Thread: How to get the content of Bind variables

How to get the content of Bind variables

From

ROS Didier

Date:

28 February 2019, 15:21:56

In the log file of my PostgreSQL cluster, I find :

Statement: update t_shared_liste_valeurs set deletion_date=$1, deletion_login=$2, modification_date=$3, modification_login=$4, administrable=$5, libelle=$6, niveau=$7 where code=$8

è how to get the content of the bind variables ?

Thanks in advance

Best Regards

cid:image002.png@01D14E0E.8515EB90

Didier ROS

Expertise SGBD

EDF - DTEO - DSIT - IT DMA

Département Solutions Groupe

Groupe Performance Applicative

32 avenue Pablo Picasso

92000 NANTERRE

didier.ros@edf.fr

Tél. : +33 6 49 51 11 88

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Re: How to get the content of Bind variables

From

MichaelDBA

Date:

28 February 2019, 15:36:56

If you set log_min_duration_statement low enough for your particular query, you will see another line below it showing what values are associated with each bind variable like this:

2019-02-28 00:07:55 CST 2019-02-28 00:02:09 CST ihr2 10.86.42.184(43460) SELECT LOG: duration: 26078.308 ms execute <unnamed>: select pg_advisory_lock($1)2019-02-28 00:07:55 CST 2019-02-28 00:02:09 CST ihr2 10.86.42.184(43460) SELECT DETAIL: parameters: $1 = '3428922050323511872'

Regards,
Michael Vitale

ROS Didier
Thursday, February 28, 2019 7:21 AM

Hi
In the log file of my PostgreSQL cluster, I find :
>>
Statement: update t_shared_liste_valeurs set deletion_date=$1, deletion_login=$2, modification_date=$3, modification_login=$4, administrable=$5, libelle=$6, niveau=$7 where code=$8
<<

è how to get the content of the bind variables ?

Thanks in advance

Best Regards

Didier ROS
Expertise SGBD
EDF - DTEO - DSIT - IT DMA
Département Solutions Groupe
Groupe Performance Applicative
32 avenue Pablo Picasso
92000 NANTERRE

didier.ros@edf.fr
Tél. : +33 6 49 51 11 88

Ce message et toutes les pièces jointes (ci-après le 'Message') sont établis à l'intention exclusive des destinataires et les informations qui y figurent sont strictement confidentielles. Toute utilisation de ce Message non conforme à sa destination, toute diffusion ou toute publication totale ou partielle, est interdite sauf autorisation expresse.
Si vous n'êtes pas le destinataire de ce Message, il vous est interdit de le copier, de le faire suivre, de le divulguer ou d'en utiliser tout ou partie. Si vous avez reçu ce Message par erreur, merci de le supprimer de votre système, ainsi que toutes ses copies, et de n'en garder aucune trace sur quelque support que ce soit. Nous vous remercions également d'en avertir immédiatement l'expéditeur par retour du message.
Il est impossible de garantir que les communications par messagerie électronique arrivent en temps utile, sont sécurisées ou dénuées de toute erreur ou virus.
____________________________________________________
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RE: How to get the content of Bind variables

From

ROS Didier

Date:

28 February 2019, 15:47:02

Thanks for the answer.

I have in my postgresql.conf :

log_min_duration_statement=0

and the content of bind variables is not showed in the log file.

What can I do to get the content of the bind variables ?

Best Regard

cid:image002.png@01D14E0E.8515EB90

Didier ROS

Expertise SGBD

EDF - DTEO - DSIT - IT DMA

Département Solutions Groupe

Groupe Performance Applicative

32 avenue Pablo Picasso

92000 NANTERRE

didier.ros@edf.fr

Tél. : +33 6 49 51 11 88

De : MichaelDBA@sqlexec.com [mailto:MichaelDBA@sqlexec.com]
Envoyé : jeudi 28 février 2019 13:37
À : ROS Didier <didier.ros@edf.fr>
Cc : pgsql-performance@postgresql.org
Objet : Re: How to get the content of Bind variables

If you set log_min_duration_statement low enough for your particular query, you will see another line below it showing what values are associated with each bind variable like this:

2019-02-28 00:07:55 CST 2019-02-28 00:02:09 CST ihr2 10.86.42.184(43460) SELECT LOG: duration: 26078.308 ms execute <unnamed>: select pg_advisory_lock($1)

2019-02-28 00:07:55 CST 2019-02-28 00:02:09 CST ihr2 10.86.42.184(43460) SELECT DETAIL: parameters: $1 = '3428922050323511872'

Regards,
Michael Vitale

ROS Didier
Thursday, February 28, 2019 7:21 AM
Hi
In the log file of my PostgreSQL cluster, I find :
>>
Statement: update t_shared_liste_valeurs set deletion_date=$1, deletion_login=$2, modification_date=$3, modification_login=$4, administrable=$5, libelle=$6, niveau=$7 where code=$8
<<

è how to get the content of the bind variables ?

