mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-12-17 11:52:27 +00:00
24 lines
992 B
SQL
24 lines
992 B
SQL
-- Tags: no-parallel
|
|
-- Tag no-parallel: Messes with internal cache
|
|
|
|
SET allow_experimental_analyzer = 1;
|
|
|
|
SYSTEM DROP QUERY CACHE;
|
|
|
|
-- Run a silly query with a non-trivial plan and put the result into the query cache QC
|
|
SELECT 1 + number from system.numbers LIMIT 1 SETTINGS use_query_cache = true;
|
|
SELECT count(*) FROM system.query_cache;
|
|
|
|
-- EXPLAIN PLAN should show the same regardless if the result is calculated or read from the QC
|
|
EXPLAIN PLAN SELECT 1 + number from system.numbers LIMIT 1;
|
|
EXPLAIN PLAN SELECT 1 + number from system.numbers LIMIT 1 SETTINGS use_query_cache = true; -- (*)
|
|
|
|
-- EXPLAIN PIPELINE should show the same regardless if the result is calculated or read from the QC
|
|
EXPLAIN PIPELINE SELECT 1 + number from system.numbers LIMIT 1;
|
|
EXPLAIN PIPELINE SELECT 1 + number from system.numbers LIMIT 1 SETTINGS use_query_cache = true; -- (*)
|
|
|
|
-- Statements (*) must not cache their results into the QC
|
|
SELECT count(*) FROM system.query_cache;
|
|
|
|
SYSTEM DROP QUERY CACHE;
|