Using PG 7.4.5 on Mac OS X 10.3 ...
I have a primary key that I can't destroy and can't create. One weird symptom is that when I use \d in psql to attempt to display the constraint, there is no output at all! Normally, psql either shows the constraint or reports that the constraint doesn't exist.
(BTW, I know that the default clauses below are kind of weird, but I am using PG to process data for a database that doesn't use NULL and uses 0 and empty strings as default values. The DDL is generated automatically, so the defaults don't all make sense, but they should be harmless. Don't worry; the app is almost ported to PG ;-)
In the transcript below, snp_main_chr22 is the table, and there is supposed to be a primary key snp_main_chr22_pk on the refsnp_id column:
egenome_test=# egenome_test=# \d snp_main_chr22
Table "build.snp_main_chr22"
Column | Type | Modifiers
-------------+-----------------------+-------------------------------
refsnp_id | integer | default 0
variation | character varying(10) | default ''::character varying
het | character varying(20) | default ''::character varying
validated | character varying(5) | default ''::character varying
chr | character varying(2) | default ''::character varying
assay_size | integer | default 0
pop_size | integer | default 0
seq_pos | integer | default 0
transcribed | character varying(1) | default ''::character varying
egenome_test=#egenome_test=# alter table snp_main_chr22 drop constraint snp_main_chr22_pk;
ERROR: constraint "snp_main_chr22_pk" does not exist
egenome_test=# drop table snp_main_chr22 cascade; DROP TABLE
egenome_test=# \d snp_main_chr22_pk
egenome_test=# \d snp_main_chr22_pk_gibberish Did not find any relation named "snp_main_chr22_pk_gibberish".
egenome_test=# CREATE TABLE snp_main_chr22 (
refsnp_id integer DEFAULT 0,
variation varchar(10) DEFAULT '',
het varchar(20) DEFAULT '',
validated varchar(5) DEFAULT '',
chr varchar(2) DEFAULT '',
assay_size integer DEFAULT 0,
pop_size integer DEFAULT 0,
seq_pos integer DEFAULT 0,
transcribed varchar(1) DEFAULT ''
);
egenome_test(# egenome_test(# egenome_test(# egenome_test(# egenome_test(# egenome_test(# egenome_test(# egenome_test(# egenome_test(# egenome_test(# CREATE TABLE
egenome_test=# ALTER TABLE snp_main_chr22
ADD CONSTRAINT snp_main_chr22_pk
PRIMARY KEY (refsnp_id)
;
egenome_test-# egenome_test-# egenome_test-# NOTICE: ALTER TABLE / ADD PRIMARY KEY will create implicit index "snp_main_chr22_pk" for table "snp_main_chr22"
ERROR: relation "snp_main_chr22_pk" already exists
egenome_test=# egenome_test=# \d snp_main_chr22
Table "build.snp_main_chr22"
Column | Type | Modifiers
-------------+-----------------------+-------------------------------
refsnp_id | integer | default 0
variation | character varying(10) | default ''::character varying
het | character varying(20) | default ''::character varying
validated | character varying(5) | default ''::character varying
chr | character varying(2) | default ''::character varying
assay_size | integer | default 0
pop_size | integer | default 0
seq_pos | integer | default 0
transcribed | character varying(1) | default ''::character varying
egenome_test=#
Thanks for any advice.
Kevin Murphy
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