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ASF GitHub Bot commented on PARQUET-2228: ----------------------------------------- gszadovszky commented on code in PR #1026: URL: https://github.com/apache/parquet-mr/pull/1026#discussion_r1112880384 ########## parquet-hadoop/src/main/java/org/apache/parquet/hadoop/rewrite/RewriteOptions.java: ########## @@ -101,37 +103,121 @@ public static class Builder { private List<String> encryptColumns; private FileEncryptionProperties fileEncryptionProperties; + /** + * Create a builder to create a RewriterOptions. + * + * @param conf configuration for reading from input files and writing to output file + * @param inputFile input file path to read from + * @param outputFile output file path to rewrite to + */ public Builder(Configuration conf, Path inputFile, Path outputFile) { this.conf = conf; this.inputFiles = Arrays.asList(inputFile); this.outputFile = outputFile; } + /** + * Create a builder to create a RewriterOptions. + * <p> + * Please note that if merging more than one file, the schema of all files must be the same. + * Otherwise, the rewrite will fail. + * <p> + * The rewrite will keep original row groups from all input files. This may not be optimal Review Comment: Thank you, @wgtmac > ParquetRewriter supports more than one input file > ------------------------------------------------- > > Key: PARQUET-2228 > URL: https://issues.apache.org/jira/browse/PARQUET-2228 > Project: Parquet > Issue Type: Sub-task > Components: parquet-mr > Reporter: Gang Wu > Assignee: Gang Wu > Priority: Major > > ParquetRewriter currently supports only one input file. The scope of this > task is to support multiple input files and the rewriter merges them into a > single one w/o some rewrite options specified. -- This message was sent by Atlassian Jira (v8.20.10#820010)