Re: [HACKERS] Does people favor to have matrix data type?

> -Original Message- > From: Jim Nasby [mailto:jim.na...@bluetreble.com] > Sent: Wednesday, June 01, 2016 11:32 PM > To: Kaigai Kouhei(海外 浩平); Gavin Flower; Joe Conway; Ants Aasma; Simon Riggs > Cc: pgsql-hackers@postgresql.org > Subject: Re: [HACKERS] Does people favor t

Re: [HACKERS] Does people favor to have matrix data type?

On 5/30/16 9:05 PM, Kouhei Kaigai wrote: Due to performance reason, location of each element must be deterministic without walking on the data structure. This approach guarantees we can reach individual element with 2 steps. Agreed. On various other points... Yes, please keep the discussion

Re: [HACKERS] Does people favor to have matrix data type?

> -Original Message- > From: Gavin Flower [mailto:gavinflo...@archidevsys.co.nz] > Sent: Tuesday, May 31, 2016 9:47 AM > To: Kaigai Kouhei(海外 浩平); Joe Conway; Jim Nasby; Ants Aasma; Simon Riggs > Cc: pgsql-hackers@postgresql.org > Subject: Re: [HACKERS] Does people fa

Re: [HACKERS] Does people favor to have matrix data type?

On 31/05/16 12:01, Kouhei Kaigai wrote: On 05/29/2016 04:55 PM, Kouhei Kaigai wrote: For the closer integration, it may be valuable if PL/R and PL/CUDA can exchange the data structure with no serialization/de-serialization when PL/R code tries to call SQL functions. I had been thinking about

Re: [HACKERS] Does people favor to have matrix data type?

> On 05/29/2016 04:55 PM, Kouhei Kaigai wrote: > > For the closer integration, it may be valuable if PL/R and PL/CUDA can > > exchange > > the data structure with no serialization/de-serialization when PL/R code > > tries > > to call SQL functions. > > I had been thinking about something

Re: [HACKERS] Does people favor to have matrix data type?

On 05/29/2016 04:55 PM, Kouhei Kaigai wrote: > For the closer integration, it may be valuable if PL/R and PL/CUDA can > exchange > the data structure with no serialization/de-serialization when PL/R code tries > to call SQL functions. I had been thinking about something similar. Maybe PL/R can

Re: [HACKERS] Does people favor to have matrix data type?

c: pgsql-hackers@postgresql.org > >> Subject: Re: [HACKERS] Does people favor to have matrix data type? > >> > >> On 05/28/2016 07:12 AM, Kouhei Kaigai wrote: > >>> Sparse matrix! It is a disadvantaged area for the current array format. > >>> > >&

Re: [HACKERS] Does people favor to have matrix data type?

; Subject: Re: [HACKERS] Does people favor to have matrix data type? >> >> On 05/28/2016 07:12 AM, Kouhei Kaigai wrote: >>> Sparse matrix! It is a disadvantaged area for the current array format. >>> >>> I have two ideas. HPC folks often split a larg

Re: [HACKERS] Does people favor to have matrix data type?

> -Original Message- > From: Joe Conway [mailto:m...@joeconway.com] > Sent: Sunday, May 29, 2016 1:40 AM > To: Kaigai Kouhei(海外 浩平); Jim Nasby; Ants Aasma; Simon Riggs > Cc: pgsql-hackers@postgresql.org > Subject: Re: [HACKERS] Does people favor to have matrix data type?

Re: [HACKERS] Does people favor to have matrix data type?

On 05/28/2016 07:12 AM, Kouhei Kaigai wrote: > Sparse matrix! It is a disadvantaged area for the current array format. > > I have two ideas. HPC folks often split a large matrix into multiple > grid. A grid is typically up to 1024x1024 matrix, for example. > If a grid is consists of all zero

Re: [HACKERS] Does people favor to have matrix data type?

> On 5/25/16 7:46 AM, Kouhei Kaigai wrote: > > My only concern is that domain type is not allowed to define type cast. > > If we could add type cast on domain, we can define type transformation from > > other array type to matrix. > > I've actually wished for that in the past, as well as casting

Re: [HACKERS] Does people favor to have matrix data type?

On 5/25/16 7:46 AM, Kouhei Kaigai wrote: My only concern is that domain type is not allowed to define type cast. If we could add type cast on domain, we can define type transformation from other array type to matrix. I've actually wished for that in the past, as well as casting to compound

Re: [HACKERS] Does people favor to have matrix data type?

Kouhei Kaigai writes: > The 'matrix' data type as domain type of real[] is an option to implement. > We can define operators on the domain types, thus, it allows us to process > large amount of calculation by one operation, in native binary speed. Don't go that way, it will

Re: [HACKERS] Does people favor to have matrix data type?

; Subject: Re: [HACKERS] Does people favor to have matrix data type? > > > > On 25 May 2016 at 03:52, Kouhei Kaigai <kai...@ak.jp.nec.com> wrote: > > > > > > In a few days, I'm working for a data type that represents matrix in > > mathematical a

Re: [HACKERS] Does people favor to have matrix data type?

> On Wed, May 25, 2016 at 10:38 AM, Simon Riggs wrote: > > On 25 May 2016 at 03:52, Kouhei Kaigai wrote: > >> > >> In a few days, I'm working for a data type that represents matrix in > >> mathematical area. Does people favor to have this data type in

Re: [HACKERS] Does people favor to have matrix data type?

> -Original Message- > From: Simon Riggs [mailto:si...@2ndquadrant.com] > Sent: Wednesday, May 25, 2016 4:39 PM > To: Kaigai Kouhei(海外 浩平) > Cc: pgsql-hackers@postgresql.org > Subject: Re: [HACKERS] Does people favor to have matrix data type? > > On 25 May 2016

Re: [HACKERS] Does people favor to have matrix data type?

On Wed, May 25, 2016 at 10:38 AM, Simon Riggs wrote: > On 25 May 2016 at 03:52, Kouhei Kaigai wrote: >> >> In a few days, I'm working for a data type that represents matrix in >> mathematical area. Does people favor to have this data type in the core,

Re: [HACKERS] Does people favor to have matrix data type?

On 25 May 2016 at 03:52, Kouhei Kaigai wrote: > In a few days, I'm working for a data type that represents matrix in > mathematical area. Does people favor to have this data type in the core, > not only my extension? > If we understood the use case, it might help

Re: [HACKERS] Does people favor to have matrix data type?

Hi 2016-05-25 4:52 GMT+02:00 Kouhei Kaigai : > In a few days, I'm working for a data type that represents matrix in > mathematical area. Does people favor to have this data type in the core, > not only my extension? > > Like oidvector or int2vector, it is one of array type