How to use

makeSemiJoinSelectivityRexNode

method

in

org.apache.calcite.rel.metadata.RelMdUtil

public Double getRowCount(SemiJoin rel, RelMetadataQuery mq) {
 // create a RexNode representing the selectivity of the
 // semijoin filter and pass it to getSelectivity
 RexNode semiJoinSelectivity =
   RelMdUtil.makeSemiJoinSelectivityRexNode(mq, rel);
 return NumberUtil.multiply(
   mq.getSelectivity(rel.getLeft(), semiJoinSelectivity),
   mq.getRowCount(rel.getLeft()));
}

public Double getRowCount(SemiJoin rel, RelMetadataQuery mq) {
 // create a RexNode representing the selectivity of the
 // semijoin filter and pass it to getSelectivity
 RexNode semiJoinSelectivity =
   RelMdUtil.makeSemiJoinSelectivityRexNode(mq, rel);
 return NumberUtil.multiply(
   mq.getSelectivity(rel.getLeft(), semiJoinSelectivity),
   mq.getRowCount(rel.getLeft()));
}

public Double getSelectivity(SemiJoin rel, RelMetadataQuery mq,
  RexNode predicate) {
 // create a RexNode representing the selectivity of the
 // semijoin filter and pass it to getSelectivity
 RexBuilder rexBuilder = rel.getCluster().getRexBuilder();
 RexNode newPred = RelMdUtil.makeSemiJoinSelectivityRexNode(mq, rel);
 if (predicate != null) {
  newPred =
    rexBuilder.makeCall(
      SqlStdOperatorTable.AND,
      newPred,
      predicate);
 }
 return mq.getSelectivity(rel.getLeft(), newPred);
}

public Double getSelectivity(SemiJoin rel, RelMetadataQuery mq,
  RexNode predicate) {
 // create a RexNode representing the selectivity of the
 // semijoin filter and pass it to getSelectivity
 RexBuilder rexBuilder = rel.getCluster().getRexBuilder();
 RexNode newPred = RelMdUtil.makeSemiJoinSelectivityRexNode(mq, rel);
 if (predicate != null) {
  newPred =
    rexBuilder.makeCall(
      SqlStdOperatorTable.AND,
      newPred,
      predicate);
 }
 return mq.getSelectivity(rel.getLeft(), newPred);
}

public Double getDistinctRowCount(SemiJoin rel, RelMetadataQuery mq,
  ImmutableBitSet groupKey, RexNode predicate) {
 if (predicate == null || predicate.isAlwaysTrue()) {
  if (groupKey.isEmpty()) {
   return 1D;
  }
 }
 // create a RexNode representing the selectivity of the
 // semijoin filter and pass it to getDistinctRowCount
 RexNode newPred = RelMdUtil.makeSemiJoinSelectivityRexNode(mq, rel);
 if (predicate != null) {
  RexBuilder rexBuilder = rel.getCluster().getRexBuilder();
  newPred =
    rexBuilder.makeCall(
      SqlStdOperatorTable.AND,
      newPred,
      predicate);
 }
 return mq.getDistinctRowCount(rel.getLeft(), groupKey, newPred);
}

public Double getDistinctRowCount(SemiJoin rel, RelMetadataQuery mq,
  ImmutableBitSet groupKey, RexNode predicate) {
 if (predicate == null || predicate.isAlwaysTrue()) {
  if (groupKey.isEmpty()) {
   return 1D;
  }
 }
 // create a RexNode representing the selectivity of the
 // semijoin filter and pass it to getDistinctRowCount
 RexNode newPred = RelMdUtil.makeSemiJoinSelectivityRexNode(mq, rel);
 if (predicate != null) {
  RexBuilder rexBuilder = rel.getCluster().getRexBuilder();
  newPred =
    rexBuilder.makeCall(
      SqlStdOperatorTable.AND,
      newPred,
      predicate);
 }
 return mq.getDistinctRowCount(rel.getLeft(), groupKey, newPred);
}