JingsongLi commented on a change in pull request #41: URL: https://github.com/apache/flink-table-store/pull/41#discussion_r826901319
########## File path: flink-table-store-connector/src/main/java/org/apache/flink/table/store/connector/source/TableStoreSource.java ########## @@ -0,0 +1,237 @@ +/* + * 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.store.connector.source; + +import org.apache.flink.api.common.typeinfo.TypeInformation; +import org.apache.flink.table.connector.ChangelogMode; +import org.apache.flink.table.connector.source.DynamicTableSource; +import org.apache.flink.table.connector.source.ScanTableSource; +import org.apache.flink.table.connector.source.SourceProvider; +import org.apache.flink.table.connector.source.abilities.SupportsFilterPushDown; +import org.apache.flink.table.connector.source.abilities.SupportsProjectionPushDown; +import org.apache.flink.table.expressions.CallExpression; +import org.apache.flink.table.expressions.Expression; +import org.apache.flink.table.expressions.ExpressionVisitor; +import org.apache.flink.table.expressions.FieldReferenceExpression; +import org.apache.flink.table.expressions.ResolvedExpression; +import org.apache.flink.table.expressions.TypeLiteralExpression; +import org.apache.flink.table.expressions.ValueLiteralExpression; +import org.apache.flink.table.factories.DynamicTableFactory; +import org.apache.flink.table.store.connector.TableStore; +import org.apache.flink.table.store.file.predicate.PredicateConverter; +import org.apache.flink.table.store.log.LogSourceProvider; +import org.apache.flink.table.store.log.LogStoreTableFactory; +import org.apache.flink.table.types.DataType; +import org.apache.flink.table.types.logical.LogicalType; + +import javax.annotation.Nullable; + +import java.util.ArrayList; +import java.util.Collections; +import java.util.List; +import java.util.stream.Collectors; + +/** + * Table source to create {@link FileStoreSource} under batch mode or change-tracking is disabled. + * For streaming mode with change-tracking enabled and FULL scan mode, it will create a {@link + * org.apache.flink.connector.base.source.hybrid.HybridSource} of {@link FileStoreSource} and kafka + * log source created by {@link LogSourceProvider}. + */ +public class TableStoreSource + implements ScanTableSource, SupportsFilterPushDown, SupportsProjectionPushDown { + + private final TableStore tableStore; + private final boolean streaming; + @Nullable private final DynamicTableFactory.Context logStoreContext; + @Nullable private final LogStoreTableFactory logStoreTableFactory; + + @Nullable private List<ResolvedExpression> partitionFilters; + @Nullable private List<ResolvedExpression> fieldFilters; + @Nullable private int[][] projectFields; + + public TableStoreSource( + TableStore tableStore, + boolean streaming, + @Nullable DynamicTableFactory.Context logStoreContext, + @Nullable LogStoreTableFactory logStoreTableFactory) { + this.tableStore = tableStore; + this.streaming = streaming; + this.logStoreContext = logStoreContext; + this.logStoreTableFactory = logStoreTableFactory; + } + + @Override + public ChangelogMode getChangelogMode() { + return streaming + ? tableStore.valueCountMode() + ? ChangelogMode.all() + // TODO: optimize upsert when consistency mode is transactional and + // log.changelog-mode is all + : ChangelogMode.upsert() + : ChangelogMode.insertOnly(); + } + + @Override + public ScanRuntimeProvider getScanRuntimeProvider(ScanContext scanContext) { + LogSourceProvider logSourceProvider = null; + if (logStoreTableFactory != null) { + logSourceProvider = + logStoreTableFactory.createSourceProvider( + logStoreContext, + new LogStoreTableFactory.SourceContext() { + @Override + public <T> TypeInformation<T> createTypeInformation( + DataType producedDataType) { + return scanContext.createTypeInformation(producedDataType); + } + + @Override + public <T> TypeInformation<T> createTypeInformation( + LogicalType producedLogicalType) { + return scanContext.createTypeInformation(producedLogicalType); + } + + @Override + public DataStructureConverter createDataStructureConverter( + DataType producedDataType) { + return scanContext.createDataStructureConverter( + producedDataType); + } + }); + } + TableStore.SourceBuilder builder = + tableStore + .sourceBuilder() + .withContinuousMode(streaming) + .withHybridMode(streaming && logSourceProvider != null) + .withLogSourceProvider(logSourceProvider) + .withProjection(projectFields) + .withPartitionPredicate(PredicateConverter.convert(partitionFilters)) + .withFieldPredicate(PredicateConverter.convert(fieldFilters)); + return SourceProvider.of(builder.build()); + } + + @Override + public DynamicTableSource copy() { + TableStoreSource copied = + new TableStoreSource(tableStore, streaming, logStoreContext, logStoreTableFactory); + copied.partitionFilters = partitionFilters; + copied.fieldFilters = fieldFilters; + return copied; + } + + @Override + public String asSummaryString() { + return "TableStoreSource"; + } + + @Override + public Result applyFilters(List<ResolvedExpression> filters) { + if (tableStore.partitioned()) { + classifyFilters(filters); + } else { + fieldFilters = filters; + } + return Result.of( + new ArrayList<>(filters), + fieldFilters == null ? Collections.emptyList() : fieldFilters); + } + + @Override + public boolean supportsNestedProjection() { + return false; + } + + @Override + public void applyProjection(int[][] projectedFields, DataType producedDataType) { + this.projectFields = projectedFields; + } + + private void classifyFilters(List<ResolvedExpression> filters) { + List<String> fieldNames = tableStore.fieldNames(); + List<String> partitionKeys = tableStore.partitionKeys(); + PartitionIndexVisitor visitor = + new PartitionIndexVisitor( + fieldNames.stream().mapToInt(partitionKeys::indexOf).toArray()); + filters.forEach( + filter -> { + try { + if (partitionFilters == null) { + partitionFilters = new ArrayList<>(); Review comment: Just init with `new ArrayList<>()`? -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. 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