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Fix error

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This commit is contained in:
Alexey Milovidov 2023-01-09 04:22:13 +01:00
parent d331f0ce82
commit 673472cbdc
1 changed files with 8 additions and 4 deletions
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12
src/Parsers/ExpressionElementParsers.cpp
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@ -1,8 +1,9 @@
#include <cerrno>
#include <cstdlib>
#include <Poco/String.h>
#include <IO/ReadBufferFromMemory.h>
#include <IO/ReadHelpers.h>
#include <IO/readFloatText.h>
#include <Common/typeid_cast.h>
#include <Common/StringUtils/StringUtils.h>
@ -828,9 +829,12 @@ bool ParserNumber::parseImpl(Pos & pos, ASTPtr & node, Expected & expected)
auto try_read_float = [&](const char * it, const char * end)
{
Float64 float_value = 0;
ReadBufferFromMemory buf(it, end - it);
if (tryReadFloatTextPrecise(float_value, buf))
std::string buf(it, end); /// Copying is needed to ensure the string is 0-terminated.
char * str_end;
errno = 0; /// Functions strto* don't clear errno.
/// The usage of strtod is needed, because we parse hex floating point literals as well.
Float64 float_value = std::strtod(buf.c_str(), &str_end);
if (str_end == buf.c_str() + buf.size() && errno != ERANGE)
{
if (float_value < 0)
throw Exception("Logical error: token number cannot begin with minus, but parsed float number is less than zero.", ErrorCodes::LOGICAL_ERROR);