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In the query planner, do not consider index X to be a proper subset of

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index Y if X is a covering index but Y is not.

FossilOrigin-Name: ee31c04353cd75ea4bbadee2994c30d3808b696a4f680187502d104902988a5d
This commit is contained in:
drh
2017-10-15 22:16:25 +00:00
parent 835cd436e1
commit 47b1d68f25
4 changed files with 23 additions and 17 deletions
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5
test/analyze9.test
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@ -1052,8 +1052,11 @@ do_execsql_test 23.0 {
do_eqp_test 23.1 {
SELECT * FROM t4 WHERE
(e=1 AND b='xyz' AND c='zyx' AND a<'AEA') AND f<300
-- Formerly used index i41. But i41 is not a covering index whereas
-- the PRIMARY KEY is a covering index, and so as of 2017-10-15, the
-- PRIMARY KEY is preferred.
} {
0 0 0 {SEARCH TABLE t4 USING INDEX i41 (e=? AND c=? AND b=? AND a<?)}
0 0 0 {SEARCH TABLE t4 USING PRIMARY KEY (c=? AND b=? AND a<?)}
}
do_eqp_test 23.2 {
SELECT * FROM t4 WHERE