On Feb 3, 2005, at 21:53, pginfo wrote:
I am using pg 7.4.5 on RedHat AS 3.0.
sklad21=# \d a_constants_str Table "public.a_constants_str" Column | Type | Modifiers ------------+-----------------------+----------- constname | character varying(30) | not null fid | integer | not null constvalue | character varying(30) | Indexes: "a_constants_str_pkey" primary key, btree (constname, fid)
sklad21=# select * from a_constants_str ; constname | fid | constvalue -----------+-----+------------- AACCGRID | 0 | SOF_3 AKLTYPID | 0 | SOF_3 ADARID | 0 | SOF_2 AOBLASTID | 0 | SOF_6 AUSERID | 0 | SOF_17 ANMGRID | 0 | SOF_21 LOCAID | 0 | SOF_41 DOCID | 0 | SOF_1585254 DOCPLAID | 0 | SOF_1052900 AKLIID | 0 | SOF_18740 DOCRID | 0 | SOF_2268142 DOCPOGPLA | 0 | SOF_324586 DOCID | 0 | SOF_1585254 DOCID | 0 | SOF_1585254 DOCID | 0 | SOF_1585254 AKLGRID | 0 | SOF_45 DOCID | 0 | SOF_1585254 DOCID | 0 | SOF_1585254 ASETUPID | 0 | SOF_4605 DOCID | 0 | SOF_1585254 DOCID | 0 | SOF_1585254 TDOCID | 0 | SOF_337 TDOCRID | 0 | SOF_19450 DOCID | 0 | SOF_1585254 DOCID | 0 | SOF_1585254 AGRADID | 0 | SOF_256 DOCID | 0 | SOF_1585254 ASLUID | 0 | SOF_46 NASTRF | 0 | SOF_88 ANOMID | 0 | SOF_1200 (30 rows)
Pls., see the records with 'DOCID' and note we have primary key defined.
It's unclear from just this data, but there's a chance that there are varying numbers of spaces after 'DOCID', which would appear as separate values for the index, even though they aren't readily apparent. Could you show us the results of the following query?
select constname, length(constname) as constname_length from a_constants_str;
Here's another one which would show if PostgreSQL is treating them equally:
select constname, count(constname) from a_constants_str;
The results of these queries might shed some light on the issue.
Hope this helps.
Michael Glaesemann grzm myrealbox com
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