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quick fix for decimal encode #210

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merged 3 commits into from
Aug 30, 2019
Merged

quick fix for decimal encode #210

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2d12549
quick fix for decimal encode
windtalker Aug 30, 2019
54b4968
address comments
windtalker Aug 30, 2019
1e832b9
update comments
windtalker Aug 30, 2019
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7 changes: 7 additions & 0 deletions dbms/src/Storages/Transaction/Codec.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -414,6 +414,13 @@ void EncodeDecimalImpl(const T & dec, PrecType prec, ScaleType frac, std::string
{
static_assert(IsDecimal<T>);

// todo this is a work around, this fix only makes the encoded value as a valid value, the encoded prec
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// and scale is not the same as TiDB request, but luckily TiDB can handle this when reading from dag
// response. In order to encoding the decimal with the type requested by TiDB, TiFlash should get the
// prec and scale from column
if (prec < frac) {
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prec = frac;
}
constexpr Int32 decimal_mod = powers10[digitsPerWord];
ss << UInt8(prec) << UInt8(frac);

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