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feat(rbo,rules): rule matcher has been replaced with csep filter for a rule to relax rule filter predicates and endless loop has been fixed in pushdown predicates.

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This commit is contained in:
drrtuy
2025-08-08 12:44:29 +00:00
committed by Leonid Fedorov
parent 67ac7f2f75
commit bbac8e70a1
7 changed files with 43 additions and 30 deletions
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14
dbcon/mysql/rulebased_optimizer.cpp
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@@ -31,6 +31,7 @@
#include "predicateoperator.h"
#include "simplefilter.h"
#include "rbo_apply_parallel_ces.h"
#include "rbo_predicate_pushdown.h"
namespace optimizer
{
@@ -54,12 +55,12 @@ bool optimizeCSEP(execplan::CalpontSelectExecutionPlan& root, optimizer::RBOptim
if (get_unstable_optimizer(&ctx.thd))
{
optimizer::Rule parallelCES{"parallelCES", optimizer::matchParallelCES, optimizer::applyParallelCES};
optimizer::Rule parallelCES{"parallelCES", optimizer::parallelCESFilter, optimizer::applyParallelCES};
rules.push_back(parallelCES);
}
optimizer::Rule predicatePushdown{"predicatePushdown", optimizer::matchParallelCES,
optimizer::applyParallelCES};
optimizer::Rule predicatePushdown{"predicatePushdown", optimizer::predicatePushdownFilter,
optimizer::applyPredicatePushdown};
rules.push_back(predicatePushdown);
return optimizeCSEPWithRules(root, rules, ctx);
@@ -114,7 +115,7 @@ bool Rule::walk(execplan::CalpontSelectExecutionPlan& csep, optimizer::RBOptimiz
}
// Walk nested subselect in filters, e.g. SEMI-JOIN
for (auto& subselect : csep.subSelectList())
for (auto& subselect : current->subSelectList())
{
auto* subselectPtr = dynamic_cast<execplan::CalpontSelectExecutionPlan*>(subselect.get());
if (subselectPtr)
@@ -125,11 +126,10 @@ bool Rule::walk(execplan::CalpontSelectExecutionPlan& csep, optimizer::RBOptimiz
// TODO add walking nested subselect in projection. See CSEP::fSelectSubList
if (matchRule(*current))
if (mayApply(*current))
{
applyRule(*current, ctx);
rewrite = applyRule(*current, ctx);
++ctx.uniqueId;
rewrite = true;
}
}