nssalian commented on code in PR #17520: URL: https://github.com/apache/iceberg/pull/17520#discussion_r3790718703
########## data/src/main/java/org/apache/iceberg/data/RecordVariantShreddingAnalyzer.java: ########## @@ -0,0 +1,118 @@ +/* + * 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.iceberg.data; + +import java.util.List; +import java.util.Map; +import org.apache.iceberg.Schema; +import org.apache.iceberg.parquet.VariantShreddingAnalyzer; +import org.apache.iceberg.relocated.com.google.common.base.Preconditions; +import org.apache.iceberg.relocated.com.google.common.collect.Lists; +import org.apache.iceberg.types.Types.NestedField; +import org.apache.iceberg.variants.Variant; +import org.apache.iceberg.variants.VariantValue; +import org.apache.parquet.schema.Type; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +/** + * {@link Record} analyzer that resolves variant columns by position in {@link Schema#columns()}. + * Rows are read positionally, so an engine schema, if supplied, must place each variant column at + * its Iceberg-schema position. + */ +class RecordVariantShreddingAnalyzer extends VariantShreddingAnalyzer<Record, Schema> { + private static final Logger LOG = LoggerFactory.getLogger(RecordVariantShreddingAnalyzer.class); + + RecordVariantShreddingAnalyzer() {} + + @Override + public Map<Integer, Type> analyzeVariantColumns( + List<Record> bufferedRows, Schema icebergSchema, Schema engineSchema) { + // Record rows are built against the Iceberg schema; use it when no engine schema is supplied. + if (engineSchema == null) { + return super.analyzeVariantColumns(bufferedRows, icebergSchema, icebergSchema); + } + + checkVariantColumnPositionsAligned(icebergSchema, engineSchema); + return super.analyzeVariantColumns(bufferedRows, icebergSchema, engineSchema); + } + + @Override + protected int resolveColumnIndex(Schema engineSchema, String columnName) { + Preconditions.checkArgument(engineSchema != null, "Invalid engine schema: null"); + int index = positionOf(engineSchema, columnName); + if (index < 0) { + LOG.warn("Variant column {} not found in engine schema; skipping shredding", columnName); + } + + return index; + } + + // Rows are read positionally, so a variant column must sit at the same index in both schemas. + private static void checkVariantColumnPositionsAligned( + Schema icebergSchema, Schema engineSchema) { + List<NestedField> icebergColumns = icebergSchema.columns(); + for (int icebergIndex = 0; icebergIndex < icebergColumns.size(); icebergIndex++) { + NestedField col = icebergColumns.get(icebergIndex); + if (!col.type().isVariantType()) { + continue; + } + + int engineIndex = positionOf(engineSchema, col.name()); + Preconditions.checkArgument( + engineIndex < 0 || engineIndex == icebergIndex, + "Variant column %s position mismatch between Iceberg and engine schemas: %s vs %s", + col.name(), + icebergIndex, + engineIndex); + } + } + + private static int positionOf(Schema schema, String columnName) { + List<NestedField> columns = schema.columns(); + for (int index = 0; index < columns.size(); index++) { + if (columns.get(index).name().equals(columnName)) { + return index; + } + } + + return -1; + } + + @Override + protected List<VariantValue> extractVariantValues( + List<Record> bufferedRows, int variantFieldIndex) { + List<VariantValue> values = Lists.newArrayList(); + for (Record row : bufferedRows) { + Object fieldValue = row.get(variantFieldIndex); + if (fieldValue == null) { + continue; + } + + Preconditions.checkArgument( + fieldValue instanceof Variant, Review Comment: Done. extractVariantValues now logs and drops that column from analysis instead of throwing, so a non-Variant degrades to an unshredded column instead of aborting the whole buffered batch at flush - same as the null/missing-column degrade already on this path. In the KC path convert() always yields a Variant so it only trips on a hand-built record, but it no longer fails the commit. -- 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. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
