ClearContextStatus.java

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package org.apache.doris.nereids.rules.rewrite;

import org.apache.doris.nereids.jobs.JobContext;
import org.apache.doris.nereids.trees.plans.Plan;
import org.apache.doris.nereids.trees.plans.visitor.CustomRewriter;

/**
 * pull up LogicalCteAnchor to the top of plan to avoid CteAnchor break other rewrite rules pattern
 * The front producer may depend on the back producer in {@code List<LogicalCTEProducer<Plan>>}
 * After this rule, we normalize all CteAnchor in plan, all CteAnchor under CteProducer should pull out
 * and put all of them to the top of plan depends on dependency tree of them.
 */
public class ClearContextStatus implements CustomRewriter {

    @Override
    public Plan rewriteRoot(Plan plan, JobContext jobContext) {
        jobContext.getCascadesContext().getStatementContext().getRewrittenCteConsumer().clear();
        jobContext.getCascadesContext().getStatementContext().getRewrittenCteProducer().clear();
        jobContext.getCascadesContext().getStatementContext().getCteIdToOutputIds().clear();
        jobContext.getCascadesContext().getStatementContext().getConsumerIdToFilters().clear();
        return plan;
    }
}