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Experimental changes to improve optimization of DISTINCT queries.

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FossilOrigin-Name: f7ba0219ef2f235543c258be736955d91ca5ecce
This commit is contained in:
dan
2011-06-30 20:17:15 +00:00
parent e1b4f0f177
commit 38cc40c216
14 changed files with 219 additions and 66 deletions
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12
test/e_select.test
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@ -1238,8 +1238,8 @@ do_select_tests e_select-5 {
3.1 "SELECT x FROM h2" {One Two Three Four one two three four}
3.2 "SELECT x FROM h1, h2 ON (x=b)" {One one Four four}
4.1 "SELECT DISTINCT x FROM h2" {four one three two}
4.2 "SELECT DISTINCT x FROM h1, h2 ON (x=b)" {four one}
4.1 "SELECT DISTINCT x FROM h2" {One Two Three Four}
4.2 "SELECT DISTINCT x FROM h1, h2 ON (x=b)" {One Four}
}
# EVIDENCE-OF: R-02054-15343 For the purposes of detecting duplicate
@ -1253,11 +1253,11 @@ do_select_tests e_select-5.5 {
# sequence to compare text values with apply.
#
do_select_tests e_select-5.6 {
1 "SELECT DISTINCT b FROM h1" {I IV four i iv one}
2 "SELECT DISTINCT b COLLATE nocase FROM h1" {four i iv one}
3 "SELECT DISTINCT x FROM h2" {four one three two}
1 "SELECT DISTINCT b FROM h1" {one I i four IV iv}
2 "SELECT DISTINCT b COLLATE nocase FROM h1" {one I four IV}
3 "SELECT DISTINCT x FROM h2" {One Two Three Four}
4 "SELECT DISTINCT x COLLATE binary FROM h2" {
Four One Three Two four one three two
One Two Three Four one two three four
}
}