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[FLINK-12248][table-planner-blink] Support e2e over window in blink b…
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...ala/org/apache/flink/table/codegen/over/MultiFieldRangeBoundComparatorCodeGenerator.scala
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,84 @@ | ||
| /* | ||
| * 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://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. | ||
| */ | ||
|
|
||
| package org.apache.flink.table.codegen.over | ||
|
|
||
| import org.apache.flink.table.`type`.{InternalType, RowType} | ||
| import org.apache.flink.table.api.TableConfig | ||
| import org.apache.flink.table.codegen.CodeGenUtils.{BASE_ROW, newName} | ||
| import org.apache.flink.table.codegen.Indenter.toISC | ||
| import org.apache.flink.table.codegen.{CodeGenUtils, CodeGeneratorContext, GenerateUtils} | ||
| import org.apache.flink.table.generated.{GeneratedRecordComparator, RecordComparator} | ||
|
|
||
| /** | ||
| * RANGE allow the compound ORDER BY and the random type when the bound is current row. | ||
| */ | ||
| class MultiFieldRangeBoundComparatorCodeGenerator( | ||
| conf: TableConfig, | ||
| inType: RowType, | ||
| keys: Array[Int], | ||
| keyTypes: Array[InternalType], | ||
| keyOrders: Array[Boolean], | ||
| nullsIsLasts: Array[Boolean], | ||
| isLowerBound: Boolean = true) { | ||
|
|
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| def generateBoundComparator(name: String): GeneratedRecordComparator = { | ||
| val className = newName(name) | ||
| val input = CodeGenUtils.DEFAULT_INPUT1_TERM | ||
| val current = CodeGenUtils.DEFAULT_INPUT2_TERM | ||
|
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| // In order to avoid the loss of precision in long cast to int. | ||
| def generateReturnCode(comp: String): String = { | ||
| if (isLowerBound) s"return $comp >= 0 ? 1 : -1;" else s"return $comp > 0 ? 1 : -1;" | ||
| } | ||
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| val ctx = CodeGeneratorContext(conf) | ||
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| val compareCode = GenerateUtils.generateRowCompare( | ||
| ctx, keys, keyTypes, keyOrders, nullsIsLasts, input, current) | ||
|
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| val code = | ||
| j""" | ||
| public class $className implements ${classOf[RecordComparator].getCanonicalName} { | ||
|
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| private final Object[] references; | ||
| ${ctx.reuseMemberCode()} | ||
|
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| public $className(Object[] references) { | ||
| this.references = references; | ||
| ${ctx.reuseInitCode()} | ||
| ${ctx.reuseOpenCode()} | ||
| } | ||
|
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| @Override | ||
| public int compare($BASE_ROW $input, $BASE_ROW $current) { | ||
| int ret = compareInternal($input, $current); | ||
| ${generateReturnCode("ret")} | ||
| } | ||
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| private int compareInternal($BASE_ROW $input, $BASE_ROW $current) { | ||
| $compareCode | ||
| return 0; | ||
| } | ||
|
|
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| } | ||
| """.stripMargin | ||
| new GeneratedRecordComparator(className, code, ctx.references.toArray) | ||
| } | ||
| } | ||
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