morrySnow commented on code in PR #872:
URL: https://github.com/apache/doris-website/pull/872#discussion_r1682306710
##########
versioned_docs/version-2.1/sql-manual/sql-statements/Data-Definition-Statements/Alter/ALTER-ASYNC-MATERIALIZED-VIEW.md:
##########
@@ -69,6 +70,28 @@ For example, modifying the grace_period of mv1 to 3000ms
ALTER MATERIALIZED VIEW mv1 set("grace_period"="3000");
```
+##### REPLACE
+```sql
+ALTER MATERIALIZED VIEW [db.]mv1 REPLACE WITH MATERIALIZED VIEW mv2
+[PROPERTIES('swap' = 'true')];
+```
+Replacing atoms with two materialized views
+
+swap default is TRUE
+- If the swap parameter is set to TRUE, it is equivalent to renaming the
materialized view mv1 to mv2, and renaming mv2 to mv1 at the same time
+- If the swap parameter is set to False, it is equivalent to renaming mv2 to
mv1 and deleting the original mv1
Review Comment:
```suggestion
- If the swap parameter is set to FALSE, it is equivalent to renaming mv2 to
mv1 and deleting the original mv1
```
##########
docs/sql-manual/sql-statements/Data-Definition-Statements/Alter/ALTER-ASYNC-MATERIALIZED-VIEW.md:
##########
@@ -69,6 +70,28 @@ For example, modifying the grace_period of mv1 to 3000ms
ALTER MATERIALIZED VIEW mv1 set("grace_period"="3000");
```
+##### REPLACE
+```sql
+ALTER MATERIALIZED VIEW [db.]mv1 REPLACE WITH MATERIALIZED VIEW mv2
+[PROPERTIES('swap' = 'true')];
+```
+Replacing atoms with two materialized views
+
+swap default is TRUE
+- If the swap parameter is set to TRUE, it is equivalent to renaming the
materialized view mv1 to mv2, and renaming mv2 to mv1 at the same time
+- If the swap parameter is set to False, it is equivalent to renaming mv2 to
mv1 and deleting the original mv1
Review Comment:
```suggestion
- If the swap parameter is set to FALSE, it is equivalent to renaming mv2 to
mv1 and deleting the original mv1
```
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