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mysql-server/mysql-test/t/subquery_scalar_to_derived.test
Ho Sy Tan 4a107fd10e 2025-03-05 14:31:08
2025-03-05 14:31:37 +07:00

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# Enable transformations for InnoDB for ease of testing
SET optimizer_switch='subquery_to_derived=on';
# This performance schema table is queried further down. Clear it now,
# so that we start with a clean state, regardless of what earlier
# tests have written to it.
TRUNCATE TABLE performance_schema.events_statements_summary_by_digest;
--echo #
--echo # Tests for WL#12885 Add ability to transform scalar subqueries to inner
--echo # derived table
--echo #
CREATE TABLE t1(a INT);
CREATE TABLE t2(a INT);
INSERT INTO t1 VALUES (1),(2),(3),(4);
INSERT INTO t2 VALUES (1),(2);
CREATE TABLE t0 AS SELECT * FROM t1;
CREATE TABLE t3(a INT, b INT);
INSERT INTO t3 VALUES (1,3), (2,3);
ANALYZE TABLE t1, t2, t0, t3;
--echo #
--echo # 1. W H E R E clause subqueries
--echo #
--echo # Implicitly grouped scalar subquery in WHERE clause.
--echo # Automatic transformation to LEFT OUTER join. It is then
--echo # transformed to inner join, and finally the derived table is
--echo # evaluated at optimize or execution time, depending on
--echo # optimization mode.
let $query = SELECT * FROM t1
WHERE t1.a > (SELECT COUNT(a) AS cnt FROM t2);
eval $query;
eval explain $query;
--echo # Equivalent manually recrafted query: same plan as previous
let $query = SELECT t1.* FROM t1 LEFT OUTER JOIN
(SELECT COUNT(a) AS cnt FROM t2) AS derived
ON TRUE
WHERE t1.a > derived.cnt;
eval $query;
eval explain $query;
--echo # Implicitly grouped scalar subquery in WHERE clause of joined
--echo # query, here with LEFT JOIN.
--echo # Query 1: Simplified to inner join
let $query =
SELECT t0.*, t1.* FROM t0 LEFT OUTER JOIN t1 ON t0.a != t1.a
WHERE t1.a > (SELECT COUNT(a) AS cnt FROM t2);
--sorted_result
eval $query;
eval explain $query;
--echo # Query 2: Not simplified to inner join
let $query =
SELECT * FROM t0 LEFT OUTER JOIN t1 on t0.a = t1.a
WHERE t0.a > (SELECT COUNT(a) AS cnt FROM t2);
--sorted_result
eval $query;
eval explain $query;
--echo # Equivalent manually recrafted query: same plan as previous
let $query =
SELECT t0.*, t1.* FROM (t0 LEFT OUTER JOIN t1 ON t0.a != t1.a) LEFT OUTER JOIN
(SELECT COUNT(a) AS cnt FROM t2) AS derived
ON TRUE
WHERE t1.a > derived.cnt;
--sorted_result
eval $query;
eval explain $query;
--echo # With deeper nested subquery (subquery inside an OR)
let $query = SELECT * FROM t1
WHERE t1.a > (SELECT COUNT(a) AS cnt FROM t2) OR t1.a = 2;
eval $query;
eval explain $query;
--echo # More than one subquery in the WHERE condition:
let $query = SELECT t1.* FROM t1
WHERE t1.a > (SELECT COUNT(a) AS cnt FROM t2) AND
t1.a < (SELECT MAX(a) * 4 AS mx FROM t2);
eval $query;
eval explain $query;
--echo # Equivalent manually recrafted query: same plan as previous
let $query = SELECT t1.* FROM t1
LEFT JOIN (SELECT COUNT(a) AS cnt FROM t2) AS lj1 ON TRUE
LEFT JOIN (SELECT MAX(a) * 4 AS mx FROM t2) AS lj2 ON TRUE
WHERE t1.a > cnt AND t1.a < mx;
eval $query;
eval explain $query;
--echo # If we have an implicit grouping we we know that cardinality
--echo # of result set is one, so no need for runtime checking of the
--echo # cardinality of the derived tables
let $query = SELECT * FROM t1
WHERE t1.a > (SELECT COUNT(a) AS cnt FROM t3);
eval $query;
eval explain $query;
--echo # If not, detect if we see more than one row in subquery
let $query = SELECT * FROM t1
WHERE t1.a > (SELECT COUNT(a) AS cnt FROM t3 GROUP BY a);
--error ER_SUBQUERY_NO_1_ROW
eval $query;
eval explain $query;
let $query = SELECT * FROM t1
WHERE t1.a > (SELECT COUNT(a) AS cnt FROM t2 UNION SELECT 1);
--error ER_SUBQUERY_NO_1_ROW
eval $query;
eval explain $query;
--echo # Should work, {2} \ {1} == {2}
let $query = SELECT * FROM t1
WHERE t1.a > (SELECT COUNT(a) AS cnt FROM t2 EXCEPT SELECT 1);
eval $query;
eval explain $query;
--echo # Should fail, {2} U {3} \ {1} == {2, 3}
let $query = SELECT * FROM t1
WHERE t1.a > (SELECT COUNT(a) AS cnt FROM t2 UNION SELECT 3 EXCEPT SELECT 1);
--error ER_SUBQUERY_NO_1_ROW
eval $query;
eval explain $query;
--echo # Should return no rows, since the intersection is the empty set
--echo # {2} ∩ {1} == {}
let $query = SELECT * FROM t1
WHERE t1.a > (SELECT COUNT(a) AS cnt FROM t2 INTERSECT SELECT 1);
eval $query;
eval explain $query;
--echo # Should return no rows, since the result is the empty set
--echo # {2} \ {2} == {}
let $query = SELECT * FROM t1
WHERE t1.a > (SELECT COUNT(a) AS cnt FROM t2 EXCEPT SELECT 2);
eval $query;
eval explain $query;
--echo # This should give one row: {2} ∩ {2} == {2}
let $query = SELECT * FROM t1
WHERE t1.a > (SELECT COUNT(a) AS cnt FROM t2 INTERSECT SELECT 2);
eval $query;
eval explain $query;
--echo # This should give one row: {2} ∩ {2} == {2}
let $query = SELECT * FROM t1
WHERE t1.a > (SELECT COUNT(a) AS cnt FROM t2 INTERSECT ALL SELECT 2);
eval $query;
eval explain $query;
--echo # This should remove the duplicate: {1, 1} ∩ALL {1} == {1}, so ok
let $query = SELECT * FROM t1
WHERE t1.a > ((SELECT COUNT(a) AS cnt FROM t2 GROUP BY a LIMIT 2) INTERSECT ALL SELECT 1);
eval $query;
eval explain $query;
--echo # ditto
let $query = SELECT * FROM t1
WHERE t1.a > (SELECT COUNT(a) AS cnt FROM t2 GROUP BY a INTERSECT ALL SELECT 1);
eval $query;
eval explain $query;
--echo # Empty scalar subquery
let $query = SELECT * FROM t1
WHERE t1.a > (SELECT a from t1 WHERE false);
eval $query;
eval explain $query;
let $query = SELECT a + (SELECT a from t1 WHERE false) FROM t1;
eval $query;
eval explain $query;
--echo # If we limit the cardinality, it should work:
let $query = SELECT * FROM t1
WHERE t1.a > (SELECT COUNT(a) AS cnt FROM t2 UNION SELECT 1 LIMIT 1);
eval $query;
eval explain $query;
--echo # Check that offset/limit doesn't fool us:
let $query = SELECT * FROM t1
WHERE t1.a > (SELECT COUNT(a) AS cnt FROM t2 UNION SELECT 1 LIMIT 1 OFFSET 1);
eval $query;
eval explain $query;
let $query = SELECT * FROM t1
WHERE t1.a > (SELECT COUNT(a) AS cnt FROM t2 UNION SELECT 1 LIMIT 1 OFFSET 0);
eval $query;
eval explain $query;
let $query = SELECT * FROM t1
WHERE t1.a > (SELECT COUNT(a) AS cnt FROM t2 UNION SELECT 1 LIMIT 2 OFFSET 0);
--error ER_SUBQUERY_NO_1_ROW
eval $query;
eval explain $query;
let $query = SELECT * FROM t1
WHERE t1.a > (SELECT COUNT(a) AS cnt FROM t2 UNION SELECT 1 LIMIT 2 OFFSET 1);
eval $query;
eval explain $query;
let $query = SELECT * FROM t1
WHERE t1.a > (SELECT COUNT(a) AS cnt FROM t2 UNION (SELECT 1 LIMIT 1));
--error ER_SUBQUERY_NO_1_ROW
eval $query;
eval explain $query;
--echo Without aggregation
let $query = SELECT * FROM t1
WHERE t1.a > (SELECT a FROM t2 LIMIT 1);
eval $query;
eval explain $query;
let $query = SELECT * FROM t1
WHERE t1.a > (SELECT a FROM t2);
--error ER_SUBQUERY_NO_1_ROW
eval $query;
eval explain $query;
--echo In the below, the query block under consideration for transformation is
--echo the outer subquery. It
--echo
--echo a) contains a scalar subquery in its select list
--echo b) is implicitly grouped, cf. SUM(a)
--echo
--echo so we trigger an attempt to put the grouping into a separate derived
--echo table. But we also see that it contains an aggregate that has an outer
--echo reference, SUM(t3.a), so we leave it untouched.
EXPLAIN
SELECT (SELECT SUM(a) + (SELECT SUM(t1.a) FROM t1) + SUM(t3.a) FROM t2) FROM t3;
--echo Don't try transform grouping into a derived table if we have a reference
--echo to the scalar subquery in the HAVING clause
EXPLAIN
SELECT SUM(a), (SELECT SUM(b) FROM t3) scalar FROM t1 HAVING SUM(a) > scalar;
--echo #
--echo # Check that we disable transform if we set a user variable in the query
--echo # cf. WL#12885 requirement FR#6.
