Re: [GENERAL] Select query regarding info

2015-06-18 Thread Thomas Kellerer
> Could you please provide below information. > > How to change standard_conforming_strings value of postgresql.conf? I would not change that option. You should rather stick to standard conforming strings and fix your query. That can be done through a simple (and automated) search & replace.

Re: [GENERAL] Select query regarding info

2015-06-18 Thread Bill Moran
On Thu, 18 Jun 2015 07:29:37 + "Yogesh. Sharma" wrote: > HI Everyone, > > Below DB query is showing below error on postgresql9.3. > SELECT '\'' || t2.name || '\'', '\'' || t1.phone_number || '\'', '\'' || > t1.details || '\'', '\'' || t1.description || '\'', '\'' || (CASE WHEN > t1.s_id IS

Re: [GENERAL] Select Query Implementation:Details needed

2012-10-30 Thread Seref Arikan
Fantastic resource. Thanks for this! On Tue, Oct 30, 2012 at 3:16 PM, Adrian Klaver wrote: > On 10/30/2012 04:07 AM, RAJDEEP SARDAR wrote: > >> Dear All, >> >> I am a Mtech Student,IIT Bombay,India. >> >> I am having a database course project where I need to make some >> modification in postgresq

Re: [GENERAL] Select Query Implementation:Details needed

2012-10-30 Thread Adrian Klaver
On 10/30/2012 04:07 AM, RAJDEEP SARDAR wrote: Dear All, I am a Mtech Student,IIT Bombay,India. I am having a database course project where I need to make some modification in postgresql. currently,my objective is to find how a select query runs in postgresql.I have some knowledge related to pa

Re: [GENERAL] SELECT Query on DB table preventing inserts

2011-10-21 Thread Dan Scott
Hi, Sorry for the late response on this. On Wed, Aug 31, 2011 at 09:40, Tomas Vondra wrote: > On 31 Srpen 2011, 1:07, Dan Scott wrote: >> On Tue, Aug 30, 2011 at 13:52, Daniel Verite >> wrote: >>>        Dan Scott wrote: >>> the insert process is unable to insert new rows into the database

Re: [GENERAL] SELECT Query on DB table preventing inserts

2011-08-31 Thread Tomas Vondra
On 31 Srpen 2011, 1:07, Dan Scott wrote: > On Tue, Aug 30, 2011 at 13:52, Daniel Verite > wrote: >>        Dan Scott wrote: >> >>> the insert process is unable to insert new rows into the database >> >> You should probably provide the error message on insert or otherwise >> describe >> how it's no

Re: [GENERAL] SELECT Query on DB table preventing inserts

2011-08-31 Thread Dan Scott
On Tue, Aug 30, 2011 at 13:21, Scott Ribe wrote: > On Aug 30, 2011, at 8:22 AM, Dan Scott wrote: > >> Perhaps because I'm locking the table with my query? > > Do you mean you're explicitly locking the table? If so, why??? No, not explicitly. I just thought of it as a possible explanation. If read

Re: [GENERAL] SELECT Query on DB table preventing inserts

2011-08-31 Thread Dan Scott
On Tue, Aug 30, 2011 at 13:52, Daniel Verite wrote: >        Dan Scott wrote: > >> the insert process is unable to insert new rows into the database > > You should probably provide the error message on insert or otherwise describe > how it's not working. Normally reading does not unintentionally p

Re: [GENERAL] SELECT Query on DB table preventing inserts

2011-08-30 Thread Daniel Verite
Dan Scott wrote: > the insert process is unable to insert new rows into the database You should probably provide the error message on insert or otherwise describe how it's not working. Normally reading does not unintentionally prevent writing in a concurrent session. Best regards, -- Da

Re: [GENERAL] SELECT Query on DB table preventing inserts

2011-08-30 Thread Scott Ribe
On Aug 30, 2011, at 8:22 AM, Dan Scott wrote: > Perhaps because I'm locking the table with my query? Do you mean you're explicitly locking the table? If so, why??? -- Scott Ribe scott_r...@elevated-dev.com http://www.elevated-dev.com/ (303) 722-0567 voice -- Sent via pgsql-general mailing

Re: [GENERAL] Select query ignores index on large table

2011-01-28 Thread Michael Kemanetzis
I am answering just for the sake of answering your questions. What hubert depesz lubaczewski suggested had fixed the problem i had. I have other queries that need event_id to be the clustered index Veh_id is spread all over the table. (for veh_id 3 there are no records) Due to the spread of reco

Re: [GENERAL] Select query ignores index on large table

2011-01-28 Thread Michael Kemanetzis
Thanks, it did help. Now queries run in zero time. I had thought of doing thatbut since the same configuration was working ok on MSSQL I thought it should also here. Now with that index the server query times are a lot faster than MSSQL without it. Since it is working I will leave it like that

