Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/21070#discussion_r186357714
--- Diff:
sql/core/src/main/java/org/apache/spark/sql/execution/datasources/parquet/VectorizedPlainValuesReader.java
---
@@ -63,115 +59,157 @@ public final void readBooleans(int total,
WritableColumnVector c, int rowId) {
}
}
+ private ByteBuffer getBuffer(int length) {
+ try {
+ return in.slice(length).order(ByteOrder.LITTLE_ENDIAN);
+ } catch (IOException e) {
+ throw new ParquetDecodingException("Failed to read " + length + "
bytes", e);
+ }
+ }
+
@Override
public final void readIntegers(int total, WritableColumnVector c, int
rowId) {
- c.putIntsLittleEndian(rowId, total, buffer, offset -
Platform.BYTE_ARRAY_OFFSET);
- offset += 4 * total;
+ int requiredBytes = total * 4;
+ ByteBuffer buffer = getBuffer(requiredBytes);
+
+ if (buffer.hasArray()) {
--- End diff --
shall we assert `buffer.hasArray()` is always true?
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