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MCOL-641 Implement int128_t versions of arithmetic operations and add unit test cases.

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This commit is contained in:
Gagan Goel
2020-04-03 13:30:10 -04:00
committed by Roman Nozdrin
parent b5534eb847
commit 554c6da8e8
8 changed files with 1254 additions and 502 deletions
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73
dbcon/mysql/ha_mcs_execplan.cpp
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@ -3105,17 +3105,13 @@ CalpontSystemCatalog::ColType colType_MysqlToIDB (const Item* item)
case DECIMAL_RESULT:
{
Item_decimal* idp = (Item_decimal*)item;
ct.colDataType = CalpontSystemCatalog::DECIMAL;
ct.colWidth = (idp->max_length >= datatypes::INT64MAXPRECISION)
? datatypes::MAXDECIMALWIDTH : utils::MAXLEGACYWIDTH;
ct.scale = idp->decimals;
// WIP MCOL-641
if (ct.scale == 0)
ct.precision = (idp->max_length > datatypes::INT128MAXPRECISION)
? datatypes::INT128MAXPRECISION : idp->max_length - 1;
else
ct.precision = (idp->max_length > datatypes::INT128MAXPRECISION )
? datatypes::INT128MAXPRECISION : idp->max_length - idp->decimals;
unsigned int precision = idp->decimal_precision();
unsigned int scale = idp->decimal_scale();
datatypes::Decimal::setDecimalScalePrecision(ct, precision, scale);
break;
}
@ -3141,7 +3137,7 @@ ReturnedColumn* buildReturnedColumn(
{
ReturnedColumn* rc = NULL;
if ( gwi.thd)
if (gwi.thd)
{
//if ( ((gwi.thd->lex)->sql_command == SQLCOM_UPDATE ) || ((gwi.thd->lex)->sql_command == SQLCOM_UPDATE_MULTI ))
{
@ -3444,6 +3440,7 @@ ArithmeticColumn* buildArithmeticColumn(
Item** sfitempp = item->arguments();
ArithmeticOperator* aop = new ArithmeticOperator(item->func_name());
aop->timeZone(gwi.thd->variables.time_zone->get_name()->ptr());
aop->setOverflowCheck(get_decimal_overflow_check(gwi.thd));
ParseTree* pt = new ParseTree(aop);
//ReturnedColumn *lhs = 0, *rhs = 0;
ParseTree* lhs = 0, *rhs = 0;
@ -3606,6 +3603,60 @@ ArithmeticColumn* buildArithmeticColumn(
// decimal arithmetic operation gives double result when the session variable is set.
CalpontSystemCatalog::ColType mysql_type = colType_MysqlToIDB(item);
if (mysql_type.colDataType == CalpontSystemCatalog::DECIMAL ||
mysql_type.colDataType == CalpontSystemCatalog::UDECIMAL)
{
int32_t leftColWidth = pt->left()->data()->resultType().colWidth;
int32_t rightColWidth = pt->right()->data()->resultType().colWidth;
// Revert back to legacy values of scale and precision
// if the 2 columns involved in the expression are not wide
if (leftColWidth <= utils::MAXLEGACYWIDTH &&
rightColWidth <= utils::MAXLEGACYWIDTH)
{
Item_decimal* idp = (Item_decimal*)item;
mysql_type.colWidth = 8;
unsigned int precision = idp->max_length;
unsigned int scale = idp->decimals;
datatypes::Decimal::setDecimalScalePrecisionLegacy(mysql_type, precision, scale);
}
else
{
if (leftColWidth == datatypes::MAXDECIMALWIDTH ||
rightColWidth == datatypes::MAXDECIMALWIDTH)
mysql_type.colWidth = datatypes::MAXDECIMALWIDTH;
if (mysql_type.colWidth == datatypes::MAXDECIMALWIDTH)
{
string funcName = item->func_name();
int32_t scale1 = pt->left()->data()->resultType().scale;
int32_t scale2 = pt->right()->data()->resultType().scale;
if (funcName == "/" &&
(mysql_type.scale - (scale1 - scale2)) > datatypes::INT128MAXPRECISION)
{
Item_decimal* idp = (Item_decimal*)item;
unsigned int precision = idp->decimal_precision();
unsigned int scale = idp->decimal_scale();
datatypes::Decimal::setDecimalScalePrecisionHeuristic(mysql_type, precision, scale);
if (mysql_type.scale < scale1)
mysql_type.scale = scale1;
if (mysql_type.precision < mysql_type.scale)
mysql_type.precision = mysql_type.scale;
}
}
}
}
if (get_double_for_decimal_math(current_thd) == true)
aop->adjustResultType(mysql_type);
else