2011-09-26 01:50:32 +00:00
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#pragma once
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2010-06-24 19:12:10 +00:00
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2017-04-01 09:19:00 +00:00
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#include <Core/Field.h>
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2017-11-24 13:55:31 +00:00
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#include <Common/FieldVisitors.h>
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2017-04-01 09:19:00 +00:00
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#include <Parsers/ASTWithAlias.h>
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2010-06-24 19:12:10 +00:00
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namespace DB
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{
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2017-05-27 17:27:16 +00:00
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/** Literal (atomic) - number, string, NULL
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2010-06-24 19:12:10 +00:00
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*/
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2014-07-03 22:39:13 +00:00
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class ASTLiteral : public ASTWithAlias
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2010-06-24 19:12:10 +00:00
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{
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public:
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2017-04-01 07:20:54 +00:00
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Field value;
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2010-06-24 19:12:10 +00:00
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2018-02-26 03:37:08 +00:00
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ASTLiteral(const Field & value_) : value(value_) {}
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2011-09-25 03:37:09 +00:00
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2017-05-27 17:27:16 +00:00
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/** Get the text that identifies this element. */
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2018-12-07 12:34:40 +00:00
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String getID(char delim) const override { return "Literal" + (delim + applyVisitor(FieldVisitorDump(), value)); }
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2011-12-12 06:15:34 +00:00
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2017-04-01 07:20:54 +00:00
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ASTPtr clone() const override { return std::make_shared<ASTLiteral>(*this); }
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2015-08-05 21:38:31 +00:00
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2019-01-23 13:20:03 +00:00
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void updateTreeHashImpl(SipHash & hash_state) const override;
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2015-08-05 21:38:31 +00:00
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protected:
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2017-12-01 18:36:55 +00:00
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void formatImplWithoutAlias(const FormatSettings & settings, FormatState &, FormatStateStacked) const override
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2017-04-01 07:20:54 +00:00
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{
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settings.ostr << applyVisitor(FieldVisitorToString(), value);
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}
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2017-12-01 18:36:55 +00:00
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2018-06-27 16:34:11 +00:00
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void appendColumnNameImpl(WriteBuffer & ostr) const override;
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2010-06-24 19:12:10 +00:00
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};
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}
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