DistributionSpecExternalTableSinkUnPartitioned.java

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package org.apache.doris.nereids.properties;

/**
 * Adaptive writer distribution for external sinks without an ownership key.
 *
 * <p>This preserves the original Hive non-partitioned ScaleWriter behavior. Hive and Iceberg
 * choose it explicitly in the first phase of the common sink-exchange work; other external
 * formats continue to share it until their own distribution contracts are modeled.
 */
public final class DistributionSpecExternalTableSinkUnPartitioned extends DistributionSpec {

    public static final DistributionSpecExternalTableSinkUnPartitioned INSTANCE =
            new DistributionSpecExternalTableSinkUnPartitioned();

    private DistributionSpecExternalTableSinkUnPartitioned() {
    }

    @Override
    public boolean satisfy(DistributionSpec required) {
        return required instanceof DistributionSpecExternalTableSinkUnPartitioned;
    }

    @Override
    public String shapeInfo() {
        return "DistributionSpecExternalTableSinkUnPartitioned";
    }
}