2017-04-01 09:19:00 +00:00
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#include <Common/Exception.h>
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2011-08-28 02:22:23 +00:00
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2017-04-01 09:19:00 +00:00
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#include <Columns/ColumnsNumber.h>
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#include <DataTypes/DataTypesNumber.h>
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#include <DataStreams/OneBlockInputStream.h>
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#include <Storages/System/StorageSystemOne.h>
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2011-08-28 02:22:23 +00:00
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namespace DB
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{
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StorageSystemOne::StorageSystemOne(const std::string & name_)
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2017-04-01 07:20:54 +00:00
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: name(name_), columns{{"dummy", std::make_shared<DataTypeUInt8>()}}
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2011-08-28 02:22:23 +00:00
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{
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}
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2012-01-09 19:20:48 +00:00
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BlockInputStreams StorageSystemOne::read(
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2017-04-01 07:20:54 +00:00
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const Names & column_names,
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2017-07-15 03:48:36 +00:00
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const SelectQueryInfo & query_info,
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2017-04-01 07:20:54 +00:00
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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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2017-06-02 15:54:39 +00:00
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const unsigned num_streams)
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2011-08-28 02:22:23 +00:00
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{
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2017-04-01 07:20:54 +00:00
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check(column_names);
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processed_stage = QueryProcessingStage::FetchColumns;
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2012-05-08 11:19:00 +00:00
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2017-04-01 07:20:54 +00:00
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Block block;
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ColumnWithTypeAndName col;
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col.name = "dummy";
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col.type = std::make_shared<DataTypeUInt8>();
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2017-07-21 06:35:58 +00:00
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col.column = DataTypeUInt8().createConstColumn(1, UInt64(0))->convertToFullColumnIfConst();
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2017-04-01 07:20:54 +00:00
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block.insert(std::move(col));
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2014-10-29 01:18:50 +00:00
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2017-04-01 07:20:54 +00:00
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return BlockInputStreams(1, std::make_shared<OneBlockInputStream>(block));
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2011-08-28 02:22:23 +00:00
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}
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}
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