Thanks in advance

Best Regards

Didier ROS
Expertise SGBD
EDF - DTEO - DSIT - IT DMA
Département Solutions Groupe
Groupe Performance Applicative
32 avenue Pablo Picasso
92000 NANTERRE

didier.ros@edf.fr
Tél. : +33 6 49 51 11 88

Ce message et toutes les pièces jointes (ci-après le 'Message') sont établis à l'intention exclusive des destinataires et les informations qui y figurent sont strictement confidentielles. Toute utilisation de ce Message non conforme à sa destination, toute diffusion ou toute publication totale ou partielle, est interdite sauf autorisation expresse.
Si vous n'êtes pas le destinataire de ce Message, il vous est interdit de le copier, de le faire suivre, de le divulguer ou d'en utiliser tout ou partie. Si vous avez reçu ce Message par erreur, merci de le supprimer de votre système, ainsi que toutes ses copies, et de n'en garder aucune trace sur quelque support que ce soit. Nous vous remercions également d'en avertir immédiatement l'expéditeur par retour du message.
Il est impossible de garantir que les communications par messagerie électronique arrivent en temps utile, sont sécurisées ou dénuées de toute erreur ou virus.
____________________________________________________
This message and any attachments (the 'Message') are intended solely for the addressees. The information contained in this Message is confidential. Any use of information contained in this Message not in accord with its purpose, any dissemination or disclosure, either whole or partial, is prohibited except formal approval.
If you are not the addressee, you may not copy, forward, disclose or use any part of it. If you have received this message in error, please delete it and all copies from your system and notify the sender immediately by return message.
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Re: How to get the content of Bind variables

From

Laurenz Albe

Date:

28 February 2019, 19:01:28

ROS Didier wrote:
>                In the log file of my PostgreSQL cluster, I find :
> >> 
> Statement: update t_shared_liste_valeurs set deletion_date=$1, deletion_login=$2, modification_date=$3,
modification_login=$4,administrable=$5, libelle=$6, niveau=$7 where code=$8
 
> << 
>  
> how to get the content of the bind variables ?

Can we see the whole log entry and the following one?

Perhaps there was a syntax error or similar, and the statement was never executed.

Yours,
Laurenz Albe
-- 
Cybertec | https://www.cybertec-postgresql.com

RE: How to get the content of Bind variables

From

ROS Didier

Date:

28 February 2019, 19:12:49

Hi Laurent

Here is a biggest part of my log file :

>>
 2019-02-27 14:41:28 CET [16239]: [5696-1] [10086]
user=pgbd_preint_sg2,db=pgbd_preint_sg2,client=localhost.localdomainLOG: duration: 1.604 ms

2019-02-27 14:41:28 CET [16239]: [5697-1] [10086]
user=pgbd_preint_sg2,db=pgbd_preint_sg2,client=localhost.localdomainLOG: duration: 0.084 ms  parse <unnamed>: update
t_shared_liste_valeursset deletion_date=$1, deletion_login=$2, modification_date=$3, modification_login=$4,
administrable=$5,libelle=$6, niveau=$7 where code=$8

2019-02-27 14:41:28 CET [16239]: [5698-1] [10086]
user=pgbd_preint_sg2,db=pgbd_preint_sg2,client=localhost.localdomainLOG: plan:

2019-02-27 14:41:28 CET [16239]: [5699-1] [10086]
user=pgbd_preint_sg2,db=pgbd_preint_sg2,client=localhost.localdomainSTATEMENT: update t_shared_liste_valeurs set
deletion_date=$1,deletion_login=$2, modification_date=$3, modification_login=$4, administrable=$5, libelle=$6,
niveau=$7where code=$8

2019-02-27 14:41:28 CET [16239]: [5700-1] [10086]
user=pgbd_preint_sg2,db=pgbd_preint_sg2,client=localhost.localdomainLOG: duration: 0.288 ms  bind <unnamed>: update
t_shared_liste_valeursset deletion_date=$1, deletion_login=$2, modification_date=$3, modification_login=$4,
administrable=$5,libelle=$6, niveau=$7 where code=$8

2019-02-27 14:41:28 CET [16239]: [5701-1] [10086]
user=pgbd_preint_sg2,db=pgbd_preint_sg2,client=localhost.localdomainLOG: execute <unnamed>: update
t_shared_liste_valeursset deletion_date=$1, deletion_login=$2, modification_date=$3, modification_login=$4,
administrable=$5,libelle=$6, niveau=$7 where code=$8

<<
The statement has been executed
It is the same problem for all the statements.
I can not get the content of the bind variables.