--echo #
EXPLAIN SELECT t1.a + (@foo:=3) FROM t1
WHERE t1.a > (SELECT COUNT(a) AS cnt FROM t2);
--echo #
--echo # Check that RAND precludes transform
--echo #
let $query =
SELECT DISTINCT 3 + (SELECT COUNT(a) + RAND() FROM t1) FROM t1;
eval explain $query;
eval SELECT COUNT(*) > 1 FROM ($query) AS dt;
--echo #
--echo # 1.1 J O I N C O N D I T I O N containing scalar subquery
--echo #
let query = SELECT t1.a, t2.a
FROM t1
JOIN t2
ON t1.a+t2.a = (SELECT COUNT(*) FROM t1);
--sorted_result
eval $query;
eval explain $query;
let query = SELECT t1.a, t2.a, t3.a
FROM t1
JOIN t2
ON t1.a+t2.a = (SELECT COUNT(*) FROM t1)
JOIN t3
ON t1.a + (SELECT MIN(a) FROM t1) = t3.b;
--sorted_result
eval $query;
eval explain $query;
--echo OUTER join
let query = SELECT t1.a, t2.a, t3.a
FROM t1
LEFT JOIN ( t2
JOIN t3
ON t2.a = (SELECT COUNT(*) FROM t1) )
ON t1.a + (SELECT MIN(a) FROM t1) = t3.b;
eval $query;
eval explain $query;
# verify result with ordinary execution path
SET optimizer_switch='subquery_to_derived=default';
eval $query;
SET optimizer_switch='subquery_to_derived=on';
--echo This is a manually transformed version of the above.
let query =
SELECT t1.a, t2.a, t3.a
FROM t1
LEFT JOIN (SELECT MIN(a) FROM t1) derived_1
ON TRUE
LEFT JOIN ( t2
LEFT JOIN (SELECT COUNT(*) FROM t1) AS derived_2
ON TRUE
JOIN t3
ON t2.a = derived_2.`COUNT(*)` )
ON t1.a + derived_1.`MIN(a)` = t3.b;
eval $query;
eval explain $query;
let query = SELECT t1.a, t2.a, t3.a
FROM t1
STRAIGHT_JOIN ( t2
STRAIGHT_JOIN t3
ON t2.a = (SELECT COUNT(*) FROM t1) )
ON t1.a + (SELECT MIN(a) FROM t1) = t3.b;
eval $query;
eval explain $query;
--echo #
--echo # 2. S E L E C T list expression subqueries
--echo #
let $query = SELECT a + (SELECT -SUM(a) FROM t1) AS cnt FROM t2;
eval $query;
eval explain $query;
--echo # Equivalent manually recrafted query: same plan as previous
let $query = SELECT a + derived.cnt
FROM t2
LEFT OUTER JOIN (SELECT -SUM(a) AS cnt FROM t1) AS derived
ON TRUE;
--sorted_result
eval $query;
eval explain $query;
--echo #
--echo # 2.1 S E L E C T list expression subqueries and UNION
--echo #
let $query = SELECT a + (SELECT SUM(a) FROM t1) FROM t1 UNION ALL
SELECT a + (SELECT SUM(a) FROM t1) FROM t1;
eval $query;
eval explain $query;
--echo #
--echo # 3. N E S T E D scalar subqueries
--echo #
let $query = SELECT a + (SELECT SUM(a) + (SELECT COUNT(a) FROM t1) FROM t1) AS cnt FROM t2;
eval $query;
eval explain $query;
--echo # Equivalent manually recrafted query: same plan as previous
let $query =
SELECT (t2.a + derived_1_0.sum_plus_cnt) AS cnt
FROM t2
LEFT JOIN (SELECT (derived_2_0.tmp_aggr_1 + derived_2_1.count_a) AS sum_plus_cnt
FROM (SELECT STRAIGHT_JOIN SUM(t1.a) AS tmp_aggr_1 from t1) derived_2_0
LEFT JOIN (SELECT COUNT(t1.a) AS count_a from t1) derived_2_1
ON TRUE) derived_1_0
ON TRUE;
--sorted_result
eval $query;
eval explain $query;
# This query actually belongs in group 5 below. It has an original
# derived table and crashed at one point, so include here anyway,
# before we drop these base tables.
SELECT a + (SELECT SUM(a) + (SELECT COUNT(a) FROM t1)
FROM (SELECT * from t1) t11) AS cnt FROM t2;
SELECT AVG(a) OVER () AS `avg`,
a + (SELECT SUM(a) + (SELECT COUNT(a) FROM t1)
FROM (SELECT * from t1) t11) AS cnt FROM t2;
DROP TABLE t0, t1, t2, t3;
--echo #
--echo # 4. C O R R E L A T E D query to derived with LATERAL
--echo #
--echo # Note: this feature has been disabled for WL#12885.
--echo # The tests are kept in case we re-enable this transformation
--echo #
CREATE TABLE t1(a INT, b INT);
INSERT INTO t1 (a) VALUES (1), (2);
CREATE TABLE t2 SELECT * FROM t1;
ANALYZE TABLE t1, t2;
let $query =
SELECT (WITH RECURSIVE dt AS (SELECT t1.a AS a UNION
SELECT a+1 FROM dt WHERE a<10)
SELECT t1.a * CONCAT(COUNT(*), '.', FLOOR(AVG(dt.a)))
FROM dt) AS subq
FROM t1;
eval $query;
eval explain $query;
--echo # Equivalent manually recrafted query: same plan as previous
let $query =
SELECT derived0.cnct AS subq
FROM t1
LEFT JOIN LATERAL (WITH RECURSIVE dt AS (SELECT t1.a AS a UNION
SELECT (dt.a + 1)
FROM dt WHERE dt.a < 10)
SELECT t1.a * CONCAT(COUNT(0), '.', FLOOR(AVG(dt.a))) AS cnct
FROM dt) derived0
ON TRUE;
--sorted_result
eval $query;
eval explain $query;
DROP TABLE t1, t2;
--echo # Detect correlation outside of transformed query block which
--echo # is not caught by the scalar aggregate function inspection in
--echo # Item_singlerow_subselect::collect_scalar_subqueries. If there
--echo # is such a subquery, we skip transformation of that block.
CREATE TABLE t1(i INT);
CREATE TABLE t2(a INT);
CREATE TABLE t3(x INT);
ANALYZE TABLE t1, t2, t3;
EXPLAIN
SELECT (
SELECT (SELECT COUNT(*) FROM t2) +
(SELECT AVG(a)
FROM t2
WHERE t2.a = t3.x) AS aggs
FROM t1
) AS bignest
FROM t3;
--echo # Without that subquery, we transform the level 2 query block,
--echo # but the the outermost still contains its subquery.
EXPLAIN
SELECT (
SELECT (SELECT COUNT(*) FROM t2) AS aggs
FROM t1
) AS bignest
FROM t3;
DROP TABLE t1, t2, t3;
--echo #
--echo # 5. S U B Q U E R Y I N S E L E C T L I S T + G R O U P E D
--echo # O U T E R Q U E R Y
--echo #
CREATE TABLE t1 (a INT NOT NULL, b SMALLINT);
INSERT INTO t1 VALUES (12,12);
ANALYZE TABLE t1;
--echo # subquery is separate in SELECT list
let $query =
SELECT (SELECT COUNT(*)
FROM t1
WHERE a=11725) AS tot,
IFNULL(MAX(b),0)+1 + 5 AS mx
FROM t1
WHERE false;
eval $query;
eval explain $query;
--echo # subquery is part of expression with aggregate in SELECT list
let $query =
SELECT (SELECT COUNT(*)
FROM t1
WHERE a=11725) +
IFNULL(MAX(b),0)+1 + 5 AS mx
FROM t1
WHERE false;
eval $query;
eval explain $query;
INSERT INTO t1 VALUES (13, 12);
--echo # outer query has DISTINCT, verify it is retained
let $query =
SELECT DISTINCT (SELECT COUNT(*)
FROM t1) +
IFNULL(MAX(b),0)+1 + 5 AS mx
FROM t1
WHERE a > 5
GROUP BY a;
eval $query;
eval explain $query;
--echo # outer query has LIMIT: verify it is retained
let $query =
SELECT (SELECT COUNT(*)
FROM t1) +
IFNULL(MAX(b),0)+1 + 5 AS mx
FROM t1
GROUP BY a LIMIT 1;
eval $query;
eval explain $query;
--echo # The subquery under under consideration for transformation contains a
--echo # aggregate function (MIN(t1_outer.a) and we have no explicit grouping,
--echo # so it would a priori be a candidate putting in a derived table. But
--echo # here, the aggregation function is aggregated in a query block outer to
--echo # the one being transformed. This means we do not need to push it into a
--echo # derived table.
let $query =
SELECT
(SELECT (SELECT COUNT(*)
FROM t1) +
MAX(t1.b) + MIN(t1_outer.a) AS tot
FROM t1) FROM t1 AS t1_outer;
eval $query;
eval explain $query;
--echo # Aggregate aggregates in the transformation query block, but is
--echo # contained in a subquery. Currently, this blocks transformation, but can
--echo # be fixed if we let Item::transform visit subqueries.
let $query =
SELECT (SELECT COUNT(*)
FROM t1) +
MAX(b) +
(SELECT MIN(a) + AVG(top.a) FROM t1)
AS tot
FROM t1 top;
eval $query;
eval explain $query;
--echo # correlated version:
--echo # explicit grouping, no need for moving the grouping down into a
--echo # derived table
let $query =
SELECT (SELECT COUNT(*) + `outer`.a
FROM t1) +
IFNULL(MAX(b),0)+1 + 5 AS mx
FROM t1 AS `outer`
GROUP BY a;
eval $query;
eval explain $query;
--echo Translated first step by hand
SELECT (SELECT COUNT(*) + derived_1.d_1 FROM t1) +
IFNULL(derived_1.`MAX(b)`,0) + 1 + 5 AS mx
FROM (SELECT STRAIGHT_JOIN MAX(outer_t.b) AS `MAX(b)`,
outer_t.a AS d_1
FROM t1 outer_t
GROUP BY outer_t.a) derived_1;
--echo Translated by hand
SELECT (derived_1.`COUNT(*) + outer_t.a` +
IFNULL(derived_0.`MAX(b)`,0)) + 1 + 5 AS mx
FROM (SELECT STRAIGHT_JOIN MAX(outer_t.b) AS `MAX(b)`,
outer_t.a AS d_1
FROM t1 outer_t
GROUP BY outer_t.a) derived_0
LEFT JOIN LATERAL (SELECT (COUNT(0) + derived_0.d_1)
AS `COUNT(*) + outer_t.a`
FROM t1) derived_1
ON(true)
WHERE true;
--echo # correlated version, with outer aggregate, not transformed
let $query =
SELECT (SELECT COUNT(*) + MAX(outer_t.b)
FROM t1) +
IFNULL(MAX(b),0)+1 + 5 AS mx
FROM t1 AS outer_t
GROUP BY a;
eval $query;
eval explain $query;
DROP TABLE t1;
--echo #
--echo # More complex example
--echo #
CREATE VIEW events_digest AS
SELECT * FROM performance_schema.events_statements_summary_by_digest;
--replace_regex /^[\t.0-9]*$/xxxxx/
SELECT s2.avg_us avg_us,
IFNULL(SUM(s1.cnt)/NULLIF((SELECT COUNT(*) FROM
events_digest), 0), 0) percentile
FROM sys.`x$ps_digest_avg_latency_distribution` AS s1
JOIN sys.`x$ps_digest_avg_latency_distribution` AS s2
ON s1.avg_us <= s2.avg_us
GROUP BY s2.avg_us
HAVING IFNULL(SUM(s1.cnt)/ NULLIF((SELECT COUNT(*) FROM events_digest), 0), 0) > 0.95
ORDER BY percentile LIMIT 1;
# redundantly repeated query here, but "$query = ;" plus "eval $query"
# loses backticks
EXPLAIN
SELECT s2.avg_us avg_us,
IFNULL(SUM(s1.cnt)/NULLIF((SELECT COUNT(*) FROM
events_digest), 0), 0) percentile
FROM sys.`x$ps_digest_avg_latency_distribution` AS s1
JOIN sys.`x$ps_digest_avg_latency_distribution` AS s2
ON s1.avg_us <= s2.avg_us
GROUP BY s2.avg_us
HAVING IFNULL(SUM(s1.cnt)/ NULLIF((SELECT COUNT(*) FROM events_digest), 0), 0) > 0.95
ORDER BY percentile LIMIT 1;
--echo # Manually translated, equivalent query (except we need to
--echo # include the derived_1_1.`COUNT(*)` in the select list for it
--echo # to be resolvable in the HAVING clause), and we need to
--echo # disable strict group checking: safe, but not recognized as
--echo # such by server..
