Examples of org.eigenbase.rel.WindowRel

org.eigenbase.rel.WindowRel

A relational expression representing a set of window aggregates.

A window rel can handle several window aggregate functions, over several partitions, with pre- and post-expressions, and an optional post-filter. Each of the partitions is defined by a partition key (zero or more columns) and a range (logical or physical). The partitions expect the data to be sorted correctly on input to the relational expression.

Each {@link org.eigenbase.rel.WindowRelBase.Window} has a set of{@link org.eigenbase.rex.RexOver} objects.

Created by {@link org.eigenbase.rel.rules.WindowedAggSplitterRule}.

    super(RelOptHelper.some(WindowRel.class, Convention.NONE, RelOptHelper.any(RelNode.class)), "DrillWindowRule");
  }


  @Override
  public void onMatch(RelOptRuleCall call) {
    final WindowRel window = call.rel(0);
    final RelNode input = call.rel(1);
    final RelTraitSet traits = window.getTraitSet().plus(DrillRel.DRILL_LOGICAL);
    final RelNode convertedInput = convert(input, traits);
    call.transformTo(
        new DrillWindowRel(
            window.getCluster(),
            traits,
            convertedInput,
            Lists.<RexLiteral>newArrayList(),
            window.getRowType(),
            window.windows));
  }

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Examples of org.eigenbase.rel.WindowRel

Related Classes of org.eigenbase.rel.WindowRel