Github user parthchandra commented on a diff in the pull request:
https://github.com/apache/drill/pull/673#discussion_r90694144
--- Diff:
exec/java-exec/src/main/java/org/apache/drill/exec/store/parquet/columnreaders/ParquetFixedWidthDictionaryReaders.java
---
@@ -56,6 +58,31 @@ protected void readField(long recordsToReadInThisPass) {
}
}
+ /**
+ * This class uses for reading unsigned integer fields.
+ */
+ static class DictionaryUInt4Reader extends
FixedByteAlignedReader<UInt4Vector> {
+ DictionaryUInt4Reader(ParquetRecordReader parentReader, int
allocateSize, ColumnDescriptor descriptor,
+ ColumnChunkMetaData columnChunkMetaData, boolean
fixedLength, UInt4Vector v,
+ SchemaElement schemaElement) throws
ExecutionSetupException {
+ super(parentReader, allocateSize, descriptor, columnChunkMetaData,
fixedLength, v, schemaElement);
+ }
+
+ // this method is called by its superclass during a read loop
+ @Override
+ protected void readField(long recordsToReadInThisPass) {
+
+ recordsReadInThisIteration = Math.min(pageReader.currentPageCount
+ - pageReader.valuesRead, recordsToReadInThisPass -
valuesReadInCurrentPass);
+
+ if (usingDictionary) {
+ for (int i = 0; i < recordsReadInThisIteration; i++){
+ valueVec.getMutator().setSafe(valuesReadInCurrentPass + i,
pageReader.dictionaryValueReader.readInteger());
--- End diff --
you probably need to set writer index just as you do in the uint8 case.
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