Обсуждение: v6.3 snapshot core dump

this is the latest snapshot under linux 2.0.33

when I create a view with an aggregate such as count (with a group by
clause) I get a core dump.  The first three lines of the gdb backtrace
follows:

#0  0x80a9982 in ExecEvalAggreg (agg=0x820fa20, econtext=0x8213a48,
    isNull=0xbfffd6cf "") at execQual.c:201
#1  0x80ab271 in ExecEvalExpr (expression=0x820fa20, econtext=0x8213a48,
    isNull=0xbfffd6cf "", isDone=0xbfffd7c3 "\001\fZ\031\b\030K!\b")
    at execQual.c:1199
#2  0x80ab69b in ExecTargetList (targetlist=0x8213498, nodomains=2,
    targettype=0x8214990, values=0x8214b48, econtext=0x8213a48,
    isDone=0xbfffd7c3 "\001\fZ\031\b\030K!\b") at execQual.c:1484

code at point:

201             *isNull = econtext->ecxt_nulls[agg->aggno];

econtext->ecxt_nulls, is, well, a NULL pointer and hard to index :)
i'll take a look but I don't think I'll find it -- i notice that 6.2.1
pretends to make a view with aggregates but then it comes up empty
when selected.

--brett
let me know if you need more info

Brett McCormick wrote:
>
> this is the latest snapshot under linux 2.0.33
>
> when I create a view with an aggregate such as count (with a group by
> clause) I get a core dump.  The first three lines of the gdb backtrace
> follows:
...
>
> 201             *isNull = econtext->ecxt_nulls[agg->aggno];
>
> econtext->ecxt_nulls, is, well, a NULL pointer and hard to index :)
> i'll take a look but I don't think I'll find it -- i notice that 6.2.1
> pretends to make a view with aggregates but then it comes up empty
> when selected.
>
> --brett
> let me know if you need more info

Did this work in previous 6.3 snapshots ?

Vadim

On Fri, 13 February 1998, at 19:11:26, Vadim B. Mikheev wrote:

> > econtext->ecxt_nulls, is, well, a NULL pointer and hard to index :)
> > i'll take a look but I don't think I'll find it -- i notice that 6.2.1
> > pretends to make a view with aggregates but then it comes up empty
> > when selected.
> >
> > --brett
> > let me know if you need more info
>
> Did this work in previous 6.3 snapshots ?
>
> Vadim

I never attempted it before.

I will look into this.  I made many fixes in 6.3 for aggregates and
views, but I did not test views of aggregates.  I will do that soon.

Good test case.

>
>
> this is the latest snapshot under linux 2.0.33
>
> when I create a view with an aggregate such as count (with a group by
> clause) I get a core dump.  The first three lines of the gdb backtrace
> follows:
>
> #0  0x80a9982 in ExecEvalAggreg (agg=0x820fa20, econtext=0x8213a48,
>     isNull=0xbfffd6cf "") at execQual.c:201
> #1  0x80ab271 in ExecEvalExpr (expression=0x820fa20, econtext=0x8213a48,
>     isNull=0xbfffd6cf "", isDone=0xbfffd7c3 "\001\fZ\031\b\030K!\b")
>     at execQual.c:1199
> #2  0x80ab69b in ExecTargetList (targetlist=0x8213498, nodomains=2,
>     targettype=0x8214990, values=0x8214b48, econtext=0x8213a48,
>     isDone=0xbfffd7c3 "\001\fZ\031\b\030K!\b") at execQual.c:1484
>
> code at point:
>
> 201             *isNull = econtext->ecxt_nulls[agg->aggno];
>
> econtext->ecxt_nulls, is, well, a NULL pointer and hard to index :)
> i'll take a look but I don't think I'll find it -- i notice that 6.2.1
> pretends to make a view with aggregates but then it comes up empty
> when selected.
>
> --brett
> let me know if you need more info
>
>


--
Bruce Momjian
maillist@candle.pha.pa.us