From 706f6cef0cb76b20492e13d6555f812572658fbd Mon Sep 17 00:00:00 2001 From: adityaksolves Date: Mon, 15 Jun 2026 16:11:53 +0530 Subject: [PATCH] docs: fix parallel_view_processing example to use INSERT SELECT --- docs/materialized-view/incremental-materialized-view.md | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/docs/materialized-view/incremental-materialized-view.md b/docs/materialized-view/incremental-materialized-view.md index 2a23e52aee3..f86c8571313 100644 --- a/docs/materialized-view/incremental-materialized-view.md +++ b/docs/materialized-view/incremental-materialized-view.md @@ -1115,13 +1115,17 @@ ORDER BY uuid ASC 3 rows in set. Elapsed: 0.004 sec. ``` +:::note +As of ClickHouse v25.5, `parallel_view_processing` only applies to `INSERT ... SELECT` queries. Use `INSERT ... SELECT` to demonstrate parallel view processing as shown below. +::: + Conversely, consider what happens if we insert a row with `parallel_view_processing=1` enabled. With this enabled, the views are executed in parallel, giving no guarantees to the order at which rows arrive to the target table: ```sql TRUNCATE target; SET parallel_view_processing = 1; -INSERT INTO source VALUES ('test'); +INSERT INTO source SELECT 'test'; ``` ```response