[feat](mtmv)mtmv support paimon partition refresh

fe/fe-core/src/main/java/org/apache/doris/datasource/paimon/PaimonExternalTable.java

@@ -18,10 +18,22 @@
 package org.apache.doris.datasource.paimon;
 
 import org.apache.doris.catalog.Column;
+import org.apache.doris.catalog.Env;
+import org.apache.doris.catalog.MTMV;
+import org.apache.doris.catalog.PartitionItem;
+import org.apache.doris.catalog.PartitionType;
 import org.apache.doris.catalog.ScalarType;
 import org.apache.doris.catalog.Type;
+import org.apache.doris.common.AnalysisException;
+import org.apache.doris.common.DdlException;
 import org.apache.doris.datasource.ExternalTable;
 import org.apache.doris.datasource.SchemaCacheValue;
+import org.apache.doris.mtmv.MTMVBaseTableIf;
+import org.apache.doris.mtmv.MTMVRefreshContext;
+import org.apache.doris.mtmv.MTMVRelatedTableIf;
+import org.apache.doris.mtmv.MTMVSnapshotIf;
+import org.apache.doris.mtmv.MTMVTimestampSnapshot;
+import org.apache.doris.mtmv.MTMVVersionSnapshot;
 import org.apache.doris.statistics.AnalysisInfo;
 import org.apache.doris.statistics.BaseAnalysisTask;
 import org.apache.doris.statistics.ExternalAnalysisTask;
@@ -30,25 +42,35 @@
 import org.apache.doris.thrift.TTableType;
 
 import com.google.common.collect.Lists;
+import com.google.common.collect.Maps;
+import com.google.common.collect.Sets;
+import org.apache.commons.collections.CollectionUtils;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
+import org.apache.paimon.catalog.Catalog;
+import org.apache.paimon.data.InternalRow;
 import org.apache.paimon.schema.TableSchema;
 import org.apache.paimon.table.FileStoreTable;
 import org.apache.paimon.table.Table;
 import org.apache.paimon.table.source.Split;
+import org.apache.paimon.table.system.PartitionsTable;
+import org.apache.paimon.table.system.SnapshotsTable;
 import org.apache.paimon.types.ArrayType;
 import org.apache.paimon.types.DataField;
 import org.apache.paimon.types.DecimalType;
 import org.apache.paimon.types.MapType;
 import org.apache.paimon.types.RowType;
 
+import java.io.IOException;
 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
+import java.util.Map;
 import java.util.Optional;
+import java.util.Set;
 import java.util.stream.Collectors;
 
-public class PaimonExternalTable extends ExternalTable {
+public class PaimonExternalTable extends ExternalTable implements MTMVRelatedTableIf, MTMVBaseTableIf {
 
     private static final Logger LOG = LogManager.getLogger(PaimonExternalTable.class);
 
@@ -73,18 +95,95 @@ public Table getPaimonTable() {
         return schemaCacheValue.map(value -> ((PaimonSchemaCacheValue) value).getPaimonTable()).orElse(null);
     }
 