SET sql_mode='';
EXPLAIN
SELECT s2.avg_us AS avg_us,
IFNULL((SUM(s1.cnt) / NULLIF(derived_1_0.`COUNT(*)`,0)),0) AS percentile,
derived_1_1.`COUNT(*)`
FROM sys.`x$ps_digest_avg_latency_distribution` s1 JOIN
sys.`x$ps_digest_avg_latency_distribution` s2 LEFT JOIN
(SELECT COUNT(0) AS `COUNT(*)`
FROM performance_schema.events_statements_summary_by_digest) derived_1_0
ON(TRUE) LEFT JOIN
(SELECT COUNT(0) AS `COUNT(*)`
FROM performance_schema.events_statements_summary_by_digest) derived_1_1
ON(TRUE)
WHERE (s1.avg_us <= s2.avg_us)
GROUP BY s2.avg_us
HAVING (IFNULL((SUM(s1.cnt) / NULLIF(derived_1_1.`COUNT(*)`,0)),0) > 0.95)
ORDER BY percentile LIMIT 1;
SET sql_mode=default;
--echo # outer query has window: verify it is retained on outer level
--replace_regex /^[\t.0-9]*$/xxxxx/
SELECT AVG(s2.avg_us) OVER () + 3 AS avgsum,
s2.avg_us avg_us,
s2.avg_us avg_us2,
SUM(s2.avg_us) OVER () + 3 AS avgsum2,
IFNULL(SUM(s1.cnt)/NULLIF((SELECT COUNT(*) FROM
events_digest), 0), 0) percentile
FROM sys.`x$ps_digest_avg_latency_distribution` AS s1
JOIN sys.`x$ps_digest_avg_latency_distribution` AS s2
ON s1.avg_us <= s2.avg_us
GROUP BY s2.avg_us
HAVING IFNULL(SUM(s1.cnt)/ NULLIF((SELECT COUNT(*) FROM events_digest), 0), 0) > 0.95
ORDER BY percentile LIMIT 1;
DROP VIEW events_digest;
--echo # An example with aggregates in ORDER BY and HAVING not seen in SELECT list
CREATE TABLE t1 (
school_name VARCHAR(45) NOT NULL,
country VARCHAR(45) NOT NULL,
funds_requested FLOAT NOT NULL,
schooltype VARCHAR(45) NOT NULL
);
INSERT INTO t1 VALUES ("the school", "USA", 1200, "Human");
ANALYZE TABLE t1;
let $query=
SELECT COUNT(country) AS countrycount,
SUM(funds_requested) AS smcnt,
country,
(SELECT SUM(funds_requested) FROM t1) AS total_funds,
ROW_NUMBER() OVER (ORDER BY STDDEV_POP(funds_requested)) AS rn
FROM t1
GROUP BY country
HAVING AVG(funds_requested) > 0
ORDER BY SUM(ABS(funds_requested));
eval $query;
eval EXPLAIN $query;
SET sql_mode='';
let $query=
SELECT COUNT(country) AS countrycount,
SUM(funds_requested) AS smcnt,
country,
(SELECT SUM(funds_requested) FROM t1) AS total_funds,
ROW_NUMBER() OVER (ORDER BY STDDEV_POP(funds_requested)) AS rn
FROM t1
HAVING AVG(funds_requested) > 0
ORDER BY SUM(ABS(funds_requested));
eval $query;
eval EXPLAIN $query;
--echo Manually translated
SELECT derived_1_0.countrycount AS countrycount,
derived_1_0.smcnt AS smcnt,
derived_1_0.d_1 AS country,
derived_1_1.`SUM(funds_requested)` AS total_funds,
row_number() OVER (ORDER BY derived_1_1.`SUM(funds_requested)` ) AS rn
FROM (SELECT COUNT(t1.country) AS countrycount,
SUM(t1.funds_requested) AS smcnt,
AVG(t1.funds_requested) AS tmp_aggr_1,
STD(t1.funds_requested) AS tmp_aggr_2,
t1.country AS d_1
FROM t1
HAVING (AVG(t1.funds_requested) > 0)) derived_1_0
LEFT JOIN
(SELECT SUM(t1.funds_requested) AS `SUM(funds_requested)`
FROM t1) derived_1_1
ON(TRUE);
SET sql_mode=default;
DROP TABLE t1;
--echo # Cause for introducing TABLE_LIST::m_was_grouped2derived:
--echo # EXECUTE would assert if we didn't have it.
CREATE TABLE cc (i INT);
INSERT INTO cc VALUES (1);
ANALYZE TABLE cc;
let $query=
SELECT (SELECT COUNT(i) FROM cc AS cc_alias
WHERE (cc.i IN (SELECT cc_alias.i FROM cc))) AS cnt
FROM cc
GROUP BY i;
eval $query;
eval EXPLAIN $query;
#Remove commented out code FIXME.
#eval PREPARE stmt FROM "$query";
#EXECUTE stmt;
#
#DROP PREPARE stmt;
DROP TABLE cc;
--echo # Test: detect correlated aggregates deep inside scalar subquery (was
--echo # missed before we let has_correlated_aggregate walk subqueries
CREATE TABLE t (a INT);
INSERT INTO t VALUES (1);
ANALYZE TABLE t;
--echo # should be left untouched, since COUNT(q.i) aggregates in the
--echo # outermost SELECT
EXPLAIN SELECT (
SELECT GROUP_CONCAT((SELECT COUNT(q.i) FROM t))
FROM t) AS i
FROM (SELECT a AS i FROM t) q;
DROP TABLE t;
--echo
--echo # IN to EXISTS transformation makes us skip subquery_to_derived.
--echo
CREATE TABLE t1 (a INT NOT NULL, b INT NOT NULL);
CREATE TABLE t2 (c INT NOT NULL, d INT NOT NULL);
CREATE TABLE t3 (e INT NOT NULL);
INSERT INTO t1 VALUES (1,10), (2,10), (1,20), (2,20), (3,20), (2,30), (4,40);
INSERT INTO t2 VALUES (2,10), (2,20), (4,10), (5,10), (3,20), (2,40);
INSERT INTO t3 VALUES (10), (30), (10), (20);
ANALYZE TABLE t1, t2, t3;
let $query =
SELECT * FROM t1 AS ta
WHERE ta.a IN (SELECT c FROM t2 AS tb
WHERE (SELECT MIN(e) FROM t3 as tc
WHERE tc.e IS NOT NULL) < SOME(SELECT e FROM t3 as tc
WHERE ta.b=tc.e));
eval $query;
eval EXPLAIN $query;
--echo #
--echo # Two parallel scalar subqueries + grouping to derived table
--echo #
let $query =
SELECT SUM(t1.a) + (SELECT SUM(t2.c)
FROM t2),
(SELECT COUNT(t3.e) FROM t3)
FROM t1;
eval $query;
eval EXPLAIN $query;
DROP TABLE t1, t2, t3;
--echo # Bug discovered from running rapid.cp_i_subquery.test What is
--echo # different here is that we have a combination of an implicitly
--echo # grouped query + a scalar subquery in the select list + the top block
--echo # has an IN subquery in the WHERE clause. The WHERE clause gets
--echo # moved into the derived table for the grouping, but this move didn't
--echo # account for the semijoin already determined for the top level, which
--echo also has to go into the new derived table.
CREATE TABLE t1(
pedcompralote INT NOT NULL,
pedcompraseq SMALLINT
);
INSERT INTO t1 VALUES (12,12);
CREATE TABLE t2(
cod INT NOT NULL,
ped INT,
PRIMARY KEY (cod),
KEY ped (ped)
);
INSERT INTO t2 VALUES
(11724,1779), (11725,1779), (11726,1779), (11727,1779),
(11728,1779), (11729,1779), (11730,1779), (11731,1779);
SELECT (SELECT COUNT(*)
FROM t1
WHERE pedcompralote=11725) AS tot,
IFNULL(MAX(pedcompraseq),0)+1 AS newcode
FROM t1
WHERE pedcompralote IN (SELECT cod FROM t2 WHERE ped=1779);
DROP TABLE t1, t2;
--echo # outer query has DEFAULT: verify it is handled correctly
CREATE TABLE t(i INT DEFAULT 5);
INSERT INTO t VALUES (4);
ANALYZE TABLE t;
let $query =
SELECT DEFAULT(i) AS def,
5 + DEFAULT(i) AS def2,
i AS any_v,
(SELECT i FROM t) AS subquery,
SUM(i) AS summ
FROM t;
--error ER_MIX_OF_GROUP_FUNC_AND_FIELDS
eval $query;
SET SQL_MODE='';
eval $query;
eval EXPLAIN $query;
SET SQL_MODE=default;
--echo # Bug#35150438 Unwarranted error message for ANY_VALUE with
--echo # scalar subquery transform
let $query =
SELECT ANY_VALUE(i) AS i1,
(SELECT i FROM t) AS subquery,
SUM(i) AS summ
FROM t;
eval $query;
eval EXPLAIN $query;
--error ER_MIX_OF_GROUP_FUNC_AND_FIELDS
SELECT i + ANY_VALUE(i) AS i1,
(SELECT i FROM t) AS subquery,
SUM(i) AS summ
FROM t;
--error ER_MIX_OF_GROUP_FUNC_AND_FIELDS
SELECT ANY_VALUE(i) + i AS i1,
(SELECT i FROM t) AS subquery,
SUM(i) AS summ
FROM t;
let $query =
SELECT ANY_VALUE(ANY_VALUE(i) + i) AS i1,
(SELECT i FROM t) AS subquery,
SUM(i) AS summ
FROM t;
eval $query;
eval EXPLAIN $query;
--error ER_MIX_OF_GROUP_FUNC_AND_FIELDS
SELECT ANY_VALUE(i) AS i1, i as i2,
(SELECT i FROM t) AS subquery,
SUM(i) AS summ
FROM t;
--error ER_MIX_OF_GROUP_FUNC_AND_FIELDS
SELECT i as i2, ANY_VALUE(i) AS i1,
(SELECT i FROM t) AS subquery,
SUM(i) AS summ
FROM t;
let $query =
SELECT ANY_VALUE(i) as i2, ANY_VALUE(i) AS i1,
(SELECT i FROM t) AS subquery,
SUM(i) AS summ
FROM t;
eval $query;
eval EXPLAIN $query;
DROP TABLE t;
--echo #
--echo # 6. S U B Q U E R Y I N H A V I N G C L A U S E
--echo #
CREATE TABLE t1(i int, j int);
CREATE TABLE t2(i int);
INSERT INTO t1 VALUES (1, 10);
INSERT INTO t1 VALUES (1, 20);
INSERT INTO t1 VALUES (1, 30);
INSERT INTO t1 VALUES (2, 11);
INSERT INTO t1 VALUES (2, 20);
INSERT INTO t1 VALUES (2, 30);
INSERT INTO t2 VALUES (25);
ANALYZE TABLE t1, t2;
--echo Implicit grouping, HAVING: no transform
let $query=
SELECT SUM(j) FROM t1
HAVING SUM(j) > (SELECT SUM(t2.i) FROM t2);
eval $query;
eval EXPLAIN $query;
--echo Only HAVING is ok to transform, no implicit grouping
let $query=
SELECT j FROM t1
HAVING j > (SELECT MIN(t2.i) FROM t2);
eval $query;
eval EXPLAIN $query;
--echo HAVING and GROUP BY, also ok
let $query=
SELECT i, j FROM t1
GROUP BY i, j
HAVING SUM(j) > (SELECT SUM(t2.i) FROM t2);
eval $query;
eval EXPLAIN $query;
--echo HAVING, GROUP BY and ROLLUP
let $query=
SELECT i, j FROM t1
GROUP BY i, j WITH ROLLUP
HAVING SUM(j) > (SELECT SUM(t2.i) FROM t2);
eval $query;
eval EXPLAIN $query;
DROP TABLE t1, t2;
--echo Bigger example (TPC-H Q11) where we get a scalar transformation
--echo in the grouping derived table also, i.e. nested scalar to
--echo derived transformation.
