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MCOL-1029 Skip cached conditions

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Cached conditions are things like (TRUE OR FALSE). They don't actually
add any value to the query and were breaking our working stack trying to
process them.
This commit is contained in:
Andrew Hutchings
2017-11-20 16:04:20 +00:00
parent 478fb0df92
commit d60bc999c6
1 changed files with 9 additions and 1 deletions
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10
dbcon/mysql/ha_calpont_execplan.cpp
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@ -4215,6 +4215,14 @@ void gp_walk(const Item *item, void *arg)
bool isOr = (ftype == Item_func::COND_OR_FUNC);
bool isXor = (ftype == Item_func::XOR_FUNC);
// MCOL-1029 A cached COND_ITEM is something like:
// AND (TRUE OR FALSE)
// We can skip it
if (isCached)
{
break;
}
List<Item> *argumentList;
List<Item> xorArgumentList;
if (isXor)
@ -4267,7 +4275,7 @@ void gp_walk(const Item *item, void *arg)
}
}
}
// @bug1603. MySQL's filter tree is a multi-tree grouped by operator. So more than
// two filters saved on the stack so far might belong to this operator.
uint32_t leftInStack = gwip->ptWorkStack.size() - argumentList->elements + 1;