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[FLINK-35243][base] Support more schema change events & PreSchema bac…
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...k-cdc-common/src/main/java/org/apache/flink/cdc/common/event/AlterColumnCommentEvent.java
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,143 @@ | ||
| /* | ||
| * 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. | ||
| */ | ||
|
|
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| package org.apache.flink.cdc.common.event; | ||
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| import org.apache.flink.cdc.common.schema.Schema; | ||
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| import java.util.HashMap; | ||
| import java.util.Map; | ||
| import java.util.Objects; | ||
| import java.util.Set; | ||
| import java.util.stream.Collectors; | ||
|
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| /** | ||
| * A {@link SchemaChangeEvent} that represents an {@code ALTER COLUMN} DDL, which may contain the | ||
| * comment changes. | ||
| */ | ||
| public class AlterColumnCommentEvent implements SchemaChangeEventWithPreSchema { | ||
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| private static final long serialVersionUID = 1L; | ||
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| private final TableId tableId; | ||
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| /** key => column name, value => column type after changing. */ | ||
| private final Map<String, String> commentMapping; | ||
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| private final Map<String, String> oldCommentMapping; | ||
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| public AlterColumnCommentEvent(TableId tableId, Map<String, String> commentMapping) { | ||
| this.tableId = tableId; | ||
| this.commentMapping = commentMapping; | ||
| this.oldCommentMapping = new HashMap<>(); | ||
| } | ||
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| public AlterColumnCommentEvent( | ||
| TableId tableId, | ||
| Map<String, String> commentMapping, | ||
| Map<String, String> oldCommentMapping) { | ||
| this.tableId = tableId; | ||
| this.commentMapping = commentMapping; | ||
| this.oldCommentMapping = oldCommentMapping; | ||
| } | ||
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| /** Returns the type mapping. */ | ||
| public Map<String, String> getCommentMapping() { | ||
| return commentMapping; | ||
| } | ||
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| public Map<String, String> getOldCommentMapping() { | ||
| return oldCommentMapping; | ||
| } | ||
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| @Override | ||
| public boolean equals(Object o) { | ||
| if (this == o) { | ||
| return true; | ||
| } | ||
| if (!(o instanceof AlterColumnCommentEvent)) { | ||
| return false; | ||
| } | ||
| AlterColumnCommentEvent that = (AlterColumnCommentEvent) o; | ||
| return Objects.equals(tableId, that.tableId) | ||
| && Objects.equals(commentMapping, that.commentMapping) | ||
| && Objects.equals(oldCommentMapping, that.oldCommentMapping); | ||
| } | ||
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| @Override | ||
| public int hashCode() { | ||
| return Objects.hash(tableId, commentMapping, oldCommentMapping); | ||
| } | ||
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| @Override | ||
| public String toString() { | ||
| if (hasPreSchema()) { | ||
| return "AlterColumnCommentEvent{" | ||
| + "tableId=" | ||
| + tableId | ||
| + ", commentMapping=" | ||
| + commentMapping | ||
| + ", oldCommentMapping=" | ||
| + oldCommentMapping | ||
| + '}'; | ||
| } else { | ||
| return "AlterColumnCommentEvent{" | ||
| + "tableId=" | ||
| + tableId | ||
| + ", commentMapping=" | ||
| + commentMapping | ||
| + '}'; | ||
| } | ||
| } | ||
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| @Override | ||
| public TableId tableId() { | ||
| return tableId; | ||
| } | ||
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| @Override | ||
| public boolean hasPreSchema() { | ||
| return !oldCommentMapping.isEmpty(); | ||
| } | ||
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| @Override | ||
| public void fillPreSchema(Schema oldTypeSchema) { | ||
| oldCommentMapping.clear(); | ||
| oldTypeSchema.getColumns().stream() | ||
| .filter(e -> commentMapping.containsKey(e.getName())) | ||
| .forEach(e -> oldCommentMapping.put(e.getName(), e.getComment())); | ||
| } | ||
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| @Override | ||
| public boolean trimRedundantChanges() { | ||
| if (hasPreSchema()) { | ||
| Set<String> redundantlyChangedColumns = | ||
| commentMapping.keySet().stream() | ||
| .filter( | ||
| e -> | ||
| Objects.equals( | ||
| commentMapping.get(e), | ||
| oldCommentMapping.get(e))) | ||
| .collect(Collectors.toSet()); | ||
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| // Remove redundant alter column type records that doesn't really change the type | ||
| commentMapping.keySet().removeAll(redundantlyChangedColumns); | ||
| oldCommentMapping.keySet().removeAll(redundantlyChangedColumns); | ||
| } | ||
| return !commentMapping.isEmpty(); | ||
| } | ||
| } |
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72
flink-cdc-common/src/main/java/org/apache/flink/cdc/common/event/AlterTableCommentEvent.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,72 @@ | ||
| /* | ||
| * 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. | ||
| */ | ||
|
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| package org.apache.flink.cdc.common.event; | ||
|
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| import java.util.Objects; | ||
|
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| /** A {@link SchemaChangeEvent} that represents an {@code ALTER TABLE COMMENT = ...} DDL. */ | ||
| public class AlterTableCommentEvent implements SchemaChangeEvent { | ||
| private static final long serialVersionUID = 1L; | ||
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| private final TableId tableId; | ||
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| /** key => column name, value => column type after changing. */ | ||
| private final String tableComment; | ||
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| public AlterTableCommentEvent(TableId tableId, String tableComment) { | ||
| this.tableId = tableId; | ||
| this.tableComment = tableComment; | ||
| } | ||
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| public String getTableComment() { | ||
| return tableComment; | ||
| } | ||
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| @Override | ||
| public boolean equals(Object o) { | ||
| if (this == o) { | ||
| return true; | ||
| } | ||
| if (!(o instanceof AlterTableCommentEvent)) { | ||
| return false; | ||
| } | ||
| AlterTableCommentEvent that = (AlterTableCommentEvent) o; | ||
| return Objects.equals(tableId, that.tableId) | ||
| && Objects.equals(tableComment, that.tableComment); | ||
| } | ||
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| @Override | ||
| public int hashCode() { | ||
| return Objects.hash(tableId, tableComment); | ||
| } | ||
|
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| @Override | ||
| public String toString() { | ||
| return "AlterTableCommentEvent{" | ||
| + "tableId=" | ||
| + tableId | ||
| + ", tableComment=" | ||
| + tableComment | ||
| + '}'; | ||
| } | ||
|
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| @Override | ||
| public TableId tableId() { | ||
| return tableId; | ||
| } | ||
| } |
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