Re: [HACKERS] Using indexes for partial index builds

2013-05-26 Thread Jim Nasby
On 3/13/13 7:10 PM, Ants Aasma wrote: On Thu, Mar 14, 2013 at 1:51 AM, Jim Nasby wrote: On 3/12/13 9:10 AM, Ants Aasma wrote: I have a feeling this is an increasingly widespread pattern with a proliferation of mobile devices that need syncing. If you're doing that with timestamps you're aski

Re: [HACKERS] Using indexes for partial index builds

2013-03-13 Thread Ants Aasma
On Thu, Mar 14, 2013 at 1:51 AM, Jim Nasby wrote: > On 3/12/13 9:10 AM, Ants Aasma wrote: >> I have a feeling this is an increasingly widespread pattern with a >> proliferation of mobile devices that need syncing. > > If you're doing that with timestamps you're asking for a slew of problems, > not

Re: [HACKERS] Using indexes for partial index builds

2013-03-13 Thread Jim Nasby
On 3/12/13 9:10 AM, Ants Aasma wrote: I have a feeling this is an increasingly widespread pattern with a proliferation of mobile devices that need syncing. If you're doing that with timestamps you're asking for a slew of problems, not all of which can be solved by just adding some random amoun

Re: [HACKERS] Using indexes for partial index builds

2013-03-12 Thread Ants Aasma
On Mon, Mar 11, 2013 at 9:13 PM, Greg Stark wrote: > On Thu, Mar 7, 2013 at 12:51 AM, Jim Nasby wrote: >> Something worth considering on this... I suspect it's possible to use an >> index-only scan to do this, regardless of whether the heap page is all >> visible. The reason is that the newly cre

Re: [HACKERS] Using indexes for partial index builds

2013-03-11 Thread Greg Stark
On Thu, Mar 7, 2013 at 12:51 AM, Jim Nasby wrote: > Something worth considering on this... I suspect it's possible to use an > index-only scan to do this, regardless of whether the heap page is all > visible. The reason is that the newly created index would just use the same > access methodology a

Re: [HACKERS] Using indexes for partial index builds

2013-03-06 Thread Jim Nasby
On 2/2/13 4:05 AM, Paul Norman wrote: Hello, After a discussion on IRC in #postgresql, I had a feature suggestion and it was suggested I write it up here. I have a large (200GB, 1.7b rows) table with a number of columns, but the two of interest here are a hstore column, tags and a postgis geomet

[HACKERS] Using indexes for partial index builds

2013-02-02 Thread Paul Norman
Hello, After a discussion on IRC in #postgresql, I had a feature suggestion and it was suggested I write it up here. I have a large (200GB, 1.7b rows) table with a number of columns, but the two of interest here are a hstore column, tags and a postgis geometry column, geom. There is a GIN index