Didier ROS
Expertise SGBD
EDF - DTEO - DSIT - IT DMA
Département Solutions Groupe
Groupe Performance Applicative
32 avenue Pablo Picasso
92000 NANTERRE

didier.ros@edf.fr
Tél. : +33 6 49 51 11 88

-----Message d'origine-----
De : laurenz.albe@cybertec.at [mailto:laurenz.albe@cybertec.at] 
Envoyé : jeudi 28 février 2019 17:01
À : ROS Didier <didier.ros@edf.fr>; pgsql-performance@postgresql.org
Objet : Re: How to get the content of Bind variables

ROS Didier wrote:
>                In the log file of my PostgreSQL cluster, I find :
> >> 
> Statement: update t_shared_liste_valeurs set deletion_date=$1, 
> deletion_login=$2, modification_date=$3, modification_login=$4, 
> administrable=$5, libelle=$6, niveau=$7 where code=$8 <<
>  
> how to get the content of the bind variables ?

Can we see the whole log entry and the following one?

Perhaps there was a syntax error or similar, and the statement was never executed.

Yours,
Laurenz Albe
--
Cybertec | https://www.cybertec-postgresql.com

Ce message et toutes les pièces jointes (ci-après le 'Message') sont établis à l'intention exclusive des destinataires
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destination,toute diffusion ou toute publication totale ou partielle, est interdite sauf autorisation expresse. 

Si vous n'êtes pas le destinataire de ce Message, il vous est interdit de le copier, de le faire suivre, de le
divulguerou d'en utiliser tout ou partie. Si vous avez reçu ce Message par erreur, merci de le supprimer de votre
système,ainsi que toutes ses copies, et de n'en garder aucune trace sur quelque support que ce soit. Nous vous
remercionségalement d'en avertir immédiatement l'expéditeur par retour du message. 

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Re: How to get the content of Bind variables

From

Justin Pryzby

Date:

28 February 2019, 19:19:00

On Thu, Feb 28, 2019 at 12:21:56PM +0000, ROS Didier wrote:
> Statement: update t_shared_liste_valeurs set deletion_date=$1, deletion_login=$2, modification_date=$3,
modification_login=$4,administrable=$5, libelle=$6, niveau=$7 where code=$8

> 
> è how to get the content of the bind variables ?

What is your setting of log_error_verbosity ?
https://www.postgresql.org/docs/current/runtime-config-logging.html#GUC-LOG-ERROR-VERBOSITY

Also, I recommend using CSV logs, since they're easier to import into the DB
and then easier to parse.
https://www.postgresql.org/docs/current/runtime-config-logging.html#GUC-LOG-ERROR-VERBOSITY

Also, note that you can either set log_min_duration_statement=0, which logs all
statement durations, and associated statements (if they haven't been previously
logged).

Or, you can set log_statement=all, which logs all statements (but duration is
only logged according to log_min_duration_statement).

Justin

RE: How to get the content of Bind variables

From

ROS Didier

Date:

01 March 2019, 10:54:12

Hi
    Here is the information :

postgres=# show log_error_verbosity ;
 log_error_verbosity
---------------------
 default
(1 row)

postgres=# show log_statement ;
 log_statement
---------------
 none
(1 row)

I am trying now to set up log_statement :
log_statement=all ;
log_min_duration_statement=250;

Didier ROS
Expertise SGBD
EDF - DTEO - DSIT - IT DMA
Département Solutions Groupe
Groupe Performance Applicative
32 avenue Pablo Picasso
92000 NANTERRE

didier.ros@edf.fr
Tél. : +33 6 49 51 11 88

-----Message d'origine-----
De : pryzby@telsasoft.com [mailto:pryzby@telsasoft.com]
Envoyé : jeudi 28 février 2019 17:19
À : ROS Didier <didier.ros@edf.fr>
Cc : pgsql-performance@postgresql.org
Objet : Re: How to get the content of Bind variables

On Thu, Feb 28, 2019 at 12:21:56PM +0000, ROS Didier wrote:
> Statement: update t_shared_liste_valeurs set deletion_date=$1,
> deletion_login=$2, modification_date=$3, modification_login=$4,
> administrable=$5, libelle=$6, niveau=$7 where code=$8
>
> è how to get the content of the bind variables ?

What is your setting of log_error_verbosity ?
https://www.postgresql.org/docs/current/runtime-config-logging.html#GUC-LOG-ERROR-VERBOSITY

Also, I recommend using CSV logs, since they're easier to import into the DB and then easier to parse.
https://www.postgresql.org/docs/current/runtime-config-logging.html#GUC-LOG-ERROR-VERBOSITY

Also, note that you can either set log_min_duration_statement=0, which logs all statement durations, and associated
statements(if they haven't been previously logged). 

