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[feat](mtmv)Unified external table interface supporting partition ref…
…resh and partition pruning (#44673) ### What problem does this PR solve? - Add `MvccTable` to represent a table that supports querying specified version data - Add the `MvccSnapshot` interface to store snapshot information of mvcc at a certain moment in time - Add the `MvccSnapshot` parameter to the method of the `MTMVRelatedTableIf `interface to retrieve data of a specified version - Partition pruning related methods combined with the `MvccSnapshot` parameter are used to obtain partition information for a specified version - Load the snapshot information of mvccTable at the beginning of the query plan and store it in StatementContext ### Release note Unified external table interface supporting partition refresh and partition pruning
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fe/fe-core/src/main/java/org/apache/doris/datasource/mvcc/MvccSnapshot.java
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| // 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.doris.datasource.mvcc; | ||
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| /** | ||
| * The snapshot information of mvcc is defined by each table, | ||
| * but it should be ensured that the table information queried through this snapshot remains unchanged | ||
| */ | ||
| public interface MvccSnapshot { | ||
| } |
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fe/fe-core/src/main/java/org/apache/doris/datasource/mvcc/MvccTable.java
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| // 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.doris.datasource.mvcc; | ||
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| import org.apache.doris.catalog.TableIf; | ||
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| /** | ||
| * The table that needs to query data based on the version needs to implement this interface. | ||
| */ | ||
| public interface MvccTable extends TableIf { | ||
| /** | ||
| * Retrieve the current snapshot information of the table, | ||
| * and the returned result will be used for the entire process of this query | ||
| * | ||
| * @return MvccSnapshot | ||
| */ | ||
| MvccSnapshot loadSnapshot(); | ||
| } |
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