Re: [GENERAL] Select query ignores index on large table

2011-01-27 Thread Alban Hertroys
On 27 Jan 2011, at 15:04, Michael Kemanetzis wrote: > Hello, I'm experiencing a strange behavior running a simple select query on a > table that has about 12 million rows. Specifically, changing the "LIMIT" > value seems to change the execution plan but the result in one of the cases > is unjus

Re: [GENERAL] Select query ignores index on large table

2011-01-27 Thread hubert depesz lubaczewski
On Thu, Jan 27, 2011 at 04:04:02PM +0200, Michael Kemanetzis wrote: > Hello, I'm experiencing a strange behavior running a simple select query on > a table that has about 12 million rows. Specifically, changing the "LIMIT" > value seems to change the execution plan but the result in one of the case

Re: [GENERAL] select query on Dates stored as varchar

2010-08-30 Thread Yosef Haas
-Original Message- From: Jeff Davis [mailto:pg...@j-davis.com] Sent: Monday, August 30, 2010 5:23 PM To: Yosef Haas Cc: pgsql-general@postgresql.org Subject: Re: [GENERAL] select query on Dates stored as varchar On Mon, 2010-08-30 at 16:32 -0400, Yosef Haas wrote: > I have a table (tra

Re: [GENERAL] select query on Dates stored as varchar

2010-08-30 Thread Jeff Davis
On Mon, 2010-08-30 at 16:32 -0400, Yosef Haas wrote: > I have a table (transactions) with an order_date field that is > varchar(32). The data looks like this: > > > > order_date > > --- > > 20100623 02:16:40 > > 20100623 04:32:41 > > 20100625 04:18:53 > > 20100625 07:53

Re: [GENERAL] select query on Dates stored as varchar

2010-08-30 Thread Pavel Stehule
t; -Original Message- > From: Pavel Stehule [mailto:pavel.steh...@gmail.com] > Sent: Monday, August 30, 2010 4:45 PM > To: Yosef Haas > Cc: pgsql-general@postgresql.org > Subject: Re: [GENERAL] select query on Dates stored as varchar > > Hello > > 2010/8/30 Yosef Haas : &

Re: [GENERAL] select query on Dates stored as varchar

2010-08-30 Thread Pavel Stehule
2010/8/30 Scott Marlowe : > On Mon, Aug 30, 2010 at 2:53 PM, Yosef Haas wrote: >> I know it would be best to change the data type of the column (I didn't >> initially create the table), but doing so would be require changes to >> several application that use it and I'd like to avoid that if possib

Re: [GENERAL] select query on Dates stored as varchar

2010-08-30 Thread Scott Marlowe
On Mon, Aug 30, 2010 at 2:53 PM, Yosef Haas wrote: > I know it would be best to change the data type of the column (I didn't > initially create the table), but doing so would be require changes to > several application that use it and I'd like to avoid that if possible. 1. Most of those changes w

Re: [GENERAL] select query on Dates stored as varchar

2010-08-30 Thread Yosef Haas
rom: Pavel Stehule [mailto:pavel.steh...@gmail.com] Sent: Monday, August 30, 2010 4:45 PM To: Yosef Haas Cc: pgsql-general@postgresql.org Subject: Re: [GENERAL] select query on Dates stored as varchar Hello 2010/8/30 Yosef Haas : > I have a table (transactions) with an order_date field that

Re: [GENERAL] select query on Dates stored as varchar

2010-08-30 Thread Pavel Stehule
Hello 2010/8/30 Yosef Haas : > I have a table (transactions) with an order_date field that is varchar(32). > The data looks like this: > > > >     order_date > > --- > > 20100623 02:16:40 > > 20100623 04:32:41 > > 20100625 04:18:53 > > 20100625 07:53:24 > > > > In my current databa

Re: [GENERAL] SELECT query experts, anyone?

2008-08-20 Thread Mark Roberts
If you put this in the application, you could do something such as: my @manufacturers = fetch("select manufacturer_no, name from manufacturers"); my @select_fields = ('product_no'); foreach my $manufacturer (@manufacturers) { my $manuf_no = $manufacturer->{manufacturer_no}; my $name = $man

Re: [GENERAL] SELECT query experts, anyone?

2008-08-20 Thread Tino Wildenhain
Teemu Juntunen wrote: Hi Experts, is threre any way to SELECT values in columns instead of rows? For example select products and their manufacters in the followin way: product1; manufacturer1; manufacturer2;,,, manufacturerN product2; manufacturer3; product3; manufacturer1;.. manufacturerN-

Re: [GENERAL] SELECT Query returns empty

2008-07-09 Thread Klint Gore
Bright D.L. wrote: >Once step 6 completes, can psql see the data? Yes, P1 makes sure and is able to see the data before sending Packet to P2. Not P1, but psql. If you can see the data from psql, then your problem has to be in P2. If you can't see the data from psql, then P1 is the probl

Re: [GENERAL] SELECT Query returns empty

2008-07-09 Thread Tom Lane
"Bright D.L." <[EMAIL PROTECTED]> writes: > P1 did commit its insertion and verified it by successfully querying the > last inserted data, before sending the TCP packet - the trigger - to P2 The fact that P1 can see data it inserted is no proof at all that it's committed its transaction. I think

