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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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7
dbcon/mysql/rbo_apply_parallel_ces.cpp
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@@ -54,7 +54,7 @@ bool tableIsInUnion(const execplan::CalpontSystemCatalog::TableAliasName& table,
});
}
bool matchParallelCES(execplan::CalpontSelectExecutionPlan& csep)
bool parallelCESFilter(execplan::CalpontSelectExecutionPlan& csep)
{
auto tables = csep.tableList();
// This is leaf and there are no other tables at this level in neither UNION, nor derived table.
@@ -198,12 +198,13 @@ execplan::CalpontSelectExecutionPlan::SelectList makeUnionFromTable(
return unionVec;
}
void applyParallelCES(execplan::CalpontSelectExecutionPlan& csep, RBOptimizerContext& ctx)
bool applyParallelCES(execplan::CalpontSelectExecutionPlan& csep, RBOptimizerContext& ctx)
{
auto tables = csep.tableList();
execplan::CalpontSelectExecutionPlan::TableList newTableList;
execplan::CalpontSelectExecutionPlan::SelectList newDerivedTableList;
execplan::CalpontSelectExecutionPlan::ReturnedColumnList newReturnedColumns;
bool ruleHasBeenApplied = false;
// ATM Must be only 1 table
for (auto& table : tables)
@@ -246,6 +247,7 @@ void applyParallelCES(execplan::CalpontSelectExecutionPlan& csep, RBOptimizerCon
// Remove the filters as they were pushed down to union units
// This is inappropriate for EXISTS filter and join conditions
derivedSCEP->filters(nullptr);
ruleHasBeenApplied = true;
}
}
// Remove the filters if necessary using csep.filters(nullptr) as they were pushed down to union units
@@ -255,6 +257,7 @@ void applyParallelCES(execplan::CalpontSelectExecutionPlan& csep, RBOptimizerCon
// Replace table list with new table list populated with union units
csep.tableList(newTableList);
csep.returnedCols(newReturnedColumns);
return ruleHasBeenApplied;
}
} // namespace optimizer