+    private PaimonPartitionInfo getPartitionInfoFromCache() {
+        makeSureInitialized();
+        Optional<SchemaCacheValue> schemaCacheValue = getSchemaCacheValue();
+        if (!schemaCacheValue.isPresent()) {
+            return new PaimonPartitionInfo();
+        }
+        return ((PaimonSchemaCacheValue) schemaCacheValue.get()).getPartitionInfo();
+    }
+
+    private List<Column> getPartitionColumnsFromCache() {
+        makeSureInitialized();
+        Optional<SchemaCacheValue> schemaCacheValue = getSchemaCacheValue();
+        if (!schemaCacheValue.isPresent()) {
+            return Lists.newArrayList();
+        }
+        return ((PaimonSchemaCacheValue) schemaCacheValue.get()).getPartitionColumns();
+    }
+
+    public long getLatestSnapshotIdFromCache() throws AnalysisException {
+        makeSureInitialized();
+        Optional<SchemaCacheValue> schemaCacheValue = getSchemaCacheValue();
+        if (!schemaCacheValue.isPresent()) {
+            throw new AnalysisException("not present");
+        }
+        return ((PaimonSchemaCacheValue) schemaCacheValue.get()).getSnapshootId();
+    }
+
     @Override
     public Optional<SchemaCacheValue> initSchema() {
         Table paimonTable = ((PaimonExternalCatalog) catalog).getPaimonTable(dbName, name);
         TableSchema schema = ((FileStoreTable) paimonTable).schema();
         List<DataField> columns = schema.fields();
         List<Column> tmpSchema = Lists.newArrayListWithCapacity(columns.size());
+        Set<String> partitionColumnNames = Sets.newHashSet(paimonTable.partitionKeys());
+        List<Column> partitionColumns = Lists.newArrayList();
         for (DataField field : columns) {
-            tmpSchema.add(new Column(field.name().toLowerCase(),
+            Column column = new Column(field.name().toLowerCase(),
                     paimonTypeToDorisType(field.type()), true, null, true, field.description(), true,
-                    field.id()));
+                    field.id());
+            tmpSchema.add(column);
+            if (partitionColumnNames.contains(field.name())) {
+                partitionColumns.add(column);
+            }
+        }
+        try {
+            // after 0.9.0 paimon will support table.getLatestSnapshotId()
+            long latestSnapshotId = loadLatestSnapshotId();
+            PaimonPartitionInfo partitionInfo = loadPartitionInfo(partitionColumns);
+            return Optional.of(new PaimonSchemaCacheValue(tmpSchema, partitionColumns, paimonTable, latestSnapshotId,
+                    partitionInfo));
+        } catch (IOException | AnalysisException e) {
+            LOG.warn(e);
+            return Optional.empty();
+        }
+    }
+
+    private long loadLatestSnapshotId() throws IOException {
+        Table table = ((PaimonExternalCatalog) catalog).getPaimonTable(dbName,
+                name + Catalog.SYSTEM_TABLE_SPLITTER + SnapshotsTable.SNAPSHOTS);
+        // snapshotId
+        List<InternalRow> rows = PaimonUtil.read(table, new int[][] {{0}});
+        long latestSnapshotId = 0L;
+        for (InternalRow row : rows) {
+            long snapshotId = row.getLong(0);
+            if (snapshotId > latestSnapshotId) {
+                latestSnapshotId = snapshotId;
+            }
+        }
+        return latestSnapshotId;
+    }
+
+    private PaimonPartitionInfo loadPartitionInfo(List<Column> partitionColumns) throws IOException, AnalysisException {
+        if (CollectionUtils.isEmpty(partitionColumns)) {
+            return new PaimonPartitionInfo();
+        }
+        List<PaimonPartition> paimonPartitions = loadPartitions();
+        return PaimonUtil.generatePartitionInfo(partitionColumns, paimonPartitions);
+    }
+
+    private List<PaimonPartition> loadPartitions()
+            throws IOException {
+        Table table = ((PaimonExternalCatalog) catalog).getPaimonTable(dbName,
+                name + Catalog.SYSTEM_TABLE_SPLITTER + PartitionsTable.PARTITIONS);
+        List<InternalRow> rows = PaimonUtil.read(table, null);
+        List<PaimonPartition> res = Lists.newArrayListWithCapacity(rows.size());
+        for (InternalRow row : rows) {
+            res.add(PaimonUtil.rowToPartition(row));
         }
-        return Optional.of(new PaimonSchemaCacheValue(tmpSchema, paimonTable));
+        return res;
     }
 
     private Type paimonPrimitiveTypeToDorisType(org.apache.paimon.types.DataType dataType) {
@@ -205,4 +304,56 @@ public long fetchRowCount() {
         }
         return rowCount > 0 ? rowCount : UNKNOWN_ROW_COUNT;
     }
+
+    @Override
+    public void beforeMTMVRefresh(MTMV mtmv) throws DdlException {
+        Env.getCurrentEnv().getRefreshManager()
+                .refreshTable(getCatalog().getName(), getDbName(), getName(), true);
+    }
+
+    @Override
+    public Map<String, PartitionItem> getAndCopyPartitionItems() {
+        return Maps.newHashMap(getPartitionInfoFromCache().getNameToPartitionItem());
+    }
+
+    @Override
+    public PartitionType getPartitionType() {
+        return getPartitionColumnsFromCache().size() > 0 ? PartitionType.LIST : PartitionType.UNPARTITIONED;
+    }
+
+    @Override
+    public Set<String> getPartitionColumnNames() {
+        return getPartitionColumnsFromCache().stream()
+                .map(c -> c.getName().toLowerCase()).collect(Collectors.toSet());
+    }
+
+    @Override
+    public List<Column> getPartitionColumns() {
+        return getPartitionColumnsFromCache();
+    }
+
+    @Override
+    public MTMVSnapshotIf getPartitionSnapshot(String partitionName, MTMVRefreshContext context)
+            throws AnalysisException {
+        PaimonPartition paimonPartition = getPartitionInfoFromCache().getNameToPartition().get(partitionName);
+        if (paimonPartition == null) {
+            throw new AnalysisException("can not find partition: " + partitionName);
+        }
+        return new MTMVTimestampSnapshot(paimonPartition.getLastUpdateTime());
+    }
+
+    @Override
+    public MTMVSnapshotIf getTableSnapshot(MTMVRefreshContext context) throws AnalysisException {
+        return new MTMVVersionSnapshot(getLatestSnapshotIdFromCache());
+    }
+
+    @Override
+    public boolean isPartitionColumnAllowNull() {
+        // Paimon will write to the 'null' partition regardless of whether it is' null or 'null'.
+        // The logic is inconsistent with Doris' empty partition logic, so it needs to return false.
+        // However, when Spark creates Paimon tables, specifying 'not null' does not take effect.
+        // In order to successfully create the materialized view, false is returned here.
+        // The cost is that Paimon partition writes a null value, and the materialized view cannot detect this data.
+        return true;
+    }
 }

