jackye1995 commented on code in PR #6571:
URL: https://github.com/apache/iceberg/pull/6571#discussion_r1081543402
##########
docs/java-api.md:
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@@ -147,6 +147,53 @@ t.newAppend().appendFile(data).commit();
t.commitTransaction();
```
+### WriteData
+
+The java api can write data into iceberg table.
+
+First write data to the data file, then submit the data file, the data you
write will take effect in the table.
+
+For example, add 1000 pieces of data to the table.
+
+```java
+GenericAppenderFactory appenderFactory = new
GenericAppenderFactory(table.schema(), table.spec());
+
+int partitionId = 1, taskId = 1;
+OutputFileFactory outputFileFactory = OutputFileFactory.builderFor(table,
partitionId, taskId).format(FileFormat.PARQUET).build();
+final PartitionKey partitionKey = new PartitionKey(table.spec(),
table.spec().schema());
+final InternalRecordWrapper recordWrapper = new
InternalRecordWrapper(table.schema().asStruct());
+
+// partitionedFanoutWriter will auto partitioned record and create the
partitioned writer
+PartitionedFanoutWriter<Record> partitionedFanoutWriter = new
PartitionedFanoutWriter<Record>(table.spec(), FileFormat.PARQUET,
appenderFactory, outputFileFactory, table.io(), TARGET_FILE_SIZE_IN_BYTES) {
+ @Override
+ protected PartitionKey partition(Record record) {
+ partitionKey.partition(recordWrapper.wrap(record));
+ return partitionKey;
+ }
+};
+
+GenericRecord genericRecord = GenericRecord.create(table.schema());
+
+// assume write 1000 records
+for (int i = 0; i < 1000; i++) {
+ GenericRecord record = genericRecord.copy();
+ record.setField("level", i % 6 == 0 ? "error" : "info");
Review Comment:
we might want to specify the schema of the records you insert before the
code block so people can understand it more easily
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