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146 lines
4.4 KiB
C++
146 lines
4.4 KiB
C++
#include <DB/Dictionaries/ExecutableDictionarySource.h>
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#include <DB/Common/ShellCommand.h>
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#include <DB/Interpreters/Context.h>
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#include <DB/Dictionaries/OwningBlockInputStream.h>
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#include <DB/DataStreams/IBlockOutputStream.h>
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#include <DB/DataTypes/DataTypesNumberFixed.h>
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namespace DB
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{
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static const size_t max_block_size = 8192;
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ExecutableDictionarySource::ExecutableDictionarySource(const DictionaryStructure & dict_struct_,
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const Poco::Util::AbstractConfiguration & config, const std::string & config_prefix,
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Block & sample_block, const Context & context) :
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dict_struct{dict_struct_},
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path{config.getString(config_prefix + ".path")},
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format{config.getString(config_prefix + ".format")},
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sample_block{sample_block},
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context(context)
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{
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}
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ExecutableDictionarySource::ExecutableDictionarySource(const ExecutableDictionarySource & other) :
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dict_struct{other.dict_struct},
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path{other.path},
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format{other.format},
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sample_block{other.sample_block},
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context(other.context)
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{
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}
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BlockInputStreamPtr ExecutableDictionarySource::loadAll()
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{
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LOG_TRACE(log, "loadAll " + toString());
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auto process = ShellCommand::execute(path);
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auto stream = context.getInputFormat(format, process->out, sample_block, max_block_size);
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return std::make_shared<OwningBlockInputStream<ShellCommand>>(stream, std::move(process));
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}
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void idsToBuffer(const Context & context, const std::string & format, Block & sample_block, WriteBuffer & out_buffer,
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const std::vector<UInt64> & ids)
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{
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ColumnWithTypeAndName column;
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column.type = std::make_shared<DataTypeUInt64>();
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column.column = column.type->createColumn();
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for (auto & id : ids)
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{
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column.column->insert(id); //CHECKME maybe faster?
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}
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Block block;
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block.insert(std::move(column));
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auto stream_out = context.getOutputFormat(format, out_buffer, sample_block);
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stream_out->writePrefix();
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stream_out->write(block);
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stream_out->writeSuffix();
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stream_out->flush();
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}
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void columnsToBuffer(const Context & context, const std::string & format, Block & sample_block, WriteBuffer & out_buffer, const DictionaryStructure & dict_struct,
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const ConstColumnPlainPtrs & key_columns, const std::vector<std::size_t> & requested_rows)
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{
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Block block;
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const auto keys_size = key_columns.size();
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for (const auto i : ext::range(0, keys_size))
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{
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const auto & key_description = (*dict_struct.key)[i];
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const auto & key = key_columns[i];
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ColumnWithTypeAndName column;
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column.type = key_description.type;
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column.column = key->clone(); // CHECKME !!
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block.insert(std::move(column));
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}
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auto stream_out = context.getOutputFormat(format, out_buffer, sample_block);
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stream_out->writePrefix();
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stream_out->write(block);
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stream_out->writeSuffix();
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stream_out->flush();
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}
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BlockInputStreamPtr ExecutableDictionarySource::loadIds(const std::vector<UInt64> & ids)
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{
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LOG_TRACE(log, "loadIds " + toString() + " ids=" + std::to_string(ids.size()));
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auto process = ShellCommand::execute(path);
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idsToBuffer(context, format, sample_block, process->in, ids);
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process->in.close();
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/*
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std::string process_err;
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readStringUntilEOF(process_err, process->err);
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std::cerr << "readed STDERR [" << process_err << "] " << std::endl;
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*/
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auto stream = context.getInputFormat(format, process->out, sample_block, max_block_size);
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return std::make_shared<OwningBlockInputStream<ShellCommand>>(stream, std::move(process));
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}
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BlockInputStreamPtr ExecutableDictionarySource::loadKeys(
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const ConstColumnPlainPtrs & key_columns, const std::vector<std::size_t> & requested_rows)
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{
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LOG_TRACE(log, "loadKeys " + toString() + " rows=" + std::to_string(requested_rows.size()));
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auto process = ShellCommand::execute(path);
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columnsToBuffer(context, format, sample_block, process->in, dict_struct, key_columns, requested_rows);
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process->in.close();
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/*
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std::string process_err;
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readStringUntilEOF(process_err, process->err);
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std::cerr << "readed STDERR [" << process_err << "] " << std::endl;
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*/
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auto stream = context.getInputFormat(format, process->out, sample_block, max_block_size);
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return std::make_shared<OwningBlockInputStream<ShellCommand>>(stream, std::move(process));
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}
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bool ExecutableDictionarySource::isModified() const
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{
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return true;
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}
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bool ExecutableDictionarySource::supportsSelectiveLoad() const
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{
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return true;
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}
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DictionarySourcePtr ExecutableDictionarySource::clone() const
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{
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return std::make_unique<ExecutableDictionarySource>(*this);
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}
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std::string ExecutableDictionarySource::toString() const
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{
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return "Executable: " + path;
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}
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}
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