Sorry, it's just called hashJoin Joel Bernstein http://joelsolr.blogspot.com/
On Wed, May 3, 2017 at 2:45 AM, Zheng Lin Edwin Yeo <edwinye...@gmail.com> wrote: > Hi Joel, > > I am getting this error when I used the innerHashJoin. > > "EXCEPTION":"Invalid stream expression innerHashJoin(parallel(innerJoin > > I also can't find the documentation on innerHashJoin for the Streaming > Expressions. > > Are you referring to hashJoin? > > Regards, > Edwin > > > On 3 May 2017 at 13:20, Zheng Lin Edwin Yeo <edwinye...@gmail.com> wrote: > > > Hi Joel, > > > > Thanks for the info. > > > > Regards, > > Edwin > > > > > > On 3 May 2017 at 02:04, Joel Bernstein <joels...@gmail.com> wrote: > > > >> Also take a look at the documentation for the "fetch" streaming > >> expression. > >> > >> Joel Bernstein > >> http://joelsolr.blogspot.com/ > >> > >> On Tue, May 2, 2017 at 2:03 PM, Joel Bernstein <joels...@gmail.com> > >> wrote: > >> > >> > Yes you join more then one collection with Streaming Expressions. Here > >> are > >> > a few things to keep in mind. > >> > > >> > * You'll likely want to use the parallel function around the largest > >> join. > >> > You'll need to use the join keys as the partitionKeys. > >> > * innerJoin: requires that the streams be sorted on the join keys. > >> > * innerHashJoin: has no sorting requirement. > >> > > >> > So a strategy for a three collection join might look like this: > >> > > >> > innerHashJoin(parallel(innerJoin(bigStream, bigStream)), > smallerStream) > >> > > >> > The largest join can be done in parallel using an innerJoin. You can > >> then > >> > wrap the stream coming out of the parallel function in an > innerHashJoin > >> to > >> > join it to another stream. > >> > > >> > > >> > > >> > > >> > > >> > > >> > > >> > > >> > > >> > > >> > > >> > > >> > > >> > > >> > > >> > Joel Bernstein > >> > http://joelsolr.blogspot.com/ > >> > > >> > On Mon, May 1, 2017 at 9:42 PM, Zheng Lin Edwin Yeo < > >> edwinye...@gmail.com> > >> > wrote: > >> > > >> >> Hi, > >> >> > >> >> Is it possible to join more than 2 collections using one of the > >> streaming > >> >> expressions (Eg: innerJoin)? If not, is there other ways we can do > it? > >> >> > >> >> Currently, I may need to join 3 or 4 collections together, and to > >> output > >> >> selected fields from all these collections together. > >> >> > >> >> I'm using Solr 6.4.2. > >> >> > >> >> Regards, > >> >> Edwin > >> >> > >> > > >> > > >> > > > > >
