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22 lines
562 B
C++
22 lines
562 B
C++
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#pragma once
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#include <DB/Parsers/ParserQueryWithOutput.h>
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namespace DB
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{
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/** CASE construction
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* Two variants:
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* 1. CASE expr WHEN val1 THEN res1 [WHEN ...] ELSE resN END
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* 2. CASE WHEN cond1 THEN res1 [WHEN ...] ELSE resN END
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* NOTE Until we get full support for NULL values in ClickHouse, ELSE sections are mandatory.
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*/
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class ParserCase final : public IParserBase
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{
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protected:
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const char * getName() const override { return "case"; }
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bool parseImpl(Pos & pos, Pos end, ASTPtr & node, Pos & max_parsed_pos, Expected & expected) override;
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};
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}
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