Or, you can set log_statement=all, which logs all statements (but duration is only logged according to
log_min_duration_statement).

Justin

Ce message et toutes les pièces jointes (ci-après le 'Message') sont établis à l'intention exclusive des destinataires
etles informations qui y figurent sont strictement confidentielles. Toute utilisation de ce Message non conforme à sa
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Il est impossible de garantir que les communications par messagerie électronique arrivent en temps utile, sont
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Re: How to get the content of Bind variables

From

Laurenz Albe

Date:

01 March 2019, 11:31:38

ROS Didier wrote:
> Here is a biggest part of my log file :
> 
>  2019-02-27 14:41:28 CET [16239]: [5696-1] [10086]
user=pgbd_preint_sg2,db=pgbd_preint_sg2,client=localhost.localdomainLOG: duration: 1.604 ms
 
> 2019-02-27 14:41:28 CET [16239]: [5697-1] [10086]
user=pgbd_preint_sg2,db=pgbd_preint_sg2,client=localhost.localdomainLOG: duration: 0.084 ms  parse <unnamed>: update
t_shared_liste_valeursset deletion_date=$1, deletion_login=$2, modification_date=$3, modification_login=$4,
administrable=$5,libelle=$6, niveau=$7 where code=$8
 
> 2019-02-27 14:41:28 CET [16239]: [5698-1] [10086]
user=pgbd_preint_sg2,db=pgbd_preint_sg2,client=localhost.localdomainLOG: plan:
 
> 2019-02-27 14:41:28 CET [16239]: [5699-1] [10086]
user=pgbd_preint_sg2,db=pgbd_preint_sg2,client=localhost.localdomainSTATEMENT: update t_shared_liste_valeurs set
deletion_date=$1,deletion_login=$2, modification_date=$3, modification_login=$4, administrable=$5, libelle=$6,
niveau=$7where code=$8
 
> 2019-02-27 14:41:28 CET [16239]: [5700-1] [10086]
user=pgbd_preint_sg2,db=pgbd_preint_sg2,client=localhost.localdomainLOG: duration: 0.288 ms  bind <unnamed>: update
t_shared_liste_valeursset deletion_date=$1, deletion_login=$2, modification_date=$3, modification_login=$4,
administrable=$5,libelle=$6, niveau=$7 where code=$8
 
> 2019-02-27 14:41:28 CET [16239]: [5701-1] [10086]
user=pgbd_preint_sg2,db=pgbd_preint_sg2,client=localhost.localdomainLOG: execute <unnamed>: update
t_shared_liste_valeursset deletion_date=$1, deletion_login=$2, modification_date=$3, modification_login=$4,
administrable=$5,libelle=$6, niveau=$7 where code=$8
 
> <<
> The statement has been executed
> It is the same problem for all the statements.
> I can not get the content of the bind variables.

You should set "log_error_verbosity" back from "terse" to "default".
Then you will see the DETAIL messages.

Yours,
Laurenz Albe
-- 
Cybertec | https://www.cybertec-postgresql.com

Re: How to get the content of Bind variables

From

Tom Lane

Date:

01 March 2019, 19:29:42

ROS Didier <didier.ros@edf.fr> writes:
> postgres=# show log_error_verbosity ;
>  log_error_verbosity
> ---------------------
>  default
> (1 row)

So ... how old is this server?  AFAIK the above should be enough to ensure
you get the DETAIL lines with parameter values.  But the ability to log
those hasn't been there forever.

            regards, tom lane

RE: How to get the content of Bind variables

From

ROS Didier

Date:

01 March 2019, 21:47:06

Hi Tom

    Thanks a lot for your answer.

*) Here is information about my server :
[postgres@noeyypvd pg_log]$ cat /etc/redhat-release
Red Hat Enterprise Linux Server release 7.3 (Maipo)

postgres=# select version() ;
                                                 version
---------------------------------------------------------------------------------------------------------
 PostgreSQL 10.2 on x86_64-pc-linux-gnu, compiled by gcc (GCC) 4.8.5 20150623 (Red Hat 4.8.5-16), 64-bit
(1 row)

  *)  it's very problematic that we can not get the content of bind variables. We can not determine the root query
whichmakes UPDATE statements to crash our production database. 
What can explain the lack of information about bind variables?

