Furthermore, I've found another example of a window function returning
incorrect results.
Using the above "sample" table and sample data, the following query
produces the wrong results.
Query:
SELECT "counter", "value", SUM("value") OVER (ORDER BY "id" ROWS 2
PRECEDING)
FROM "sample"
ORDER BY "id"
Expected results:
1, 10., 10.
1, 20., 30.
2, 1., 31.
2, 3., 24.
3, 100., 104.
SQLite is reporting the following results:
1, 10., 10.
1, 20., 30.
2, 1., 31.
2, 3., 44.
3, 100., 164.
I hope that helps diagnose the issue.
On Mon, Jul 2, 2018 at 10:55 AM, Charles Leifer <[email protected]> wrote:
> Oh, and gdb is reporting the segfault occurs in "dupedExprSize".
>
> Partial traceback:
>
> #0 0x00007ffff4d4645b in dupedExprSize () from
> /usr/local/lib/libsqlite3.so.0
> No symbol table info available.
> #1 0x00007ffff4d5bf12 in exprDup () from /usr/local/lib/libsqlite3.so.0
> No symbol table info available.
> #2 0x00007ffff4d5c091 in sqlite3ExprListDup () from
> /usr/local/lib/libsqlite3.so.0
> No symbol table info available.
> #3 0x00007ffff4dbfa4f in sqlite3Select () from
> /usr/local/lib/libsqlite3.so.0
> No symbol table info available.
> #4 0x00007ffff4df082b in sqlite3RunParser () from
> /usr/local/lib/libsqlite3.so.0
> No symbol table info available.
>
>
> On Mon, Jul 2, 2018 at 10:54 AM, Charles Leifer <[email protected]>
> wrote:
>
>> I'm getting a segfault with the following query, which uses window
>> functions:
>>
>> SELECT "t1"."counter", "t1"."value", RANK() OVER w AS "rank"
>> FROM "sample" AS "t1"
>> WINDOW w AS (PARTITION BY "t1"."counter" ORDER BY "t1"."value" DESC)
>> ORDER BY "t1"."counter", RANK() OVER w
>>
>> The sql used to create the "sample" table:
>>
>> CREATE TABLE IF NOT EXISTS "sample" (
>> "id" INTEGER NOT NULL PRIMARY KEY,
>> "counter" INTEGER NOT NULL,
>> "value" REAL NOT NULL);
>>
>> Test data:
>>
>> INSERT INTO "sample" (counter, value) VALUES (1, 10.), (1, 20.), (2, 1.),
>> (2, 3.), (3, 100.);
>>
>> The expected output for the window query is:
>>
>> 1, 20., 1
>> 1, 10., 2
>> 2, 3., 1
>> 2, 1., 2
>> 3, 100., 1
>>
>
>
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