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feat(optimizer): add session switch to optionally enable optimizer

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This commit is contained in:
drrtuy
2025-06-16 13:26:11 +00:00
parent ab6063bec4
commit 25c7d23c21
4 changed files with 67 additions and 39 deletions
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54
dbcon/mysql/rulebased_optimizer.cpp
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@ -21,36 +21,52 @@
namespace optimizer {
bool Rule::apply(execplan::CalpontSelectExecutionPlan& csep)
bool optimizeCSEPWithRules(execplan::CalpontSelectExecutionPlan& root, const std::vector<Rule>& rules) {
bool changed = false;
for (const auto& rule : rules)
{
changed |= rule.apply(root);
}
return changed;
}
bool optimizeCSEP(execplan::CalpontSelectExecutionPlan& root)
{
optimizer::Rule parallelCES{"parallelCES", optimizer::matchParallelCES, optimizer::applyParallelCES};
std::vector<Rule> rules = {parallelCES};
return optimizeCSEPWithRules(root, rules);
}
// DFS walk
bool Rule::apply(execplan::CalpontSelectExecutionPlan& csep) const
{
bool rewrite = false;
for (auto& table : csep.derivedTableList())
{
auto& csepLocal = *dynamic_cast<execplan::CalpontSelectExecutionPlan*>(table.get());
if (matchRule(csepLocal))
auto* csepPtr = dynamic_cast<execplan::CalpontSelectExecutionPlan*>(table.get());
if (!csepPtr)
{
applyRule(csepLocal);
rewrite = true;
}
else
{
rewrite |= apply(csepLocal);
continue;
}
auto& csepLocal = *csepPtr;
rewrite |= apply(csepLocal);
}
for (auto& unionUnit : csep.unionVec())
{
auto& unionUnitLocal = *dynamic_cast<execplan::CalpontSelectExecutionPlan*>(unionUnit.get());
auto* unionUnitPtr = dynamic_cast<execplan::CalpontSelectExecutionPlan*>(unionUnit.get());
if (!unionUnitPtr)
{
continue;
}
if (matchRule(unionUnitLocal))
{
applyRule(unionUnitLocal);
rewrite = true;
}
else
{
rewrite |= apply(unionUnitLocal);
}
auto& unionUnitLocal = *unionUnitPtr;
rewrite |= apply(unionUnitLocal);
}
if (matchRule(csep))