*) Here is the parameters setting I use :
# postgresql.conf : include_if_exists = '/appli/postgres/pgbd_prod_pda/10/conf/audit.conf'

log_rotation_size = 0
log_destination=stderr
logging_collector=true
client_min_messages=notice
log_min_messages=ERROR
log_min_error_statement=ERROR
log_min_duration_statement=250
debug_print_parse=off
debug_print_rewritten=off
debug_print_plan=on
debug_pretty_print=on
log_checkpoints=on
log_connections=on
log_disconnections=on
log_duration=on
log_error_verbosity=VERBOSE
log_hostname=on
log_lock_waits=on
deadlock_timeout=1s
log_statement=all
log_temp_files=0
log_autovacuum_min_duration = 0
track_activities=on
track_io_timing=on
track_functions=all
log_line_prefix = '%t [%p]: [%l-1] [%x] user=%u,db=%d,client=%h'
lc_messages ='C'
shared_preload_libraries = 'passwordcheck,pg_stat_statements,pgstattuple'
listen_addresses = '*'
pg_stat_statements.track=all
pg_stat_statements.max = 1000
pg_stat_statements.track_utility=on
pg_stat_statements.save=on

*) -> suggestion : It would be nice to have the content of bind variable of a query in a table of  pg_catalog. (cf
ORACLE) 

Didier ROS
Expertise SGBD
EDF - DTEO - DSIT - IT DMA
Département Solutions Groupe
Groupe Performance Applicative
32 avenue Pablo Picasso
92000 NANTERRE

didier.ros@edf.fr
Tél. : +33 6 49 51 11 88

-----Message d'origine-----
De : tgl@sss.pgh.pa.us [mailto:tgl@sss.pgh.pa.us]
Envoyé : vendredi 1 mars 2019 17:30
À : ROS Didier <didier.ros@edf.fr>
Cc : pryzby@telsasoft.com; pgsql-performance@postgresql.org
Objet : Re: How to get the content of Bind variables

ROS Didier <didier.ros@edf.fr> writes:
> postgres=# show log_error_verbosity ;
>  log_error_verbosity
> ---------------------
>  default
> (1 row)

So ... how old is this server?  AFAIK the above should be enough to ensure you get the DETAIL lines with parameter
values. But the ability to log those hasn't been there forever. 

            regards, tom lane

Ce message et toutes les pièces jointes (ci-après le 'Message') sont établis à l'intention exclusive des destinataires
etles informations qui y figurent sont strictement confidentielles. Toute utilisation de ce Message non conforme à sa
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Si vous n'êtes pas le destinataire de ce Message, il vous est interdit de le copier, de le faire suivre, de le
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système,ainsi que toutes ses copies, et de n'en garder aucune trace sur quelque support que ce soit. Nous vous
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Il est impossible de garantir que les communications par messagerie électronique arrivent en temps utile, sont
sécuriséesou dénuées de toute erreur ou virus. 
____________________________________________________

This message and any attachments (the 'Message') are intended solely for the addressees. The information contained in
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disseminationor disclosure, either whole or partial, is prohibited except formal approval. 

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RE: How to get the content of Bind variables

From

legrand legrand

Date:

01 March 2019, 23:41:38

Hi Didier,

I imagine that this is the sql executed from a trigger.
Could you provide the trigger pl/pgsql code ? 
as the source and target tables (anonymized) definition ?

After a fresh db restart, are thoses logs the same for the 6 first
executions and the following ones ?

Regards
PAscal 



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RE: How to get the content of Bind variables

From

ROS Didier

Date:

02 March 2019, 16:14:44

The SQL is not executed from a trigger.

Here is an extract of my log file :

2019-03-01 14:53:37 CET [24803]: [129-1] [3686] user=pgbd_preint_sg2,db=pgbd_preint_sg2 LOG: process 24803 still waiting for ShareLock on transaction 3711 after 1000.476 ms

2019-03-01 14:53:37 CET [24803]: [130-1] [3686] user=pgbd_preint_sg2,db=pgbd_preint_sg2 DETAIL: Process holding the lock: 24786. Wait queue: 24803.

2019-03-01 14:53:37 CET [24803]: [131-1] [3686] user=pgbd_preint_sg2,db=pgbd_preint_sg2 CONTEXT: while rechecking updated tuple (3,33) in relation "t_shared_liste_valeurs"

2019-03-01 14:53:37 CET [24803]: [132-1] [3686] user=pgbd_preint_sg2,db=pgbd_preint_sg2 STATEMENT: update t_shared_liste_valeurs set deletion_date=$1, deletion_login=$2, modification_date=$3, modification_login=$4, administrable=$5, libelle=$6, niveau=$7 where code=$8

After a fresh db restart, the result is the same : no content of Bind variables in the log file.

Best Regards cid:image002.png@01D14E0E.8515EB90

Didier ROS

Expertise SGBD

EDF - DTEO - DSIT - IT DMA

Département Solutions Groupe

Groupe Performance Applicative

32 avenue Pablo Picasso

92000 NANTERRE

didier.ros@edf.fr

Tél. : +33 6 49 51 11 88

-----Message d'origine-----
De : legrand_legrand@hotmail.com [mailto:legrand_legrand@hotmail.com]
Envoyé : vendredi 1 mars 2019 21:42
À : pgsql-performance@postgresql.org
Objet : RE: How to get the content of Bind variables

Hi Didier,

I imagine that this is the sql executed from a trigger.

