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https://github.com/ClickHouse/ClickHouse.git
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495c6e03aa
* Replace all Context references with std::weak_ptr * Fix shared context captured by value * Fix build * Fix Context with named sessions * Fix copy context * Fix gcc build * Merge with master and fix build * Fix gcc-9 build
29 lines
561 B
C++
29 lines
561 B
C++
#pragma once
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#include <Interpreters/IInterpreter.h>
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#include <Parsers/IAST_fwd.h>
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namespace DB
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{
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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, WithContext
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{
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public:
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InterpreterExistsQuery(const ASTPtr & query_ptr_, ContextPtr context_) : WithContext(context_), query_ptr(query_ptr_) { }
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BlockIO execute() override;
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static Block getSampleBlock();
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private:
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ASTPtr query_ptr;
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BlockInputStreamPtr executeImpl();
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};
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}
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