本文整理汇总了Java中org.apache.calcite.plan.RelOptUtil.splitFilters方法的典型用法代码示例。如果您正苦于以下问题：Java RelOptUtil.splitFilters方法的具体用法？Java RelOptUtil.splitFilters怎么用？Java RelOptUtil.splitFilters使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类org.apache.calcite.plan.RelOptUtil的用法示例。
在下文中一共展示了RelOptUtil.splitFilters方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Java代码示例。
示例1: getSelectivity
import org.apache.calcite.plan.RelOptUtil; //导入方法依赖的package包/类
public Double getSelectivity(Aggregate rel, RelMetadataQuery mq,
RexNode predicate) {
final List<RexNode> notPushable = new ArrayList<>();
final List<RexNode> pushable = new ArrayList<>();
RelOptUtil.splitFilters(
rel.getGroupSet(),
predicate,
pushable,
notPushable);
final RexBuilder rexBuilder = rel.getCluster().getRexBuilder();
RexNode childPred =
RexUtil.composeConjunction(rexBuilder, pushable, true);
Double selectivity = mq.getSelectivity(rel.getInput(), childPred);
if (selectivity == null) {
return null;
} else {
RexNode pred =
RexUtil.composeConjunction(rexBuilder, notPushable, true);
return selectivity * RelMdUtil.guessSelectivity(pred);
}
}
示例2: getDistinctRowCount
import org.apache.calcite.plan.RelOptUtil; //导入方法依赖的package包/类
public Double getDistinctRowCount(Aggregate rel, RelMetadataQuery mq,
ImmutableBitSet groupKey, RexNode predicate) {
if (predicate == null || predicate.isAlwaysTrue()) {
if (groupKey.isEmpty()) {
return 1D;
}
}
// determine which predicates can be applied on the child of the
// aggregate
final List<RexNode> notPushable = new ArrayList<>();
final List<RexNode> pushable = new ArrayList<>();
RelOptUtil.splitFilters(
rel.getGroupSet(),
predicate,
pushable,
notPushable);
final RexBuilder rexBuilder = rel.getCluster().getRexBuilder();
RexNode childPreds =
RexUtil.composeConjunction(rexBuilder, pushable, true);
// set the bits as they correspond to the child input
ImmutableBitSet.Builder childKey = ImmutableBitSet.builder();
RelMdUtil.setAggChildKeys(groupKey, rel, childKey);
Double distinctRowCount =
mq.getDistinctRowCount(rel.getInput(), childKey.build(), childPreds);
if (distinctRowCount == null) {
return null;
} else if (notPushable.isEmpty()) {
return distinctRowCount;
} else {
RexNode preds =
RexUtil.composeConjunction(rexBuilder, notPushable, true);
return distinctRowCount * RelMdUtil.guessSelectivity(preds);
}
}