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https://github.com/ClickHouse/ClickHouse.git
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98 lines
3.1 KiB
C++
98 lines
3.1 KiB
C++
#include <Dictionaries/ExecutableDictionarySource.h>
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#include <Common/ShellCommand.h>
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#include <Interpreters/Context.h>
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#include <DataStreams/OwningBlockInputStream.h>
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#include <Dictionaries/DictionarySourceHelpers.h>
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#include <DataStreams/IBlockOutputStream.h>
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#include <DataTypes/DataTypesNumber.h>
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#include <common/logger_useful.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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: log(&Logger::get("ExecutableDictionarySource")),
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dict_struct{dict_struct_},
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command{config.getString(config_prefix + ".command")},
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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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: log(&Logger::get("ExecutableDictionarySource")),
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dict_struct{other.dict_struct},
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command{other.command},
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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(command);
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auto input_stream = context.getInputFormat(format, process->out, sample_block, max_block_size);
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return std::make_shared<OwningBlockInputStream<ShellCommand>>(input_stream, std::move(process));
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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() << " size = " << ids.size());
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auto process = ShellCommand::execute(command);
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auto output_stream = context.getOutputFormat(format, process->in, sample_block);
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formatIDs(output_stream, ids);
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process->in.close();
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auto input_stream = context.getInputFormat(format, process->out, sample_block, max_block_size);
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return std::make_shared<OwningBlockInputStream<ShellCommand>>(input_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() << " size = " << requested_rows.size());
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auto process = ShellCommand::execute(command);
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auto output_stream = context.getOutputFormat(format, process->in, sample_block);
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formatKeys(dict_struct, output_stream, key_columns);
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process->in.close();
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auto input_stream = context.getInputFormat(format, process->out, sample_block, max_block_size);
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return std::make_shared<OwningBlockInputStream<ShellCommand>>(input_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: " + command;
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}
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}
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