mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-11-10 01:25:21 +00:00
69 lines
5.3 KiB
SQL
69 lines
5.3 KiB
SQL
drop table if exists test_rewrite_uniq_to_count;
|
|
|
|
CREATE TABLE test_rewrite_uniq_to_count
|
|
(
|
|
`a` UInt8,
|
|
`b` UInt8,
|
|
`c` UInt8
|
|
) ENGINE = MergeTree ORDER BY `a`;
|
|
|
|
|
|
INSERT INTO test_rewrite_uniq_to_count values ('1', '1', '1'), ('1', '1', '1');
|
|
INSERT INTO test_rewrite_uniq_to_count values ('2', '2', '2'), ('2', '2', '2');
|
|
INSERT INTO test_rewrite_uniq_to_count values ('3', '3', '3'), ('3', '3', '3');
|
|
|
|
set optimize_uniq_to_count=true;
|
|
|
|
|
|
SELECT '1. test simple distinct';
|
|
SELECT uniq(a) FROM (SELECT DISTINCT a FROM test_rewrite_uniq_to_count) settings allow_experimental_analyzer=0;
|
|
EXPLAIN SYNTAX SELECT uniq(a) FROM (SELECT DISTINCT a FROM test_rewrite_uniq_to_count) settings allow_experimental_analyzer=0;
|
|
SELECT uniq(a) FROM (SELECT DISTINCT a FROM test_rewrite_uniq_to_count) settings allow_experimental_analyzer=1;
|
|
EXPLAIN QUERY TREE SELECT uniq(a) FROM (SELECT DISTINCT a FROM test_rewrite_uniq_to_count) settings allow_experimental_analyzer=1;
|
|
|
|
|
|
SELECT '2. test distinct with subquery alias';
|
|
SELECT uniq(t.a) FROM (SELECT DISTINCT a FROM test_rewrite_uniq_to_count) t settings allow_experimental_analyzer=0;
|
|
EXPLAIN SYNTAX SELECT uniq(a) FROM (SELECT DISTINCT a FROM test_rewrite_uniq_to_count) t settings allow_experimental_analyzer=0;
|
|
SELECT uniq(t.a) FROM (SELECT DISTINCT a FROM test_rewrite_uniq_to_count) t settings allow_experimental_analyzer=1;
|
|
EXPLAIN QUERY TREE SELECT uniq(t.a) FROM (SELECT DISTINCT a FROM test_rewrite_uniq_to_count) t settings allow_experimental_analyzer=1;
|
|
|
|
SELECT '3. test distinct with compound column name';
|
|
SELECT uniq(a) FROM (SELECT DISTINCT test_rewrite_uniq_to_count.a FROM test_rewrite_uniq_to_count) t settings allow_experimental_analyzer=0;
|
|
EXPLAIN SYNTAX SELECT uniq(a) FROM (SELECT DISTINCT test_rewrite_uniq_to_count.a FROM test_rewrite_uniq_to_count) t settings allow_experimental_analyzer=0;
|
|
SELECT uniq(a) FROM (SELECT DISTINCT test_rewrite_uniq_to_count.a FROM test_rewrite_uniq_to_count) t settings allow_experimental_analyzer=1;
|
|
EXPLAIN QUERY TREE SELECT uniq(a) FROM (SELECT DISTINCT test_rewrite_uniq_to_count.a FROM test_rewrite_uniq_to_count) t settings allow_experimental_analyzer=1;
|
|
|
|
SELECT '4. test distinct with select expression alias';
|
|
SELECT uniq(alias_of_a) FROM (SELECT DISTINCT a as alias_of_a FROM test_rewrite_uniq_to_count) t settings allow_experimental_analyzer=0;
|
|
EXPLAIN SYNTAX SELECT uniq(alias_of_a) FROM (SELECT DISTINCT a as alias_of_a FROM test_rewrite_uniq_to_count) t settings allow_experimental_analyzer=0;
|
|
SELECT uniq(alias_of_a) FROM (SELECT DISTINCT a as alias_of_a FROM test_rewrite_uniq_to_count) t settings allow_experimental_analyzer=1;
