Examples with Memo com.facebook.presto.sql.planner.iterative.Memo used on opensource projects

Example 1 with Memo

use of com.facebook.presto.sql.planner.iterative.Memo in project presto by prestodb.

the class RuleAssert method applyRule.

private RuleApplication applyRule() {
    PlanVariableAllocator variableAllocator = new PlanVariableAllocator(types.allVariables());
    Memo memo = new Memo(idAllocator, plan);
    Lookup lookup = Lookup.from(planNode -> Stream.of(memo.resolve(planNode)));
    PlanNode memoRoot = memo.getNode(memo.getRootGroup());
    return inTransaction(session -> applyRule(rule, memoRoot, ruleContext(statsCalculator, costCalculator, variableAllocator, memo, lookup, session)));
}

Example 2 with Memo

use of com.facebook.presto.sql.planner.iterative.Memo in project presto by prestodb.

the class CachingCostProvider method getGroupCost.

private PlanCostEstimate getGroupCost(GroupReference groupReference) {
    int group = groupReference.getGroupId();
    Memo memo = this.memo.orElseThrow(() -> new IllegalStateException("CachingCostProvider without memo cannot handle GroupReferences"));
    Optional<PlanCostEstimate> knownCost = memo.getCost(group);
    if (knownCost.isPresent()) {
        return knownCost.get();
    }
    PlanCostEstimate cost = calculateCost(memo.getNode(group));
    verify(!memo.getCost(group).isPresent(), "Group cost already set");
    memo.storeCost(group, cost);
    return cost;
}

Example 3 with Memo

use of com.facebook.presto.sql.planner.iterative.Memo in project presto by prestodb.

the class CachingStatsProvider method getGroupStats.

private PlanNodeStatsEstimate getGroupStats(GroupReference groupReference) {
    int group = groupReference.getGroupId();
    Memo memo = this.memo.orElseThrow(() -> new IllegalStateException("CachingStatsProvider without memo cannot handle GroupReferences"));
    Optional<PlanNodeStatsEstimate> stats = memo.getStats(group);
    if (stats.isPresent()) {
        return stats.get();
    }
    PlanNodeStatsEstimate groupStats = statsCalculator.calculateStats(memo.getNode(group), this, lookup, session, types);
    verify(!memo.getStats(group).isPresent(), "Group stats already set");
    memo.storeStats(group, groupStats);
    return groupStats;
}