Dear George,
this is most probably a bug somewhere in MonetDB.
Please file a bug report at bugs.monetdb.org
Best, Stefan
----- Original Message -----
Hi,
I am still learning about monetdb internals, so I hope someone can enlighten me here.
I was playing around with monetdb, and run into the following problem:
Suppose we have a table
CREATE TABLE test.simple_table("id" INTEGER);
INSERT INTO test.simple_table VALUES (1),(2),(3),(4),(5);
Let's say I want to run a simple query:
SELECT COUNT(*) AS val FROM test.simple_table ORDER BY val DESC;
+----+ | v | +==+ | 5 | +----+
Runs fine. However, if add a LIMIT clause:
SELECT COUNT(*) AS val FROM test.simple_table ORDER BY val DESC LIMIT 5;
I get the following
TypeException:user.s37_7[17]:'algebra.markT' undefined in: _30:any := algebra.markT(_27:oid, _29:oid) program contains errors
Now things let's add a primitive HAVING clause
SELECT COUNT(*) AS val FROM test.simple_table
HAVING 1 > 0
ORDER BY val DESC LIMIT 5;
+----+ | v | +==+ | 5 | +----+
And things are magically fine again. Can someone explain what's going on?
Thanks,
George Ramonov UC Berkeley B.S. Electrical Engineering & Computer Science '13
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