dawidwys commented on code in PR #21635:
URL: https://github.com/apache/flink/pull/21635#discussion_r1086628860
##########
flink-core/src/main/java/org/apache/flink/api/common/typeutils/CompositeTypeSerializerSnapshot.java:
##########
@@ -290,26 +332,26 @@ protected void readOuterSnapshot(
throws IOException {}
/**
- * Checks whether the outer snapshot is compatible with a given new
serializer.
+ * Checks the schema compatibility of the given old serializer snapshot
based on the outer
+ * snapshot.
*
- * <p>The base implementation of this method just returns {@code true},
i.e. it assumes that the
- * outer serializer only has nested serializers and no extra information,
and therefore the
- * result of the check must always be true. Otherwise, if the outer
serializer contains some
+ * <p>The base implementation of this method assumes that the outer
serializer only has nested
+ * serializers and no extra information, and therefore the result of the
check is {@link
+ * OuterSchemaCompatibility#COMPATIBLE_AS_IS}. Otherwise, if the outer
serializer contains some
* extra information that has been persisted as part of the serializer
snapshot, this must be
* overridden. Note that this method and the corresponding methods {@link
* #writeOuterSnapshot(DataOutputView)}, {@link #readOuterSnapshot(int,
DataInputView,
* ClassLoader)} needs to be implemented.
*
- * @param newSerializer the new serializer, which contains the new outer
information to check
- * against.
- * @return a flag indicating whether or not the new serializer's outer
information is compatible
- * with the one written in this snapshot.
- * @deprecated this method is deprecated, and will be removed in the
future. Please implement
- * {@link #resolveOuterSchemaCompatibility(TypeSerializer)} instead.
+ * @param oldSerializerSnapshot the old serializer snapshot, which
contains the old outer
+ * information to check against.
+ * @return a {@link OuterSchemaCompatibility} indicating whether or the
new serializer's outer
+ * information is compatible, requires migration, or incompatible with
the one written in
+ * this snapshot.
*/
- @Deprecated
- protected boolean isOuterSnapshotCompatible(S newSerializer) {
Review Comment:
Let's first deal with
https://github.com/apache/flink/pull/21635#discussion_r1086625857 as I believe
it is related.
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