|
|
EXPLAIN QUERY TREE SELECT uniq(alias_of_a) FROM (SELECT DISTINCT a as alias_of_a FROM test_rewrite_uniq_to_count) t settings allow_experimental_analyzer=1;
|
|
|
|
|
|
SELECT '5. test simple group by';
|
|
SELECT uniq(a) FROM (SELECT a, sum(b) FROM test_rewrite_uniq_to_count GROUP BY a) settings allow_experimental_analyzer=0;
|
|
EXPLAIN SYNTAX SELECT uniq(a) FROM (SELECT a, sum(b) FROM test_rewrite_uniq_to_count GROUP BY a) settings allow_experimental_analyzer=0;
|
|
SELECT uniq(a) FROM (SELECT a, sum(b) FROM test_rewrite_uniq_to_count GROUP BY a) settings allow_experimental_analyzer=1;
|
|
EXPLAIN QUERY TREE SELECT uniq(a) FROM (SELECT a, sum(b) FROM test_rewrite_uniq_to_count GROUP BY a) settings allow_experimental_analyzer=1;
|
|
|
|
SELECT '6. test group by with subquery alias';
|
|
SELECT uniq(t.a) FROM (SELECT a, sum(b) FROM test_rewrite_uniq_to_count GROUP BY a) t settings allow_experimental_analyzer=0;
|
|
EXPLAIN SYNTAX SELECT uniq(t.a) FROM (SELECT a, sum(b) FROM test_rewrite_uniq_to_count GROUP BY a) t settings allow_experimental_analyzer=0;
|
|
SELECT uniq(t.a) FROM (SELECT a, sum(b) FROM test_rewrite_uniq_to_count GROUP BY a) t settings allow_experimental_analyzer=1;
|
|
EXPLAIN QUERY TREE SELECT uniq(t.a) FROM (SELECT a, sum(b) FROM test_rewrite_uniq_to_count GROUP BY a) t settings allow_experimental_analyzer=1;
|
|
|
|
SELECT '7. test group by with compound column name';
|
|
SELECT uniq(t.alias_of_a) FROM (SELECT a as alias_of_a, sum(b) FROM test_rewrite_uniq_to_count GROUP BY a) t settings allow_experimental_analyzer=0;
|
|
EXPLAIN SYNTAX SELECT uniq(t.alias_of_a) FROM (SELECT a as alias_of_a, sum(b) FROM test_rewrite_uniq_to_count GROUP BY a) t settings allow_experimental_analyzer=0;
|
|
SELECT uniq(t.alias_of_a) FROM (SELECT a as alias_of_a, sum(b) FROM test_rewrite_uniq_to_count GROUP BY a) t settings allow_experimental_analyzer=1;
|
|
EXPLAIN QUERY TREE SELECT uniq(t.alias_of_a) FROM (SELECT a as alias_of_a, sum(b) FROM test_rewrite_uniq_to_count GROUP BY a) t settings allow_experimental_analyzer=1;
|
|
|
|
SELECT '8. test group by with select expression alias';
|
|
SELECT uniq(t.alias_of_a) FROM (SELECT a as alias_of_a, sum(b) FROM test_rewrite_uniq_to_count GROUP BY alias_of_a) t settings allow_experimental_analyzer=0;
|
|
EXPLAIN SYNTAX SELECT uniq(t.alias_of_a) FROM (SELECT a as alias_of_a, sum(b) FROM test_rewrite_uniq_to_count GROUP BY alias_of_a) t settings allow_experimental_analyzer=0;
|
|
SELECT uniq(t.alias_of_a) FROM (SELECT a as alias_of_a, sum(b) FROM test_rewrite_uniq_to_count GROUP BY alias_of_a) t settings allow_experimental_analyzer=1;
|
|
EXPLAIN QUERY TREE SELECT uniq(t.alias_of_a) FROM (SELECT a as alias_of_a, sum(b) FROM test_rewrite_uniq_to_count GROUP BY alias_of_a) t settings allow_experimental_analyzer=1;
|
|
|
|
drop table if exists test_rewrite_uniq_to_count;
|