CREATE TABLE supplier (
s_suppkey INT NOT NULL,
s_nationkey BIGINT NOT NULL,
PRIMARY KEY (s_suppkey)
);
CREATE TABLE nation (
n_nationkey INT NOT NULL,
n_name CHAR(25) DEFAULT NULL,
PRIMARY KEY (n_nationkey)
);
CREATE TABLE partsupp (
ps_partkey BIGINT NOT NULL,
ps_suppkey BIGINT NOT NULL,
ps_availqty INT DEFAULT NULL,
ps_supplycost DECIMAL(10,0) DEFAULT NULL,
PRIMARY KEY (ps_partkey, ps_suppkey)
);
INSERT INTO nation VALUES (1, 'germany'),
(2, 'norway'),
(3, 'u.k.');
INSERT INTO supplier VALUES (1, 1);
INSERT INTO partsupp VALUES
(1, 1, 10, 555),
(2, 1, 1, 2222),
(3, 1, 300, 700),
(4, 1, 259, 400),
(5, 1, 20, 400),
(6, 1, 1000, 300),
(7, 1, 30, 700);
ANALYZE TABLE supplier, nation, partsupp;
let $query=
SELECT
ps_partkey,
SUM(ps_supplycost * ps_availqty) AS value
FROM
partsupp,
supplier,
nation
WHERE
ps_suppkey = s_suppkey AND
s_nationkey = n_nationkey AND
n_name = 'germany'
GROUP BY
ps_partkey HAVING
SUM(ps_supplycost * ps_availqty) > (
SELECT
SUM(ps_supplycost * ps_availqty) * 0.1
FROM
partsupp,
supplier,
nation
WHERE
ps_suppkey = s_suppkey AND
s_nationkey = n_nationkey AND
n_name = 'germany'
)
ORDER BY value DESC;
eval $query;
eval EXPLAIN $query;
DROP TABLE partsupp, nation, supplier;
--echo Bugs discovered during full regression suite runs with
--echo transformation enabled, selectively repeated here, since we
--echo won't be running InnoDB with transformation enabled normally.
--echo Bug 1
CREATE TABLE tbl1 (
login INT NOT NULL,
numb DECIMAL(15,2) NOT NULL DEFAULT '0.00',
PRIMARY KEY (login),
KEY numb (numb)
);
CREATE TABLE tbl2 (
login INT NOT NULL,
cmd TINYINT NOT NULL,
nump DECIMAL(15,2) NOT NULL DEFAULT '0.00',
KEY cmd (cmd),
KEY login (login)
);
SET autocommit = 0;
START TRANSACTION;
let $i=500;
while ($i)
{
--eval insert into tbl1 values($i, '$i.$j')
dec $i;
}
let $i=500;
while ($i)
{
--eval insert into tbl2 values($i, $i%127,'$i.$j')
dec $i;
}
COMMIT;
SET autocommit = default;
ANALYZE TABLE tbl1, tbl2;
let $query=
SELECT
t1.login AS tlogin,
numb -
IFNULL((SELECT sum(nump) FROM tbl2 WHERE login=t1.login), 0) -
IFNULL((SELECT sum(nump) FROM tbl2 WHERE login=t1.login), 0) as sp
FROM tbl1 t1, tbl2 t2
WHERE t1.login=t2.login
GROUP BY t1.login
LIMIT 5;
eval $query;
eval EXPLAIN $query;
let $query=
SELECT
t1.login AS tlogin,
numb -
IFNULL((SELECT sum(nump) FROM tbl2 WHERE login=t1.login), 0) -
IFNULL((SELECT sum(nump) FROM tbl2 WHERE login=t1.login), 0) as sp
FROM tbl1 t1, tbl2 t2
WHERE t1.login=t2.login
GROUP BY t1.login
ORDER BY sp
LIMIT 5;
eval $query;
eval EXPLAIN $query;
let $query=
SELECT
t1.login AS tlogin,
numb -
IFNULL((SELECT sum(nump) FROM tbl2 WHERE login=t1.login), 0) -
IFNULL((SELECT sum(nump) FROM tbl2 WHERE login=t1.login), 0) as sp
FROM tbl1 t1, tbl2 t2
WHERE t1.login=t2.login
GROUP BY t1.login
ORDER BY numb - IFNULL((SELECT sum(nump) FROM tbl2 WHERE login=t1.login), 0)
- IFNULL((SELECT sum(nump) FROM tbl2 WHERE login=t1.login), 0)
LIMIT 5;
eval $query;
eval EXPLAIN $query;
DROP TABLE tbl1, tbl2;
--echo Bug 2
CREATE TABLE t2 (a INT, b INT);
CREATE TABLE t4 (a INT NOT NULL, b INT NOT NULL);
INSERT INTO t2 VALUES (1, 7), (2, 7), (2,10);
INSERT INTO t4 VALUES (4, 8), (3, 8), (5, 9), (12, 7), (1, 7),
(10, 9), (9, 6), (7, 6), (3, 9), (1, 10);
ANALYZE TABLE t2, t4;
let $query=
SELECT b, MAX(a) AS ma FROM t4
GROUP BY b HAVING ma < (SELECT MAX(t2.a) FROM t2 WHERE t2.b=t4.b);
eval $query;
eval EXPLAIN $query;
DROP TABLE t2, t4;
--echo Bug 3
--echo
--echo This query was caused an issue at one point, while we
--echo still tried to moved explicit grouping into a derived table.
--echo Should work fine now.
CREATE TEMPORARY TABLE tmp_digests (
schema_name VARCHAR(64) DEFAULT NULL,
digest VARCHAR(64) DEFAULT NULL,
digest_text LONGTEXT,
count_star BIGINT UNSIGNED NOT NULL,
sum_timer_wait BIGINT UNSIGNED NOT NULL,
min_timer_wait BIGINT UNSIGNED NOT NULL,
avg_timer_wait BIGINT UNSIGNED NOT NULL,
max_timer_wait BIGINT UNSIGNED NOT NULL,
sum_lock_time BIGINT UNSIGNED NOT NULL,
sum_errors BIGINT UNSIGNED NOT NULL,
sum_warnings BIGINT UNSIGNED NOT NULL,
sum_rows_affected BIGINT UNSIGNED NOT NULL,
sum_rows_sent BIGINT UNSIGNED NOT NULL,
sum_rows_examined BIGINT UNSIGNED NOT NULL,
sum_created_tmp_disk_tables BIGINT UNSIGNED NOT NULL,
sum_created_tmp_tables BIGINT UNSIGNED NOT NULL,
sum_select_full_join BIGINT UNSIGNED NOT NULL,
sum_select_full_range_join BIGINT UNSIGNED NOT NULL,
sum_select_range BIGINT UNSIGNED NOT NULL,
sum_select_range_check BIGINT UNSIGNED NOT NULL,
sum_select_scan BIGINT UNSIGNED NOT NULL,
sum_sort_merge_passes BIGINT UNSIGNED NOT NULL,
sum_sort_range BIGINT UNSIGNED NOT NULL,
sum_sort_rows BIGINT UNSIGNED NOT NULL,
sum_sort_scan BIGINT UNSIGNED NOT NULL,
sum_no_index_used BIGINT UNSIGNED NOT NULL,
sum_no_good_index_used BIGINT UNSIGNED NOT NULL,
sum_cpu_time BIGINT UNSIGNED NOT NULL,
max_controlled_memory BIGINT UNSIGNED NOT NULL,
max_total_memory BIGINT UNSIGNED NOT NULL,
count_secondary BIGINT UNSIGNED NOT NULL,
first_seen TIMESTAMP NULL DEFAULT NULL,
last_seen TIMESTAMP NULL DEFAULT NULL,
quantile_95 BIGINT UNSIGNED NOT NULL,
quantile_99 BIGINT UNSIGNED NOT NULL,
quantile_999 BIGINT UNSIGNED NOT NULL,
query_sample_text longtext,
query_sample_seen TIMESTAMP NULL DEFAULT NULL,
query_sample_timer_wait BIGINT UNSIGNED NOT NULL,
INDEX (schema_name, digest)
) DEFAULT CHARSET=utf8mb4;
INSERT INTO tmp_digests SELECT * FROM performance_schema.events_statements_summary_by_digest;
CREATE TEMPORARY TABLE tmp_digest_avg_latency_distribution1 (
cnt BIGINT UNSIGNED NOT NULL,
avg_us DECIMAL(21,0) NOT NULL,
PRIMARY KEY (avg_us)
) ENGINE=InnoDB;
CREATE TEMPORARY TABLE tmp_digest_avg_latency_distribution2 (
cnt BIGINT UNSIGNED NOT NULL,
avg_us DECIMAL(21,0) NOT NULL,
PRIMARY KEY (avg_us)
) ENGINE=InnoDB;
INSERT INTO tmp_digest_avg_latency_distribution1
SELECT COUNT(*) cnt,
ROUND(avg_timer_wait/1000000) AS avg_us
FROM tmp_digests
GROUP BY avg_us;
INSERT INTO tmp_digest_avg_latency_distribution2 SELECT * FROM tmp_digest_avg_latency_distribution1;
CREATE TEMPORARY TABLE tmp_digest_95th_percentile_by_avg_us (
avg_us decimal(21,0) NOT NULL,
percentile decimal(46,4) NOT NULL,
PRIMARY KEY (avg_us)
) ENGINE=InnoDB;
ANALYZE TABLE tmp_digests;
ANALYZE TABLE tmp_digest_avg_latency_distribution1;
ANALYZE TABLE tmp_digest_avg_latency_distribution2;
ANALYZE TABLE tmp_digest_95th_percentile_by_avg_us;
let $query =
INSERT INTO tmp_digest_95th_percentile_by_avg_us
SELECT s2.avg_us avg_us,
IFNULL(SUM(s1.cnt)/
NULLIF((SELECT COUNT(*) FROM tmp_digests), 0), 0) percentile
FROM tmp_digest_avg_latency_distribution1 AS s1
JOIN tmp_digest_avg_latency_distribution2 AS s2
ON s1.avg_us <= s2.avg_us
GROUP BY s2.avg_us
HAVING percentile > 0.95
ORDER BY percentile
LIMIT 1;
eval PREPARE p from '$query';
--disable_warnings
EXECUTE p;
--enable_warnings
--replace_regex /^[.0-9]*$/xxxxx/
SELECT * from tmp_digest_95th_percentile_by_avg_us;
--replace_column 10 xxx
eval EXPLAIN $query;
DROP PREPARE p;
DROP TEMPORARY TABLE tmp_digest_95th_percentile_by_avg_us;
DROP TEMPORARY TABLE tmp_digest_avg_latency_distribution2;
DROP TEMPORARY TABLE tmp_digest_avg_latency_distribution1;
DROP TEMPORARY TABLE tmp_digests;
--echo Bug 4
--echo
--echo Nested query with transformable scalar subquery at both levels:
--echo interference with semijoin: 1) derived table name not unique
--echo after flattening, 2) flattening needs to happen after
--echo transforming scalar subqueries to derived tables (on the top
--echo level here we got problems).
