ClickHouse/dbms/include/DB/DataStreams/IRowInputStream.h

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#pragma once
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#include <boost/noncopyable.hpp>
#include <memory>
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#include <string>
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namespace DB
{
class Block;
Text formats allow to skip errors (#407) * Allow to skip errors in text formats: added settings 'input_format_allow_errors_num' and 'input_format_allow_errors_ratio' [#CLICKHOUSE-2778]. https://github.com/yandex/ClickHouse/issues/134 * Allow to skip errors in text formats: added settings 'input_format_allow_errors_num' and 'input_format_allow_errors_ratio' [#CLICKHOUSE-2778]. https://github.com/yandex/ClickHouse/issues/134 * Allow to skip errors in text formats: added settings 'input_format_allow_errors_num' and 'input_format_allow_errors_ratio' [#CLICKHOUSE-2778]. https://github.com/yandex/ClickHouse/issues/134 * Allow to skip errors in text formats: added settings 'input_format_allow_errors_num' and 'input_format_allow_errors_ratio' [#CLICKHOUSE-2778]. https://github.com/yandex/ClickHouse/issues/134 * Allow to skip errors in text formats: added settings 'input_format_allow_errors_num' and 'input_format_allow_errors_ratio' [#CLICKHOUSE-2778]. https://github.com/yandex/ClickHouse/issues/134 * Allow to skip errors in text formats: added settings 'input_format_allow_errors_num' and 'input_format_allow_errors_ratio' [#CLICKHOUSE-2778]. https://github.com/yandex/ClickHouse/issues/134 * Allow to skip errors in text formats: added settings 'input_format_allow_errors_num' and 'input_format_allow_errors_ratio' [#CLICKHOUSE-2778]. https://github.com/yandex/ClickHouse/issues/134 * Allow to skip errors in text formats: added settings 'input_format_allow_errors_num' and 'input_format_allow_errors_ratio' [#CLICKHOUSE-2778]. https://github.com/yandex/ClickHouse/issues/134 * Allow to skip errors in text formats: added settings 'input_format_allow_errors_num' and 'input_format_allow_errors_ratio' [#CLICKHOUSE-2778]. https://github.com/yandex/ClickHouse/issues/134 * Allow to skip errors in text formats: added settings 'input_format_allow_errors_num' and 'input_format_allow_errors_ratio' [#CLICKHOUSE-2778]. https://github.com/yandex/ClickHouse/issues/134 * Added test [#CLICKHOUSE-2778].
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/** Interface of stream, that allows to read data by rows.
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*/
class IRowInputStream : private boost::noncopyable
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{
public:
Text formats allow to skip errors (#407) * Allow to skip errors in text formats: added settings 'input_format_allow_errors_num' and 'input_format_allow_errors_ratio' [#CLICKHOUSE-2778]. https://github.com/yandex/ClickHouse/issues/134 * Allow to skip errors in text formats: added settings 'input_format_allow_errors_num' and 'input_format_allow_errors_ratio' [#CLICKHOUSE-2778]. https://github.com/yandex/ClickHouse/issues/134 * Allow to skip errors in text formats: added settings 'input_format_allow_errors_num' and 'input_format_allow_errors_ratio' [#CLICKHOUSE-2778]. https://github.com/yandex/ClickHouse/issues/134 * Allow to skip errors in text formats: added settings 'input_format_allow_errors_num' and 'input_format_allow_errors_ratio' [#CLICKHOUSE-2778]. https://github.com/yandex/ClickHouse/issues/134 * Allow to skip errors in text formats: added settings 'input_format_allow_errors_num' and 'input_format_allow_errors_ratio' [#CLICKHOUSE-2778]. https://github.com/yandex/ClickHouse/issues/134 * Allow to skip errors in text formats: added settings 'input_format_allow_errors_num' and 'input_format_allow_errors_ratio' [#CLICKHOUSE-2778]. https://github.com/yandex/ClickHouse/issues/134 * Allow to skip errors in text formats: added settings 'input_format_allow_errors_num' and 'input_format_allow_errors_ratio' [#CLICKHOUSE-2778]. https://github.com/yandex/ClickHouse/issues/134 * Allow to skip errors in text formats: added settings 'input_format_allow_errors_num' and 'input_format_allow_errors_ratio' [#CLICKHOUSE-2778]. https://github.com/yandex/ClickHouse/issues/134 * Allow to skip errors in text formats: added settings 'input_format_allow_errors_num' and 'input_format_allow_errors_ratio' [#CLICKHOUSE-2778]. https://github.com/yandex/ClickHouse/issues/134 * Allow to skip errors in text formats: added settings 'input_format_allow_errors_num' and 'input_format_allow_errors_ratio' [#CLICKHOUSE-2778]. https://github.com/yandex/ClickHouse/issues/134 * Added test [#CLICKHOUSE-2778].
