本文整理汇总了Java中org.apache.calcite.plan.RelOptPredicateList.of方法的典型用法代码示例。如果您正苦于以下问题：Java RelOptPredicateList.of方法的具体用法？Java RelOptPredicateList.of怎么用？Java RelOptPredicateList.of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.RelOptPredicateList的用法示例。
在下文中一共展示了RelOptPredicateList.of方法的1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: getPredicates
import org.apache.calcite.plan.RelOptPredicateList; //导入方法依赖的package包/类
/**
* Infers predicates for an Aggregate.
*
* <p>Pulls up predicates that only contains references to columns in the
* GroupSet. For e.g.
*
* <blockquote><pre>
* inputPullUpExprs : { a > 7, b + c < 10, a + e = 9}
* groupSet : { a, b}
* pulledUpExprs : { a > 7}
* </pre></blockquote>
*/
public RelOptPredicateList getPredicates(Aggregate agg, RelMetadataQuery mq) {
final RelNode input = agg.getInput();
final RexBuilder rexBuilder = agg.getCluster().getRexBuilder();
final RelOptPredicateList inputInfo = mq.getPulledUpPredicates(input);
final List<RexNode> aggPullUpPredicates = new ArrayList<>();
ImmutableBitSet groupKeys = agg.getGroupSet();
if (groupKeys.isEmpty()) {
// "GROUP BY ()" can convert an empty relation to a non-empty relation, so
// it is not valid to pull up predicates. In particular, consider the
// predicate "false": it is valid on all input rows (trivially - there are
// no rows!) but not on the output (there is one row).
return RelOptPredicateList.EMPTY;
}
Mapping m = Mappings.create(MappingType.PARTIAL_FUNCTION,
input.getRowType().getFieldCount(), agg.getRowType().getFieldCount());
int i = 0;
for (int j : groupKeys) {
m.set(j, i++);
}
for (RexNode r : inputInfo.pulledUpPredicates) {
ImmutableBitSet rCols = RelOptUtil.InputFinder.bits(r);
if (groupKeys.contains(rCols)) {
r = r.accept(new RexPermuteInputsShuttle(m, input));
aggPullUpPredicates.add(r);
}
}
return RelOptPredicateList.of(rexBuilder, aggPullUpPredicates);
}