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Fix a problem with handling single row partitions in the percent_rank() window

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function.

FossilOrigin-Name: b84fbf16eac718c151731e2b2dcc73f2f2a144e3670f8566a30793f1e4e6a3ec
This commit is contained in:
dan
2018-06-21 19:20:39 +00:00
parent 9c27758eb4
commit b7306f6f6e
5 changed files with 52 additions and 10 deletions
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test/window4.test
+24
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@@ -1200,4 +1200,28 @@ do_execsql_test 8.2 {
WINDOW win AS (ORDER BY a)
} {1 1 1 1 4 4 {} 8 {} 4 4 2 2 2 1 4 8 8 12 4 8 4 3 3 3 2 4 12 8 {} 8 12 4}
#==========================================================================
do_execsql_test 9.0 {
DROP TABLE IF EXISTS t2;
CREATE TABLE t2(x INTEGER);
INSERT INTO t2 VALUES(1), (1), (1), (4), (4), (6), (7);
} {}
do_execsql_test 9.1 {
SELECT rank() OVER () FROM t2
} {1 1 1 1 1 1 1}
do_execsql_test 9.2 {
SELECT dense_rank() OVER (PARTITION BY x) FROM t2
} {1 1 1 1 1 1 1}
do_test 9.3 {
set myres {}
foreach r [db eval {SELECT x, percent_rank() OVER (PARTITION BY x ORDER BY x) FROM t2}] {
lappend myres [format %.2f [set r]]
}
set myres
} {1.00 0.00 1.00 0.00 1.00 0.00 4.00 0.00 4.00 0.00 6.00 0.00 7.00 0.00}
finish_test