Обсуждение: BUG #6685: Concurrency fault in create table
The following bug has been logged on the website: Bug reference: 6685 Logged by: Mark Thornton Email address: mthornton@optrak.com PostgreSQL version: 9.1.4 Operating system: Ubuntu 12.04 Description:=20=20=20=20=20=20=20=20 Executing create table child_a () inherits (parent) create table child_b () inherits (parent) concurrently (two separate connections) results in an error "concurrent tuple update". Postgres should be responsible for serializing updates to the shared resource (whatever it is).
On 06/10/2012 06:25 PM, mthornton@optrak.com wrote: > The following bug has been logged on the website: > > Bug reference: 6685 > Logged by: Mark Thornton > Email address: mthornton@optrak.com > PostgreSQL version: 9.1.4 > Operating system: Ubuntu 12.04 > Description: > > Executing > create table child_a () inherits (parent) > create table child_b () inherits (parent) > > concurrently (two separate connections) results in an error "concurrent > tuple update". Please copy and paste the full error message. Which application are you using? psql directly? Something else? -- Craig Ringer
mthornton@optrak.com writes: > The following bug has been logged on the website: > Bug reference: 6685 > Logged by: Mark Thornton > Email address: mthornton@optrak.com > PostgreSQL version: 9.1.4 > Operating system: Ubuntu 12.04 > Description: > Executing > create table child_a () inherits (parent) > create table child_b () inherits (parent) > concurrently (two separate connections) results in an error "concurrent > tuple update". You sure that's a 9.1 server? I can reproduce such an error in older releases, but not 9.1. I believe the relevant fix is http://git.postgresql.org/gitweb/?p=postgresql.git&a=commitdiff&h=fbcf4b92aa64d4577bcf25925b055316b978744a As noted there, the change wasn't back-patched for fear that the stronger lock on the parent table might be an undesirable behavioral change for some applications. regards, tom lane
On 10/06/12 22:08, Tom Lane wrote: > mthornton@optrak.com writes: >> The following bug has been logged on the website: >> Bug reference: 6685 >> Logged by: Mark Thornton >> Email address: mthornton@optrak.com >> PostgreSQL version: 9.1.4 >> Operating system: Ubuntu 12.04 >> Description: >> Executing >> create table child_a () inherits (parent) >> create table child_b () inherits (parent) >> concurrently (two separate connections) results in an error "concurrent >> tuple update". > You sure that's a 9.1 server? I can reproduce such an error in older > releases, but not 9.1. Ah, now I come to think of it, I do have more than one version here. I'll recheck which one shows the problem. Mark