D.gnu - Vectorization vs. sql

=?iso-8859-1?q?Knud_S=F8rensen?= <knud NetRunner.all-technology.com> writes:
```I think vectorization is very similar to sql.

Take matrix multiplication in sql.

select a.index1,b.index2, sum(a.value*b.value) into c (index1,index2,value)
from a,b where a.index2=b.index1 group by a.index1,b.index2;

So, maybe we can make a similar notation for vectorization in D.

Something like:

vectorize sum(a[i,j]*b[j,k]) into c[i,k] over i=1..l,j=1..m,k=1..n;

Just an idea.

Knud
```
Feb 15 2005
=?iso-8859-1?q?Knud_S=F8rensen?= <knud NetRunner.all-technology.com> writes:
```On second thought one might need to seperate free from non free indexes.

vectorize sum(a[i,j]*b[j,k]) into c[i,k] with i=1..l,k=1..n over j=1..m;

On Wed, 16 Feb 2005 02:07:41 +0100, Knud Sørensen wrote:

I think vectorization is very similar to sql.

Take matrix multiplication in sql.

select a.index1,b.index2, sum(a.value*b.value) into c (index1,index2,value)
from a,b where a.index2=b.index1 group by a.index1,b.index2;

So, maybe we can make a similar notation for vectorization in D.

Something like:

vectorize sum(a[i,j]*b[j,k]) into c[i,k] over i=1..l,j=1..m,k=1..n;

Just an idea.

Knud

```
Feb 16 2005