On Saturday 05 March 2011 17:46:13 Tom Lane wrote:
> Andres Freund <andres@anarazel.de> writes:
> > On Saturday 05 March 2011 04:44:20 Robert Haas wrote:
> >>> * Collation-related regression failure on buildfarm member pika. This
> >>> is clearly a bug we need to identify, but maybe we can ship the alpha
> >>> without a fix --- for one thing, getting more than one report of the
> >>> problem would be helpful.
> >
> > I have just yesterday hit the same bug while testing some application on
> > then HEAD, so its not just PIKA.
>
> What platform, and what locale/encoding environment?
One debian and one ubuntu x64 box.
I have a WIP patch fixing one of the two issues.
Several places in selfuncs.c didn't setup collations. That lead for example to
errors during patternsel.
The eqproc don't actually currently need the collation information, but I
think it is more consistent.
(attached)
I am currently looking at the other one. Its quite strange:
I can trigger it reliably on my machines.
with gdb attached:
b indexam.c:875 (thats index_getprocinfo)
...
test=# CREATE TABLE foo(a int, b text, c int);
CREATE TABLE
Time: 65.535 ms
test=# INSERT INTO foo VALUES (1, '1', 2);
INSERT 0 1
Time: 66.777 ms
test=# INSERT INTO foo VALUES (1, '2', 2);
INSERT 0 1
Time: 40.687 ms
#play with gdb
test=# CREATE INDEX foo_abc ON foo (a, b,c);
ERROR: locale operation to be invoked, but no collation was derived
...
(gdb) print irel->rd_indcollation[0]
$8 = 0
(gdb) print irel->rd_indcollation[1]
$9 = 100
(gdb) print irel->rd_indcollation[2]
$10 = 0
(gdb)
$11 = 0
(gdb) print irel->rd_index->indcollation.values[0]
$12 = 0
(gdb) print irel->rd_index->indcollation.values[1]
$13 = 0
(gdb) print irel->rd_index->indcollation.values[2]
$14 = 100
(gdb) print irel->rd_index->indcollation.values[3]
$15 = 0
(gdb) print irel->rd_index->indcollation
$16 = {vl_len_ = 8, ndim = 144, dataoffset = 1, elemtype = 0, dim1 = 26,
lbound1 = 3, values = {0}}
The piece of code using indcollation assumes that dataoffset = 0 which seems to
be an valid assumption...
... fmgr_info_collation(irel->rd_index->indcollation.values[attnum-1], locinfo);
...
Thus no valid collation is attached for the text column but a useless one for
the last int column.
Andres