Could you provide the trigger pl/pgsql code ?

as the source and target tables (anonymized) definition ?

After a fresh db restart, are thoses logs the same for the 6 first executions and the following ones ?

Regards

PAscal

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Attachment

RE: How to get the content of Bind variables

From

legrand legrand

Date:

02 March 2019, 17:10:11

Did16 wrote
> Hi
>                The SQL is not executed from a trigger.
>                Here is an extract of my log file :
>>>
>
> 2019-03-01 14:53:37 CET [24803]: [129-1] [3686]
> user=pgbd_preint_sg2,db=pgbd_preint_sg2 LOG:  process 24803 still waiting
> for ShareLock on transaction 3711 after 1000.476 ms
>
> 2019-03-01 14:53:37 CET [24803]: [130-1] [3686]
> user=pgbd_preint_sg2,db=pgbd_preint_sg2 DETAIL:  Process holding the lock:
> 24786. Wait queue: 24803.
>
> 2019-03-01 14:53:37 CET [24803]: [131-1] [3686]
> user=pgbd_preint_sg2,db=pgbd_preint_sg2 CONTEXT:  while rechecking updated
> tuple (3,33) in relation "t_shared_liste_valeurs"
>
> 2019-03-01 14:53:37 CET [24803]: [132-1] [3686]
> user=pgbd_preint_sg2,db=pgbd_preint_sg2 STATEMENT:  update
> t_shared_liste_valeurs set deletion_date=$1, deletion_login=$2,
> modification_date=$3, modification_login=$4, administrable=$5, libelle=$6,
> niveau=$7 where code=$8
>
> <<
>
> After a fresh db restart, the result is the same : no content of Bind
> variables in the log file.
>
> Best Regards
>
> Didier ROS
> Expertise SGBD
> EDF - DTEO - DSIT - IT DMA
> Département Solutions Groupe
> Groupe Performance Applicative
> 32 avenue Pablo Picasso
> 92000 NANTERRE

OK, In case of a trigger or any pl/pgsql program I would have tryed to write
the content of bind variables using RAISE command or someting similar before
executing the UPDATE command.

But your log is now much more explicit: you where waiting on a LOCK ...

Regards
PAscal



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Re: How to get the content of Bind variables

From

Justin Pryzby

Date:

02 March 2019, 18:56:38

On Fri, Mar 01, 2019 at 06:47:06PM +0000, ROS Didier wrote:
> log_line_prefix = '%t [%p]: [%l-1] [%x] user=%u,db=%d,client=%h'

On Sat, Mar 02, 2019 at 01:14:44PM +0000, ROS Didier wrote:
> 2019-03-01 14:53:37 CET [24803]: [129-1] [3686] user=pgbd_preint_sg2,db=pgbd_preint_sg2 LOG:  process 24803 still
waitingfor ShareLock on transaction 3711 after 1000.476 ms

> 2019-03-01 14:53:37 CET [24803]: [130-1] [3686] user=pgbd_preint_sg2,db=pgbd_preint_sg2 DETAIL:  Process holding the
lock:24786. Wait queue: 24803.

> 2019-03-01 14:53:37 CET [24803]: [131-1] [3686] user=pgbd_preint_sg2,db=pgbd_preint_sg2 CONTEXT:  while rechecking
updatedtuple (3,33) in relation "t_shared_liste_valeurs"

> 2019-03-01 14:53:37 CET [24803]: [132-1] [3686] user=pgbd_preint_sg2,db=pgbd_preint_sg2 STATEMENT:  update
t_shared_liste_valeursset deletion_date=$1, deletion_login=$2, modification_date=$3, modification_login=$4,
administrable=$5,libelle=$6, niveau=$7 where code=$8

I just realized that your log is showing "STATEMENT:  [...]" which I think
means that's using libpq PQexec (simple query protocol), which means it doesn't
use or support bind parameters at all.  If it were using PQexecParams (protocol
2.0 "extended" query), it would show "execute <unnamed>: [...]", with any bind
params in DETAIL.  And if you were using PQexecPrepared, it'd show "execute
FOO: [...]" where FOO is the name of the statement "prepared" by PQprepare
(plus bind params).

https://www.postgresql.org/docs/current/libpq-exec.html
https://www.postgresql.org/docs/current/protocol.html

What client application is this ?  It looks like it's going to set
deletion_date to the literal string "$1" .. except that it's not quoted, so the
statement will just cause an error.  Am I wrong ?

Could you grep the entire logfile for pid 24803 and post the output on dropbox
or pastebin or show 10 lines of context by email ?