CREATE TABLE t1 (col_int_key int, KEY col_int_key (col_int_key));
INSERT INTO t1 VALUES (0),(8),(1),(8);
CREATE TABLE where_subselect_20070
SELECT table2 .col_int_key AS field1,
( SELECT COUNT( col_int_key )
FROM t1
)
FROM t1 AS table1
JOIN t1 AS table2
ON table2.col_int_key = table1.col_int_key;
ANALYZE TABLE t1, where_subselect_20070;
let $query =
SELECT *
FROM where_subselect_20070
WHERE (field1, ( SELECT COUNT( col_int_key ) FROM t1 )) IN (
SELECT table2 .col_int_key AS field1,
( SELECT COUNT( col_int_key )
FROM t1
)
FROM t1 AS table1
JOIN t1 AS table2
ON table2.col_int_key = table1.col_int_key
);
--sorted_result
eval $query;
eval EXPLAIN $query;
DROP TABLE t1, where_subselect_20070;
--echo Bug 5
--echo
--echo We used to not get the error: the GROUP BY transformation into a
--echo derived table didn't see outer reference "outr.a"
CREATE TABLE t1 (a INT, b INT);
INSERT INTO t1 VALUES (1,1), (1,2), (1,3);
ANALYZE TABLE t1;
--error ER_MIX_OF_GROUP_FUNC_AND_FIELDS
SELECT COUNT(*), (SELECT count(*) FROM t1 inr WHERE inr.a = outr.a)
FROM t1 outr;
DROP TABLE t1;
--echo Bug, cf requirement FR#4 addendum: If a prepared statement was
--echo prepared with the transformation enabled, it will also be
--echo executed with the transformation.
CREATE TABLE t1(a DATETIME NOT NULL);
INSERT INTO t1 VALUES ('20060606155555');
PREPARE s FROM
'SELECT a FROM t1 WHERE a=(SELECT MAX(a) FROM t1) AND (a="20060606155555")';
SET optimizer_switch='subquery_to_derived=off';
EXECUTE s;
--echo Try the other way too. Transform will not happen on EXECUTE
--echo as it can be performed only on PREPARE.
PREPARE s FROM
'SELECT a FROM t1 WHERE a=(SELECT MAX(a) FROM t1) AND (a="20060606155555")';
SET optimizer_switch='subquery_to_derived=on';
EXECUTE s;
DROP TABLE t1;
--echo #
--echo # Bug fix: we transformed a query which cannot be transformed
--echo #
CREATE TABLE t1(a INT);
INSERT INTO t1 VALUES (1),(2),(3),(4);
ANALYZE TABLE t1;
let $query1 =
SELECT (SELECT MIN(a) FROM t1) a, MAX(a) AS mx
FROM t1
WHERE FALSE
HAVING (SELECT MIN(a) FROM t1) > 0;
let $query2 =
SELECT MAX(a) AS mx
FROM t1
WHERE FALSE
HAVING (SELECT MIN(a) FROM t1) > 0;
SET optimizer_switch='subquery_to_derived=off';
eval $query1;
eval $query2;
SET optimizer_switch='subquery_to_derived=on';
eval $query1;
eval EXPLAIN $query1;
eval $query2;
eval EXPLAIN $query2;
DROP TABLE t1;
--echo #
--echo # Bug#30616646 WL#12885: SIG 6 IN JOIN::MAKE_JOIN_PLAN() AT SQL/SQL_OPTIMIZER.CC
--echo #
CREATE TABLE tab1(pk int PRIMARY KEY);
let $query =
SELECT *
FROM tab1 AS table1
LEFT JOIN
( tab1 AS table2 JOIN
tab1 AS table3
ON 1 <= (SELECT COUNT(pk) FROM tab1) )
ON 1
WHERE (SELECT MIN(pk) FROM tab1);
eval $query;
eval EXPLAIN $query;
DROP TABLE tab1;
--echo #
--echo # Bug#30617216 WL#12885 SIG6 IN JOIN::ADD_HAVING_AS_TMP_TABLE_COND() AT SQL/SQL_SELECT.CC
--echo #
--echo # ANY/ALL/SOME transformation makes us skip subquery to derived
--echo # transformation
--echo #
CREATE TABLE c2 (col_varchar_key VARCHAR(1));
let $query =
SELECT alias1.col_varchar_key
FROM c2 AS alias1
HAVING alias1.col_varchar_key > SOME (SELECT col_varchar_key FROM c2)
ORDER BY alias1.col_varchar_key;
eval $query;
eval EXPLAIN $query;
DROP TABLE c2;
--echo #
--echo # Bug#30622834 WL#12885: ASSERTION `SELECT_LEX->IS_RECURSIVE()' FAILED
--echo # Update: these are no longer transformed after Bug#31566339
CREATE TABLE t1(col_int INT);
let $query =
SELECT *
FROM ((t1 AS a2
LEFT JOIN
t1 AS a1
ON 1 <= SOME (SELECT COUNT(*) FROM t1))
LEFT JOIN
t1
ON true);
eval $query;
eval EXPLAIN $query;
let $query =
SELECT *
FROM ((t1 AS a2
LEFT JOIN
t1 AS a1
ON 1 <= ALL (SELECT COUNT(*) FROM t1))
LEFT JOIN
t1
ON true);
eval $query;
eval EXPLAIN $query;
let $query =
SELECT *
FROM (t1
RIGHT JOIN
(t1 AS a1
RIGHT JOIN
t1 AS a2
ON 1 <= SOME (SELECT COUNT(*) FROM t1))
ON true);
eval $query;
eval EXPLAIN $query;
DROP TABLE t1;
--echo #
--echo # Bug#30626975 WL#12885: WL#12885: SIG 6 IN SELECT_LEX::SYNTHESIZE_DERIVED() AT SQL/SQL_RESOLVER.CC
--echo # Update: ANY/ALL/SOME rejected.
CREATE TABLE t1(pk int PRIMARY KEY);
--echo Simplified repro, requires -ps-protocol to fail before fix
let $query=
SELECT t1.pk
FROM t1 LEFT JOIN ( SELECT t1.pk AS pk
FROM t1
WHERE (1 <= (SELECT MAX(t1.pk)
FROM t1)) ) alias2
ON true;
eval $query;
eval EXPLAIN $query;
--echo Another mode of the bug: exercises has_scalar_to_derived_transform
--echo which also needs to look inside join nest
eval PREPARE p FROM "$query";
EXECUTE p;
SET optimizer_switch='subquery_to_derived=off';
EXECUTE p;
SET optimizer_switch='subquery_to_derived=on';
EXECUTE p;
--echo original repro, requires -ps-protocol to fail before fix)
let $query=
SELECT alias1.pk
FROM t1 AS alias1 LEFT JOIN
t1 AS alias2 LEFT JOIN
(SELECT *
FROM t1
WHERE 1 <= ANY (SELECT c_sq1_alias1.pk
FROM t1 AS c_sq1_alias1 JOIN t1 AS c_sq1_alias2
ON TRUE
)
) AS alias3
ON TRUE
ON TRUE;
eval $query;
eval EXPLAIN $query;
DROP TABLE t1;
--echo #
--echo # Bug#30627570 WL#12885 SIG11 IN ITEM_SUBSELECT::PLACE() AT SQL/ITEM_SUBSELECT.H
--echo # Solved by fix for Bug#30626975. Included here for completeness.
--echo #
CREATE TABLE X (col_varchar_key VARCHAR(1));
SET OPTIMIZER_SWITCH='subquery_to_derived=on';
PREPARE prep_stmt FROM
'SELECT col_varchar_key
FROM (SELECT * FROM X
WHERE X.col_varchar_key > (SELECT MIN(col_varchar_key)
FROM X)) AS table1';
EXECUTE prep_stmt;
DROP TABLE X;
--echo #
--echo # Bug#30632595 WL#12885 SIG11 IN SELECT_LEX::NEST_DERIVED() AT SQL/SQL_RESOLVER.CC
--echo #
CREATE TABLE n(col_int INT);
INSERT INTO n VALUES (1), (2), (3);
ANALYZE TABLE n;
let $query=
SELECT alias2.col_int
FROM (SELECT * FROM n) AS alias1
JOIN
(SELECT * FROM n) AS alias2
JOIN n
ON alias2.col_int < (SELECT MAX(col_int) FROM n)
ON TRUE;
--sorted_result
eval $query;
eval EXPLAIN $query;
DROP TABLE n;
--echo #
--echo # Bug#30644900 WL#12885 SIG 11 IN SELECT_LEX::TRANSFORM_SCALAR_SUBQUERIES_TO_DERIVED()
--echo #
CREATE TABLE x(col_int_key INT);
--echo # Don't transform this due to user variable (normally this would be ok,
--echo # but here we get RAND_TABLE_BIT due to user variable here due because
--echo # engine->uncacheable() sets UNCACHEABLE_RAND for user variable read, and
--echo # not just assigment. And engine->uncacheable() propagates into
--echo # used_tables as RAND_TABLE_BIT.
let $query=
SELECT table1.col_int_key AS field1
FROM ((SELECT * FROM x
WHERE col_int_key <= (SELECT SUM(col_int_key)
FROM x
WHERE col_int_key < @var1)) AS table1
JOIN
x AS table2);
eval $query;
eval EXPLAIN $query;
--echo # Transform if no user variable
let $query=
SELECT table1.col_int_key AS field1
FROM ((SELECT * FROM x
WHERE col_int_key <= (SELECT SUM(col_int_key)
FROM x
WHERE col_int_key < 1)) AS table1
JOIN
x AS table2);
eval $query;
eval EXPLAIN $query;
DROP TABLE x;
--echo #
--echo # Bug#30645426 WL#12885: SIG11 AT TABLE_LIST::CREATE_MATERIALIZED_TABLE() AT SQL/TABLE.H
--echo # Used to fails with -ps-protocol
--echo #
CREATE TABLE t1(col_varchar VARCHAR(1));
let $query=
SELECT (SELECT COUNT(*)
FROM t1
WHERE 1 <> table1.col_varchar)
FROM ((SELECT a2.*
FROM (t1 AS a1
JOIN
t1 AS a2
ON (1 <> ( SELECT COUNT(*)
FROM t1)))) AS table1
JOIN
t1
ON 1);
eval $query;
eval EXPLAIN $query;
DROP TABLE t1;
--echo #
--echo # Bug#30650326 WL#12885 SIG 11 IN ADD_KEY_FIELDS() AT SQL/SQL_OPTIMIZER.CC
--echo #
CREATE TABLE a(i INT);
CREATE TABLE b(i INT);
CREATE TABLE c(i INT);
let $query =
SELECT *
FROM b
WHERE EXISTS (SELECT *
FROM (b
JOIN
(a AS sq1_alias2
JOIN
c
ON (sq1_alias2.i >= (SELECT MAX(i)
FROM b)))
ON (6 IN (SELECT i
FROM b))));
eval $query;
eval EXPLAIN $query;
DROP TABLE a, b, c;
--echo #
--echo # Bug#30727021 WL#12885 SIG 6 IN SELECT_LEX::SYNTHESIZE_DERIVED() AT SQL/SQL_RESOLVER.CC
--echo # Update: ANY/ALL/SOME rejected.
