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rename RelNodeUtil to RelExplainUtil and do some refactor
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...le-planner-blink/src/main/scala/org/apache/flink/table/plan/nodes/common/CommonCalc.scala
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,97 @@ | ||
| /* | ||
| * Licensed to the Apache Software Foundation (ASF) under one | ||
| * or more contributor license agreements. See the NOTICE file | ||
| * 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:https://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, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
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| package org.apache.flink.table.plan.nodes.common | ||
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| import org.apache.flink.table.plan.nodes.ExpressionFormat.ExpressionFormat | ||
| import org.apache.flink.table.plan.nodes.{ExpressionFormat, FlinkRelNode} | ||
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| import org.apache.calcite.plan.{RelOptCluster, RelOptCost, RelOptPlanner, RelTraitSet} | ||
| import org.apache.calcite.rel.core.Calc | ||
| import org.apache.calcite.rel.metadata.RelMetadataQuery | ||
| import org.apache.calcite.rel.{RelNode, RelWriter} | ||
| import org.apache.calcite.rex.{RexCall, RexInputRef, RexLiteral, RexProgram} | ||
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| import scala.collection.JavaConversions._ | ||
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| /** | ||
| * Base class for flink [[Calc]]. | ||
| */ | ||
| abstract class CommonCalc( | ||
| cluster: RelOptCluster, | ||
| traitSet: RelTraitSet, | ||
| input: RelNode, | ||
| calcProgram: RexProgram) | ||
| extends Calc(cluster, traitSet, input, calcProgram) | ||
| with FlinkRelNode { | ||
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| override def computeSelfCost(planner: RelOptPlanner, mq: RelMetadataQuery): RelOptCost = { | ||
| val calcProgram = getProgram | ||
| // compute number of expressions that do not access a field or literal, i.e. computations, | ||
| // conditions, etc. We only want to account for computations, not for simple projections. | ||
| // CASTs in RexProgram are reduced as far as possible by ReduceExpressionsRule | ||
| // in normalization stage. So we should ignore CASTs here in optimization stage. | ||
| val compCnt = calcProgram.getProjectList.map(calcProgram.expandLocalRef).toList.count { | ||
| case _: RexInputRef => false | ||
| case _: RexLiteral => false | ||
| case c: RexCall if c.getOperator.getName.equals("CAST") => false | ||
| case _ => true | ||
| } | ||
| val newRowCnt = mq.getRowCount(this) | ||
| // TODO use inputRowCnt to compute cpu cost | ||
| planner.getCostFactory.makeCost(newRowCnt, newRowCnt * compCnt, 0) | ||
| } | ||
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| override def explainTerms(pw: RelWriter): RelWriter = { | ||
| pw.input("input", getInput) | ||
| .item("select", projectionToString()) | ||
| .itemIf("where", conditionToString(), calcProgram.getCondition != null) | ||
| } | ||
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| protected def conditionToString(): String = { | ||
| val cond = calcProgram.getCondition | ||
| val inputFieldNames = calcProgram.getInputRowType.getFieldNames.toList | ||
| val localExprs = calcProgram.getExprList.toList | ||
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| if (cond != null) { | ||
| getExpressionString(cond, inputFieldNames, Some(localExprs)) | ||
| } else { | ||
| "" | ||
| } | ||
| } | ||
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| protected def projectionToString( | ||
| expressionFormat: ExpressionFormat = ExpressionFormat.Prefix): String = { | ||
| val projectList = calcProgram.getProjectList.toList | ||
| val inputFieldNames = calcProgram.getInputRowType.getFieldNames.toList | ||
| val localExprs = calcProgram.getExprList.toList | ||
| val outputFieldNames = calcProgram.getOutputRowType.getFieldNames.toList | ||
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| projectList | ||
| .map(getExpressionString(_, inputFieldNames, Some(localExprs), expressionFormat)) | ||
| .zip(outputFieldNames).map { case (e, o) => | ||
| if (e != o) { | ||
| e + " AS " + o | ||
| } else { | ||
| e | ||
| } | ||
| }.mkString(", ") | ||
| } | ||
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| } |
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