How to use

values

method

in

org.apache.calcite.rel.metadata.RelMdCollation

  public RelDistribution get() {
    return RelMdDistribution.values(rowType, tuples);
  }
});

  public RelDistribution get() {
    return RelMdDistribution.values(rowType, tuples);
  }
});

public ImmutableList<RelCollation> collations(Values values,
  RelMetadataQuery mq) {
 return ImmutableList.copyOf(
   values(mq, values.getRowType(), values.getTuples()));
}

public ImmutableList<RelCollation> collations(Values values,
  RelMetadataQuery mq) {
 return ImmutableList.copyOf(
   values(mq, values.getRowType(), values.getTuples()));
}

/** Creates a LogicalValues. */
public static LogicalValues create(RelOptCluster cluster,
  final RelDataType rowType,
  final ImmutableList<ImmutableList<RexLiteral>> tuples) {
 final RelMetadataQuery mq = cluster.getMetadataQuery();
 final RelTraitSet traitSet = cluster.traitSetOf(Convention.NONE)
   .replaceIfs(RelCollationTraitDef.INSTANCE,
     () -> RelMdCollation.values(mq, rowType, tuples));
 return new LogicalValues(cluster, traitSet, rowType, tuples);
}

/** Creates a LogicalValues. */
public static LogicalValues create(RelOptCluster cluster,
  final RelDataType rowType,
  final ImmutableList<ImmutableList<RexLiteral>> tuples) {
 final RelMetadataQuery mq = cluster.getMetadataQuery();
 final RelTraitSet traitSet = cluster.traitSetOf(Convention.NONE)
   .replaceIfs(RelCollationTraitDef.INSTANCE,
     () -> RelMdCollation.values(mq, rowType, tuples));
 return new LogicalValues(cluster, traitSet, rowType, tuples);
}

/** Creates an EnumerableValues. */
public static EnumerableValues create(RelOptCluster cluster,
  final RelDataType rowType,
  final ImmutableList<ImmutableList<RexLiteral>> tuples) {
 final RelMetadataQuery mq = cluster.getMetadataQuery();
 final RelTraitSet traitSet =
   cluster.traitSetOf(EnumerableConvention.INSTANCE)
     .replaceIfs(RelCollationTraitDef.INSTANCE,
       () -> RelMdCollation.values(mq, rowType, tuples))
     .replaceIf(RelDistributionTraitDef.INSTANCE,
       () -> RelMdDistribution.values(rowType, tuples));
 return new EnumerableValues(cluster, rowType, tuples, traitSet);
}

/** Creates an EnumerableValues. */
public static EnumerableValues create(RelOptCluster cluster,
  final RelDataType rowType,
  final ImmutableList<ImmutableList<RexLiteral>> tuples) {
 final RelMetadataQuery mq = cluster.getMetadataQuery();
 final RelTraitSet traitSet =
   cluster.traitSetOf(EnumerableConvention.INSTANCE)
     .replaceIfs(RelCollationTraitDef.INSTANCE,
       () -> RelMdCollation.values(mq, rowType, tuples))
     .replaceIf(RelDistributionTraitDef.INSTANCE,
       () -> RelMdDistribution.values(rowType, tuples));
 return new EnumerableValues(cluster, rowType, tuples, traitSet);
}

collations = RelMdCollation.values(mq, empTable.getRowType(),
  ImmutableList.of());
assertThat(collations.toString(),
addRow(tuples, rexBuilder, 2, 3, 2, 2);
addRow(tuples, rexBuilder, 3, 3, 1, 4);
collations = RelMdCollation.values(mq, rowType, tuples.build());
assertThat(collations.toString(),
  equalTo("[[0, 1, 2, 3], [1, 3]]"));

collations = RelMdCollation.values(mq, empTable.getRowType(),
  ImmutableList.of());
assertThat(collations.toString(),
addRow(tuples, rexBuilder, 2, 3, 2, 2);
addRow(tuples, rexBuilder, 3, 3, 1, 4);
collations = RelMdCollation.values(mq, rowType, tuples.build());
assertThat(collations.toString(),
  equalTo("[[0, 1, 2, 3], [1, 3]]"));