Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

View returns erroneous result for squared average function as compared to query #2790

Closed
monetdb-team opened this issue Nov 30, 2020 · 0 comments
Closed
Labels

Comments

@monetdb-team
Copy link

@monetdb-team monetdb-team commented Nov 30, 2020

Date: 2011-03-10 14:15:33 +0100
From: @bartscheers
To: SQL devs <>
Version: 2.40.1 (Oct2010) [obsolete]
CC: @njnes

Last updated: 2011-03-28 17:31:32 +0200

Comment 15562

Date: 2011-03-10 14:15:33 +0100
From: @bartscheers

User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-GB; rv:1.9.2.14) Gecko/20110301 Fedora/3.6.14-1.fc14 Firefox/3.6.14
Build Identifier:

This bug might be related to 2739.

Using version Oct2010-SP1.
When executing a query with avg(d)*avg(d) the results are correct, but when this is created within a view, the results are wrong.

Reproducible: Always

Steps to Reproduce:

  1. create table t (d double);
  2. insert into d values (2),(3);
  3. select avg(d) as avg_d, avg(d*d) as avg_d2, avg(d)*avg(d) as avg2_d_mult from t;
    this gives the expected results.
  4. create view tv as select avg(d) as avg_d, avg(d*d) as avg_d2, avg(d)*avg(d) as avg2_d_mult from t;
    this gives for avg2_d_mult the wrong results.

Actual Results:

View returns erroneous value.

Expected Results:

Correct result

Tried a workaround by using power(avg(d),2) but this did also not work.

  1. select avg(d) as avg_d, avg(d*d) as avg_d2, power(avg(d),2) as avg2_d_pow from t;
  2. create view tv1 as select avg(d) as avg_d, avg(d*d) as avg_d2, power(avg(d),2) as avg2_d_pow from t;
  3. select * from tv1;
    TypeException:user.s0_1[48]:'mmath.pow' undefined in: _60:any := mmath.pow(_29:wrd, _59:dbl)
    SQLException:SQLengine:Program contains errors

Comment 15605

Date: 2011-03-18 16:42:53 +0100
From: @njnes

added test view_avg_incorrect_result.Bug-2790.sql
fixed by using unique label numbers

Comment 15630

Date: 2011-03-28 17:31:32 +0200
From: @sjoerdmullender

The Mar2011 version has been released.

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
Projects
None yet
Linked pull requests

Successfully merging a pull request may close this issue.

None yet
1 participant