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/** Read next row and append it to block.
* If no more rows - return false.
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*/
virtual bool read(Block & block) = 0;
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Text formats allow to skip errors (#407) * Allow to skip errors in text formats: added settings 'input_format_allow_errors_num' and 'input_format_allow_errors_ratio' [#CLICKHOUSE-2778]. https://github.com/yandex/ClickHouse/issues/134 * Allow to skip errors in text formats: added settings 'input_format_allow_errors_num' and 'input_format_allow_errors_ratio' [#CLICKHOUSE-2778]. https://github.com/yandex/ClickHouse/issues/134 * Allow to skip errors in text formats: added settings 'input_format_allow_errors_num' and 'input_format_allow_errors_ratio' [#CLICKHOUSE-2778]. https://github.com/yandex/ClickHouse/issues/134 * Allow to skip errors in text formats: added settings 'input_format_allow_errors_num' and 'input_format_allow_errors_ratio' [#CLICKHOUSE-2778]. https://github.com/yandex/ClickHouse/issues/134 * Allow to skip errors in text formats: added settings 'input_format_allow_errors_num' and 'input_format_allow_errors_ratio' [#CLICKHOUSE-2778]. https://github.com/yandex/ClickHouse/issues/134 * Allow to skip errors in text formats: added settings 'input_format_allow_errors_num' and 'input_format_allow_errors_ratio' [#CLICKHOUSE-2778]. https://github.com/yandex/ClickHouse/issues/134 * Allow to skip errors in text formats: added settings 'input_format_allow_errors_num' and 'input_format_allow_errors_ratio' [#CLICKHOUSE-2778]. https://github.com/yandex/ClickHouse/issues/134 * Allow to skip errors in text formats: added settings 'input_format_allow_errors_num' and 'input_format_allow_errors_ratio' [#CLICKHOUSE-2778]. https://github.com/yandex/ClickHouse/issues/134 * Allow to skip errors in text formats: added settings 'input_format_allow_errors_num' and 'input_format_allow_errors_ratio' [#CLICKHOUSE-2778]. https://github.com/yandex/ClickHouse/issues/134 * Allow to skip errors in text formats: added settings 'input_format_allow_errors_num' and 'input_format_allow_errors_ratio' [#CLICKHOUSE-2778]. https://github.com/yandex/ClickHouse/issues/134 * Added test [#CLICKHOUSE-2778].
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virtual void readPrefix() {}; /// delimiter before begin of result
virtual void readSuffix() {}; /// delimiter after end of result
/// Skip data until next row.
/// This is intended for text streams, that allow skipping of errors.
/// By default - throws not implemented exception.
virtual bool allowSyncAfterError() const { return false; }
virtual void syncAfterError();
/// In case of parse error, try to roll back and parse last one or two rows very carefully
/// and collect as much as possible diagnostic information about error.
/// If not implemented, returns empty string.
virtual std::string getDiagnosticInfo() { return {}; };
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virtual ~IRowInputStream() {}
};
using RowInputStreamPtr = std::shared_ptr<IRowInputStream>;
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}