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