MaterializedViewProjectJoinRule.java

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package org.apache.doris.nereids.rules.exploration.mv;

import org.apache.doris.nereids.rules.Rule;
import org.apache.doris.nereids.rules.RuleType;
import org.apache.doris.nereids.trees.plans.Plan;
import org.apache.doris.nereids.trees.plans.logical.LogicalJoin;
import org.apache.doris.nereids.trees.plans.logical.LogicalPlan;
import org.apache.doris.nereids.trees.plans.logical.LogicalProject;

import com.google.common.collect.ImmutableList;

import java.util.List;

/**
 * This is responsible for join  pattern such as project on join
 * */
public class MaterializedViewProjectJoinRule extends AbstractMaterializedViewJoinRule {

    public static final MaterializedViewProjectJoinRule INSTANCE = new MaterializedViewProjectJoinRule();

    @Override
    public List<Rule> buildRules() {
        return ImmutableList.of(
                logicalProject(logicalJoin(any().when(LogicalPlan.class::isInstance),
                        any().when(LogicalPlan.class::isInstance))).thenApplyMultiNoThrow(ctx -> {
                            LogicalProject<LogicalJoin<Plan, Plan>> root = ctx.root;
                            return rewrite(root, ctx.cascadesContext);
                        }).toRule(RuleType.MATERIALIZED_VIEW_PROJECT_JOIN));
    }
}