org.apache.flink.table.planner.plan.rules.physical.batch.BatchPhysicalPythonCorrelateRule Maven / Gradle / Ivy
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* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
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* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.flink.table.planner.plan.rules.physical.batch;
import org.apache.flink.table.planner.plan.nodes.FlinkConventions;
import org.apache.flink.table.planner.plan.nodes.logical.FlinkLogicalCalc;
import org.apache.flink.table.planner.plan.nodes.logical.FlinkLogicalCorrelate;
import org.apache.flink.table.planner.plan.nodes.logical.FlinkLogicalTableFunctionScan;
import org.apache.flink.table.planner.plan.nodes.physical.batch.BatchPhysicalPythonCorrelate;
import org.apache.flink.table.planner.plan.utils.PythonUtil;
import org.apache.calcite.plan.RelOptRule;
import org.apache.calcite.plan.RelOptRuleCall;
import org.apache.calcite.plan.RelTraitSet;
import org.apache.calcite.plan.volcano.RelSubset;
import org.apache.calcite.rel.RelNode;
import org.apache.calcite.rel.convert.ConverterRule;
import org.apache.calcite.rex.RexNode;
import scala.Option;
import scala.Some;
/**
* The physical rule is responsible for convert {@link FlinkLogicalCorrelate} to {@link
* BatchPhysicalPythonCorrelate}.
*/
public class BatchPhysicalPythonCorrelateRule extends ConverterRule {
public static final RelOptRule INSTANCE = new BatchPhysicalPythonCorrelateRule();
private BatchPhysicalPythonCorrelateRule() {
super(
FlinkLogicalCorrelate.class,
FlinkConventions.LOGICAL(),
FlinkConventions.BATCH_PHYSICAL(),
"BatchPhysicalPythonCorrelateRule");
}
@Override
public boolean matches(RelOptRuleCall call) {
FlinkLogicalCorrelate join = call.rel(0);
RelNode right = ((RelSubset) join.getRight()).getOriginal();
if (right instanceof FlinkLogicalTableFunctionScan) {
// right node is a table function
FlinkLogicalTableFunctionScan scan = (FlinkLogicalTableFunctionScan) right;
// return true if the table function is python table function
return PythonUtil.isPythonCall(scan.getCall(), null);
} else if (right instanceof FlinkLogicalCalc) {
// a filter is pushed above the table function
FlinkLogicalCalc calc = (FlinkLogicalCalc) right;
RelNode input = ((RelSubset) calc.getInput()).getOriginal();
if (input instanceof FlinkLogicalTableFunctionScan) {
FlinkLogicalTableFunctionScan scan = (FlinkLogicalTableFunctionScan) input;
// return true if the table function is python table function
return PythonUtil.isPythonCall(scan.getCall(), null);
}
}
return false;
}
@Override
public RelNode convert(RelNode relNode) {
BatchExecPythonCorrelateFactory factory = new BatchExecPythonCorrelateFactory(relNode);
return factory.convertToCorrelate();
}
/** The factory is responsible for creating {@link BatchPhysicalPythonCorrelate}. */
private static class BatchExecPythonCorrelateFactory {
private final FlinkLogicalCorrelate correlate;
private final RelTraitSet traitSet;
private final RelNode convInput;
private final RelNode right;
BatchExecPythonCorrelateFactory(RelNode rel) {
this.correlate = (FlinkLogicalCorrelate) rel;
this.traitSet = rel.getTraitSet().replace(FlinkConventions.BATCH_PHYSICAL());
this.convInput =
RelOptRule.convert(correlate.getInput(0), FlinkConventions.BATCH_PHYSICAL());
this.right = correlate.getInput(1);
}
BatchPhysicalPythonCorrelate convertToCorrelate() {
return convertToCorrelate(right, Option.empty());
}
private BatchPhysicalPythonCorrelate convertToCorrelate(
RelNode relNode, Option condition) {
if (relNode instanceof RelSubset) {
RelSubset rel = (RelSubset) relNode;
return convertToCorrelate(rel.getRelList().get(0), condition);
} else if (relNode instanceof FlinkLogicalCalc) {
FlinkLogicalCalc calc = (FlinkLogicalCalc) relNode;
return convertToCorrelate(
((RelSubset) calc.getInput()).getOriginal(),
Some.apply(
calc.getProgram()
.expandLocalRef(calc.getProgram().getCondition())));
} else {
FlinkLogicalTableFunctionScan scan = (FlinkLogicalTableFunctionScan) relNode;
return new BatchPhysicalPythonCorrelate(
correlate.getCluster(),
traitSet,
convInput,
scan,
condition,
correlate.getRowType(),
correlate.getJoinType());
}
}
}
}