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CLICKHOUSE-3819 add CASE without ELSE

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This commit is contained in:
VadimPE 2018-08-20 11:06:47 +03:00
parent 88f1346be4
commit a93d527b34
1 changed files with 14 additions and 2 deletions
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16
dbms/src/Parsers/ParserCase.cpp
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@ -50,8 +50,20 @@ bool ParserCase::parseImpl(Pos & pos, ASTPtr & node, Expected & expected)
if (!has_branch)
return false;
if (!s_else.ignore(pos, expected))
return false;
if (s_else.ignore(pos, expected))
{
ASTPtr expr_else;
if (!p_expr.parse(pos, expr_else, expected))
return false;
args.push_back(expr_else);
}
else
{
Field field;
ASTLiteral null_literal(field);
DB::IAST ptr_ = &null_literal;
args.push_back(ptr_);
}
ASTPtr expr_else;
if (!p_expr.parse(pos, expr_else, expected))