ClickHouse/dbms/src/Interpreters/InterpreterSetQuery.h

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#pragma once
#include <Interpreters/IInterpreter.h>
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namespace DB
{
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class Context;
class IAST;
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class ASTSetQuery;
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using ASTPtr = std::shared_ptr<IAST>;
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/** Change one or several settings, for session or globally, or just for current context.
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*/
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class InterpreterSetQuery : public IInterpreter
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{
public:
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InterpreterSetQuery(const ASTPtr & query_ptr_, Context & context_)
: query_ptr(query_ptr_), context(context_) {}
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/** Usual SET query. Set setting for session or globally (if GLOBAL was specified).
*/
BlockIO execute() override;
void checkAccess(const ASTSetQuery & ast);
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/** Set setting for current context (query context).
* It is used for interpretation of SETTINGS clause in SELECT query.
*/
void executeForCurrentContext();
private:
ASTPtr query_ptr;
Context & context;
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void executeImpl(const ASTSetQuery & ast, Context & target);
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};
}