No *:* will simply return all the results from one of the queries. It should still join properly. If you are using the /select handler joins will not work properly.
This example worked properly for me: hashJoin(parallel(collection2, j workers=3, sort="id asc", innerJoin(search(collection2, q="*:*", fl="id", sort="id asc", qt="/export", partitionKeys="id"), search(collection2, q="year_i:42", fl="id, year_i", sort="id asc", qt="/export", partitionKeys="id"), on="id")), hashed=search(collection2, q="day_i:7", fl="id, day_i", sort="id asc", qt="/export"), on="id") Joel Bernstein http://joelsolr.blogspot.com/ On Thu, May 4, 2017 at 12:28 PM, Zheng Lin Edwin Yeo <edwinye...@gmail.com> wrote: > Hi Joel, > > For the join queries, is it true that if we use q=*:* for the query for one > of the join, there will not be any results return? > > Currently I found this is the case, if I just put q=*:*. > > Regards, > Edwin > > > On 4 May 2017 at 23:38, Zheng Lin Edwin Yeo <edwinye...@gmail.com> wrote: > > > Hi Joel, > > > > I think that might be one of the reason. > > This is what I have for the /export handler in my solrconfig.xml > > > > <requestHandler name="/export" class="solr.SearchHandler"> <lst name= > > "invariants"> <str name="rq">{!xport}</str> <str name="wt">xsort</str> < > > str name="distrib">false</str> </lst> <arr name="components"> > <str>query</ > > str> </arr> </requestHandler> > > > > This is the error message that I get when I use the /export handler. > > > > java.io.IOException: java.util.concurrent.ExecutionException: > > java.io.IOException: --> http://localhost:8983/solr/ > > collection1_shard1_replica1/: An exception has occurred on the server, > > refer to server log for details. > > at org.apache.solr.client.solrj.io.stream.CloudSolrStream. > > openStreams(CloudSolrStream.java:451) > > at org.apache.solr.client.solrj.io.stream.CloudSolrStream. > > open(CloudSolrStream.java:308) > > at org.apache.solr.client.solrj.io.stream.PushBackStream.open( > > PushBackStream.java:70) > > at org.apache.solr.client.solrj.io.stream.JoinStream.open( > > JoinStream.java:147) > > at org.apache.solr.client.solrj.io.stream.ExceptionStream. > > open(ExceptionStream.java:51) > > at org.apache.solr.handler.StreamHandler$TimerStream. > > open(StreamHandler.java:457) > > at org.apache.solr.client.solrj.io.stream.TupleStream. > > writeMap(TupleStream.java:63) > > at org.apache.solr.response.JSONWriter.writeMap( > > JSONResponseWriter.java:547) > > at org.apache.solr.response.TextResponseWriter.writeVal( > > TextResponseWriter.java:193) > > at org.apache.solr.response.JSONWriter.writeNamedListAsMapWithDups( > > JSONResponseWriter.java:209) > > at org.apache.solr.response.JSONWriter.writeNamedList( > > JSONResponseWriter.java:325) > > at org.apache.solr.response.JSONWriter.writeResponse( > > JSONResponseWriter.java:120) > > at org.apache.solr.response.JSONResponseWriter.write( > > JSONResponseWriter.java:71) > > at org.apache.solr.response.QueryResponseWriterUtil.writeQueryResponse( > > QueryResponseWriterUtil.java:65) > > at org.apache.solr.servlet.HttpSolrCall.writeResponse( > > HttpSolrCall.java:732) > > at org.apache.solr.servlet.HttpSolrCall.call(HttpSolrCall.java:473) > > at org.apache.solr.servlet.SolrDispatchFilter.doFilter( > > SolrDispatchFilter.java:345) > > at org.apache.solr.servlet.SolrDispatchFilter.doFilter( > > SolrDispatchFilter.java:296) > > at org.eclipse.jetty.servlet.ServletHandler$CachedChain. > > doFilter(ServletHandler.java:1691) > > at org.eclipse.jetty.servlet.ServletHandler.doHandle( > > ServletHandler.java:582) > > at org.eclipse.jetty.server.handler.ScopedHandler.handle( > > ScopedHandler.java:143) > > at org.eclipse.jetty.security.SecurityHandler.handle( > > SecurityHandler.java:548) > > at org.eclipse.jetty.server.session.SessionHandler. > > doHandle(SessionHandler.java:226) > > at