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31 lines
680 B
C++
31 lines
680 B
C++
#pragma once
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#include <Core/Names.h>
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#include <Parsers/IAST_fwd.h>
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namespace DB
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{
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class ASTQueryParameter;
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/// Visit substitutions in a query, replace ASTQueryParameter with ASTLiteral.
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/// Rebuild ASTIdentifiers if some parts are ASTQueryParameter.
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class ReplaceQueryParameterVisitor
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{
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public:
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ReplaceQueryParameterVisitor(const NameToNameMap & parameters)
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: query_parameters(parameters)
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{}
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void visit(ASTPtr & ast);
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private:
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const NameToNameMap & query_parameters;
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const String & getParamValue(const String & name);
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void visitIdentifier(ASTPtr & ast);
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void visitQueryParameter(ASTPtr & ast);
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void visitChildren(ASTPtr & ast);
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};
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}
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