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42 lines
1.0 KiB
C++
42 lines
1.0 KiB
C++
#pragma once
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#include <Parsers/IAST.h>
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namespace DB
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{
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/** Something like t.*
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* It will have qualifier as its child ASTIdentifier.
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* Optional transformers can be attached to further manipulate these expanded columns.
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*/
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class ASTQualifiedAsterisk : public IAST
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{
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public:
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String getID(char) const override { return "QualifiedAsterisk"; }
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ASTPtr clone() const override
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{
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auto clone = std::make_shared<ASTQualifiedAsterisk>(*this);
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clone->children.clear();
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if (transformers)
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{
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clone->transformers = transformers->clone();
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clone->children.push_back(clone->transformers);
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}
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clone->qualifier = qualifier->clone();
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clone->children.push_back(clone->qualifier);
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return clone;
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}
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void appendColumnName(WriteBuffer & ostr) const override;
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ASTPtr qualifier;
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ASTPtr transformers;
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protected:
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void formatImpl(const FormatSettings & settings, FormatState & state, FormatStateStacked frame) const override;
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};
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}
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