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54 lines
1.6 KiB
C++
54 lines
1.6 KiB
C++
#include <Columns/ColumnString.h>
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#include <Columns/ColumnsNumber.h>
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#include <DataTypes/DataTypeString.h>
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#include <DataTypes/DataTypesNumber.h>
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#include <DataStreams/OneBlockInputStream.h>
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#include <Interpreters/Context.h>
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#include <Storages/System/StorageSystemSettings.h>
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namespace DB
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{
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StorageSystemSettings::StorageSystemSettings(const std::string & name_)
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: name(name_)
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{
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setColumns(ColumnsDescription({
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{ "name", std::make_shared<DataTypeString>() },
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{ "value", std::make_shared<DataTypeString>() },
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{ "changed", std::make_shared<DataTypeUInt8>() },
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{ "description", std::make_shared<DataTypeString>() },
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}));
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}
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BlockInputStreams StorageSystemSettings::read(
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const Names & column_names,
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const SelectQueryInfo &,
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const Context & context,
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QueryProcessingStage::Enum & processed_stage,
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const size_t /*max_block_size*/,
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const unsigned /*num_streams*/)
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{
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check(column_names);
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processed_stage = QueryProcessingStage::FetchColumns;
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const Settings & settings = context.getSettingsRef();
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MutableColumns res_columns = getSampleBlock().cloneEmptyColumns();
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#define ADD_SETTING(TYPE, NAME, DEFAULT, DESCRIPTION) \
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res_columns[0]->insert(String(#NAME)); \
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res_columns[1]->insert(settings.NAME.toString()); \
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res_columns[2]->insert(UInt64(settings.NAME.changed)); \
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res_columns[3]->insert(String(DESCRIPTION));
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APPLY_FOR_SETTINGS(ADD_SETTING)
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#undef ADD_SETTING
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return BlockInputStreams(1, std::make_shared<OneBlockInputStream>(getSampleBlock().cloneWithColumns(std::move(res_columns))));
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}
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}
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