jhchee opened a new issue, #8515:
URL: https://github.com/apache/hudi/issues/8515
**Describe the problem you faced**
Hi I wish to achieve explicit schema evolution via writing empty dataframe.
```
Dataset<Row> empty = spark.createDataFrame(new ArrayList<>(),
TargetSchema.SCHEMA);
empty.write()
.format("hudi")
.option(DataSourceWriteOptions.RECORDKEY_FIELD_OPT_KEY(),
"userId")
.option(DataSourceWriteOptions.PRECOMBINE_FIELD_OPT_KEY(),
"updatedAt")
.option(HoodieWriteConfig.TABLE_NAME, "table")
.mode(SaveMode.Append)
```
However, only the metadata fields (commit_time, commit_seq_no, etc) are
generated.
**To Reproduce**
Steps to reproduce the behavior:
1. Write empty dataframe with defined schema.
**Expected behavior**
Table will be populated with the columns in the defined schema.
**Environment Description**
* Hudi version : 0.12.2
* Spark version : 3.3.1
* Hive version :
* Hadoop version :
* Storage (HDFS/S3/GCS..) :
* Running on Docker? (yes/no) :
**Additional context**
Add any other context about the problem here.
**Stacktrace**
```Add the stacktrace of the error.```
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