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Results tagged with postgresql
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user 2443
All versions of PostgreSQL. Add an additional version-specific tag like [postgresql-13] if that context is relevant.
3
votes
Why does adding a smallint column to a postgres query increase execution time 60X?
Short answer: You need a sightly larger work_mem. Try set work_mem in your session.
Explanation:
Compare these two step:
-> Hash (cost=642.32..642.32 rows=25332 width=51) (actual time= …
- 327
1
vote
Migrate Oracle BLOB to Postgres BYTEA or OID
1) BYTEA. Because oid is an unrelated concept.
2) Work mostly out of box, see https://github.com/darold/ora2pg/issues/100 .
- 327
7
votes
Accepted
How does PostgreSQL handle Checkpoints in the middle of a WAL-enabled backup?
You asked:
how postgreSQL will handle the recovery with a pg_data content containing some files which are inconsistent.
pg_start_backup() ensure the data file is at least as new as the checkpoint. …
- 327
1
vote
PostgreSQL is using more memory than I'd expect
To quote http://www.postgresql.org/docs/9.5/static/runtime-config-query.html :
This parameter has no effect on the size of shared memory allocated by
PostgreSQL, nor does it reserve kernel disk cache …
- 327
0
votes
Accepted
In PostgreSQL, will VACUUM reset the dead tuple count (n_dead_tup in pg_stat_all_tables)?
Yes, it resets the value. But it is from the stats collector, not vacuum.
postgres=# create table x (a int);
CREATE TABLE
postgres=# insert into x values (1),(2),(3),(4);
INSERT 0 4
postgres=# delet …
- 327
1
vote
Recreate all foreign keys in all tables as deferrable (batch)
You can update the catalog tables directly.
See http://www.postgresql.org/message-id/[email protected]
- 327
1
vote
1
answer
1k
views
Postgresql INSERT triggers "0 row affected" workaround
In a INSERT trigger based table partition, insert always give "0 row affected". I think this problem is well know, it is even in the todo.
Is there any workarounds for this issue in 9.4?
- 327
2
votes
1
answer
61
views
General purpose view for last value in a group
Is there any way to tell PostgreSQL these two query is equivalent and let it pick them automagically? …
- 327
0
votes
1
answer
2k
views
TEMP table alternatives for pl/pgsql
I am trying to emulate MERGE behavior with pl/pgsql:
-- Generate the data from funtion
CREATE TEMP TABLE temp_x (id int, id2 int, data text, created_at timestamp, updated_at timestamp) ON COMMIT DR …
- 327