zhuangchong commented on code in PR #1676:
URL: https://github.com/apache/incubator-paimon/pull/1676#discussion_r1277247038
##########
docs/content/how-to/altering-tables.md:
##########
@@ -413,6 +413,48 @@ Supported Type Conversions.
{{< generated/column_type_conversion >}}
+## Changing Column Default Value
+
+The following SQL changes default value of column `col_a` to `0`.
+
+{{< tabs "change-column-default-value" >}}
+
+{{< tab "Flink" >}}
+
+```sql
+ALTER TABLE my_table SET (
+ 'fields.col_a.default-value' = '0'
+);
+```
+
+{{< /tab >}}
+
+{{< tab "Spark3" >}}
+
+```sql
+-- alter column
+ALTER TABLE my_table ALTER COLUMN col_a SET DEFAULT 0;
+
+-- or set properties
+ALTER TABLE my_table SET TBLPROPERTIES (
+ 'fields.col_a.default-value' = '0'
+);
+```
+
+{{< /tab >}}
+
+{{< tab "Trino" >}}
+
+```sql
+ALTER TABLE my_table SET PROPERTIES fields.col_a.default-value = '0';
Review Comment:
I copied this part.
https://github.com/apache/incubator-paimon/blob/cfddb74dd34fc51ff8a76b46bf54a3ed8e597d5d/docs/content/how-to/altering-tables.md?plain=1#L55-L61
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