2015-04-13 17:57 GMT+02:00 Day, David <d...@redcom.com>: > Situation > > > > I have a co-developer installing a new Virtual Machine and encountering a > postgres error during the installation. > > One of our SQL patch files is failing unexpectedly. > > > > The patch is attempting to add columns to a table, The table involved > currently has only 2 columns, > > Interactively I can generate the same error in his current state. > > > > psql -h ohio -U redcom ace_db > > psql (9.3.6) > > Type "help" for help. > > > > ace_db=# select * from log.conference_history; > > conf_id | max_size > > ---------+---------- > > (0 rows) > > > > ace_db=# ALTER TABLE log.conference_history ADD talker_limit integer > DEFAULT 0; > > ERROR: tables can have at most 1600 columns > > ace_db=# > > ace_db=# >
There can be removed (invisible columns) select attname from pg_attribute where attrelid = 'test'::regclass and attnum > 0; postgres=# select attname from pg_attribute where attrelid = 'test'::regclass and attnum > 0; ┌─────────┐ │ attname │ ╞═════════╡ │ a │ │ c │ │ d │ └─────────┘ (3 rows) alter table test drop column a, drop column c; postgres=# select attname from pg_attribute where attrelid = 'test'::regclass and attnum > 0; ┌──────────────────────────────┐ │ attname │ ╞══════════════════════════════╡ │ ........pg.dropped.1........ │ │ ........pg.dropped.2........ │ │ d │ └──────────────────────────────┘ (3 rows) postgres=# select count(*) from pg_attribute where attrelid = 'test'::regclass and attnum > 0 and attisdropped; ┌───────┐ │ count │ ╞═══════╡ │ 2 │ └───────┘ (1 row) So maybe it can be a reason of this issue? Pavel > > > > > > > Puzzled ? > > > > > > Any thoughts ? > > > > > > Regards > > > > > > Dave Day >
