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72 lines
2.3 KiB
C++
72 lines
2.3 KiB
C++
#include <DataStreams/OneBlockInputStream.h>
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#include <Storages/System/StorageSystemDisks.h>
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#include <Processors/Sources/SourceFromSingleChunk.h>
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#include <Interpreters/Context.h>
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namespace DB
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{
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namespace ErrorCodes
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{
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}
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StorageSystemDisks::StorageSystemDisks(const std::string & name_)
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: IStorage({"system", name_})
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{
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StorageInMemoryMetadata storage_metadata;
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storage_metadata.setColumns(ColumnsDescription(
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{
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{"name", std::make_shared<DataTypeString>()},
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{"path", std::make_shared<DataTypeString>()},
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{"free_space", std::make_shared<DataTypeUInt64>()},
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{"total_space", std::make_shared<DataTypeUInt64>()},
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{"keep_free_space", std::make_shared<DataTypeUInt64>()},
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}));
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setInMemoryMetadata(storage_metadata);
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}
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Pipes StorageSystemDisks::read(
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const Names & column_names,
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const StorageMetadataPtr & metadata_snapshot,
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const SelectQueryInfo & /*query_info*/,
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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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metadata_snapshot->check(column_names, getVirtuals(), getStorageID());
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MutableColumnPtr col_name = ColumnString::create();
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MutableColumnPtr col_path = ColumnString::create();
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MutableColumnPtr col_free = ColumnUInt64::create();
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MutableColumnPtr col_total = ColumnUInt64::create();
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MutableColumnPtr col_keep = ColumnUInt64::create();
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for (const auto & [disk_name, disk_ptr] : context.getDisksMap())
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{
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col_name->insert(disk_name);
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col_path->insert(disk_ptr->getPath());
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col_free->insert(disk_ptr->getAvailableSpace());
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col_total->insert(disk_ptr->getTotalSpace());
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col_keep->insert(disk_ptr->getKeepingFreeSpace());
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}
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Columns res_columns;
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res_columns.emplace_back(std::move(col_name));
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res_columns.emplace_back(std::move(col_path));
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res_columns.emplace_back(std::move(col_free));
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res_columns.emplace_back(std::move(col_total));
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res_columns.emplace_back(std::move(col_keep));
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UInt64 num_rows = res_columns.at(0)->size();
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Chunk chunk(std::move(res_columns), num_rows);
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Pipes pipes;
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pipes.emplace_back(std::make_shared<SourceFromSingleChunk>(metadata_snapshot->getSampleBlock(), std::move(chunk)));
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return pipes;
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}
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}
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