@Override
  public KeyedTableScan enableSplitTaskByDeleteRatio(double splitTaskByDeleteRatio) {
    this.splitTaskByDeleteRatio = splitTaskByDeleteRatio;
    return this;
  }
Config this scan with filter by the {@link Expression}. For Change Table, only filters related
to partition will take effect.

@param expr a filter expression
@return scan based on this with results filtered by the expression
amoro-format-iceberg/src/main/java/org/apache/amoro/scan/BasicKeyedTableScan.java