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69 lines
5.3 KiB
SQL
69 lines
5.3 KiB
SQL
drop table if exists test_rewrite_uniq_to_count;
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CREATE TABLE test_rewrite_uniq_to_count
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(
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`a` UInt8,
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`b` UInt8,
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`c` UInt8
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) ENGINE = MergeTree ORDER BY `a`;
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INSERT INTO test_rewrite_uniq_to_count values ('1', '1', '1'), ('1', '1', '1');
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INSERT INTO test_rewrite_uniq_to_count values ('2', '2', '2'), ('2', '2', '2');
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INSERT INTO test_rewrite_uniq_to_count values ('3', '3', '3'), ('3', '3', '3');
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set optimize_uniq_to_count=true;
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SELECT '1. test simple distinct';
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SELECT uniq(a) FROM (SELECT DISTINCT a FROM test_rewrite_uniq_to_count) settings allow_experimental_analyzer=0;
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EXPLAIN SYNTAX SELECT uniq(a) FROM (SELECT DISTINCT a FROM test_rewrite_uniq_to_count) settings allow_experimental_analyzer=0;
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SELECT uniq(a) FROM (SELECT DISTINCT a FROM test_rewrite_uniq_to_count) settings allow_experimental_analyzer=1;
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EXPLAIN QUERY TREE SELECT uniq(a) FROM (SELECT DISTINCT a FROM test_rewrite_uniq_to_count) settings allow_experimental_analyzer=1;
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SELECT '2. test distinct with subquery alias';
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SELECT uniq(t.a) FROM (SELECT DISTINCT a FROM test_rewrite_uniq_to_count) t settings allow_experimental_analyzer=0;
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EXPLAIN SYNTAX SELECT uniq(a) FROM (SELECT DISTINCT a FROM test_rewrite_uniq_to_count) t settings allow_experimental_analyzer=0;
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SELECT uniq(t.a) FROM (SELECT DISTINCT a FROM test_rewrite_uniq_to_count) t settings allow_experimental_analyzer=1;
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EXPLAIN QUERY TREE SELECT uniq(t.a) FROM (SELECT DISTINCT a FROM test_rewrite_uniq_to_count) t settings allow_experimental_analyzer=1;
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SELECT '3. test distinct with compound column name';
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SELECT uniq(a) FROM (SELECT DISTINCT test_rewrite_uniq_to_count.a FROM test_rewrite_uniq_to_count) t settings allow_experimental_analyzer=0;
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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;
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SELECT uniq(a) FROM (SELECT DISTINCT test_rewrite_uniq_to_count.a FROM test_rewrite_uniq_to_count) t settings allow_experimental_analyzer=1;
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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;
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SELECT '4. test distinct with select expression alias';
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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;
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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;
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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;
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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;
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SELECT '5. test simple group by';
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SELECT uniq(a) FROM (SELECT a, sum(b) FROM test_rewrite_uniq_to_count GROUP BY a) settings allow_experimental_analyzer=0;
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EXPLAIN SYNTAX SELECT uniq(a) FROM (SELECT a, sum(b) FROM test_rewrite_uniq_to_count GROUP BY a) settings allow_experimental_analyzer=0;
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SELECT uniq(a) FROM (SELECT a, sum(b) FROM test_rewrite_uniq_to_count GROUP BY a) settings allow_experimental_analyzer=1;
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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;
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SELECT '6. test group by with subquery alias';
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SELECT uniq(t.a) FROM (SELECT a, sum(b) FROM test_rewrite_uniq_to_count GROUP BY a) t settings allow_experimental_analyzer=0;
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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;
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SELECT uniq(t.a) FROM (SELECT a, sum(b) FROM test_rewrite_uniq_to_count GROUP BY a) t settings allow_experimental_analyzer=1;
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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;
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SELECT '7. test group by with compound column name';
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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;
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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;
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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;
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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;
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SELECT '8. test group by with select expression alias';
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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;
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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;
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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;
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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;
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drop table if exists test_rewrite_uniq_to_count;
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