ClickHouse/src/Dictionaries/DictionarySourceHelpers.h

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#pragma once
#include <vector>
#include <Columns/IColumn.h>
#include <common/types.h>
#include <Poco/File.h>
#include <Poco/Util/AbstractConfiguration.h>
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namespace DB
{
class IBlockOutputStream;
using BlockOutputStreamPtr = std::shared_ptr<IBlockOutputStream>;
struct DictionaryStructure;
class Context;
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/// Write keys to block output stream.
/// For simple key
void formatIDs(BlockOutputStreamPtr & out, const std::vector<UInt64> & ids);
/// For composite key
void formatKeys(
const DictionaryStructure & dict_struct,
BlockOutputStreamPtr & out,
const Columns & key_columns,
const std::vector<size_t> & requested_rows);
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/// Used for applying settings to copied context in some register[...]Source functions
Context copyContextAndApplySettings(
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const std::string & config_prefix,
const Context & context,
const Poco::Util::AbstractConfiguration & config);
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void applySettingsToContext(
const std::string & config_prefix,
Context & context,
const Poco::Util::AbstractConfiguration & config);
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}