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Merge pull request #1367 from dhall-MariaDB/MCOL-3827

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MCOL-3827 Optimize out sort on SubQuery in Select
This commit is contained in:
Gagan Goel
2020-08-18 14:54:36 -04:00
committed by GitHub
parent 59cae761d5 e7b8abfdb9
commit f1759e6560
2 changed files with 19 additions and 11 deletions
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28
dbcon/mysql/ha_mcs_execplan.cpp
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@ -7791,12 +7791,16 @@ int getSelectPlan(gp_walk_info& gwi, SELECT_LEX& select_lex,
}
}
if (ordercol->direction == ORDER::ORDER_ASC)
rc->asc(true);
else
rc->asc(false);
SimpleColumn* sc = dynamic_cast<SimpleColumn*>(rc);
if (!sc || sc->oid())
{
if (ordercol->direction == ORDER::ORDER_ASC)
rc->asc(true);
else
rc->asc(false);
gwi.orderByCols.push_back(SRCP(rc));
gwi.orderByCols.push_back(SRCP(rc));
}
}
}
// make sure columnmap, returnedcols and count(*) arg_list are not empty
@ -9583,12 +9587,16 @@ int getGroupPlan(gp_walk_info& gwi, SELECT_LEX& select_lex, SCSEP& csep, cal_gro
}
}
if (ordercol->direction == ORDER::ORDER_ASC)
rc->asc(true);
else
rc->asc(false);
SimpleColumn* sc = dynamic_cast<SimpleColumn*>(rc);
if (!sc || sc->oid())
{
if (ordercol->direction == ORDER::ORDER_ASC)
rc->asc(true);
else
rc->asc(false);
gwi.orderByCols.push_back(SRCP(rc));
gwi.orderByCols.push_back(SRCP(rc));
}
}