From 4da00b0b1dd22799408b7d7dd0b0a1e01924b00c Mon Sep 17 00:00:00 2001 From: DanRoscigno Date: Wed, 21 Dec 2022 09:07:40 -0500 Subject: [PATCH] clarify which engines support final --- docs/en/sql-reference/statements/select/from.md | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/docs/en/sql-reference/statements/select/from.md b/docs/en/sql-reference/statements/select/from.md index 183743654fd..17e9ca5a76a 100644 --- a/docs/en/sql-reference/statements/select/from.md +++ b/docs/en/sql-reference/statements/select/from.md @@ -21,8 +21,7 @@ Subquery is another `SELECT` query that may be specified in parenthesis inside ` When `FINAL` is specified, ClickHouse fully merges the data before returning the result and thus performs all data transformations that happen during merges for the given table engine. -It is applicable when selecting data from tables that use the [Replicated](../../../engines/table-engines/mergetree-family/replication.md) versions of `MergeTree` engines. -- [View](../../../engines/table-engines/special/view.md), [Buffer](../../../engines/table-engines/special/buffer.md), [Distributed](../../../engines/table-engines/special/distributed.md), and [MaterializedView](../../../engines/table-engines/special/materializedview.md) engines that operate over other engines, provided they were created over `MergeTree`-engine tables. +It is applicable when selecting data from ReplacingMergeTree, SummingMergeTree, AggregatingMergeTree, CollapsingMergeTree and VersionedCollapsingMergeTree tables. Now `SELECT` queries with `FINAL` are executed in parallel and slightly faster. But there are drawbacks (see below). The [max_final_threads](../../../operations/settings/settings.md#max-final-threads) setting limits the number of threads used.