shangxinli commented on code in PR #1026:
URL: https://github.com/apache/parquet-mr/pull/1026#discussion_r1104769279
##########
parquet-hadoop/src/main/java/org/apache/parquet/hadoop/rewrite/ParquetRewriter.java:
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@@ -183,12 +186,61 @@ public ParquetRewriter(TransParquetFileReader reader,
}
}
+ // Open all input files to validate their schemas are compatible to merge
+ private void openInputFiles(List<Path> inputFiles, Configuration conf) {
+ Preconditions.checkArgument(inputFiles != null && !inputFiles.isEmpty(),
"No input files");
+
+ for (Path inputFile : inputFiles) {
Review Comment:
Do we want to set a max size?
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