You are viewing a plain text version of this content. The canonical link for it is here.
Posted to commits@hudi.apache.org by GitBox <gi...@apache.org> on 2022/09/01 08:48:33 UTC
[GitHub] [hudi] danny0405 commented on a diff in pull request #6256: [RFC-51][HUDI-3478] Update RFC: CDC support
danny0405 commented on code in PR #6256:
URL: https://github.com/apache/hudi/pull/6256#discussion_r960387640
##########
rfc/rfc-51/rfc-51.md:
##########
@@ -64,71 +65,74 @@ We follow the debezium output format: four columns as shown below
Note: the illustration here ignores all the Hudi metadata columns like `_hoodie_commit_time` in `before` and `after` columns.
-## Goals
+## Design Goals
-1. Support row-level CDC records generation and persistence;
-2. Support both MOR and COW tables;
-3. Support all the write operations;
-4. Support Spark DataFrame/SQL/Streaming Query;
+1. Support row-level CDC records generation and persistence
+2. Support both MOR and COW tables
+3. Support all the write operations
+4. Support incremental queries in CDC format across supported engines
-## Implementation
+## Configurations
-### CDC Architecture
+| key | default | description |
+|-----------------------------------------------------|----------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
+| hoodie.table.cdc.enabled | `false` | The master switch of the CDC features. If `true`, writers and readers will respect CDC configurations and behave accordingly. |
+| hoodie.table.cdc.supplemental.logging.mode | `KEY_OP` | A mode to indicate the level of changed data being persisted. At the minimum level, `KEY_OP` indicates changed records' keys and operations to be persisted. `DATA_BEFORE`: persist records' before-images in addition to `KEY_OP`. `DATA_BEFORE_AFTER`: persist records' after-images in addition to `DATA_BEFORE`. |
-
+To perform CDC queries, users need to set `hoodie.datasource.query.incremental.format=cdc` and `hoodie.datasource.query.type=incremental`.
Review Comment:
Got you, i agree with the point.
--
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
To unsubscribe, e-mail: commits-unsubscribe@hudi.apache.org
For queries about this service, please contact Infrastructure at:
users@infra.apache.org