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46 lines
1.2 KiB
C++
46 lines
1.2 KiB
C++
#pragma once
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#include <Parsers/ASTQueryWithOutput.h>
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#include <Parsers/SelectUnionMode.h>
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namespace DB
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{
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/** Single SELECT query or multiple SELECT queries with UNION
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* or UNION or UNION DISTINCT
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*/
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class ASTSelectWithUnionQuery : public ASTQueryWithOutput
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{
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public:
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String getID(char) const override { return "SelectWithUnionQuery"; }
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ASTPtr clone() const override;
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void formatQueryImpl(const FormatSettings & settings, FormatState & state, FormatStateStacked frame) const override;
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QueryKind getQueryKind() const override { return QueryKind::Select; }
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SelectUnionMode union_mode;
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SelectUnionModes list_of_modes;
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bool is_normalized = false;
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ASTPtr list_of_selects;
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SelectUnionModesSet set_of_modes;
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/// Consider any mode other than ALL as non-default.
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bool hasNonDefaultUnionMode() const;
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bool hasQueryParameters() const;
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private:
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/// This variable is optional as we want to set it on the first call to hasQueryParameters
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/// and return the same variable on future calls to hasQueryParameters
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/// its mutable as we set it in const function
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mutable std::optional<bool> has_query_parameters;
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};
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}
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