CREATE TABLE n(i INT);
let $query =
SELECT (SELECT AVG(n.i)
FROM n) AS feild1,
SUM(table1.i)
FROM (n AS table1
JOIN
n AS table2
ON (table1.i <= ANY (SELECT i FROM n)))
WHERE (EXISTS ((SELECT i FROM n)));
eval $query;
eval EXPLAIN $query;
--echo These (manually transformed the ANY) trigger the error as
--echo well. Semi-join complication.
let $query =
SELECT (SELECT AVG(n.i)
FROM n) AS feild1,
SUM(table1.i)
FROM (n AS table1
JOIN
n AS table2
ON (table1.i <= (select MAX(`n`.`i`) from `n`)))
WHERE (EXISTS ((SELECT i FROM n)));
eval $query;
eval EXPLAIN $query;
let $query =
SELECT (SELECT AVG(n.i)
FROM n) AS feild1,
SUM(table1.i)
FROM (n AS table1
JOIN
n AS table2
ON (table2.i <= (select MAX(`n`.`i`) from `n`)))
JOIN
n AS table3
ON (table1.i <= (select MAX(`n`.`i`) from `n`))
WHERE (EXISTS ((SELECT i FROM n)) AND
EXISTS ((SELECT i FROM n WHERE i = 5)) AND
EXISTS ((SELECT i FROM n WHERE i = 7)));
eval $query;
eval EXPLAIN $query;
--echo Follow-up fix.
--echo Anti-join complication.
let $query =
SELECT (SELECT AVG(n.i)
FROM n) AS feild1,
SUM(table1.i)
FROM (n AS table1
JOIN
n AS table2
ON (table2.i <= (select MAX(`n`.`i`) from `n`)))
JOIN n AS table3
ON (table1.i <= (select MAX(`n`.`i`) from `n`))
WHERE (NOT EXISTS ((SELECT n1.i
FROM n n1, n n2
WHERE n1.i > n2.i)));
eval $query;
eval EXPLAIN $query;
let $query =
SELECT (SELECT AVG(n.i)
FROM n) AS feild1,
SUM(table1.i)
FROM (n AS table1
JOIN
n AS table2
ON (table2.i <= (select MAX(`n`.`i`) from `n`)))
JOIN
n AS table3
ON (table1.i <= (select MAX(`n`.`i`) from `n`))
WHERE (EXISTS ((SELECT i FROM n)) AND
EXISTS ((SELECT i FROM n WHERE i = 5)) AND
EXISTS ((SELECT i FROM n WHERE i = 7)));
eval $query;
eval EXPLAIN $query;
--echo Mix of semi-join and anti-join complications.
let $query =
SELECT (SELECT AVG(n.i)
FROM n) AS feild1,
SUM(table1.i)
FROM (n AS table1
JOIN n AS table2
ON (table2.i <= (select MAX(`n`.`i`) from `n`)))
JOIN n AS table3
ON (table1.i <= (select MAX(`n`.`i`) from `n`))
WHERE (EXISTS ((SELECT i FROM n)) AND
NOT EXISTS ((SELECT i FROM n WHERE i = 4)) AND
EXISTS ((SELECT i FROM n WHERE i = 5)) AND
EXISTS ((SELECT i FROM n WHERE i = 7)) AND
NOT EXISTS ((SELECT i FROM n WHERE i = 3)));
eval $query;
eval EXPLAIN $query;
DROP TABLE n;
--echo #
--echo # Bug#30736475 WL#12885 SIG 6 IN ITEM_FIELD::FIX_FIELDS() AT SQL/ITEM.CC
--echo #
CREATE TABLE m(pk INT);
CREATE VIEW view_m AS SELECT * FROM m;
PREPARE prep_stmt FROM
'SELECT (SELECT t2.pk FROM (m AS t1
JOIN
(m AS t2
JOIN m AS t3))),
(SELECT SUM(pk) FROM m),
MIN(table1.pk)
FROM (m AS table1 JOIN
((view_m AS table2
JOIN
m AS table3))
ON (table3.pk = table2.pk))';
EXECUTE prep_stmt;
DROP VIEW view_m;
DROP TABLE m;
--echo #
--echo # Bug#30757306 WL#12885: ASSERTION `FILE' FAILED AT TABLE::SET_KEYREAD
--echo # Issue with INSERT, tweaks the from list which is transformed by us.
CREATE TABLE t1(field1 INT, field2 VARCHAR(1));
SET optimizer_switch='subquery_to_derived=on';
CREATE TABLE cc1(pk INT NOT NULL,
col_varchar_key VARCHAR(1) DEFAULT NULL,
PRIMARY KEY (pk));
let $query =
SELECT COUNT(table1.pk),
(SELECT MIN(col_varchar_key) FROM cc1 )
FROM (cc1 AS table1
JOIN (cc1 JOIN
cc1 AS table3
ON true)
ON true)
WHERE (1 <> (SELECT COUNT(*) FROM cc1));
eval $query;
eval EXPLAIN $query;
eval INSERT INTO t1 $query;
eval EXPLAIN INSERT INTO t1 $query;
SELECT * from t1;
--echo Test this also for coverage
eval CREATE TABLE t2 AS $query;
DROP TABLE t1, cc1, t2;
--echo #
--echo # Bug#30755759 WL#12885 SIG6 IN HASH_JOIN_BUFFER::STOREFROMTABLEBUFFERS()
--echo # Issue with covering indexes.
--echo #
CREATE TABLE a (
pk INTEGER
);
CREATE TABLE bb (
col_varchar VARCHAR(1)
);
CREATE TABLE cc (
pk INTEGER,
col_int INTEGER,
col_int_key INTEGER,
col_time TIME,
col_time_key TIME,
col_datetime DATETIME,
col_datetime_key DATETIME,
col_varchar VARCHAR(1),
col_varchar_key VARCHAR(1),
PRIMARY KEY (pk)
);
CREATE INDEX idx_cc_col_varchar_key ON cc(col_varchar_key);
INSERT INTO cc VALUES (1,764578610,1400450503,'04:58:13','15:43:36',
'1977-07-20 14:44:30','1998-10-04 17:29:04','0','N');
INSERT INTO cc VALUES (2,-1430323290,761341340,'17:39:46','10:22:47',
'2027-06-26 01:50:30','1983-11-11 03:33:36','z','a');
ANALYZE TABLE a, bb, cc;
--echo Without the patch this plan would use an index scan on cc, but this
--echo is not covering.
--skip_if_hypergraph # Depends on the query plan.
EXPLAIN FORMAT=tree
SELECT
AVG(cc.col_varchar_key),
(
SELECT SUM(cc.col_int_key)
FROM cc,a
)
FROM cc STRAIGHT_JOIN bb ON bb.col_varchar = cc.col_varchar_key
WHERE cc.col_varchar <> 'w';
DROP TABLE a, bb, cc;
--echo #
--echo # Bug#30774730 WL#12885 SIG 6 IN ITEM_FIELD::FIX_FIELDS() AT SQL/ITEM.CC
--echo #
CREATE TABLE n(i INT);
CREATE VIEW view_n AS SELECT * FROM n;
PREPARE p FROM
'SELECT (SELECT MAX(i) FROM n) AS field2,
COUNT(table1.i) AS field3 ,
(SELECT AVG(i) FROM n) AS field4
FROM (n AS table1
JOIN
( view_n AS table2
JOIN
n AS table3
ON true )
ON (table2.i = table2.i))';
EXECUTE p;
DROP VIEW view_n;
DROP TABLE n;
--echo #
--echo # Bug#30775902 WL#12885 SIG6 IN HASH_JOIN_BUFFER::STOREFROMTABLEBUFFERS()
--echo #
CREATE TABLE cc (
pk int NOT NULL AUTO_INCREMENT,
col_int int DEFAULT NULL,
col_int_key int DEFAULT NULL,
col_varchar varchar(1) DEFAULT NULL,
col_varchar_key varchar(1) DEFAULT NULL,
PRIMARY KEY (pk),
KEY idx_cc_col_int_key (col_int_key),
KEY idx_cc_col_varchar_key (col_varchar_key)
) ENGINE=InnoDB AUTO_INCREMENT=21 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci;
INSERT INTO cc VALUES
(1, 1375472775, 262188886, 'I', 'b'),
(2, -1851648474, 130471446, 'o', '7'),
(3, 503688873, 259988235, 'L', 't'),
(4, 995143874, -60832670, 'Q', 'K'),
(5, -1440599261, -1669741488, 'k', '7'),
(6, -1534014276, 1760407196, 'c', 'Z'),
(7, 808084535, 311457905, 'B', 'j'),
(8, 731883185, -571871645, 'd', 'm'),
(9, 1445888442, 1903365311, 'w', 's'),
(10, 222313615, -404576744, 'n', 'V'),
(11, -1320350569, -1496644593, 'y', 'o'),
(12, 2033205532, 1376480867, 'x', '4'),
(13, -101883317, -857422791, 'A', '7'),
(14, 867688302, 1410896813, 'J', 'c'),
(15, -1961088920, -2019664999, 'v', '1'),
(16, -1850585486, -1872043099, '1', 'o'),
(17, -603486188, 901895823, 'G', 'q'),
(18, -1381157785, -1613624643, 'Z', 'E'),
(19, -270976631, 288433409, 'r', 'Z'),
(20, 2113722977, 409698731, 'n', 'd');
ANALYZE TABLE cc;
CREATE VIEW view_cc AS SELECT * FROM cc;
let $query=
SELECT AVG(table2.col_int) AS field1 ,
( SELECT COUNT(subquery1_t1.col_varchar_key ) AS subquery1_field1
FROM ( cc AS subquery1_t1
LEFT OUTER JOIN
( cc AS subquery1_t2
INNER JOIN view_cc AS subquery1_t3
ON ( subquery1_t3.col_varchar = subquery1_t2.col_varchar_key ) )
ON ( subquery1_t3.col_int_key = subquery1_t2.col_int ) )
WHERE subquery1_t1.col_varchar_key != subquery1_t2.col_varchar ) AS field2
FROM ( cc AS table1
STRAIGHT_JOIN
cc AS table2
ON ( table1.col_varchar_key = table1.col_varchar_key ) )
WHERE ( table1.pk = 1 ) AND
( table1.col_varchar_key = 'D' OR
table1.col_varchar_key = table1.col_varchar_key) OR
table1.col_varchar_key < 'O'
ORDER BY table1.col_varchar ASC, field2, field1
LIMIT 1000 OFFSET 2;
eval $query;
--skip_if_hypergraph # Depends on the query plan.
eval EXPLAIN FORMAT=tree $query;
DROP VIEW view_cc;
DROP TABLE cc;
--echo #
--echo # Bug#30781925 WL#12885 SIG11 IN GETITERATORFORDERIVEDTABLE() AT SQL/SQL_EXECUTOR.CC
--echo #
CREATE TABLE m(col_int INT);
SELECT MIN(table1.col_int) AS field1,
( SELECT COUNT(col_int )
FROM m AS t1 ) AS field2,
AVG(table1.col_int) AS field4,
( SELECT MAX(t1.col_int)
FROM ( m AS t1 JOIN
( m AS t2
JOIN
m AS t3 ) ) ) AS field5
FROM ( m AS table1
JOIN ( ( m AS table2
JOIN
( SELECT COUNT(col_int) FROM m ) AS table3 ) ) ) ;
DROP TABLE m;
--echo #
--echo # Bug#30786714 WL#12885 SIG6 IN ITEM_FIELD::FIX_FIELDS() AT SQL/ITEM.CC
--echo #
--echo # Missing treatment of view references in transformed block by
--echo # transform_grouped_to_derived, e.g. table2.col_int below.
