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# RFCs

The RFC process is documented on our [site](https://hudi.apache.org/contribute/rfc-process). Please familiarize yourself
with it, before working a new RFC.

Status can be one of these values.

| Status | Meaning |
| -------|-------------------------------------------------------|
| `UNDER REVIEW` |  RFC has been proposed and community is actively debating the design/proposal.        |
| `IN PROGRESS` |  The initial phase of implementation is underway.        |
| `ONGOING` |  Some or most work has landed; community continues to improve or build follow on phases.         |
| `ABANDONED` | The proposal was not implemented, due to various reasons.         |
| `COMPLETED` |  All work is deemed complete.        |

The list of all RFCs can be found here.

> Older RFC content is still [here](https://cwiki.apache.org/confluence/display/HUDI/RFC+Process).

| RFC Number | Title                                                                                                                                                                                                                | Status |
| ---|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| --- |
| 1 | [CSV Source Support for Delta Streamer](https://cwiki.apache.org/confluence/display/HUDI/RFC+-+01+%3A+CSV+Source+Support+for+Delta+Streamer)                                                                         | `COMPLETED` |
| 2 | [ORC Storage in Hudi](https://cwiki.apache.org/confluence/pages/viewpage.action?pageId=113708439)                                                                                                                    | `ONGOING` |
| 3 | [Timeline Service with Incremental File System View Syncing](https://cwiki.apache.org/confluence/pages/viewpage.action?pageId=113708965)                                                                             | `COMPLETED` |
| 4 | [Faster Hive incremental pull queries](https://cwiki.apache.org/confluence/pages/viewpage.action?pageId=115513622)                                                                                                   | `COMPLETED` |
| 5 | [HUI (Hudi WebUI)](https://cwiki.apache.org/confluence/pages/viewpage.action?pageId=130027233)                                                                                                                       | `ABANDONED` |
| 6 | [Add indexing support to the log file](https://cwiki.apache.org/confluence/display/HUDI/RFC+-+06+%3A+Add+indexing+support+to+the+log+file)                                                                           | `ABANDONED` |
| 7 | [Point in time Time-Travel queries on Hudi table](https://cwiki.apache.org/confluence/display/HUDI/RFC+-+07+%3A+Point+in+time+Time-Travel+queries+on+Hudi+table)                                                     | `COMPLETED` |
| 8 | [Record level indexing mechanisms for Hudi datasets](https://cwiki.apache.org/confluence/display/HUDI/RFC-08++Record+level+indexing+mechanisms+for+Hudi+datasets)                                                    | `ONGOING` |
| 9 | [Hudi Dataset Snapshot Exporter](https://cwiki.apache.org/confluence/display/HUDI/RFC+-+09+%3A+Hudi+Dataset+Snapshot+Exporter)                                                                                       | `COMPLETED` |
| 10 | [Restructuring and auto-generation of docs](https://cwiki.apache.org/confluence/display/HUDI/RFC+-+10+%3A+Restructuring+and+auto-generation+of+docs)                                                                 | `COMPLETED` |
| 11 | [Refactor of the configuration framework of hudi project](https://cwiki.apache.org/confluence/display/HUDI/RFC+-+11+%3A+Refactor+of+the+configuration+framework+of+hudi+project)                                     | `ABANDONED` |
| 12 | [Efficient Migration of Large Parquet Tables to Apache Hudi](https://cwiki.apache.org/confluence/display/HUDI/RFC+-+12+%3A+Efficient+Migration+of+Large+Parquet+Tables+to+Apache+Hudi)                               | `COMPLETED` |
| 13 | [Integrate Hudi with Flink](https://cwiki.apache.org/confluence/pages/viewpage.action?pageId=141724520)                                                                                                              | `COMPLETED` |
| 14 | [JDBC incremental puller](https://cwiki.apache.org/confluence/display/HUDI/RFC+-+14+%3A+JDBC+incremental+puller)                                                                                                     | `COMPLETED` |
| 15 | [HUDI File Listing Improvements](https://cwiki.apache.org/confluence/display/HUDI/RFC+-+15%3A+HUDI+File+Listing+Improvements)                                                                                        | `COMPLETED` |
| 16 | [Abstraction for HoodieInputFormat and RecordReader](https://cwiki.apache.org/confluence/display/HUDI/RFC+-+16+Abstraction+for+HoodieInputFormat+and+RecordReader)                                                   | `COMPLETED` |
