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When generating individual loops for each ORed term of an OR scan, move any

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constant WHERE expressions outside of the loop, as is done for top-level
loops.

FossilOrigin-Name: e4a022be4b069b08cfdfda5295461676b99d28e17bbbedfbcb362dec69de59bd
This commit is contained in:
dan
2017-06-22 16:51:16 +00:00
parent c45fdb2a7f
commit c456a76fb3
7 changed files with 131 additions and 32 deletions
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6
test/eqp.test
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@ -188,24 +188,24 @@ do_eqp_test 3.1.1 {
do_eqp_test 3.1.2 {
SELECT * FROM t1 WHERE (SELECT x FROM t1 AS sub);
} {
0 0 0 {SCAN TABLE t1}
0 0 0 {EXECUTE SCALAR SUBQUERY 1}
1 0 0 {SCAN TABLE t1 AS sub}
0 0 0 {SCAN TABLE t1}
}
do_eqp_test 3.1.3 {
SELECT * FROM t1 WHERE (SELECT x FROM t1 AS sub ORDER BY y);
} {
0 0 0 {SCAN TABLE t1}
0 0 0 {EXECUTE SCALAR SUBQUERY 1}
1 0 0 {SCAN TABLE t1 AS sub}
1 0 0 {USE TEMP B-TREE FOR ORDER BY}
0 0 0 {SCAN TABLE t1}
}
do_eqp_test 3.1.4 {
SELECT * FROM t1 WHERE (SELECT x FROM t2 ORDER BY x);
} {
0 0 0 {SCAN TABLE t1}
0 0 0 {EXECUTE SCALAR SUBQUERY 1}
1 0 0 {SCAN TABLE t2 USING COVERING INDEX t2i1}
0 0 0 {SCAN TABLE t1}
}
det 3.2.1 {