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Add a test case to show that ticket [e8b674241947eb3b] has been fixed.

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FossilOrigin-Name: e20de6d450c2b4d5bde737f625de16ff53262c22ce7aa6917b64f1665170d33f
This commit is contained in:
drh 2022-12-03 17:23:29 +00:00
parent e4fa4794be
commit fcf4243c36
3 changed files with 39 additions and 7 deletions
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manifest
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@ -1,5 +1,5 @@
C Further\simprovements\sto\sthe\sestimated\scost\sof\ssorting.\s\sTake\sinto\saccount\nthe\snumber\sof\scolumns\sto\sbe\ssorted.
D 2022-12-03T17:09:15.127
C Add\sa\stest\scase\sto\sshow\sthat\sticket\s[e8b674241947eb3b]\shas\sbeen\sfixed.
D 2022-12-03T17:23:29.589
F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@ -1525,7 +1525,7 @@ F test/snapshot_fault.test f6c5ef7cb93bf92fbb4e864ecc5c87df7d3a250064838822db5b4
F test/snapshot_up.test a0a29c4cf33475fcef07c3f8e64af795e24ab91b4cc68295863402a393cdd41c
F test/soak.test 18944cf21b94a7fe0df02016a6ee1e9632bc4e8d095a0cb49d95e15d5cca2d5c
F test/softheap1.test 843cd84db9891b2d01b9ab64cef3e9020f98d087
F test/sort.test c2adc635c2564241fefec0b3a68391ef6868fd3b
F test/sort.test f86751134159abb5e5fd4381a0d7038c91013638cd1e3fa1d7850901f6df6196
F test/sort2.test cc23b7c19d684657559e8a55b02f7fcee03851d0
F test/sort3.test 1480ed7c4c157682542224e05e3b75faf4a149e5
F test/sort4.test 5c34d9623a4ae5921d956dfa2b70e77ed0fc6e5c
@ -2065,8 +2065,8 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
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Z b965371360d6f8e63aa93b345d42429e
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# Remove this line to create a well-formed Fossil manifest.

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f3290cf83b7c02d17d85d8942954f052b486c370cd5ec732969da9061dc1d19a
e20de6d450c2b4d5bde737f625de16ff53262c22ce7aa6917b64f1665170d33f

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test/sort.test
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@ -595,4 +595,36 @@ do_execsql_test 17.1 {
SELECT * FROM sqlite_master ORDER BY sql;
} {}
# 2022-12-03 Ticket e8b674241947eb3b
# Improve estimates for the cost of sorting relative
# to the cost of doing an index lookup, so as to get
# a better query plan. See the ticket for a deetailed
# example.
#
reset_db
do_execsql_test 18.1 {
CREATE TABLE t1(a INTEGER PRIMARY KEY, b, c);
WITH RECURSIVE c(x) AS (VALUES(1) UNION ALL SELECT x+1 FROM c WHERE x<50)
-- increase to 5000 for actual test data ----^^
INSERT INTO t1(a,b,c) SELECT x, random()%5000, random()%5000 FROM c;
CREATE TABLE t2(d,e,f);
WITH RECURSIVE c(x) AS (VALUES(1) UNION ALL SELECT x+1 FROM c WHERE x<500)
-- increase to 50000 for actual test data -----^^^
INSERT INTO t2(d,e,f) SELECT
NULLIF(0, random()%2), random()%5000, random()%5000
FROM c;
ANALYZE;
UPDATE sqlite_stat1 SET stat='50000' WHERE tbl='t2';
UPDATE sqlite_stat1 SET stat='5000' WHERE tbl='t1';
ANALYZE sqlite_schema;
} {}
do_execsql_test 18.2 {
EXPLAIN QUERY PLAN
SELECT a FROM t1 JOIN t2
WHERE a IN (1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20)
AND a=CASE WHEN d IS NOT NULL THEN e ELSE f END
ORDER BY a;
} {/.*SCAN t2.*SEARCH t1.*/}
# ^^^^^^^--^^^^^^^^^--- t2 should be the outer loop.
finish_test