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https://issues.apache.org/jira/browse/HUDI-2268?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17398851#comment-17398851
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ASF GitHub Bot commented on HUDI-2268:
--------------------------------------
nsivabalan commented on a change in pull request #3470:
URL: https://github.com/apache/hudi/pull/3470#discussion_r688703422
##########
File path:
hudi-client/hudi-spark-client/src/main/java/org/apache/hudi/table/upgrade/OneToTwoUpgradeHandler.java
##########
@@ -0,0 +1,60 @@
+/*
+ * 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.hudi.table.upgrade;
+
+import org.apache.hudi.HoodieSparkWriterUtils;
+import org.apache.hudi.common.engine.HoodieEngineContext;
+import org.apache.hudi.common.table.HoodieTableConfig;
+import org.apache.hudi.common.table.HoodieTableMetaClient;
+import org.apache.hudi.common.table.timeline.versioning.TimelineLayoutVersion;
+import org.apache.hudi.common.util.Option;
+import org.apache.hudi.config.HoodieWriteConfig;
+import org.apache.hudi.exception.HoodieIOException;
+import org.apache.hudi.keygen.constant.KeyGeneratorOptions;
+
+import org.apache.hadoop.fs.FSDataOutputStream;
+import org.apache.hadoop.fs.Path;
+
+import java.io.IOException;
+
+/**
+ * Upgrade handle to assist in upgrading hoodie table from version 1 to 2.
+ */
+public class OneToTwoUpgradeHandler implements UpgradeHandler {
+
+ @Override
+ public void upgrade(HoodieWriteConfig config, HoodieEngineContext context,
String instantTime) {
+ HoodieTableMetaClient metaClient =
HoodieTableMetaClient.builder().setConf(context.getHadoopConf().get()).setBasePath(config.getBasePath())
+ .setLayoutVersion(Option.of(new
TimelineLayoutVersion(config.getTimelineLayoutVersion()))).build();
+ HoodieTableConfig tableConfig = metaClient.getTableConfig();
+ tableConfig.setValue(HoodieTableConfig.HOODIE_TABLE_NAME_PROP,
config.getTableName());
+ tableConfig.setValue(HoodieTableConfig.HOODIE_TABLE_PARTITION_FIELDS_PROP,
HoodieSparkWriterUtils.getPartitionColumns(config.getProps()));
+ tableConfig.setValue(HoodieTableConfig.HOODIE_TABLE_RECORDKEY_FIELDS,
config.getString(KeyGeneratorOptions.RECORDKEY_FIELD.key()));
+ tableConfig.setValue(HoodieTableConfig.HOODIE_BASE_FILE_FORMAT_PROP,
config.getString(HoodieTableConfig.HOODIE_BASE_FILE_FORMAT_PROP));
+
+ // serialize the updated properties
+ // since the metaclient object is not shared between
AbstractUpgradeDownGrade, we have to serialize the properties here
+ Path propertyFile = new Path(metaClient.getMetaPath() + "/" +
HoodieTableConfig.HOODIE_PROPERTIES_FILE);
Review comment:
@vinothchandar : I assume here also we should take into consideration of
partial write failures. And so, we need to write to some temp file and then do
atomic rename?
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> Upgrade hoodie table to 0.9.0
> -----------------------------
>
> Key: HUDI-2268
> URL: https://issues.apache.org/jira/browse/HUDI-2268
> Project: Apache Hudi
> Issue Type: Sub-task
> Components: Usability
> Reporter: sivabalan narayanan
> Assignee: sivabalan narayanan
> Priority: Major
> Labels: pull-request-available
> Fix For: 0.9.0
>
>
> Wrt upgrading/downgrading hoodie.properties, here is what we can go.
> Add a new table version, 2.
> Add an upgrade step:
> before every write operation.
> Check if existing hoodie.props is in an older version. If yes, perform
> upgrade step to version2 (either from 0 to 2 or from 1 to 2). This
> essentially means that we need to add new properties pertaining to sql dml to
> hoodie.properties.
> Things to watch out for:
> for some operations, not all props might be set by the user. So, we might
> need to throw an exception. (record key field, partition path field, key gen
> prop, precombine field).
> We need to fetch latest table schema since the incoming df could have partial
> cols.
>
> Downgrade step:
> hoodie.properties will have some additional properties. Should not cause any
> harm. All we need to do is to downgrade the table version to target version
> and not touch any of the props.
>
>
>
>
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