rangareddy opened a new pull request, #12911:
URL: https://github.com/apache/hudi/pull/12911
### Change Logs
Fixed the default partition migration steps.
```scala
"default" partition detected. From 0.12, we are changing the default
partition in hudi to "__HIVE_DEFAULT_PARTITION__". Please read and write back
the data in "default" partition in hudi to new partition path
"__HIVE_DEFAULT_PARTITION__". "
Sample spark command to use to re-write the data:
val df =
spark.read.format("hudi").load(HUDI_TABLE_PATH).filter(col("PARTITION_PATH_COLUMN")
=== "default");
df.drop("_hoodie_commit_time").drop("_hoodie_commit_seqno").drop("_hoodie_record_key")
.drop("_hoodie_partition_path").drop("_hoodie_file_name").withColumn(PARTITION_PATH_COLUMN,"__HIVE_DEFAULT_PARTITION__")
.write.format("hudi").options(writeOptions).mode(Append).save(HUDI_TABLE_PATH);
Please fix values for PARTITION_PATH_COLUMN, HUDI_TABLE_PATH and set all
write configs in above command before running. Also do delete the records in
old partition once above command succeeds. Sample spark command to delete old
partition records:
val df =
spark.read.format("hudi").load(HUDI_TABLE_PATH).filter(col("PARTITION_PATH_COLUMN")
=== "default");
df.write.format("hudi").option("hoodie.datasource.write.operation","delete").options(writeOptions).mode(Append).save(HUDI_TABLE_PATH);
```
**Hudi Table data before migration:**
<img width="1430" alt="Screenshot 2025-03-03 at 8 45 18 PM"
src="https://github.com/user-attachments/assets/6ff64a96-2323-433c-83ef-68842e5a010e";
/>
**Hudi Table data after migration:**
<img width="1441" alt="Screenshot 2025-03-03 at 8 48 16 PM"
src="https://github.com/user-attachments/assets/b694e6db-eb54-45a0-82b3-373b5d110c30";
/>
**Hudi Table data before deleting default partition:**
<img width="1200" alt="Screenshot 2025-03-03 at 8 48 46 PM"
src="https://github.com/user-attachments/assets/b385c369-e749-46cc-8d30-74c0d582c5c5";
/>
**Hudi Table data after deleting default partition:**
<img width="1204" alt="Screenshot 2025-03-03 at 8 50 53 PM"
src="https://github.com/user-attachments/assets/03d7701a-949b-42aa-a5ba-7bda508dad35";
/>
### Impact
Update the default partition log message.
### Risk level (write none, low medium or high below)
none
### Documentation Update
N/A
### Contributor's checklist
- [ ] Read through [contributor's
guide](https://hudi.apache.org/contribute/how-to-contribute)
- [ ] Change Logs and Impact were stated clearly
- [ ] Adequate tests were added if applicable
- [ ] CI passed
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