MonsterChenzhuo commented on code in PR #4833:
URL: https://github.com/apache/seatunnel/pull/4833#discussion_r1207598335
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seatunnel-connectors-v2/connector-mongodb/src/main/java/org/apache/seatunnel/connectors/seatunnel/mongodb/serde/RowDataDocumentSerializer.java:
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@@ -52,6 +56,20 @@ public RowDataDocumentSerializer(
@Override
public WriteModel<BsonDocument> serializeToWriteModel(SeaTunnelRow row) {
+ switch (row.getRowKind()) {
+ case INSERT:
+ case UPDATE_AFTER:
+ return upsert(row);
+ case UPDATE_BEFORE:
Review Comment:
[强]
When upsert (a combination of insert and update) operation is enabled, the
UPDATE_BEFORE type of operation is usually ignored. This is because in an
upsert operation, if there is no matching row in the database for the update
operation, an insert operation is performed. If a matching row exists, an
update operation is performed. In this scenario, the UPDATE_BEFORE type of
operation becomes irrelevant as it is retracting the previous row before the
update, but in an upsert operation, that row doesn't exist.
Therefore, to avoid confusion and redundancy, it is reasonable to ignore the
UPDATE_BEFORE type of operation when upsert operation is enabled. Only INSERT
and UPDATE_AFTER types of operations, which represent the content of the
inserted or updated rows, are considered to ensure the correct execution of the
upsert operation. This simplifies the code logic and improves efficiency.
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