I've just used my messages and test cases on this patch as a reference to check
what I wrote above is accurate.
https://www.postgresql.org/message-id/flat/20190210015707.GQ31721%40telsasoft.com#037d17567f4c84a5f436960ef1ed8c49

On Fri, Mar 01, 2019 at 06:47:06PM +0000, ROS Didier wrote:
> *) -> suggestion : It would be nice to have the content of bind variable of a query in a table of pg_catalog. (cf
ORACLE)

As I mentioned, you can set log_destination=csvlog,stderr and import them with
COPY (and add indices and analysis and monitoring..).  It look like DETAILs are
being logged, so that's not the issue, but CSV also has the nice benefit of
being easily imported to SQL where escaping and linebreaks and similar are not
confusing the issue, which I think can be the case for text logs.

Justin

Re: How to get the content of Bind variables

From

Tom Lane

Date:

02 March 2019, 19:33:19

Justin Pryzby <pryzby@telsasoft.com> writes:
> On Fri, Mar 01, 2019 at 06:47:06PM +0000, ROS Didier wrote:
>> log_line_prefix = '%t [%p]: [%l-1] [%x] user=%u,db=%d,client=%h'

> On Sat, Mar 02, 2019 at 01:14:44PM +0000, ROS Didier wrote:
>> 2019-03-01 14:53:37 CET [24803]: [129-1] [3686] user=pgbd_preint_sg2,db=pgbd_preint_sg2 LOG:  process 24803 still
waitingfor ShareLock on transaction 3711 after 1000.476 ms 
>> 2019-03-01 14:53:37 CET [24803]: [130-1] [3686] user=pgbd_preint_sg2,db=pgbd_preint_sg2 DETAIL:  Process holding the
lock:24786. Wait queue: 24803. 
>> 2019-03-01 14:53:37 CET [24803]: [131-1] [3686] user=pgbd_preint_sg2,db=pgbd_preint_sg2 CONTEXT:  while rechecking
updatedtuple (3,33) in relation "t_shared_liste_valeurs" 
>> 2019-03-01 14:53:37 CET [24803]: [132-1] [3686] user=pgbd_preint_sg2,db=pgbd_preint_sg2 STATEMENT:  update
t_shared_liste_valeursset deletion_date=$1, deletion_login=$2, modification_date=$3, modification_login=$4,
administrable=$5,libelle=$6, niveau=$7 where code=$8 

> I just realized that your log is showing "STATEMENT:  [...]" which I think
> means that's using libpq PQexec (simple query protocol), which means it doesn't
> use or support bind parameters at all.

No, what's shown above is a case of the current statement being printed
as detail for some log message (a log_lock_waits message in this case).
This has nothing to do with whether statement logging is on overall.

I now realize that what the OP is probably wishing for is that bind
parameter values would be included as a detail line in messages other
than log_all_statements or statement-duration messages.  Sorry, that
feature doesn't exist, and there'd be pretty serious technical
impediments to making it happen.

            regards, tom lane

Re: How to get the content of Bind variables

From

Sergei Kornilov

Date:

02 March 2019, 19:33:40

Hello

Postgresql does not log statement parameters on log_lock_wait. Because this is not implemented:
https://github.com/postgres/postgres/blob/REL_10_STABLE/src/backend/storage/lmgr/proc.c#L1461
Compare with errdetail_params routine in this file:
https://github.com/postgres/postgres/blob/REL_10_STABLE/src/backend/tcop/postgres.c#L1847
 

Currently query parameters can be logged only at the end of successful query execution.

regards, Sergei

RE: How to get the content of Bind variables

From

ROS Didier

Date:

02 March 2019, 22:14:41

Hi

I have executed grep command on the entire logfile for pid 24803. See the attached file
NB : I have no DETAIL section in my entire log file. Is it normal ?

Best Reagrds

Didier ROS

-----Message d'origine-----
De : pryzby@telsasoft.com [mailto:pryzby@telsasoft.com]
Envoyé : samedi 2 mars 2019 16:57
À : ROS Didier <didier.ros@edf.fr>
Cc : tgl@sss.pgh.pa.us; pgsql-performance@postgresql.org; legrand_legrand@hotmail.com
Objet : Re: How to get the content of Bind variables

On Fri, Mar 01, 2019 at 06:47:06PM +0000, ROS Didier wrote:
> log_line_prefix = '%t [%p]: [%l-1] [%x] user=%u,db=%d,client=%h'

