I've been working on some queries involving multiple unnested columns. At
first, I expected the number of rows returned would be the product of the
array lengths, so that this query would return 4 rows:
SELECT unnest2(array['a','b']),unnest2(array['1','2']);
when in fact it returns 2:
unnest2
2013/3/27 Ken Tanzer ken.tan...@gmail.com
I've been working on some queries involving multiple unnested columns. At
first, I expected the number of rows returned would be the product of the
array lengths, so that this query would return 4 rows:
SELECT
Basically you are getting Cartesian joins on the row output of
unnest()
Well that's what I expected too. Except look at this example, after you
delete c:
testdb=# DELETE FROM t2 where val='c';
DELETE 1
testdb=# SELECT * from t1, t2;
val | val
-+-
1 | a
1 | b
2 | a
2 | b
2013/3/27 Ken Tanzer ken.tan...@gmail.com
Basically you are getting Cartesian joins on the row output of
unnest()
Well that's what I expected too. Except look at this example, after you
delete c:
testdb=# DELETE FROM t2 where val='c';
DELETE 1
testdb=# SELECT * from t1, t2;
val | val
On 27/03/13 20:36, Ian Lawrence Barwick wrote:
2013/3/27 Ken Tanzer ken.tan...@gmail.com mailto:ken.tan...@gmail.com
Basically you are getting Cartesian joins on the row output of
unnest()
Well that's what I expected too. Except look at this example,
after you delete
Hi,
You can try:
SELECT c1, c2 FROM
(
WITH a AS
(
SELECT row_number() OVER(),* FROM unnest(array['a','b', 'c', 'd']) c1
),
b AS
(
SELECT row_number() OVER(),* FROM unnest(array['1','2', '3']) c2
)
SELECT * FROM a LEFT JOIN b USING (row_number)
UNION
SELECT * FROM a RIGHT JOIN b USING
Tom Lane, 26.03.2013 17:16:
The lack of any prohibition to the contrary means there is no way to
argue that the code you showed previously violates the spec; thus,
a database that fails to accept it is rejecting spec-compliant DDL.
I'm not claiming that the spec is violated...
(And I'm not
Alban Hertroys, 26.03.2013 17:17:
It can make sense during a maintenance window, if you create a new
(redundant) FK constraint concurrently to replace the existing one.
If you'd first remove the existing constraint, you're allowing FK
violations until the new constraint has finished creating its
Gavin Flower gavinflo...@archidevsys.co.nz writes:
The rule appears to be,
where N_x N_y are the number of entries returned for x y:
N_result = is the smallest positive integer that has N_x N_y as factors.
Right: if there are multiple set-returning functions in a SELECT list,
the number of
-BEGIN PGP SIGNED MESSAGE-
Hash: RIPEMD160
is there any way to use a module within a pltcl script, i.e. have
load /path/to/mystuff.so
or
package require mystuff
in a script.
You can load tcl code by putting it in the pltcl_modules tables. See:
On 2013-03-26 19:28, Kevin Grittner wrote:
Why are full vacuums excluded from this statistic? It looks like there's
no way to get the date of the last manual vacuum, if only full vacuums
are performed.
Because FULL is a bit of a misnomer -- there are important things a
non-FULL vacuum does
2013/3/27 Tom Lane t...@sss.pgh.pa.us:
Gavin Flower gavinflo...@archidevsys.co.nz writes:
The rule appears to be,
where N_x N_y are the number of entries returned for x y:
N_result = is the smallest positive integer that has N_x N_y as factors.
Right: if there are multiple set-returning
Thomas Kellerer spam_ea...@gmx.net wrote:
Alban Hertroys, 26.03.2013 17:17:
It can make sense during a maintenance window, if you create a new
(redundant) FK constraint concurrently to replace the existing one.
If you'd first remove the existing constraint, you're allowing FK
violations until
-BEGIN PGP SIGNED MESSAGE-
Hash: RIPEMD160
is there any way to use a module within a pltcl script, i.e. have
load /path/to/mystuff.so
or
package require mystuff
in a script.
You can load tcl code by putting it in the pltcl_modules tables. See:
Hello,
I have a database which is bloated because of vacuum full, so you find indexes
bigger than the table itself.
I have dumped this database and restored it without reindixing and it was
extremely slow. So, my question what is the relation between bloated database
and pg_restore.
Hi,
Sorry for asking such a newbie-question, I've used a search engine -
however I haven't found what I am searching for.
Is there any way to listen to NOTIFY in php without polling using a
callback or blocking call?
I've only found pg_get_notify(), however it requires polling as far as
I
In response to Clemens Eisserer linuxhi...@gmail.com:
Is there any way to listen to NOTIFY in php without polling using a
callback or blocking call?
Not at this time.
--
Bill Moran
http://www.potentialtech.com
http://people.collaborativefusion.com/~wmoran/
--
Sent via pgsql-general
Hi Bill,
Is there any way to listen to NOTIFY in php without polling using a
callback or blocking call?
Not at this time.
Too bad ... Thanks for the confirmation.
I'll try to invoke a native libpg binary which stays alive until a
NOTIFY is received, should do the trick in case
Hi,
What is the main goal?
even using libpg - you need to call pg notify... Doc says, just using
libpgtcl would be possible to get Notify event - without checking from time
to time...
Kind Regards,
Misa
2013/3/27 Clemens Eisserer linuxhi...@gmail.com
Hi Bill,
Is there any way to listen
Hi Misa
What is the main goal?
The main goal is to perform some inter-system communication in the
case some rows in one table are updated (very seldom event).
even using libpg - you need to call pg notify... Doc says, just using
libpgtcl would be possible to get Notify event - without
Hi Clemens,
Well, I am not sure what you mean by polling...
But Example shows - that C app - actually asks all the time to get
notify... when gets something more then 4 times - exit... until 4 times
loops...
The same you can achieve with PHP...
But I am not sure that is the main goal...
My
In contrast to certain other open-source databases, PostgreSQL leans
toward protecting data from surprises and erroneous input, i.e.
rejecting a date of 2013-02-31 instead of arbitrarily assigning a date
of 2013-03-03. Similar throw error instead of take a guess
philosophy applies to numeric
Hi Misa
But Example shows - that C app - actually asks all the time to get notify...
when gets something more then 4 times - exit... until 4 times loops...
The same you can achieve with PHP...
As far as I understood, with php I have to query the server again and
again, and pg_get_notify will
Hello,
On Wed, Mar 27, 2013 at 9:56 AM, salah jubeh s_ju...@yahoo.com wrote:
I have a database which is bloated because of vacuum full, so you find
indexes bigger than the table itself.
Table can not be bloated because of vacuum full, it removes bloat from
the table and its indexes. The fact
Sergey Konoplev gray...@gmail.com writes:
On Wed, Mar 27, 2013 at 9:56 AM, salah jubeh s_ju...@yahoo.com wrote:
I have a database which is bloated because of vacuum full, so you find
indexes bigger than the table itself.
Table can not be bloated because of vacuum full, it removes bloat from
I found a workaround: domain type defined as: CREATE DOMAIN currency AS
numeric(16,4);
Thank you!
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