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55 lines
1.4 KiB
C++
55 lines
1.4 KiB
C++
#pragma once
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#include <Core/Block.h>
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#include <DataStreams/IRowInputStream.h>
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namespace DB
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{
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class ReadBuffer;
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/** A stream to input data in tsv format.
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*/
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class TabSeparatedRowInputStream : public IRowInputStream
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{
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public:
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/** with_names - the first line is the header with the names of the columns
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* with_types - on the next line header with type names
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*/
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TabSeparatedRowInputStream(ReadBuffer & istr_, const Block & header_, bool with_names_ = false, bool with_types_ = false);
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bool read(MutableColumns & columns) override;
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void readPrefix() override;
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bool allowSyncAfterError() const override { return true; };
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void syncAfterError() override;
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std::string getDiagnosticInfo() override;
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private:
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ReadBuffer & istr;
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Block header;
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bool with_names;
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bool with_types;
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DataTypes data_types;
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/// For convenient diagnostics in case of an error.
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size_t row_num = 0;
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/// How many bytes were read, not counting those still in the buffer.
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size_t bytes_read_at_start_of_buffer_on_current_row = 0;
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size_t bytes_read_at_start_of_buffer_on_prev_row = 0;
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char * pos_of_current_row = nullptr;
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char * pos_of_prev_row = nullptr;
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void updateDiagnosticInfo();
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bool parseRowAndPrintDiagnosticInfo(MutableColumns & columns,
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WriteBuffer & out, size_t max_length_of_column_name, size_t max_length_of_data_type_name);
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};
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}
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