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Experimental change to explain query plan to identify covering indexes on expressions.

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FossilOrigin-Name: 3bb03a2891e30c58b66e3665a8877a8eab4a8bac57ee153d8d31358caeaf4b7c
This commit is contained in:
dan
2024-10-11 20:36:26 +00:00
parent 4859bc9a9f
commit 14101a3c28
7 changed files with 142 additions and 44 deletions
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24
test/indexexpr1.test
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@ -49,7 +49,7 @@ do_execsql_test indexexpr1-130 {
do_execsql_test indexexpr1-130eqp {
EXPLAIN QUERY PLAN
SELECT c FROM t1 WHERE b=1 AND substr(a,2,3)='nd_' ORDER BY c;
} {/USING INDEX t1ba/}
} {/USING COVERING INDEX t1ba/}
do_execsql_test indexexpr1-140 {
SELECT rowid, substr(a,b,3), '|' FROM t1 ORDER BY 2;
@ -61,7 +61,7 @@ do_execsql_test indexexpr1-141 {
do_execsql_test indexexpr1-141eqp {
EXPLAIN QUERY PLAN
SELECT rowid FROM t1 WHERE substr(a,b,3)<='and' ORDER BY +rowid;
} {/USING INDEX t1abx/}
} {/USING COVERING INDEX t1abx/}
do_execsql_test indexexpr1-142 {
SELECT rowid FROM t1 WHERE +substr(a,b,3)<='and' ORDER BY +rowid;
} {1 2 3}
@ -73,7 +73,7 @@ do_execsql_test indexexpr1-150eqp {
EXPLAIN QUERY PLAN
SELECT rowid FROM t1 WHERE substr(a,b,3) IN ('and','l_t','xyz')
ORDER BY +rowid;
} {/USING INDEX t1abx/}
} {/USING COVERING INDEX t1abx/}
ifcapable altertable {
do_execsql_test indexexpr1-160 {
@ -99,14 +99,14 @@ do_execsql_test indexexpr1-170 {
do_execsql_test indexexpr1-170eqp {
EXPLAIN QUERY PLAN
SELECT length(a) FROM t1 ORDER BY length(a);
} {/SCAN t1 USING INDEX t1alen/}
} {/SCAN t1 USING COVERING INDEX t1alen/}
do_execsql_test indexexpr1-171 {
SELECT length(a) FROM t1 ORDER BY length(a) DESC;
} {52 38 29 27 25 20}
do_execsql_test indexexpr1-171eqp {
EXPLAIN QUERY PLAN
SELECT length(a) FROM t1 ORDER BY length(a) DESC;
} {/SCAN t1 USING INDEX t1alen/}
} {/SCAN t1 USING COVERING INDEX t1alen/}
do_execsql_test indexexpr1-200 {
DROP TABLE t1;
@ -142,7 +142,7 @@ do_execsql_test indexexpr1-230 {
do_execsql_test indexexpr1-230eqp {
EXPLAIN QUERY PLAN
SELECT c FROM t1 WHERE b=1 AND substr(a,2,3)='nd_' ORDER BY c;
} {/USING INDEX t1ba/}
} {/USING COVERING INDEX t1ba/}
do_execsql_test indexexpr1-240 {
SELECT id, substr(a,b,3), '|' FROM t1 ORDER BY 2;
@ -154,7 +154,7 @@ do_execsql_test indexexpr1-241 {
do_execsql_test indexexpr1-241eqp {
EXPLAIN QUERY PLAN
SELECT id FROM t1 WHERE substr(a,b,3)<='and' ORDER BY +id;
} {/USING INDEX t1abx/}
} {/USING COVERING INDEX t1abx/}
do_execsql_test indexexpr1-242 {
SELECT id FROM t1 WHERE +substr(a,b,3)<='and' ORDER BY +id;
} {1 2 3}
@ -166,7 +166,7 @@ do_execsql_test indexexpr1-250eqp {
EXPLAIN QUERY PLAN
SELECT id FROM t1 WHERE substr(a,b,3) IN ('and','l_t','xyz')
ORDER BY +id;
} {/USING INDEX t1abx/}
} {/USING COVERING INDEX t1abx/}
ifcapable altertable {
do_execsql_test indexexpr1-260 {
@ -238,7 +238,7 @@ do_execsql_test indexexpr1-510 {
do_execsql_test indexexpr1-510eqp {
EXPLAIN QUERY PLAN
SELECT substr(a,4,3) AS k FROM cnt, t5 WHERE k=printf('%03d',x);
} {/USING INDEX t5ax/}
} {/USING COVERING INDEX t5ax/}
# Skip-scan on an indexed expression
#
@ -547,7 +547,7 @@ do_execsql_test indexexpr1-2030 {
(3, '{"x":1}', 6, 7);
CREATE INDEX t1x ON t1(d, a, b->>'x', c);
}
do_execsql_test indexexpr1-2030 {
do_execsql_test indexexpr1-2040 {
SELECT a,
SUM(1) AS t1,
SUM(CASE WHEN b->>'x'=1 THEN 1 END) AS t2,
@ -555,7 +555,7 @@ do_execsql_test indexexpr1-2030 {
SUM(CASE WHEN b->>'x'=1 THEN c END) AS t4
FROM t1;
} {1 6 4 54 46}
do_execsql_test indexexpr1-2030 {
do_execsql_test indexexpr1-2050 {
explain query plan
SELECT a,
SUM(1) AS t1,
@ -563,7 +563,7 @@ do_execsql_test indexexpr1-2030 {
SUM(c) AS t3,
SUM(CASE WHEN b->>'x'=1 THEN c END) AS t4
FROM t1;
} {/.*SCAN t1 USING INDEX t1x.*/}
} {/.*SCAN t1 USING COVERING INDEX t1x.*/}
reset_db
do_execsql_test indexexpr1-2100 {