How to use

of

method

in

org.apache.calcite.rex.RexTableInputRef

  tRef.getTable().getRowType().getFieldList().get(foreignKeyPos).getType();
RexTableInputRef foreignKeyColumnRef =
  RexTableInputRef.of(tRef, foreignKeyPos, foreignKeyColumnType);
int uniqueKeyPos = constraint.getColumnPairs().get(pos).target;
RexTableInputRef uniqueKeyColumnRef = RexTableInputRef.of(nonFkTable, uniqueKeyPos,
  nonFkTable.getTable().getRowType().getFieldList().get(uniqueKeyPos).getType());
if (ecT.getEquivalenceClassesMap().containsKey(uniqueKeyColumnRef) &&

  tRef.getTable().getRowType().getFieldList().get(foreignKeyPos).getType();
RexTableInputRef foreignKeyColumnRef =
  RexTableInputRef.of(tRef, foreignKeyPos, foreignKeyColumnType);
int uniqueKeyPos = constraint.getColumnPairs().get(pos).target;
RexTableInputRef uniqueKeyColumnRef = RexTableInputRef.of(nonFkTable, uniqueKeyPos,
  nonFkTable.getTable().getRowType().getFieldList().get(uniqueKeyPos).getType());
if (ecT.getEquivalenceClassesMap().containsKey(uniqueKeyColumnRef) &&

 @Override public RexNode visitTableInputRef(RexTableInputRef inputRef) {
  if (ec != null) {
   Set<RexTableInputRef> s = ec.get(inputRef);
   if (s != null) {
    inputRef = s.iterator().next();
   }
  }
  if (tableMapping != null) {
   inputRef = RexTableInputRef.of(
     tableMapping.get(inputRef.getTableRef()),
     inputRef.getIndex(),
     inputRef.getType());
  }
  return inputRef;
 }
};

 @Override public RexNode visitTableInputRef(RexTableInputRef inputRef) {
  if (tableMapping != null) {
   inputRef = RexTableInputRef.of(
     tableMapping.get(inputRef.getTableRef()),
     inputRef.getIndex(),
     inputRef.getType());
  }
  if (ec != null) {
   Set<RexTableInputRef> s = ec.get(inputRef);
   if (s != null) {
    inputRef = s.iterator().next();
   }
  }
  return inputRef;
 }
};

 @Override public RexNode visitTableInputRef(RexTableInputRef inputRef) {
  if (tableMapping != null) {
   inputRef = RexTableInputRef.of(
     tableMapping.get(inputRef.getTableRef()),
     inputRef.getIndex(),
     inputRef.getType());
  }
  if (ec != null) {
   Set<RexTableInputRef> s = ec.get(inputRef);
   if (s != null) {
    inputRef = s.iterator().next();
   }
  }
  return inputRef;
 }
};

 @Override public RexNode visitTableInputRef(RexTableInputRef inputRef) {
  if (ec != null) {
   Set<RexTableInputRef> s = ec.get(inputRef);
   if (s != null) {
    inputRef = s.iterator().next();
   }
  }
  if (tableMapping != null) {
   inputRef = RexTableInputRef.of(
     tableMapping.get(inputRef.getTableRef()),
     inputRef.getIndex(),
     inputRef.getType());
  }
  return inputRef;
 }
};

  tRef.getTable().getRowType().getFieldList().get(foreignKeyPos).getType();
RexTableInputRef foreignKeyColumnRef =
  RexTableInputRef.of(tRef, foreignKeyPos, foreignKeyColumnType);
int uniqueKeyPos = constraint.getColumnPairs().get(pos).target;
RexTableInputRef uniqueKeyColumnRef = RexTableInputRef.of(parentTRef, uniqueKeyPos,
  parentTRef.getTable().getRowType().getFieldList().get(uniqueKeyPos).getType());
if (!foreignKeyColumnType.isNullable()

  tRef.getTable().getRowType().getFieldList().get(foreignKeyPos).getType();
RexTableInputRef foreignKeyColumnRef =
  RexTableInputRef.of(tRef, foreignKeyPos, foreignKeyColumnType);
int uniqueKeyPos = constraint.getColumnPairs().get(pos).target;
RexTableInputRef uniqueKeyColumnRef = RexTableInputRef.of(parentTRef, uniqueKeyPos,
  parentTRef.getTable().getRowType().getFieldList().get(uniqueKeyPos).getType());
if (!foreignKeyColumnType.isNullable()

/**
 * Expression lineage from {@link TableScan}.
 *
 * <p>We extract the fields referenced by the expression and we express them
 * using {@link RexTableInputRef}.
 */
public Set<RexNode> getExpressionLineage(TableScan rel,
  RelMetadataQuery mq, RexNode outputExpression) {
 final RexBuilder rexBuilder = rel.getCluster().getRexBuilder();
 // Extract input fields referenced by expression
 final Set<RelDataTypeField> inputExtraFields = new LinkedHashSet<>();
 final RelOptUtil.InputFinder inputFinder = new RelOptUtil.InputFinder(inputExtraFields);
 outputExpression.accept(inputFinder);
 final ImmutableBitSet inputFieldsUsed = inputFinder.inputBitSet.build();
 // Infer column origin expressions for given references
 final Map<RexInputRef, Set<RexNode>> mapping = new LinkedHashMap<>();
 for (int idx : inputFieldsUsed) {
  final RexNode inputRef = RexTableInputRef.of(
    RelTableRef.of(rel.getTable(), 0),
    RexInputRef.of(idx, rel.getRowType().getFieldList()));
  final RexInputRef ref = RexInputRef.of(idx, rel.getRowType().getFieldList());
  mapping.put(ref, ImmutableSet.of(inputRef));
 }
 // Return result
 return createAllPossibleExpressions(rexBuilder, outputExpression, mapping);
}

/**
 * Expression lineage from {@link TableScan}.
 *
 * <p>We extract the fields referenced by the expression and we express them
 * using {@link RexTableInputRef}.
 */
public Set<RexNode> getExpressionLineage(TableScan rel,
  RelMetadataQuery mq, RexNode outputExpression) {
 final RexBuilder rexBuilder = rel.getCluster().getRexBuilder();
 // Extract input fields referenced by expression
 final ImmutableBitSet inputFieldsUsed = extractInputRefs(outputExpression);
 // Infer column origin expressions for given references
 final Map<RexInputRef, Set<RexNode>> mapping = new LinkedHashMap<>();
 for (int idx : inputFieldsUsed) {
  final RexNode inputRef = RexTableInputRef.of(
    RelTableRef.of(rel.getTable(), 0),
    RexInputRef.of(idx, rel.getRowType().getFieldList()));
  final RexInputRef ref = RexInputRef.of(idx, rel.getRowType().getFieldList());
  mapping.put(ref, ImmutableSet.of(inputRef));
 }
 // Return result
 return createAllPossibleExpressions(rexBuilder, outputExpression, mapping);
}

RexTableInputRef queryColumnRef = RexTableInputRef.of(queryTableRef,
  e.getKey().getIndex(), e.getKey().getType());

RexTableInputRef queryColumnRef = RexTableInputRef.of(queryTableRef,
  e.getKey().getIndex(), e.getKey().getType());