Re: [GENERAL] SELECT Query returns empty

2008-07-09 Thread Bright D.L.
>> Processes P1 and P2 are executables developed in VC++. These are the >> steps performed by P1 before sending the TCP packet (which acts as a >> trigger) to P2. >> >> 1) Create an insertion query >> 2) Execute the query >> 3) Execute a 'Commit' command > 4) Repeat 2 and 3 how many ever times need

Re: [GENERAL] SELECT Query returns empty

2008-07-09 Thread Klint Gore
Bright D.L. wrote: Processes P1 and P2 are executables developed in VC++. These are the steps performed by P1 before sending the TCP packet (which acts as a trigger) to P2. 1) Create an insertion query 2) Execute the query 3) Execute a 'Commit' command 4) Repeat 2 and 3 how many ever times neede

Re: [GENERAL] SELECT Query returns empty

2008-07-09 Thread Bright D.L.
>hi, >have a look at transaction isolation in docs Thanks TM. I checked the isolation level of the DB and it is "read committed". May be I will change it to 'Serializable' and check whether that helps. >/tm -- Sent via pgsql-general mailing list (pgsql-general@postgresql.org) To make changes

Re: [GENERAL] SELECT Query returns empty

2008-07-09 Thread Bright D.L.
>> The scenario: >> There are two separate processes ? one (P1) inserting (not >> updating) data to a table at a high rate (around one record in 10ms) and >> another (P2) selecting the data from the same table for further >>processing. P1 >> and P2 use separate connection to the Databas

Re: [GENERAL] SELECT Query returns empty

2008-07-09 Thread Bright D.L.
Thank you Craig, >At a guess: transactional visibility. P1 will have not yet committed its >transaction, so the data isn't visible to P2 yet. Remember, PostgreSQL >defaults to the READ COMMITTED isolation level and does not offer READ >UNCOMMITTED for those rare situations where you might want it.

Re: [GENERAL] SELECT Query returns empty

2008-07-09 Thread Craig Ringer
Bright D.L. wrote: > I would like to know why P1 can retrieve the data from the table while > P2 can't. At a guess: transactional visibility. P1 will have not yet committed its transaction, so the data isn't visible to P2 yet. Remember, PostgreSQL defaults to the READ COMMITTED isolation level an

Re: [GENERAL] SELECT Query returns empty

2008-07-09 Thread A. Kretschmer
am Wed, dem 09.07.2008, um 16:32:11 +0800 mailte Bright D.L. folgendes: > The scenario: > There are two separate processes ? one (P1) inserting (not > updating) data to a table at a high rate (around one record in 10ms) and > another (P2) selecting the data from the same table for furt

Re: [GENERAL] SELECT Query returns empty

2008-07-09 Thread Thomas Markus
hi, have a look at transaction isolation in docs /tm begin:vcard fn:Thomas Markus n:Markus;Thomas org:proventis GmbH adr:;;Zimmerstr. 79-80;Berlin;Berlin;10117;Germany email;internet:[EMAIL PROTECTED] tel;work:+49 30 29 36 399 22 x-mozilla-html:FALSE url:http://www.proventis.net version:2.1 end

Re: [GENERAL] Select Query

2007-01-11 Thread Shane Ambler
Ashish Karalkar wrote: Hello List, I am having list of tables , what I want to do is to filter this list of table for a particular value of its column, the column which i will be searching is common accross all tables in list any clues?? Something like SELECT * FROM ( SELECT col1,co

Re: [GENERAL] select query not using index

2006-12-03 Thread vivek
Yes , that was the case indeed. I disabled seq scan and it used the index. And the cost was higher than seq scan. Thanks a lot for all your replies. With warm regards. Vivek J. Joshi. [EMAIL PROTECTED] Trikon Electronics Pvt. Ltd. All science is either physics or stamp collecting.

Re: [GENERAL] select query not using index

2006-12-02 Thread hubert depesz lubaczewski
On 12/2/06, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote: The index was created before the table was populated. There are 3 rows in the table for 3 different users. Now when I do a postgresql will not use index scan for table with 3 rows in it. it is way faster to use seq scan on it. depesz

Re: [GENERAL] select query not using index

2006-12-02 Thread A. Kretschmer
am Sat, dem 02.12.2006, um 16:35:47 +0530 mailte [EMAIL PROTECTED] folgendes: > > The index was created before the table was populated. There are 3 rows > in the table for 3 different users. Now when I do a In this case, with only 3 rows, it is much cheaper to do a seq-scan instead a index-scan

Re: [GENERAL] select query not using index

2006-12-02 Thread Gregory S. Williamson
Vivek -- If you could let people know what version of postgres, and which OS, it might help. A guess: the planner sees that there are very few rows and decides that a sequential scan is faster (this is because a sequential scan on a table with only a few rows is probably done in one operation;