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49 lines
1.0 KiB
C++
49 lines
1.0 KiB
C++
#pragma once
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#include <DB/IO/ReadBufferFromString.h>
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#include <DB/Interpreters/executeQuery.h>
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#include <DB/Interpreters/IInterpreter.h>
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#include <DB/Parsers/ASTQueryWithOutput.h>
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#include <DB/Parsers/ASTIdentifier.h>
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namespace DB
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{
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/** Вернуть список запросов, исполняющихся прямо сейчас.
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*/
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class InterpreterShowProcesslistQuery : public IInterpreter
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{
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public:
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InterpreterShowProcesslistQuery(ASTPtr query_ptr_, Context & context_)
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: query_ptr(query_ptr_), context(context_) {}
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BlockIO execute() override
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{
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return executeQuery(getRewrittenQuery(), context, true);
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}
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private:
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ASTPtr query_ptr;
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Context context;
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String getRewrittenQuery()
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{
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const ASTQueryWithOutput & query = dynamic_cast<const ASTQueryWithOutput &>(*query_ptr);
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std::stringstream rewritten_query;
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rewritten_query << "SELECT * FROM system.processes";
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if (query.format)
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rewritten_query << " FORMAT " << typeid_cast<const ASTIdentifier &>(*query.format).name;
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return rewritten_query.str();
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}
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};
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}
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