How to use
checkInputForCollationAndLimit
method
in
org.apache.calcite.rel.metadata.RelMdUtil

Best Java code snippets using org.apache.calcite.rel.metadata.RelMdUtil.checkInputForCollationAndLimit (Showing top 4 results out of 315)

final RelMetadataQuery mq = call.getMetadataQuery();
for (RelNode input : union.getInputs()) {
 if (!RelMdUtil.checkInputForCollationAndLimit(mq, input,
   sort.getCollation(), sort.offset, sort.fetch)) {
  ret = false;

final RelMetadataQuery mq = call.getMetadataQuery();
for (RelNode input : union.getInputs()) {
 if (!RelMdUtil.checkInputForCollationAndLimit(mq, input,
   sort.getCollation(), sort.offset, sort.fetch)) {
  ret = false;

if (RelMdUtil.checkInputForCollationAndLimit(mq, join.getLeft(),
  sort.getCollation(), sort.offset, sort.fetch)) {
 return;
if (RelMdUtil.checkInputForCollationAndLimit(mq, join.getRight(),
  rightCollation, sort.offset, sort.fetch)) {
 return;

if (RelMdUtil.checkInputForCollationAndLimit(mq, join.getLeft(),
  sort.getCollation(), sort.offset, sort.fetch)) {
 return;
if (RelMdUtil.checkInputForCollationAndLimit(mq, join.getRight(),
  rightCollation, sort.offset, sort.fetch)) {
 return;

Javadoc

Returns whether a relational expression is already sorted and has fewer rows than the sum of offset and limit.

If this is the case, it is safe to push down a org.apache.calcite.rel.core.Sort with limit and optional offset.

Popular methods of RelMdUtil

guessSelectivity
Returns default estimates for selectivities, in the absence of stats.
areColumnsDefinitelyUnique
Returns true if the columns represented in a bit mask are definitely known to form a unique column s
areColumnsDefinitelyUniqueWhenNullsFiltered
Returns true if the columns represented in a bit mask are definitely known to form a unique column s
getJoinDistinctRowCount
Computes the number of distinct rows for a set of keys returned from a join. Also known as NDV (numb
minusPreds
Takes the difference between two predicates, removing from the first any predicates also in the seco
estimateFilteredRows
linear
Returns a point on a line.The result is always a value between minY and maxY, even if x is not betwe
getJoinRowCount
Returns an estimate of the number of rows returned by a Join.
areColumnsUnique
areColumnsUniqueWhenNullsFiltered
capInfinity
Caps a double value at Double.MAX_VALUE if it's currently infinity
cardOfProjExpr
Computes the cardinality of a particular expression from the projection list.

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How to use checkInputForCollationAndLimitmethodin org.apache.calcite.rel.metadata.RelMdUtil

Best Java code snippets using org.apache.calcite.rel.metadata.RelMdUtil.checkInputForCollationAndLimit (Showing top 4 results out of 315)

How to use
checkInputForCollationAndLimit
method
in
org.apache.calcite.rel.metadata.RelMdUtil