Re: [HACKERS] Todo item: Support amgettuple() in GIN

2013-11-29 Thread Andreas Karlsson
On 11/29/2013 06:13 PM, Tom Lane wrote: Note that Robert's proposed solution is no solution, because it just puts you right back in the bind of needing guaranteed non-lossy storage of a TID set that might be too big to fit in memory. The solution should work if we could guarantee that a TIDBitm

Re: [HACKERS] Todo item: Support amgettuple() in GIN

2013-11-29 Thread Heikki Linnakangas
On 11/29/2013 07:13 PM, Tom Lane wrote: Andreas Karlsson writes: I decided to look into how much work implementing the todo item about supporting amgettuple in GIN would be, since exclusion constraints on GIN would be neat. Robert Haas suggested a solution[1], but to fix it we also need to look

Re: [HACKERS] Todo item: Support amgettuple() in GIN

2013-11-29 Thread Tom Lane
Andreas Karlsson writes: > I decided to look into how much work implementing the todo item about > supporting amgettuple in GIN would be, since exclusion constraints on > GIN would be neat. Robert Haas suggested a solution[1], but to fix it we > also need to look into why the commit message men

Re: [HACKERS] Todo item: Support amgettuple() in GIN

2013-11-29 Thread Antonin Houska
On 11/29/2013 01:57 PM, Andreas Karlsson wrote: > On 11/29/2013 09:54 AM, Antonin Houska wrote: >> On 11/29/2013 01:13 AM, Andreas Karlsson wrote: >> >>> When doing partial matching the code need to be able to return the union >>> of all TIDs in all the matching posting trees in TID order (to be ab

Re: [HACKERS] Todo item: Support amgettuple() in GIN

2013-11-29 Thread Andreas Karlsson
On 11/29/2013 09:54 AM, Antonin Houska wrote: On 11/29/2013 01:13 AM, Andreas Karlsson wrote: When doing partial matching the code need to be able to return the union of all TIDs in all the matching posting trees in TID order (to be able to do AND and OR operations with multiple search keys lat

Re: [HACKERS] Todo item: Support amgettuple() in GIN

2013-11-29 Thread Antonin Houska
On 11/29/2013 01:13 AM, Andreas Karlsson wrote: > When doing partial matching the code need to be able to return the union > of all TIDs in all the matching posting trees in TID order (to be able > to do AND and OR operations with multiple search keys later). It does > this by traversing them p

[HACKERS] Todo item: Support amgettuple() in GIN

2013-11-28 Thread Andreas Karlsson
Hi, I decided to look into how much work implementing the todo item about supporting amgettuple in GIN would be, since exclusion constraints on GIN would be neat. Robert Haas suggested a solution[1], but to fix it we also need to look into why the commit message mentions that it did not work