Github user davies commented on a diff in the pull request:
https://github.com/apache/spark/pull/10581#discussion_r48898645
--- Diff:
sql/core/src/main/java/org/apache/spark/sql/execution/datasources/parquet/SpecificParquetRecordReaderBase.java
---
@@ -125,20 +129,80 @@ public void initialize(InputSplit inputSplit,
TaskAttemptContext taskAttemptCont
+ " in range " + split.getStart() + ", " + split.getEnd());
}
}
- MessageType fileSchema = footer.getFileMetaData().getSchema();
+ this.fileSchema = footer.getFileMetaData().getSchema();
Map<String, String> fileMetadata =
footer.getFileMetaData().getKeyValueMetaData();
- this.readSupport = getReadSupportInstance(
+ ReadSupport<T> readSupport = getReadSupportInstance(
(Class<? extends ReadSupport<T>>)
getReadSupportClass(configuration));
ReadSupport.ReadContext readContext = readSupport.init(new InitContext(
taskAttemptContext.getConfiguration(),
toSetMultiMap(fileMetadata), fileSchema));
this.requestedSchema = readContext.getRequestedSchema();
- this.fileSchema = fileSchema;
+ this.sparkSchema = new
CatalystSchemaConverter(configuration).convert(requestedSchema);
this.reader = new ParquetFileReader(configuration, file, blocks,
requestedSchema.getColumns());
for (BlockMetaData block : blocks) {
this.totalRowCount += block.getRowCount();
}
}
+ /**
+ * Returns the list of files at 'path' recursively. This skips files
that are ignored normally
+ * by MapReduce.
+ */
+ public static List<String> listDirectory(File path) throws IOException {
--- End diff --
Is this only used by tests?
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