Java LogicalFilter.getInput方法代码示例

import org.apache.calcite.rel.logical.LogicalFilter; //导入方法依赖的package包/类
@Override
public void onMatch(RelOptRuleCall call) {
  final LogicalFilter filter = (LogicalFilter) call.rel(0);
  final RelNode input = filter.getInput();
  //final RelTraitSet traits = filter.getTraitSet().plus(DrillRel.DRILL_LOGICAL);
  final RelNode convertedInput = convert(input, input.getTraitSet().plus(DrillRel.DRILL_LOGICAL));
  call.transformTo(new DrillFilterRel(filter.getCluster(), convertedInput.getTraitSet(), convertedInput, filter.getCondition()));
}
 

import org.apache.calcite.rel.logical.LogicalFilter; //导入方法依赖的package包/类
@Override
public void onMatch(RelOptRuleCall call) {
  final LogicalFilter filter = (LogicalFilter) call.rel(0);
  final RelNode input = filter.getInput();
  //final RelTraitSet traits = filter.getTraitSet().plus(Rel.LOGICAL);
  final RelNode convertedInput = convert(input, input.getTraitSet().plus(Rel.LOGICAL).simplify());
  call.transformTo(new FilterRel(filter.getCluster(), convertedInput.getTraitSet(), convertedInput, filter.getCondition()));
}
 

import org.apache.calcite.rel.logical.LogicalFilter; //导入方法依赖的package包/类
/**
 * Rewrite LogicalFilter.
 *
 * @param rel the filter rel to rewrite
 */
public Frame decorrelateRel(LogicalFilter rel) {
	//
	// Rewrite logic:
	//
	// 1. If a LogicalFilter references a correlated field in its filter
	// condition, rewrite the LogicalFilter to be
	//   LogicalFilter
	//     LogicalJoin(cross product)
	//       OriginalFilterInput
	//       ValueGenerator(produces distinct sets of correlated variables)
	// and rewrite the correlated fieldAccess in the filter condition to
	// reference the LogicalJoin output.
	//
	// 2. If LogicalFilter does not reference correlated variables, simply
	// rewrite the filter condition using new input.
	//

	final RelNode oldInput = rel.getInput();
	Frame frame = getInvoke(oldInput, rel);
	if (frame == null) {
		// If input has not been rewritten, do not rewrite this rel.
		return null;
	}

	// If this LogicalFilter has correlated reference, create value generator
	// and produce the correlated variables in the new output.
	if (cm.mapRefRelToCorVar.containsKey(rel)) {
		decorrelateInputWithValueGenerator(rel);

		// The old input should be mapped to the newly created LogicalJoin by
		// rewriteInputWithValueGenerator().
		frame = map.get(oldInput);
	}

	// Replace the filter expression to reference output of the join
	// Map filter to the new filter over join
	RelNode newFilter = RelOptUtil.createFilter(frame.r, decorrelateExpr(rel.getCondition()));

	// Filter does not change the input ordering.
	// Filter rel does not permute the input.
	// All corvars produced by filter will have the same output positions in the
	// input rel.
	return register(rel, newFilter, frame.oldToNewOutputPos, frame.corVarOutputPos);
}
 

import org.apache.calcite.rel.logical.LogicalFilter; //导入方法依赖的package包/类
/**
 * Rewrite LogicalFilter.
 *
 * @param rel the filter rel to rewrite
 */
public Frame decorrelateRel(LogicalFilter rel) {
  //
  // Rewrite logic:
  //
  // 1. If a Filter references a correlated field in its filter
  // condition, rewrite the Filter to be
  //   Filter
  //     Join(cross product)
  //       originalFilterInput
  //       ValueGenerator(produces distinct sets of correlated variables)
  // and rewrite the correlated fieldAccess in the filter condition to
  // reference the Join output.
  //
  // 2. If Filter does not reference correlated variables, simply
  // rewrite the filter condition using new input.
  //

  final RelNode oldInput = rel.getInput();
  Frame frame = getInvoke(oldInput, rel);
  if (frame == null) {
    // If input has not been rewritten, do not rewrite this rel.
    return null;
  }

  // If this Filter has correlated reference, create value generator
  // and produce the correlated variables in the new output.
  if (false) {
    if (cm.mapRefRelToCorRef.containsKey(rel)) {
      frame = decorrelateInputWithValueGenerator(rel, frame);
    }
  } else {
    frame = maybeAddValueGenerator(rel, frame);
  }

  final CorelMap cm2 = new CorelMapBuilder().build(rel);

  // Replace the filter expression to reference output of the join
  // Map filter to the new filter over join
  relBuilder.push(frame.r)
      .filter(decorrelateExpr(currentRel, map, cm2, rel.getCondition()));

  // Filter does not change the input ordering.
  // Filter rel does not permute the input.
  // All corVars produced by filter will have the same output positions in the
  // input rel.
  return register(rel, relBuilder.build(), frame.oldToNewOutputs,
      frame.corDefOutputs);
}