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RelMdUtil.getSemiJoinRowCount
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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)

origin: Qihoo360/Quicksql

@Override public double estimateRowCount(RelMetadataQuery mq) {
 return Util.first(
   RelMdUtil.getSemiJoinRowCount(mq, left, right, joinType, condition),
   1D);
}
origin: org.apache.calcite/calcite-core

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

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.
  • capInfinity,
  • cardOfProjExpr,
  • checkInputForCollationAndLimit,
  • computeSemiJoinSelectivity,
  • getJoinPopulationSize,
  • getMinusRowCount,
  • getSelectivityValue,
  • getUnionAllRowCount,
  • makeSemiJoinSelectivityRexNode

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