How to use

BuiltInMetadata$ColumnOrigin$Handler

in

org.apache.calcite.rel.metadata

/**
 * Returns the
 * {@link BuiltInMetadata.ColumnOrigin#getColumnOrigins(int)}
 * statistic.
 *
 * @param rel           the relational expression
 * @param column 0-based ordinal for output column of interest
 * @return set of origin columns, or null if this information cannot be
 * determined (whereas empty set indicates definitely no origin columns at
 * all)
 */
public Set<RelColumnOrigin> getColumnOrigins(RelNode rel, int column) {
 for (;;) {
  try {
   return columnOriginHandler.getColumnOrigins(rel, this, column);
  } catch (JaninoRelMetadataProvider.NoHandler e) {
   columnOriginHandler =
     revise(e.relClass, BuiltInMetadata.ColumnOrigin.DEF);
  }
 }
}

/**
 * Returns the
 * {@link BuiltInMetadata.ColumnOrigin#getColumnOrigins(int)}
 * statistic.
 *
 * @param rel           the relational expression
 * @param column 0-based ordinal for output column of interest
 * @return set of origin columns, or null if this information cannot be
 * determined (whereas empty set indicates definitely no origin columns at
 * all)
 */
public Set<RelColumnOrigin> getColumnOrigins(RelNode rel, int column) {
 for (;;) {
  try {
   return columnOriginHandler.getColumnOrigins(rel, this, column);
  } catch (JaninoRelMetadataProvider.NoHandler e) {
   columnOriginHandler =
     revise(e.relClass, BuiltInMetadata.ColumnOrigin.DEF);
  }
 }
}