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

incorrect automatic cast from decimal to tinyint #3342

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

incorrect automatic cast from decimal to tinyint #3342

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


Copy link

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

Date: 2013-08-15 00:53:49 +0200
From: Tim H. <<monetdb.bug.reporter>>
To: SQL devs <>
Version: 11.15.7 (Feb2013-SP2)
CC: @njnes

Last updated: 2013-09-27 13:47:13 +0200

Comment 19001

Date: 2013-08-15 00:53:49 +0200
From: Tim H. <<monetdb.bug.reporter>>

User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:22.0) Gecko/20100101 Firefox/22.0
Build Identifier:

There is no sys.median function overload for the decimal type, so calling select on sys.median on a decimal column causes MonetDB to try to find an automatic conversion. Unfortunately it chooses tinyint instead of decimal for the conversion, and the query fails at runtime.

Reproducible: Always

Steps to Reproduce:

  1. Connect as user monetdb in mclient
  2. Run the following commands
    create table part (p_partkey integer not null, p_name varchar(55) not null, p_mfgr char(25) not null, p_brand char(10) not null, p_type varchar(25) not null, p_size integer not null, p_container char(10) not null, p_retailprice decimal(12,2) not null, p_comment varchar(23) not null);
    copy 5 records into part from stdin;
    1|goldenrod lavender spring chocolate lace|Manufacturer1|Brand13|PROMO BURNISHED COPPER|7|JUMBO PKG|901.00|ly. slyly ironi|
    2|maroon sky cream royal snow|Manufacturer1|Brand13|LARGE BRUSHED BRASS|1|LG CASE|902.00|lar accounts amo|
    3|brown blue puff midnight black|Manufacturer4|Brand42|STANDARD POLISHED BRASS|21|WRAP CASE|903.00|egular deposits hag|
    4|orange goldenrod peach misty seashell|Manufacturer3|Brand34|SMALL PLATED BRASS|14|MED DRUM|904.00|p furiously r|
    5|midnight linen almond tomato plum|Manufacturer3|Brand32|STANDARD POLISHED TIN|15|SM PKG|905.00| wake carefully |

select sys.median(cast (p_retailprice as double)) from part;
select sys.median(p_retailprice) from part;

Actual Results:

value (901) exceeds limits of type bte

Expected Results:

| L1 |
| 903 |

The issue is in the _rel_aggr function in rel_select.c. After not finding an exact match for sys.median(decimal), the code calls sql_find_aggr. This returns only one sys.median definition (there are 10), which is the sys.median defined for tinyint.

Comment 19027

Date: 2013-08-18 23:05:14 +0200
From: MonetDB Mercurial Repository <>

Changeset 46f634cbe540 made by Niels Nes in the MonetDB repo, refers to this bug.

For complete details, see http//devmonetdborg/hg/MonetDB?cmd=changeset;node=46f634cbe540

Changeset description:

fixed bug #3342, ie cast a numeric up when a direct aggregation function isn't found.

Comment 19028

Date: 2013-08-18 23:08:03 +0200
From: @njnes

fixed, when a direct aggregation function is missing we now cast numerics to a super type.

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

Successfully merging a pull request may close this issue.

None yet
1 participant