Github user vdiravka commented on a diff in the pull request: https://github.com/apache/drill/pull/824#discussion_r123339909 --- Diff: exec/java-exec/src/main/java/org/apache/drill/exec/store/parquet/Metadata.java --- @@ -748,6 +771,22 @@ public ParquetTableMetadataDirs(List<String> directories) { return directories; } + /** If directories list contains relative paths, update it to absolute ones + * @param baseDir base parent directory + */ + @JsonIgnore public void updateRelativePaths(Path baseDir) { + if (!directories.isEmpty()) { + // It is enough to check the first path to decide if updating needed + if (!new Path(directories.get(0)).isAbsolute()) { --- End diff -- It is possible to replace String with Path for directories paths due to implementing custom `JsonSerializer<Path>` and `JsonDeserializer<Path>`. But then it will be necessary to convert every `Path` from lists back into `String`, because a String paths are used in a lot of places: `FileSelection`, `Metadata`, `ParquetGroupScan`, `ReadEntryWithPath`, `FileWork`, `FormatSelection`, `FormatPlugin`, `PartitionLocation`and so on. I am totally agree with replacing `String` with `Path` requirement. But it should be done not only for parquet and in context of separate jira. I am going to create it.
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