stevenzwu commented on code in PR #5380:
URL: https://github.com/apache/iceberg/pull/5380#discussion_r944074285
##########
docs/flink-getting-started.md:
##########
@@ -634,6 +634,26 @@ FlinkSink.forRowData(input)
env.execute("Test Iceberg DataStream");
```
+## UPSERT mode
+
+Iceberg supports `UPSERT` based on the primary key when writing data into v2
table format.
+
+Enable the `UPSERT` mode on a table by adding the `write.upsert.enabled`
configuration. All writing will be in `UPSERT` mode unless you overwrite it
when building the writer:
Review Comment:
Lead this paragraph with `1. `. e.g.,
```
1. Enable the `UPSERT` mode as as table-level property ..... Here is an
example SQL statement to set the table property when creating a table. It
would be applied for all write paths to this table (batch or streaming) unless
overwritten by write options as described later.
```
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