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42 lines
1022 B
C++
42 lines
1022 B
C++
#pragma once
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#include <DB/Core/Block.h>
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#include <DB/DataStreams/IProfilingBlockInputStream.h>
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#include <DB/Dictionaries/ExternalResultDescription.h>
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#include <mysqlxx/Query.h>
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#include <mysqlxx/PoolWithFailover.h>
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#include <string>
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namespace DB
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{
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/// Allows processing results of a MySQL query as a sequence of Blocks, simplifies chaining
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class MySQLBlockInputStream final : public IProfilingBlockInputStream
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{
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public:
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MySQLBlockInputStream(
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const mysqlxx::PoolWithFailover::Entry & entry, const std::string & query_str, const Block & sample_block,
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const size_t max_block_size);
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String getName() const override { return "MySQL"; }
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String getID() const override;
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private:
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Block readImpl() override;
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static void insertDefaultValue(IColumn * const column, const IColumn & sample_column)
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{
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column->insertFrom(sample_column, 0);
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}
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mysqlxx::PoolWithFailover::Entry entry;
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mysqlxx::Query query;
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mysqlxx::UseQueryResult result;
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const size_t max_block_size;
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ExternalResultDescription description;
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};
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}
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