viirya commented on code in PR #395:
URL: https://github.com/apache/datafusion-comet/pull/395#discussion_r1595546942
##########
common/src/main/java/org/apache/comet/vector/CometPlainVector.java:
##########
@@ -111,7 +115,12 @@ public UTF8String getUTF8String(int rowId) {
byte[] result = new byte[length];
Platform.copyMemory(
null, valueBufferAddress + offset, result,
Platform.BYTE_ARRAY_OFFSET, length);
- return UTF8String.fromBytes(result);
+
+ if (!isUuid) {
+ return UTF8String.fromBytes(result);
+ } else {
+ return UTF8String.fromString(convertToUuid(result).toString());
+ }
Review Comment:
We created parquet files in `makeParquetFileAllTypes`, for example. It uses
parquet writer to directly write parquet files instead of using
Dataset/DataFrame API. So you don't need to have uuid column in a table.
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