umehrot2 commented on a change in pull request #1427: [HUDI-727]: Copy default
values of fields if not present when rewriting incoming record with new schema
URL: https://github.com/apache/incubator-hudi/pull/1427#discussion_r399722115
##########
File path:
hudi-common/src/main/java/org/apache/hudi/common/util/HoodieAvroUtils.java
##########
@@ -214,6 +220,63 @@ private static GenericRecord rewrite(GenericRecord
record, Schema schemaWithFiel
return newRecord;
}
+ /*
+ This function takes the union of all the fields except hoodie metadata fields
+ */
+ private static List<Field> getAllFieldsToWrite(Schema oldSchema, Schema
newSchema) {
+ Set<Field> allFields = new HashSet<>(oldSchema.getFields());
+ List<Field> fields = new ArrayList<>(oldSchema.getFields());
+ for (Schema.Field f : newSchema.getFields()) {
+ if (!allFields.contains(f) && !isMetadataField(f.name())) {
+ fields.add(f);
+ }
+ }
+
+ return fields;
+ }
+
+ private static void populateNewRecordAsPerDataType(GenericRecord record,
Field field) {
+ switch (getSchemaTypeForField(field)) {
+ case STRING:
+ case BYTES:
+ case ENUM:
+ case FIXED:
+ record.put(field.name(), field.defaultVal() == null ? null : (String)
field.defaultVal());
Review comment:
Why do we need this casting of individual data types ? It seems we can just
pass `field.defaultVal()` as it is because it expects an `Object`, and
`field.defaultVal()` returns exactly that.
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