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Allow the VALUES-as-coroutine optimization to be applied to later rows of

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a VALUES clause even if earlier rows do not qualify.

FossilOrigin-Name: 9a47ea7f0f675f7bf4710901487ce34c7689e618cd1d8b9f94f0ff7ebc3f2841
This commit is contained in:
drh
2024-03-18 16:30:00 +00:00
parent b03805b70b
commit c195e2374b
4 changed files with 106 additions and 10 deletions
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91
test/values.test
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@ -489,4 +489,95 @@ do_eqp_test 15.7 {
`--SCAN 4-ROW VALUES CLAUSE
}
#--------------------------------------------------------------------------
# The VALUES-as-coroutine optimization can be applied to later rows of
# a VALUES clause even if earlier rows do not qualify.
#
reset_db
do_execsql_test 16.1 {
CREATE TABLE t1(a,b);
}
do_execsql_test 16.2 {
BEGIN;
INSERT INTO t1 VALUES(1,2),(3,4),(5,6),
(7,row_number()OVER()),
(9,10), (11,12), (13,14), (15,16);
SELECT * FROM t1 ORDER BY a, b;
ROLLBACK;
} {1 2 3 4 5 6 7 1 9 10 11 12 13 14 15 16}
do_eqp_test 16.3 {
INSERT INTO t1 VALUES(1,2),(3,4),(5,6),
(7,row_number()OVER()),
(9,10), (11,12), (13,14), (15,16);
} {
QUERY PLAN
`--COMPOUND QUERY
|--LEFT-MOST SUBQUERY
| `--SCAN 3-ROW VALUES CLAUSE
|--UNION ALL
| |--CO-ROUTINE (subquery-xxxxxx)
| | `--SCAN CONSTANT ROW
| `--SCAN (subquery-xxxxxx)
`--UNION ALL
`--SCAN 4-ROW VALUES CLAUSE
}
do_execsql_test 16.4 {
BEGIN;
INSERT INTO t1 VALUES
(1,row_number()OVER()),
(2,3), (4,5), (6,7);
SELECT * FROM t1 ORDER BY a, b;
ROLLBACK;
} {1 1 2 3 4 5 6 7}
do_eqp_test 16.5 {
INSERT INTO t1 VALUES
(1,row_number()OVER()),
(2,3), (4,5), (6,7);
} {
QUERY PLAN
`--COMPOUND QUERY
|--LEFT-MOST SUBQUERY
| |--CO-ROUTINE (subquery-xxxxxx)
| | `--SCAN CONSTANT ROW
| `--SCAN (subquery-xxxxxx)
`--UNION ALL
`--SCAN 3-ROW VALUES CLAUSE
}
do_execsql_test 16.6 {
BEGIN;
INSERT INTO t1 VALUES
(1,2),(3,4),
(5,row_number()OVER()),
(7,8),(9,10),(11,12),
(13,row_number()OVER()),
(15,16),(17,18),(19,20),(21,22);
SELECT * FROM t1 ORDER BY a, b;
ROLLBACK;
} { 1 2 3 4 5 1 7 8 9 10 11 12 13 1 15 16 17 18 19 20 21 22}
do_eqp_test 16.7 {
INSERT INTO t1 VALUES
(1,2),(3,4),
(5,row_number()OVER()),
(7,8),(9,10),(11,12),
(13,row_number()OVER()),
(15,16),(17,18),(19,20),(21,22);
} {
QUERY PLAN
`--COMPOUND QUERY
|--LEFT-MOST SUBQUERY
| `--SCAN 2-ROW VALUES CLAUSE
|--UNION ALL
| |--CO-ROUTINE (subquery-xxxxxx)
| | `--SCAN CONSTANT ROW
| `--SCAN (subquery-xxxxxx)
|--UNION ALL
| `--SCAN 3-ROW VALUES CLAUSE
|--UNION ALL
| |--CO-ROUTINE (subquery-xxxxxx)
| | `--SCAN CONSTANT ROW
| `--SCAN (subquery-xxxxxx)
`--UNION ALL
`--SCAN 4-ROW VALUES CLAUSE
}
finish_test