LogicalExternalRowLevelDeleteSink.java

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package org.apache.doris.nereids.trees.plans.logical;

import org.apache.doris.catalog.Column;
import org.apache.doris.datasource.ExternalDatabase;
import org.apache.doris.datasource.ExternalTable;
import org.apache.doris.nereids.memo.GroupExpression;
import org.apache.doris.nereids.properties.LogicalProperties;
import org.apache.doris.nereids.trees.expressions.NamedExpression;
import org.apache.doris.nereids.trees.plans.Plan;
import org.apache.doris.nereids.trees.plans.PlanType;
import org.apache.doris.nereids.trees.plans.PropagateFuncDeps;
import org.apache.doris.nereids.trees.plans.algebra.Sink;
import org.apache.doris.nereids.trees.plans.visitor.PlanVisitor;
import org.apache.doris.nereids.util.Utils;

import com.google.common.base.Preconditions;
import com.google.common.collect.ImmutableList;

import java.util.List;
import java.util.Objects;
import java.util.Optional;

/**
 * Logical external row-level delete sink for DELETE operations.
 * This sink is responsible for writing position delete files.
 */
public class LogicalExternalRowLevelDeleteSink<CHILD_TYPE extends Plan> extends LogicalTableSink<CHILD_TYPE>
        implements Sink, PropagateFuncDeps {
    private final ExternalDatabase database;
    private final ExternalTable targetTable;

    /**
     * Constructor.
     *
     * <p>{@code database}/{@code targetTable} are typed to the generic {@link ExternalDatabase}/
     * {@link ExternalTable} (not concrete iceberg types): the synthesis passes a
     * {@code PluginDrivenExternalTable} for the iceberg table. Every consumer ({@code ExplainCommand}, the
     * implementation rule, the translator) only uses the generic {@code getId()}/schema API.</p>
     */
    public LogicalExternalRowLevelDeleteSink(ExternalDatabase database,
                                   ExternalTable targetTable,
                                   List<Column> cols,
                                   List<NamedExpression> outputExprs,
                                   Optional<GroupExpression> groupExpression,
                                   Optional<LogicalProperties> logicalProperties,
                                   CHILD_TYPE child) {
        super(PlanType.LOGICAL_EXTERNAL_ROW_LEVEL_DELETE_SINK, outputExprs, groupExpression, logicalProperties,
                cols, child);
        this.database = Objects.requireNonNull(database,
                "database != null in LogicalExternalRowLevelDeleteSink");
        this.targetTable = Objects.requireNonNull(targetTable,
                "targetTable != null in LogicalExternalRowLevelDeleteSink");
    }

    public Plan withChildAndUpdateOutput(Plan child) {
        List<NamedExpression> output = child.getOutput().stream()
                .map(NamedExpression.class::cast)
                .collect(ImmutableList.toImmutableList());
        return new LogicalExternalRowLevelDeleteSink<>(database, targetTable, cols, output,
                Optional.empty(), Optional.empty(), child);
    }

    @Override
    public Plan withChildren(List<Plan> children) {
        Preconditions.checkArgument(children.size() == 1, "LogicalExternalRowLevelDeleteSink only accepts one child");
        return new LogicalExternalRowLevelDeleteSink<>(database, targetTable, cols, outputExprs,
                Optional.empty(), Optional.empty(), children.get(0));
    }

    public LogicalExternalRowLevelDeleteSink<CHILD_TYPE> withOutputExprs(List<NamedExpression> outputExprs) {
        return new LogicalExternalRowLevelDeleteSink<>(database, targetTable, cols, outputExprs,
                Optional.empty(), Optional.empty(), child());
    }

    public ExternalDatabase getDatabase() {
        return database;
    }

    public ExternalTable getTargetTable() {
        return targetTable;
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) {
            return true;
        }
        if (o == null || getClass() != o.getClass()) {
            return false;
        }
        if (!super.equals(o)) {
            return false;
        }
        LogicalExternalRowLevelDeleteSink<?> that = (LogicalExternalRowLevelDeleteSink<?>) o;
        return Objects.equals(database, that.database)
                && Objects.equals(targetTable, that.targetTable)
                && Objects.equals(cols, that.cols);
    }

    @Override
    public int hashCode() {
        return Objects.hash(super.hashCode(), database, targetTable, cols);
    }

    @Override
    public String toString() {
        return Utils.toSqlString("LogicalExternalRowLevelDeleteSink[" + id.asInt() + "]",
                "outputExprs", outputExprs,
                "database", database.getFullName(),
                "targetTable", targetTable.getName(),
                "cols", cols
        );
    }

    @Override
    public <R, C> R accept(PlanVisitor<R, C> visitor, C context) {
        return visitor.visitLogicalExternalRowLevelDeleteSink(this, context);
    }

    @Override
    public Plan withGroupExpression(Optional<GroupExpression> groupExpression) {
        return new LogicalExternalRowLevelDeleteSink<>(database, targetTable, cols, outputExprs,
                groupExpression, Optional.of(getLogicalProperties()), child());
    }

    @Override
    public Plan withGroupExprLogicalPropChildren(Optional<GroupExpression> groupExpression,
            Optional<LogicalProperties> logicalProperties, List<Plan> children) {
        return new LogicalExternalRowLevelDeleteSink<>(database, targetTable, cols, outputExprs,
                groupExpression, logicalProperties, children.get(0));
    }
}