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Allow to parse +inf #1839

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This commit is contained in:
Alexey Milovidov 2020-04-15 06:32:33 +03:00
parent 747bb16677
commit 738fef71f4
3 changed files with 31 additions and 2 deletions
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27
src/IO/readFloatText.h
View File

@ -156,6 +156,9 @@ ReturnType readFloatTextPreciseImpl(T & x, ReadBuffer & buf)
{ {
switch (*buf.position()) switch (*buf.position())
{ {
case '+':
continue;
case '-': case '-':
{ {
negative = true; negative = true;
@ -335,6 +338,7 @@ ReturnType readFloatTextFastImpl(T & x, ReadBuffer & in)
++in.position(); ++in.position();
} }
auto count_after_sign = in.count(); auto count_after_sign = in.count();
constexpr int significant_digits = std::numeric_limits<UInt64>::digits10; constexpr int significant_digits = std::numeric_limits<UInt64>::digits10;
@ -380,7 +384,7 @@ ReturnType readFloatTextFastImpl(T & x, ReadBuffer & in)
if (in.eof()) if (in.eof())
{ {
if constexpr (throw_exception) if constexpr (throw_exception)
throw Exception("Cannot read floating point value", ErrorCodes::CANNOT_PARSE_NUMBER); throw Exception("Cannot read floating point value: nothing after exponent", ErrorCodes::CANNOT_PARSE_NUMBER);
else else
return false; return false;
} }
@ -418,11 +422,30 @@ ReturnType readFloatTextFastImpl(T & x, ReadBuffer & in)
if (in.eof()) if (in.eof())
{ {
if constexpr (throw_exception) if constexpr (throw_exception)
throw Exception("Cannot read floating point value", ErrorCodes::CANNOT_PARSE_NUMBER); throw Exception("Cannot read floating point value: no digits read", ErrorCodes::CANNOT_PARSE_NUMBER);
else else
return false; return false;
} }
if (*in.position() == '+')
{
++in.position();
if (in.eof())
{
if constexpr (throw_exception)
throw Exception("Cannot read floating point value: nothing after plus sign", ErrorCodes::CANNOT_PARSE_NUMBER);
else
return false;
}
else if (negative)
{
if constexpr (throw_exception)
throw Exception("Cannot read floating point value: plus after minus sign", ErrorCodes::CANNOT_PARSE_NUMBER);
else
return false;
}
}
if (*in.position() == 'i' || *in.position() == 'I') if (*in.position() == 'i' || *in.position() == 'I')
{ {
if (assertOrParseInfinity<throw_exception>(in)) if (assertOrParseInfinity<throw_exception>(in))

3
tests/queries/0_stateless/01198_plus_inf.reference Normal file
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@ -0,0 +1,3 @@
inf
-inf
inf

3
tests/queries/0_stateless/01198_plus_inf.sql Normal file
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@ -0,0 +1,3 @@
SELECT DISTINCT toFloat64(arrayJoin(['+inf', '+Inf', '+INF', '+infinity', '+Infinity']));
SELECT DISTINCT toFloat64(arrayJoin(['-inf', '-Inf', '-INF', '-infinity', '-Infinity']));
SELECT DISTINCT toFloat64(arrayJoin(['inf', 'Inf', 'INF', 'infinity', 'Infinity']));