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

Best Java code snippets using org.apache.calcite.rel.metadata.RelMdUtil.getSemiJoinRowCount (Showing top 2 results out of 315)

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@Override public double estimateRowCount(RelMetadataQuery mq) {
 return Util.first(
   RelMdUtil.getSemiJoinRowCount(mq, left, right, joinType, condition),
   1D);
}

@Override public double estimateRowCount(RelMetadataQuery mq) {
 return Util.first(
   RelMdUtil.getSemiJoinRowCount(mq, left, right, joinType, condition),
   1D);
}

Javadoc

Returns an estimate of the number of rows returned by a SemiJoin.

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 getSemiJoinRowCountmethodin org.apache.calcite.rel.metadata.RelMdUtil

Best Java code snippets using org.apache.calcite.rel.metadata.RelMdUtil.getSemiJoinRowCount (Showing top 2 results out of 315)

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