--echo # Used to fail with prepared statement
CREATE TABLE n(col_int INT);
INSERT INTO n VALUES (1), (2), (3);
ANALYZE TABLE n;
CREATE VIEW view_n AS SELECT * FROM n;
SET sql_mode="";
let $query =
SELECT table_b.col_int AS field_a,
(SELECT MAX(col_int) FROM n) AS field_b,
COUNT(table_a.col_int) AS field_c,
(SELECT AVG(col_int) FROM n) AS field_d
FROM ( n AS table_a
JOIN ( view_n AS table_b
JOIN n AS table_c) );
# Non deterministic query so replace
--replace_regex /3/1/
eval $query;
eval EXPLAIN $query;
DROP VIEW view_n;
CREATE VIEW view_n(col_int2) AS SELECT col_int + 1 FROM n;
--echo More complex view featuring an expression and now also
--echo two equivalent view references
let $query =
SELECT table_b.col_int2 AS field_e,
table_a.col_int,
(SELECT MAX(col_int) FROM n) AS field_a,
COUNT(table_a.col_int ) AS field_b,
(SELECT AVG(col_int) FROM n) AS field_c,
table_b.col_int2 AS field_d
FROM ( n AS table_a
JOIN (view_n AS table_b
JOIN n AS table_c) );
--replace_regex /4/2/
eval $query;
eval EXPLAIN $query;
SET sql_mode=default;
DROP VIEW view_n;
DROP TABLE n;
--echo #
--echo # Bug#30786266 WL#12885 SIG 6 IN QEP_TAB::PUSH_INDEX_COND() AT SQL/SQL_SELECT.CC
--echo #
CREATE TABLE c (pk INTEGER AUTO_INCREMENT,
col_int INT ,
col_int_key INT ,
col_varchar VARCHAR(1) ,
col_varchar_key VARCHAR(1) ,
PRIMARY KEY(pk));
CREATE INDEX idx_c_col_int_key ON c(col_int_key);
CREATE TABLE cc (pk INTEGER AUTO_INCREMENT,
col_int INT ,
col_int_key INT ,
col_varchar VARCHAR(1) ,
col_varchar_key VARCHAR(1) ,
PRIMARY KEY(pk));
INSERT INTO cc VALUES (DEFAULT,1750627978,-2052557260,'0','o');
INSERT INTO c values
(DEFAULT,809266110,-169779076,'C','O'),
(DEFAULT,3049998,1973362945,'2','O'),
(DEFAULT,912437770,-1109570817,'W','G'),
(DEFAULT,-1655291083,-1761323512,'q','9'),
(DEFAULT,-1276272795,-591291338,'3','O'),
(DEFAULT,-1297781203,-970713309,'q','r'),
(DEFAULT,-261602165,-2083959767,'7','O'),
(DEFAULT,357530836,-746109993,'6','i'),
(DEFAULT,1553746652,-1607882572,'G','Y'),
(DEFAULT,-1620551574,381511992,'5','n'),
(DEFAULT,-1221888549,-1127778040,'l','U'),
(DEFAULT,1048455957,-1830777487,'U','T'),
(DEFAULT,-541641553,-1731661529,'A','Q'),
(DEFAULT,1482963294,-1570976962,'0','s');
ANALYZE TABLES c, cc;
EXPLAIN
SELECT MIN( table2.col_int ) AS field1 ,
SUM( table2.col_int ) AS field2 ,
( SELECT MAX( subquery1_t1.pk ) AS subquery1_field1
FROM ( cc AS subquery1_t1
INNER JOIN
cc AS subquery1_t2
ON ( subquery1_t2.col_varchar_key =
subquery1_t1.col_varchar_key ) ) ) AS field3
FROM ( c AS table1
RIGHT JOIN
( ( cc AS table2
STRAIGHT_JOIN
c AS table3
ON ( table2.pk = table2.col_int ) ) )
ON ( table2.col_varchar_key = table2.col_varchar AND
table1.col_int_key > ( SELECT 9 FROM cc ) ) )
WHERE ( EXISTS ( SELECT subquery3_t1.col_int AS subquery3_field1
FROM c AS subquery3_t1
WHERE subquery3_t1.col_int_key = table1.pk ) ) AND
table1.col_varchar_key <> table2.col_varchar;
DROP TABLE c, cc;
--echo #
--echo # Bug#30818896 WL#12885: ASSERTION FAILURE IN TEMPTABLE::COLUMN::READ_STD_USER_DATA()
--echo # Refinement of view references in transformed block by
--echo # transform_grouped_to_derived. Cf. Bug#30786714. We replaced too many.
CREATE TABLE b (
pk int NOT NULL AUTO_INCREMENT,
col_int int DEFAULT NULL,
col_int_key int DEFAULT NULL,
col_varchar varchar(1) DEFAULT NULL,
col_varchar_key varchar(1) DEFAULT NULL,
PRIMARY KEY (pk),
KEY idx_b_col_int_key (col_int_key),
KEY idx_b_col_varchar_key (col_varchar_key)
) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci;
INSERT INTO b VALUES (1,-1155099828,-1879439976,'N','a');
CREATE TABLE c (
pk int NOT NULL AUTO_INCREMENT,
col_int int DEFAULT NULL,
col_int_key int DEFAULT NULL,
col_varchar varchar(1) DEFAULT NULL,
col_varchar_key varchar(1) DEFAULT NULL,
PRIMARY KEY (pk),
KEY idx_c_col_int_key (col_int_key),
KEY idx_c_col_varchar_key (col_varchar_key)
) ENGINE=InnoDB AUTO_INCREMENT=21 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci;
INSERT INTO c VALUES
(1, -3666739, 177583826, 'm', 'j'),
(2, 1904347123, 1743248268, '2', 'P'),
(3, -469827848, 1376980829, 'i', 'A'),
(4, 1433595053, 1819090851, 'L', 'M'),
(5, 726547892, 1068584791, 'T', 'j'),
(6, 1439902652, -1277159531, 'S', 'r'),
(7, -1897073668, -282803609, 'x', '7'),
(8, 1220936946, 170773463, '8', 'z'),
(9, 2127527772, 1049703732, 'i', 'y'),
(10, 673031799, 609105572, 'h', 'a'),
(11, -479585417, 1317141227, 'w', 'k'),
(12, -688521145, -684371590, 'S', 'y'),
(13, 2841986, -721059140, 'E', 'I'),
(14, 58615730, 496153244, '2', 'U'),
(15, 1139572680, 1532132699, '2', 'n'),
(16, -842003748, 1189460625, 'I', 'P'),
(17, -1177191130, -1717792127, 'y', 'n'),
(18, -1108396995, 313282977, 'N', 'a'),
(19, -361562994, 419341930, 'd', 'C'),
(20, 743792160, 984757597, 'e', '2');
CREATE TABLE cc (
pk int NOT NULL AUTO_INCREMENT,
col_int int DEFAULT NULL,
col_int_key int DEFAULT NULL,
col_varchar varchar(1) DEFAULT NULL,
col_varchar_key varchar(1) DEFAULT NULL,
PRIMARY KEY (pk),
KEY idx_cc_col_int_key (col_int_key),
KEY idx_cc_col_varchar_key (col_varchar_key)
) ENGINE=InnoDB AUTO_INCREMENT=21 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci;
INSERT INTO cc VALUES
(1, 1375472775, 262188886, 'I', 'b'),
(2, -1851648474, 130471446, 'o', '7'),
(3, 503688873, 259988235, 'L', 't'),
(4, 995143874, -60832670, 'Q', 'K'),
(5, -1440599261, -1669741488, 'k', '7'),
(6, -1534014276, 1760407196, 'c', 'Z'),
(7, 808084535, 311457905, 'B', 'j'),
(8, 731883185, -571871645, 'd', 'm'),
(9, 1445888442, 1903365311, 'w', 's'),
(10, 222313615, -404576744, 'n', 'V'),
(11,-1320350569, -1496644593, 'y', 'o'),
(12, 2033205532, 1376480867, 'x', '4'),
(13, -101883317, -857422791, 'A', '7'),
(14, 867688302, 1410896813, 'J', 'c'),
(15,-1961088920, -2019664999, 'v', '1'),
(16,-1850585486, -1872043099, '1', 'o'),
(17, -603486188, 901895823, 'G', 'q'),
(18,-1381157785, -1613624643, 'Z', 'E'),
(19, -270976631, 288433409, 'r', 'Z'),
(20, 2113722977, 409698731, 'n', 'd');
CREATE VIEW view_cc AS
SELECT cc.col_int_key AS col_int_key,
cc.col_varchar AS col_varchar,
cc.col_varchar_key AS col_varchar_key from cc;
ANALYZE TABLES b, c, cc;
SET sql_mode='';
let $query =
SELECT STRAIGHT_JOIN
( SELECT AVG(subquery1_t1.col_int) AS subquery1_field1
FROM c AS subquery1_t1
WHERE EXISTS ( SELECT subquery1_t1.pk AS child_subquery1_field1
FROM ( view_cc AS child_subquery1_t1
LEFT JOIN
b AS child_subquery1_t2
ON child_subquery1_t2.pk = child_subquery1_t1.col_int_key )
WHERE child_subquery1_t1.col_varchar_key > subquery1_t1.col_varchar OR
child_subquery1_t1.col_varchar_key < child_subquery1_t1.col_varchar))
AS field1,
table1.col_int_key AS field2,
SUM(table1.col_varchar_key) AS field3,
MAX(table2.col_int) AS field4
FROM ( cc AS table1
INNER JOIN
( b AS table2
INNER JOIN
cc AS table3
ON table3.col_int = table2.col_int_key )
ON ( table3.col_varchar_key = table2.col_varchar_key ) )
WHERE ( NOT EXISTS ( ( SELECT subquery2_t1.col_varchar AS subquery2_field1
FROM c AS subquery2_t1 ) ) ) AND
table1.col_varchar_key = table2.col_varchar_key AND
( table2.col_varchar_key >= 'v' AND
table1.col_varchar <= table2.col_varchar_key )
ORDER BY field2 DESC, table1.col_int_key, table2 .pk ASC, field1, field2, field3, field4
LIMIT 1;
eval $query;
eval EXPLAIN $query;
DROP VIEW view_cc;
DROP TABLES b, c, cc;
SET sql_mode=default;
--echo
--echo Bug found while running RAPID mtr (rapid.view, rapid.subselect) with
--echo PS-protocol
--echo
CREATE TABLE t1(a INTEGER, b INTEGER);
CREATE TABLE t2(a INTEGER);
INSERT INTO t1 VALUES
(1, 10),
(2, 20), (2, 21),
(3, NULL),
(4, 40), (4, 41), (4, 42), (4, 43), (4, 44);
INSERT INTO t2 VALUES (1), (2), (3), (4), (5), (NULL);
ANALYZE TABLE t1,t2;
CREATE VIEW v1 AS SELECT a, b, (SELECT COUNT(*) FROM t2) AS c FROM t1;
let $query =
SELECT * FROM v1;
eval $query;
eval EXPLAIN $query;
--echo The select does not reference the scalar subquery
let $query =
SELECT a FROM v1;
eval $query;
eval EXPLAIN $query;
set sql_mode='';
let $query =
SELECT a,c FROM v1 GROUP BY b HAVING c > 0;
--sorted_result
eval $query;
eval EXPLAIN $query;
set sql_mode=default;
--echo The select references the scalar subquery from the view, but not in select list
let $query =
SELECT a FROM v1 WHERE c > 0;
eval $query;
eval EXPLAIN $query;
DROP VIEW v1;
DROP TABLE t1, t2;
--echo #
--echo # Bug#30922236 WL#13851 SIG 11 IN OPTIMIZE_KEYUSE() AT SQL/SQL_OPTIMIZER.CC
--echo # Incomplete fix for commit 941056f2c "WL#12885: view bug 2"
CREATE TABLE c (
pk int NOT NULL AUTO_INCREMENT,
col_int int DEFAULT NULL,
col_int_key int DEFAULT NULL,
col_date date DEFAULT NULL,
col_date_key date DEFAULT NULL,
col_time time DEFAULT NULL,
col_time_key time DEFAULT NULL,
col_datetime datetime DEFAULT NULL,
col_datetime_key datetime DEFAULT NULL,
col_varchar varchar(1) DEFAULT NULL,
col_varchar_key varchar(1) DEFAULT NULL,
PRIMARY KEY (pk),
KEY idx_cc_col_int_key (col_int_key),
KEY idx_cc_col_date_key (col_date_key),
KEY idx_cc_col_time_key (col_time_key),
KEY idx_cc_col_datetime_key (col_datetime_key),
KEY idx_cc_col_varchar_key (col_varchar_key)
) ENGINE=InnoDB AUTO_INCREMENT=21 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci;
CREATE VIEW view_c AS
SELECT alias1.col_int
FROM ( c AS alias1
JOIN
( ( c AS alias2
JOIN
c AS alias3
ON(1)) )
ON ( alias2.col_int >= ( SELECT MIN( sq1_alias1.col_int ) AS sq1_field1
FROM ( c AS sq1_alias1, c AS sq1_alias2 ) ) ) )
WHERE ( EXISTS ( ( SELECT sq2_alias1.col_int
FROM ( c AS sq2_alias1
JOIN
c AS sq2_alias2
ON ( sq2_alias2.col_int = sq2_alias1.pk ) )) ) ) ;
let $query =
SELECT * FROM view_c;
eval $query;
eval EXPLAIN $query;
DROP VIEW view_c;
DROP TABLE c;
--echo #
--echo # Bug#31535523 WL#13686: SIG6 HEADER::NUMBER_OF_USED_CHUNKS() == 0 AT TEMPTABLE/BLOCK.H
--echo # This query used to fail during server shutdown, cf. bug issue for how to run.
