Date: 2020-06-11 12:14:28 +0200
From: @PedroTadim
To: SQL devs <>
Version: 11.37.7 (Jun2020)

Last updated: 2020-07-27 09:30:14 +0200

Comment 27823

Date: 2020-06-11 12:14:28 +0200
From: @PedroTadim

User-Agent: Mozilla/5.0 (X11; Fedora; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.97 Safari/537.36
Build Identifier:

Run the statements below

Reproducible: Always

Steps to Reproduce:

CREATE TABLE tbl_ProductSales (ColID int, Product_Category varchar(64), Product_Name varchar(64), TotalSales int);
INSERT INTO tbl_ProductSales VALUES (1,'Game','Mobo Game',200),(2,'Game','PKO Game',400),(3,'Fashion','Shirt',500),(4,'Fashion','Shorts',100);
CREATE TABLE another_T (col1 INT, col2 INT, col3 INT, col4 INT, col5 INT, col6 INT, col7 INT, col8 INT);
INSERT INTO another_T VALUES (1,2,3,4,5,6,7,8), (11,22,33,44,55,66,77,88), (111,222,333,444,555,666,777,888), (1111,2222,3333,4444,5555,6666,7777,8888);
create view v0(c0) as (select distinct - (tbl_productsales.totalsales) from tbl_productsales, another_t);
select another_t.col1 from another_t, tbl_productsales cross join v0;

Actual Results:

Crash in the MAL code generation

Expected Results:

Query to successfully compile and give results.

Comment 27824

Date: 2020-06-11 12:45:50 +0200
From: MonetDB Mercurial Repository <>

Changeset 80b0f1dd338f made by Pedro Ferreira pedro.ferreira@monetdbsolutions.com in the MonetDB repo, refers to this bug.

For complete details, see https//devmonetdborg/hg/MonetDB?cmd=changeset;node=80b0f1dd338f

Changeset description:

Fix for bug #6888, ie rel_remove_redundant_join optimizer cannot be applied to cross products