Messaging::DataRow(row));
|
|
}
|
|
}
|
|
|
|
void PostgreSQLOutputFormat::finalize() {}
|
|
|
|
void PostgreSQLOutputFormat::flush()
|
|
{
|
|
message_transport.flush();
|
|
}
|
|
|
|
void registerOutputFormatProcessorPostgreSQLWire(FormatFactory & factory)
|
|
{
|
|
factory.registerOutputFormatProcessor(
|
|
"PostgreSQLWire",
|
|
[](WriteBuffer & buf,
|
|
const Block & sample,
|
|
const RowOutputFormatParams &,
|
|
const FormatSettings & settings) { return std::make_shared<PostgreSQLOutputFormat>(buf, sample, settings); });
|
|
}
|
|
}
|