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34 lines
614 B
C++
34 lines
614 B
C++
#pragma once
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#include <Interpreters/IInterpreter.h>
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namespace DB
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{
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class Context;
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class IAST;
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using ASTPtr = std::shared_ptr<IAST>;
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/** Check that table exists. Return single row with single column "result" of type UInt8 and value 0 or 1.
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*/
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class InterpreterExistsQuery : public IInterpreter
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{
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public:
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InterpreterExistsQuery(const ASTPtr & query_ptr_, const Context & context_)
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: query_ptr(query_ptr_), context(context_) {}
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BlockIO execute() override;
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private:
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ASTPtr query_ptr;
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const Context & context;
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Block getSampleBlock();
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BlockInputStreamPtr executeImpl();
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};
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}
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