fe/fe-core/src/main/java/org/apache/doris/datasource/paimon/PaimonPartition.java

@@ -0,0 +1,61 @@
+// 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.doris.datasource.paimon;
+
+// https://paimon.apache.org/docs/0.9/maintenance/system-tables/#partitions-table
+public class PaimonPartition {
+    // Partition values, for example: [1, dd]
+    private final String partitionValues;
+    // The amount of data in the partition
+    private final long recordCount;
+    // Partition file size
+    private final long fileSizeInBytes;
+    // Number of partition files
+    private final long fileCount;
+    // Last update time of partition
+    private final long lastUpdateTime;
+
+    public PaimonPartition(String partitionValues, long recordCount, long fileSizeInBytes, long fileCount,
+            long lastUpdateTime) {
+        this.partitionValues = partitionValues;
+        this.recordCount = recordCount;
+        this.fileSizeInBytes = fileSizeInBytes;
+        this.fileCount = fileCount;
+        this.lastUpdateTime = lastUpdateTime;
+    }
+
+    public String getPartitionValues() {
+        return partitionValues;
+    }
+
+    public long getRecordCount() {
+        return recordCount;
+    }
+
+    public long getFileSizeInBytes() {
+        return fileSizeInBytes;
+    }
+
+    public long getFileCount() {
+        return fileCount;
+    }
+
+    public long getLastUpdateTime() {
+        return lastUpdateTime;
+    }
+}

fe/fe-core/src/main/java/org/apache/doris/datasource/paimon/PaimonPartitionInfo.java

@@ -0,0 +1,48 @@
+// 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.doris.datasource.paimon;
+
+import org.apache.doris.catalog.PartitionItem;
+
+import com.google.common.collect.Maps;
+
+import java.util.Map;
+
+public class PaimonPartitionInfo {
+    private Map<String, PartitionItem> nameToPartitionItem;
+    private Map<String, PaimonPartition> nameToPartition;
+
+    public PaimonPartitionInfo() {
+        this.nameToPartitionItem = Maps.newHashMap();
+        this.nameToPartition = Maps.newHashMap();
+    }
+
+    public PaimonPartitionInfo(Map<String, PartitionItem> nameToPartitionItem,
+            Map<String, PaimonPartition> nameToPartition) {
+        this.nameToPartitionItem = nameToPartitionItem;
+        this.nameToPartition = nameToPartition;
+    }
+
+    public Map<String, PartitionItem> getNameToPartitionItem() {
+        return nameToPartitionItem;
+    }
+
+    public Map<String, PaimonPartition> getNameToPartition() {
+        return nameToPartition;
+    }
+}

fe/fe-core/src/main/java/org/apache/doris/datasource/paimon/PaimonSchemaCacheValue.java

@@ -27,13 +27,34 @@
 public class PaimonSchemaCacheValue extends SchemaCacheValue {
 
     private Table paimonTable;
+    private List<Column> partitionColumns;
+    private PaimonPartitionInfo partitionInfo;
 
-    public PaimonSchemaCacheValue(List<Column> schema, Table paimonTable) {
+    private long snapshootId;
+
+    public PaimonSchemaCacheValue(List<Column> schema, List<Column> partitionColumns, Table paimonTable,
+            long snapshootId,
+            PaimonPartitionInfo partitionInfo) {
         super(schema);
+        this.partitionColumns = partitionColumns;
         this.paimonTable = paimonTable;
+        this.snapshootId = snapshootId;
+        this.partitionInfo = partitionInfo;
     }
 
     public Table getPaimonTable() {
         return paimonTable;
     }
+
+    public List<Column> getPartitionColumns() {
+        return partitionColumns;
+    }
+
+    public PaimonPartitionInfo getPartitionInfo() {
+        return partitionInfo;
+    }
+
+    public long getSnapshootId() {
+        return snapshootId;
+    }
 }