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Merge pull request #24427 from azat/formatting-fixes

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Fix formatting of negative values
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alexey-milovidov 2021-06-17 21:21:47 +03:00 committed by GitHub
commit 35411d1085
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4 changed files with 57 additions and 73 deletions
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72
src/Parsers/ASTFunction.cpp
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@ -231,68 +231,32 @@ void ASTFunction::formatImplWithoutAlias(const FormatSettings & settings, Format
}
const auto * literal = arguments->children[0]->as<ASTLiteral>();
/* A particularly stupid case. If we have a unary minus before
* a literal that is a negative number "-(-1)" or "- -1", this
* can not be formatted as `--1`, since this will be
* interpreted as a comment. Instead, negate the literal
* in place. Another possible solution is to use parentheses,
* but the old comment said it is impossible, without mentioning
* the reason. We should also negate the nonnegative literals,
* for symmetry. We print the negated value without parentheses,
* because they are not needed around a single literal. Also we
* use formatting from FieldVisitorToString, so that the type is
* preserved (e.g. -0. is printed with trailing period).
*/
if (literal && name == "negate")
{
written = applyVisitor(
[&settings](const auto & value)
// -INT_MAX is negated to -INT_MAX by the negate()
// function, so we can implement this behavior here as
// well. Technically it is an UB to perform such negation
// w/o a cast to unsigned type.
NO_SANITIZE_UNDEFINED
{
using ValueType = std::decay_t<decltype(value)>;
if constexpr (is_decimal_field<ValueType>)
{
// The parser doesn't create decimal literals, but
// they can be produced by constant folding or the
// fuzzer. Decimals are always signed, so no need
// to deduce the result type like we do for ints.
const auto int_value = value.getValue().value;
settings.ostr << FieldVisitorToString{}(ValueType{
-int_value,
value.getScale()});
}
else if constexpr (std::is_arithmetic_v<ValueType>)
{
using ResultType = typename NumberTraits::ResultOfNegate<ValueType>::Type;
settings.ostr << FieldVisitorToString{}(
-static_cast<ResultType>(value));
return true;
}
return false;
},
literal->value);
if (written)
{
break;
}
}
const auto * function = arguments->children[0]->as<ASTFunction>();
bool negate = name == "negate";
// negate always requires parentheses, otherwise -(-1) will be printed as --1
bool negate_need_parens = negate && (literal || (function && function->name == "negate"));
// We don't need parentheses around a single literal.
if (!literal && frame.need_parens)
bool need_parens = !literal && frame.need_parens && !negate_need_parens;
// do not add extra parentheses for functions inside negate, i.e. -(-toUInt64(-(1)))
if (negate_need_parens)
nested_need_parens.need_parens = false;
if (need_parens)
settings.ostr << '(';
settings.ostr << (settings.hilite ? hilite_operator : "") << func[1] << (settings.hilite ? hilite_none : "");
if (negate_need_parens)
settings.ostr << '(';
arguments->formatImpl(settings, state, nested_need_parens);
written = true;
if (!literal && frame.need_parens)
if (negate_need_parens)
settings.ostr << ')';
if (need_parens)
settings.ostr << ')';
break;

38
tests/queries/0_stateless/01566_negate_formatting.reference
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@ -1,34 +1,34 @@
-- { echo }
explain syntax select negate(1), negate(-1), - -1, -(-1), (-1) in (-1);
SELECT
-1,
1,
1,
1,
-(1),
-(-1),
-(-1),
-(-1),
-1 IN (-1)
explain syntax select negate(1.), negate(-1.), - -1., -(-1.), (-1.) in (-1.);
SELECT
-1.,
1.,
1.,
1.,
-(1.),
-(-1.),
-(-1.),
-(-1.),
-1. IN (-1.)
explain syntax select negate(-9223372036854775808), -(-9223372036854775808), - -9223372036854775808;
SELECT
-9223372036854775808,
-9223372036854775808,
-9223372036854775808
-(-9223372036854775808),
-(-9223372036854775808),
-(-9223372036854775808)
explain syntax select negate(0), negate(-0), - -0, -(-0), (-0) in (-0);
SELECT
0,
0,
0,
0,
-(0),
-(0),
-(0),
-(0),
0 IN (0)
explain syntax select negate(0.), negate(-0.), - -0., -(-0.), (-0.) in (-0.);
SELECT
-0.,
0.,
0.,
0.,
-(0.),
-(-0.),
-(-0.),
-(-0.),
-0. IN (-0.)

13
tests/queries/0_stateless/01881_negate_formatting.reference Normal file
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@ -0,0 +1,13 @@
-- { echo }
EXPLAIN SYNTAX SELECT -1;
SELECT -1
EXPLAIN SYNTAX SELECT -(1);
SELECT -(1)
EXPLAIN SYNTAX SELECT -(-(1));
SELECT -(-(1))
EXPLAIN SYNTAX SELECT -(-(-(1)));
SELECT -(-(-(1)))
EXPLAIN SYNTAX SELECT -(-(-1));
SELECT -(-(-1))
EXPLAIN SYNTAX SELECT -(-toUInt64(-(1)));
SELECT -(-toUInt64(-(1)))

7
tests/queries/0_stateless/01881_negate_formatting.sql Normal file
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@ -0,0 +1,7 @@
-- { echo }
EXPLAIN SYNTAX SELECT -1;
EXPLAIN SYNTAX SELECT -(1);
EXPLAIN SYNTAX SELECT -(-(1));
EXPLAIN SYNTAX SELECT -(-(-(1)));
EXPLAIN SYNTAX SELECT -(-(-1));
EXPLAIN SYNTAX SELECT -(-toUInt64(-(1)));