| 17 | [Abstract common meta sync module support multiple meta service](https://cwiki.apache.org/confluence/display/HUDI/RFC+-+17+Abstract+common+meta+sync+module+support+multiple+meta+service)                           | `COMPLETED` |
| 18 | [Insert Overwrite API](https://cwiki.apache.org/confluence/display/HUDI/RFC+-+18+Insert+Overwrite+API)                                                                                                               | `COMPLETED` |
| 19 | [Clustering data for freshness and query performance](https://cwiki.apache.org/confluence/display/HUDI/RFC+-+19+Clustering+data+for+freshness+and+query+performance)                                                 | `COMPLETED` |
| 20 | [handle failed records](https://cwiki.apache.org/confluence/display/HUDI/RFC+-+20+%3A+handle+failed+records)                                                                                                         | `IN PROGRESS` |
| 21 | [Allow HoodieRecordKey to be Virtual](https://cwiki.apache.org/confluence/display/HUDI/RFC+-+21+%3A+Allow+HoodieRecordKey+to+be+Virtual)                                                                             | `COMPLETED` |
| 22 | [Snapshot Isolation using Optimistic Concurrency Control for multi-writers](https://cwiki.apache.org/confluence/display/HUDI/RFC+-+22+%3A+Snapshot+Isolation+using+Optimistic+Concurrency+Control+for+multi-writers) | `COMPLETED` |
| 23 | [Hudi Observability metrics collection](https://cwiki.apache.org/confluence/display/HUDI/RFC+-+23+%3A+Hudi+Observability+metrics+collection)| `ABANDONED` | 
| 24 | [Hoodie Flink Writer Proposal](https://cwiki.apache.org/confluence/display/HUDI/RFC-24%3A+Hoodie+Flink+Writer+Proposal) | `COMPLETED` | 
| 25 | [Spark SQL Extension For Hudi](https://cwiki.apache.org/confluence/display/HUDI/RFC+-+25%3A+Spark+SQL+Extension+For+Hudi) | `COMPLETED` | 
| 26 | [Optimization For Hudi Table Query](https://cwiki.apache.org/confluence/display/HUDI/RFC-26+Optimization+For+Hudi+Table+Query) | `ONGOING` | 
| 27 | [Data skipping index to improve query performance](https://cwiki.apache.org/confluence/display/HUDI/RFC-27+Data+skipping+index+to+improve+query+performance) | `ONGOING` | 
| 28 | [Support Z-order curve](https://cwiki.apache.org/confluence/pages/viewpage.action?pageId=181307144) | `COMPLETED` |
| 29 | [Hash Index](https://cwiki.apache.org/confluence/display/HUDI/RFC+-+29%3A+Hash+Index) | `ONGOING` | 
| 30 | [Batch operation](https://cwiki.apache.org/confluence/display/HUDI/RFC+-+30%3A+Batch+operation) | `UNDER REVIEW` | 
| 31 | [Hive integration Improvement](https://cwiki.apache.org/confluence/display/HUDI/RFC+-+31%3A+Hive+integration+Improvment)| `UNDER REVIEW` | 
| 32 | [Kafka Connect Sink for Hudi](https://cwiki.apache.org/confluence/display/HUDI/RFC-32+Kafka+Connect+Sink+for+Hudi)| `ONGOING` | 
| 33 | [Hudi supports more comprehensive Schema Evolution](https://cwiki.apache.org/confluence/display/HUDI/RFC+-+33++Hudi+supports+more+comprehensive+Schema+Evolution)| `ONGOING` | 
| 34 | [Hudi BigQuery Integration](./rfc-34/rfc-34.md) | `COMPLETED` | 
| 35 | [Make Flink MOR table writing streaming friendly](https://cwiki.apache.org/confluence/display/HUDI/RFC-35%3A+Make+Flink+MOR+table+writing+streaming+friendly)| `UNDER REVIEW` | 
| 36 | [HUDI Metastore Server](https://cwiki.apache.org/confluence/display/HUDI/%5BWIP%5D+RFC-36%3A+HUDI+Metastore+Server)| `UNDER REVIEW` | 
| 37 | [Hudi Metadata based Bloom Index](rfc-37/rfc-37.md) | `ONGOING` | 
| 38 | [Spark Datasource V2 Integration](./rfc-38/rfc-38.md) | `IN PROGRESS` | 
| 39 | [Incremental source for Debezium](./rfc-39/rfc-39.md) | `ONGOING` | 
| 40 | [Hudi Connector for Trino](./rfc-40/rfc-40.md) | `IN PROGRESS` | 
| 41 | [Hudi Snowflake Integration] | `UNDER REVIEW`| 
| 42 | [Consistent Hashing Index](./rfc-42/rfc-42.md) | `IN PROGRESS` | 
| 43 | [Compaction / Clustering Service](./rfc-43/rfc-43.md) | `UNDER REVIEW` | 
| 44 | [Hudi Connector for Presto](./rfc-44/rfc-44.md) | `IN PROGRESS` | 
| 45 | [Asynchronous Metadata Indexing](./rfc-45/rfc-45.md) | `ONGOING` | 
| 46 | [Optimizing Record Payload Handling](./rfc-46/rfc-46.md) | `UNDER REVIEW` | 
| 47 | [Add Call Produce Command for Spark SQL](./rfc-47/rfc-47.md) | `UNDER REVIEW` | 
| 48 | [LogCompaction for MOR tables](./rfc-48/rfc-48.md) | `UNDER REVIEW` | 
| 49 | [Support sync with DataHub](./rfc-49/rfc-49.md)    | `ONGOING` |
| 50 | [Improve Timeline Server](./rfc-50/rfc-50.md) | `UNDER REVIEW` | 
| 51 | [Change Data Capture](./rfc-51/rfc-51.md) | `UNDER REVIEW` |
| 52 | [Introduce Secondary Index to Improve HUDI Query Performance](./rfc-52/rfc-52.md) | `UNDER REVIEW` |
| 53 | [Use Lock-Free Message Queue Improving Hoodie Writing Efficiency](./rfc-53/rfc-53.md) | `UNDER REVIEW` | 
| 54 | [New Table APIs and Streamline Hudi Configs](./rfc-54/rfc-54.md) | `UNDER REVIEW` | 
| 55 | [Improve Hive/Meta sync class design and hierachies](./rfc-55/rfc-55.md) | `UNDER REVIEW` | 
| 56 | [Early Conflict Detection For Multi-Writer](./rfc-56/rfc-56.md) | `UNDER REVIEW` |