On Sat, Mar 02, 2019 at 01:14:44PM +0000, ROS Didier wrote:
> 2019-03-01 14:53:37 CET [24803]: [129-1] [3686]
> user=pgbd_preint_sg2,db=pgbd_preint_sg2 LOG:  process 24803 still
> waiting for ShareLock on transaction 3711 after 1000.476 ms
> 2019-03-01 14:53:37 CET [24803]: [130-1] [3686] user=pgbd_preint_sg2,db=pgbd_preint_sg2 DETAIL:  Process holding the
lock:24786. Wait queue: 24803. 
> 2019-03-01 14:53:37 CET [24803]: [131-1] [3686] user=pgbd_preint_sg2,db=pgbd_preint_sg2 CONTEXT:  while rechecking
updatedtuple (3,33) in relation "t_shared_liste_valeurs" 
> 2019-03-01 14:53:37 CET [24803]: [132-1] [3686]
> user=pgbd_preint_sg2,db=pgbd_preint_sg2 STATEMENT:  update
> t_shared_liste_valeurs set deletion_date=$1, deletion_login=$2,
> modification_date=$3, modification_login=$4, administrable=$5,
> libelle=$6, niveau=$7 where code=$8

I just realized that your log is showing "STATEMENT:  [...]" which I think means that's using libpq PQexec (simple
queryprotocol), which means it doesn't use or support bind parameters at all.  If it were using PQexecParams (protocol 
2.0 "extended" query), it would show "execute <unnamed>: [...]", with any bind params in DETAIL.  And if you were using
PQexecPrepared,it'd show "execute 
FOO: [...]" where FOO is the name of the statement "prepared" by PQprepare (plus bind params).

https://www.postgresql.org/docs/current/libpq-exec.html
https://www.postgresql.org/docs/current/protocol.html

What client application is this ?  It looks like it's going to set deletion_date to the literal string "$1" .. except
thatit's not quoted, so the statement will just cause an error.  Am I wrong ? 

Could you grep the entire logfile for pid 24803 and post the output on dropbox or pastebin or show 10 lines of context
byemail ? 

I've just used my messages and test cases on this patch as a reference to check what I wrote above is accurate.
https://www.postgresql.org/message-id/flat/20190210015707.GQ31721%40telsasoft.com#037d17567f4c84a5f436960ef1ed8c49

On Fri, Mar 01, 2019 at 06:47:06PM +0000, ROS Didier wrote:
> *) -> suggestion : It would be nice to have the content of bind
> variable of a query in a table of pg_catalog. (cf ORACLE)

As I mentioned, you can set log_destination=csvlog,stderr and import them with COPY (and add indices and analysis and
monitoring..). It look like DETAILs are being logged, so that's not the issue, but CSV also has the nice benefit of
beingeasily imported to SQL where escaping and linebreaks and similar are not confusing the issue, which I think can be
thecase for text logs. 

Justin

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Attachment

log_tirs_perf.txt

RE: How to get the content of Bind variables

From

ROS Didier

Date:

02 March 2019, 22:19:15

Hi Sergei

Thank you for your explanation. I can understand for the lock wait message, but I have no DETAIL section in my
entirelog file. Why ?
I have plenty of STATEMENT sections ...

Thanks in advance

Best Regards
Didier ROS

-----Message d'origine-----
De : sk@zsrv.org [mailto:sk@zsrv.org]
Envoyé : samedi 2 mars 2019 17:34
À : ROS Didier <didier.ros@edf.fr>; legrand_legrand@hotmail.com; pgsql-performance@postgresql.org
Objet : Re: How to get the content of Bind variables

Hello

Postgresql does not log statement parameters on log_lock_wait. Because this is not implemented:
https://github.com/postgres/postgres/blob/REL_10_STABLE/src/backend/storage/lmgr/proc.c#L1461
Compare with errdetail_params routine in this file:
https://github.com/postgres/postgres/blob/REL_10_STABLE/src/backend/tcop/postgres.c#L1847

Currently query parameters can be logged only at the end of successful query execution.

regards, Sergei

Ce message et toutes les pièces jointes (ci-après le 'Message') sont établis à l'intention exclusive des destinataires
etles informations qui y figurent sont strictement confidentielles. Toute utilisation de ce Message non conforme à sa
destination,toute diffusion ou toute publication totale ou partielle, est interdite sauf autorisation expresse.

Si vous n'êtes pas le destinataire de ce Message, il vous est interdit de le copier, de le faire suivre, de le
divulguerou d'en utiliser tout ou partie. Si vous avez reçu ce Message par erreur, merci de le supprimer de votre
système,ainsi que toutes ses copies, et de n'en garder aucune trace sur quelque support que ce soit. Nous vous
remercionségalement d'en avertir immédiatement l'expéditeur par retour du message.

Il est impossible de garantir que les communications par messagerie électronique arrivent en temps utile, sont
sécuriséesou dénuées de toute erreur ou virus.
____________________________________________________

This message and any attachments (the 'Message') are intended solely for the addressees. The information contained in
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If you are not the addressee, you may not copy, forward, disclose or use any part of it. If you have received this
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