public RelTraitSet traitSetOf(RelTrait... traits) {
RelTraitSet traitSet = emptyTraitSet;
assert traitSet.size() == planner.getRelTraitDefs().size();
for (RelTrait trait : traits) {
traitSet = traitSet.replace(trait);
}
return traitSet;
}
public SortRel copy(
RelTraitSet traitSet,
RelNode newInput,
RelCollation newCollation,
RexNode offset,
RexNode fetch) {
assert traitSet.containsIfApplicable(Convention.NONE);
return new SortRel(getCluster(), traitSet, newInput, newCollation, offset, fetch);
}
/**
* Creates new RelNodes replacing/removing the original project/row scan
*
* @param projectedScan new scan that is now projected
* @param origProject original projection
* @param needRename true if fields from the row scan need to be renamed
* @param newProject projection that contains the new projection expressions, in the case where
* the original projection cannot be removed because it projects expressions
* @return new RelNode
*/
public RelNode createNewRelNode(
RelNode projectedScan, ProjectRel origProject, boolean needRename, ProjectRel newProject) {
RelNode scanRel;
if (needRename) {
// Replace calling convention with FENNEL_EXEC_CONVENTION
RelTraitSet traits = RelOptUtil.clone(origProject.getTraits());
traits.setTrait(CallingConventionTraitDef.instance, FennelRel.FENNEL_EXEC_CONVENTION);
if (!traits.equals(projectedScan.getTraits())) {
RelNode mergedProjectedScan = convert(projectedScan, traits);
RelOptPlanner planner = projectedScan.getCluster().getPlanner();
// register projectedScan == mergedProjectedScan
// so mergedProjectedScan will have a set later on
projectedScan = planner.ensureRegistered(mergedProjectedScan, projectedScan);
}
scanRel =
new FennelRenameRel(
origProject.getCluster(),
projectedScan,
RelOptUtil.getFieldNames(origProject.getRowType()),
traits);
} else {
scanRel = projectedScan;
}
if (newProject == null) {
return scanRel;
} else {
// in the case where the projection had expressions, put the
// new, modified projection on top of the projected row scan
return (ProjectRel)
CalcRel.createProject(
scanRel,
newProject.getProjectExps(),
RelOptUtil.getFieldNames(newProject.getRowType()));
}
}
/**
* Creates a sorter.
*
* @param cluster Cluster this relational expression belongs to
* @param traits Traits
* @param child input relational expression
* @param collation array of sort specifications
* @param offset Expression for number of rows to discard before returning first row
* @param fetch Expression for number of rows to fetch
*/
public SortRel(
RelOptCluster cluster,
RelTraitSet traits,
RelNode child,
RelCollation collation,
RexNode offset,
RexNode fetch) {
super(cluster, traits, child);
this.collation = collation;
this.offset = offset;
this.fetch = fetch;
assert traits.containsIfApplicable(collation) : "traits=" + traits + ", collation=" + collation;
assert !(fetch == null && offset == null && collation.getFieldCollations().isEmpty())
: "trivial sort";
ImmutableList.Builder<RexNode> builder = ImmutableList.builder();
for (RelFieldCollation field : collation.getFieldCollations()) {
int index = field.getFieldIndex();
builder.add(cluster.getRexBuilder().makeInputRef(child, index));
}
fieldExps = builder.build();
}
public SortRel copy(
RelTraitSet traitSet, RelNode newInput, List<RelFieldCollation> newCollations) {
assert traitSet.comprises(Convention.NONE);
return new SortRel(
getCluster(), getCluster().traitSetOf(Convention.NONE), newInput, newCollations);
}
public RelNode copy(RelTraitSet traitSet, List<RelNode> inputs) {
assert traitSet.comprises(Convention.NONE);
assert inputs.isEmpty();
return new ValuesRel(getCluster(), rowType, tuples);
}