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MCOL-4361 Replace pow(10.0, (double)scale) expressions with a static dictionary lookup.

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This commit is contained in:
Alexander Barkov
2021-04-09 12:14:41 +04:00
parent fd720bfd7d
commit 362bfcd15e
13 changed files with 153 additions and 132 deletions
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4
dbcon/mysql/ha_mcs_execplan.cpp
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@ -4463,8 +4463,8 @@ ConstantColumn* buildDecimalColumn(Item* item, gp_walk_info& gwi)
if (gwi.internalDecimalScale >= 0 && idp->decimals > (uint)gwi.internalDecimalScale)
{
columnstore_decimal.scale = gwi.internalDecimalScale;
double val = (double)(columnstore_decimal.value / pow((double)10, idp->decimals - gwi.internalDecimalScale));
columnstore_decimal.value = (int64_t)(val > 0 ? val + 0.5 : val - 0.5);
uint32_t diff = (uint32_t) (idp->decimals - gwi.internalDecimalScale);
columnstore_decimal.value= columnstore_decimal.TDecimal64::toSInt64Round(diff);
}
else
columnstore_decimal.scale = idp->decimal_scale();