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MCOL-641 Add support for functions (Part 1).

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This commit is contained in:
Gagan Goel
2020-04-19 23:27:43 -04:00
committed by Roman Nozdrin
parent 554c6da8e8
commit cfe35b5c7f
28 changed files with 2102 additions and 462 deletions
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31
dbcon/mysql/ha_mcs_execplan.cpp
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@ -4095,6 +4095,20 @@ ReturnedColumn* buildFunctionColumn(
fc->functionParms(funcParms);
fc->resultType(colType_MysqlToIDB(ifp));
// if the result type is DECIMAL and any function parameter is a wide decimal
// column, set the result colwidth to wide
if (fc->resultType().colDataType == CalpontSystemCatalog::DECIMAL)
{
for (size_t i = 0; i < funcParms.size(); i++)
{
if (datatypes::Decimal::isWideDecimalType(funcParms[i]->data()->resultType()))
{
fc->resultType().colWidth = datatypes::MAXDECIMALWIDTH;
break;
}
}
}
// MySQL give string result type for date function, but has the flag set.
// we should set the result type to be datetime for comparision.
if (ifp->field_type() == MYSQL_TYPE_DATETIME ||
@ -4410,6 +4424,14 @@ ConstantColumn* buildDecimalColumn(Item* item, gp_walk_info& gwi)
i = 1;
}
bool specialPrecision = false;
// handle the case when the constant value is 0.12345678901234567890123456789012345678
// In this case idp->decimal_precision() = 39, but we can
if (((i + 1) < str->length()) &&
str->ptr()[i] == '0' && str->ptr()[i + 1] == '.')
specialPrecision = true;
for (; i < str->length(); i++)
{
if (str->ptr()[i] == '.')
@ -4420,7 +4442,9 @@ ConstantColumn* buildDecimalColumn(Item* item, gp_walk_info& gwi)
if (idp->decimal_precision() <= datatypes::INT64MAXPRECISION)
columnstore_decimal.value = strtoll(columnstore_decimal_val.str().c_str(), 0, 10);
else if (idp->decimal_precision() <= datatypes::INT128MAXPRECISION)
else if (idp->decimal_precision() <= datatypes::INT128MAXPRECISION ||
(idp->decimal_precision() <= datatypes::INT128MAXPRECISION + 1 &&
specialPrecision))
{
bool dummy = false;
columnstore_decimal.s128Value =
@ -4435,9 +4459,10 @@ ConstantColumn* buildDecimalColumn(Item* item, gp_walk_info& gwi)
columnstore_decimal.value = (int64_t)(val > 0 ? val + 0.5 : val - 0.5);
}
else
columnstore_decimal.scale = idp->decimals;
columnstore_decimal.scale = idp->decimal_scale();
columnstore_decimal.precision = idp->max_length - idp->decimals;
columnstore_decimal.precision = (idp->decimal_precision() > datatypes::INT128MAXPRECISION) ?
datatypes::INT128MAXPRECISION : idp->decimal_precision();
ConstantColumn* cc = new ConstantColumn(valStr, columnstore_decimal);
cc->timeZone(gwi.thd->variables.time_zone->get_name()->ptr());
cc->charsetNumber(idp->collation.collation->number);