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Addition to prev. revision [#METR-19266].

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This commit is contained in:
Alexey Milovidov 2016-12-30 08:55:23 +03:00
parent 3f9fc77e22
commit 81a08bcd87
1 changed files with 17 additions and 4 deletions
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21
dbms/src/DataTypes/DataTypeNullable.cpp
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@ -122,12 +122,25 @@ void DataTypeNullable::deserializeTextEscaped(IColumn & column, ReadBuffer & ist
},
[this, &istr] (IColumn & nested)
{
/// We need to place backslash back in front of istr.
if (istr.position() != istr.buffer().begin())
{
/// We could step back to consume backslash again.
--istr.position();
nested_data_type->deserializeTextEscaped(nested, istr);
}
else
{
/// Otherwise, we need to place backslash back in front of istr.
ReadBuffer prefix(const_cast<char *>("\\"), 1, 0);
ConcatReadBuffer prepended_istr(prefix, istr);
ReadBuffer prefix(const_cast<char *>("\\"), 1, 0);
ConcatReadBuffer prepended_istr(prefix, istr);
nested_data_type->deserializeTextEscaped(nested, prepended_istr);
nested_data_type->deserializeTextEscaped(nested, prepended_istr);
/// Synchronise cursor position in original buffer.
if (prepended_istr.count() > 1)
istr.position() = prepended_istr.position();
}
});
}
}