--echo # In a single mtr run, look in var/log/mysqld.1.err for the stack trace before the fix.
CREATE TABLE t1 (i int);
CREATE TABLE t2 (i int);
SELECT t2.i FROM t2
WHERE ( false ) AND
( t2.i IN ( SELECT t1.i FROM t1
WHERE t1.i <= SOME ( SELECT 8 UNION SELECT 3 ) ) );
DROP TABLE t1, t2;
--echo #
--echo # WL#13686 Transformation of constant scalar subquery with DUAL causes
--echo # assert.
--echo #
CREATE TABLE t1 (a int);
INSERT INTO t1 VALUES (1), (2);
ANALYZE TABLE t1;
let $query =
SELECT a FROM t1 WHERE (SELECT 1 FROM DUAL WHERE 1=0) IS NULL;
--sorted_result
eval $query;
eval EXPLAIN $query;
DROP TABLE t1;
--echo #
--echo # Bug#31462120 ASSERTION `NESTED_JOIN_LIST->SIZE() == 2' FAILED AT SQL/SQL_RESOLVER.CC
--echo #
CREATE TABLE a (col_varchar_key varchar(1));
let $query=
SELECT table1.col_varchar_key
FROM ( SELECT sub1_t2.*
FROM (a
JOIN
(a AS sub1_t2)
ON sub1_t2.col_varchar_key IN (SELECT col_varchar_key FROM a))
WHERE EXISTS (SELECT sub2_t1.col_varchar_key
FROM a AS sub2_t1)) AS table1
JOIN
(a AS table2
JOIN
a
ON 1 >= (SELECT MIN( col_varchar_key) FROM a))
ON true;
eval $query;
eval EXPLAIN $query;
DROP TABLE a;
--echo #
--echo # Bug#31566339 WRONG RESULT WITH OPTIMIZER_SWITCH SUBQUERY_TO_DERIVED ON: ANY
--echo #
CREATE TABLE t1(pk int primary key);
INSERT INTO t1 VALUES(1),(2),(3),(4),(5);
ANALYZE TABLE t1;
--echo # Used to return NULL
SELECT SUM(pk) FROM t1 WHERE ( pk >= ANY ( SELECT MAX(1) FROM DUAL) );
DROP TABLE t1;
--echo #
--echo # Bug #32859025: MYSQLD CRASH - ASSERTION `N < M_SIZE' FAILED|SQL/SQL_ARRAY.H
--echo #
CREATE TABLE t1 ( pk INTEGER );
# The old optimizer calls both queries COUNT(*); the hypergraph optimizer
# gets the names f1 and f2 right. We only really care that it doesn't crash,
# so accept both.
SELECT
(SELECT COUNT(*) FROM t1) AS f1,
(SELECT COUNT(*) FROM t1) AS f2
FROM t1
GROUP BY f1, f2 WITH ROLLUP;
DROP TABLE t1;
--echo #
--echo # Bug#33057397: FIELD NAMES ARE DISPLAYED INCORRECTLY WITH ROLLUP AND
--echo # SUBQUERY_TO_DERIVED
CREATE TABLE t1 ( f1 INTEGER);
INSERT INTO t1 VALUES (0);
# Name of the expression should be displayed as "field1".
# Used to be "min".
SELECT (SELECT MIN(f1) AS min FROM t1 ) AS field1 FROM t1 GROUP BY
field1 WITH ROLLUP;
DROP TABLE t1;
--echo #
--echo # Bug#33104036: ASSERTION FAILURE IN FIND_SUBQUERY_IN_SELECT_LIST AT
--echo # ../SQL/ITEM_SUBSELECT.CC
CREATE TABLE t1 (f1 INTEGER);
# Should not crash
SELECT (SELECT SUM(f1) AS SQ1_field1 FROM t1) as field1
FROM t1 GROUP BY f1 WITH ROLLUP ORDER BY f1;
DROP TABLE t1;
--echo Original repro case
CREATE TABLE t1 (pk integer auto_increment,
col_int int ,
col_datetime datetime ,
col_char_255 char(255) ,
col_smallint smallint ,
col_decimal_10_8 decimal(10,8),
primary key(pk)) ;
set sql_mode='';
let $query =
SELECT alias1.col_decimal_10_8 AS field1 ,
( SELECT SUM(table1.col_smallint ) AS SQ1_field1
FROM ( t1 as table1 RIGHT JOIN t1 as table2 ON 1 )
) AS field2 ,
GROUPING( LOG(alias1.col_int) ) AS field3
FROM ( t1 AS alias1
JOIN
t1 AS alias2 ON 1 )
WHERE alias2.pk IN ( SELECT col_char_255 FROM t1 )
GROUP BY field1, field2, LOG(alias1.col_int)
WITH ROLLUP
ORDER BY alias1.col_datetime, field1, field2, LOG(alias1.col_int) ;
eval $query;
eval EXPLAIN $query;
set sql_mode=default;
DROP TABLE t1;
--echo #
--echo # Bug#33079592: ASSERTION `SELECT->BASE_REF_ITEMS[ITEM_IDX] == ITEM' FAILED
--echo #
CREATE TABLE t1 (f1 INTEGER);
let $query1=
SELECT SUM(f1), ROW_NUMBER() OVER (PARTITION BY f1), (SELECT MIN(f1) FROM t1) FROM t1;
let $query2=
SELECT SUM(f1), ROW_NUMBER() OVER (), (SELECT MIN(f1) FROM t1) FROM t1 ORDER BY f1;
let $query3=
SELECT SUM(f1), SUM(f1) OVER (), f1, (SELECT MIN(f1) FROM t1) sq FROM t1 ORDER BY f1;
SET optimizer_switch='subquery_to_derived=default';
# This will throw error
--error ER_MIX_OF_GROUP_FUNC_AND_FIELDS
eval $query1;
# This should throw error. But does not because before the full group by verification
# happens, order by elements are removed (not correct for this case).
eval $query2;
--error ER_MIX_OF_GROUP_FUNC_AND_FIELDS
eval $query3;
SET optimizer_switch='subquery_to_derived=on';
# This will throw error (not as precise as when the transformation is off)
--error ER_MIX_OF_GROUP_FUNC_AND_FIELDS
eval $query1;
# This should throw error. But does not because before the full group by verification
# happens, order by elements are removed (not correct for this case).
eval $query2;
--error ER_MIX_OF_GROUP_FUNC_AND_FIELDS
eval $query3;
DROP TABLE t1;
--echo #
--echo # Bug#33910786 Scalar subquery transformation combined with
--echo # WHERE clause optimization lead to reject_multiple_rows being
--echo # ineffective
--echo #
CREATE TABLE t(i INT);
INSERT INTO t VALUES (1);
ANALYZE TABLE t;
let $query = SELECT 1 AS one FROM t WHERE 1=(SELECT 1 UNION SELECT 2);
--error ER_SUBQUERY_NO_1_ROW
eval $query;
--skip_if_hypergraph # Depends on the query plan.
eval EXPLAIN FORMAT=tree $query;
DROP TABLE t;
--echo #
--echo # Bug#34998721 Mysqld crash - Assertion `table_num_to_node_num[table_num] != -1' failed.
--echo # Only seen with hypergraph optimizer enabled.
--echo #
CREATE TABLE t(x INT);
SET SQL_MODE='';
SELECT COUNT(*), (SELECT 1 FROM t)
FROM t AS t1,
(SELECT 1 FROM t) AS t2,
t AS t3
ORDER BY ROW_NUMBER() OVER (ORDER BY -t3.x);
SET SQL_MODE=default;
DROP TABLE t;
--echo #
--echo # Bug#35150085 Wrong item name in result set after transform
--echo #
SET SQL_MODE='';
CREATE TABLE t(i INT);
INSERT INTO t VALUES (4);
SELECT i AS i1, # used to get renamed to i2
i AS i2,
(SELECT i FROM t) AS subquery,
SUM(i) AS summ
FROM t;
SET SQL_MODE=default;
DROP TABLE t;
SET optimizer_switch='subquery_to_derived=default';
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