thomasrebele commented on code in PR #6900:
URL: https://github.com/apache/hive/pull/6900#discussion_r4326706958
##########
serde/src/java/org/apache/hadoop/hive/serde2/OpenCSVSerde.java:
##########
@@ -131,6 +132,10 @@ public Writable doSerialize(Object obj, ObjectInspector
objInspector) throws Ser
} else if (fieldOI instanceof AbstractPrimitiveWritableObjectInspector) {
Object primitiveJavaObject =
((AbstractPrimitiveWritableObjectInspector)
fieldOI).getPrimitiveJavaObject(field);
outputFields[c] = Objects.toString(primitiveJavaObject, null);
+ } else if (fieldOI instanceof AbstractPrimitiveLazyObjectInspector) {
+ Object primitiveJavaObject =
+ ((AbstractPrimitiveLazyObjectInspector<?>)
fieldOI).getPrimitiveWritableObject(field);
+ outputFields[c] = Objects.toString(primitiveJavaObject, null);
} else {
Review Comment:
There was a
[discussion](https://github.com/apache/hive/pull/3438#pullrequestreview-1041921124)
around these questions on the PR that introduced these lines. Unfortunately a
part of the discussion is not available.
From what I understood: calling getPrimitiveJavaObject might return, e.g.,
byte[], and calling toString method on that object would results in a value
like "[B@6acbcfc0", which is not the goal of the OpenCSVSerde. The patch of
HIVE-26388 specifically uses AbstractPrimitiveWritableObjectInspector as the
getPrimitiveWritableObject returns an object that outputs a reasonable String
when calling toString.
I suggest extending this approach to AbstractPrimitiveLazyObjectInspector,
which also provides a getPrimitiveWritableObject function. I checked the code
of the implementations, and they return the same objects as the
AbstractPrimitiveWritableObjectInspector.
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