org.eclipse.jetty.server.handler.ContextHandler. > > doHandle(ContextHandler.java:1180) > > at org.eclipse.jetty.servlet.ServletHandler.doScope( > > ServletHandler.java:512) > > at org.eclipse.jetty.server.session.SessionHandler. > > doScope(SessionHandler.java:185) > > at org.eclipse.jetty.server.handler.ContextHandler. > > doScope(ContextHandler.java:1112) > > at org.eclipse.jetty.server.handler.ScopedHandler.handle( > > ScopedHandler.java:141) > > at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle( > > ContextHandlerCollection.java:213) > > at org.eclipse.jetty.server.handler.HandlerCollection. > > handle(HandlerCollection.java:119) > > at org.eclipse.jetty.server.handler.HandlerWrapper.handle( > > HandlerWrapper.java:134) > > at org.eclipse.jetty.server.Server.handle(Server.java:534) > > at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:320) > > at org.eclipse.jetty.server.HttpConnection.onFillable( > > HttpConnection.java:251) > > at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded( > > AbstractConnection.java:273) > > at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:95) > > at org.eclipse.jetty.io.SelectChannelEndPoint$2.run( > > SelectChannelEndPoint.java:93) > > at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume. > > executeProduceConsume(ExecuteProduceConsume.java:303) > > at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume. > > produceConsume(ExecuteProduceConsume.java:148) > > at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.run( > > ExecuteProduceConsume.java:136) > > at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob( > > QueuedThreadPool.java:671) > > at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run( > > QueuedThreadPool.java:589) > > at java.lang.Thread.run(Thread.java:745) > > Caused by: java.util.concurrent.ExecutionException: java.io.IOException: > > --> http://localhost:8983/solr/collection1_shard1_replica1/: An > exception > > has occurred on the server, refer to server log for details. > > at java.util.concurrent.FutureTask.report(FutureTask.java:122) > > at java.util.concurrent.FutureTask.get(FutureTask.java:192) > > at org.apache.solr.client.solrj.io.stream.CloudSolrStream. > > openStreams(CloudSolrStream.java:445) > > ... 42 more > > Caused by: java.io.IOException: --> http://localhost:8983/solr/ > > collection1_shard1_replica1/: An exception has occurred on the server, > > refer to server log for details. > > at org.apache.solr.client.solrj.io.stream.SolrStream.read( > > SolrStream.java:238) > > at org.apache.solr.client.solrj.io.stream.CloudSolrStream$ > > TupleWrapper.next(CloudSolrStream.java:541) > > at org.apache.solr.client.solrj.io.stream.CloudSolrStream$ > > StreamOpener.call(CloudSolrStream.java:564) > > at org.apache.solr.client.solrj.io.stream.CloudSolrStream$ > > StreamOpener.call(CloudSolrStream.java:551) > > at java.util.concurrent.FutureTask.run(FutureTask.java:266) > > at org.apache.solr.common.util.ExecutorUtil$MDCAwareThreadPoolExecutor. > > lambda$execute$0(ExecutorUtil.java:229) > > at java.util.concurrent.ThreadPoolExecutor.runWorker( > > ThreadPoolExecutor.java:1142) > > at java.util.concurrent.ThreadPoolExecutor$Worker.run( > > ThreadPoolExecutor.java:617) > > ... 1 more > > Caused by: org.noggit.JSONParser$ParseException: JSON Parse Error: > > char=<,position=0 BEFORE='<' AFTER='?xml version="1.0" > encoding="UTF-8"?> <' > > at org.noggit.JSONParser.err(JSONParser.java:356) > > at org.noggit.JSONParser.handleNonDoubleQuoteString(JSONParser.java:712) > > at org.noggit.JSONParser.next(JSONParser.java:886) > > at org.noggit.JSONParser.nextEvent(JSONParser.java:930) > > at org.apache.solr.client.solrj.io.stream.JSONTupleStream. > > expect(JSONTupleStream.java:97) > > at org.apache.solr.client.solrj.io.stream.JSONTupleStream. > > advanceToDocs(JSONTupleStream.java:179) > > at org.apache.solr.client.solrj.io.stream.JSONTupleStream. > > next(JSONTupleStream.java:77) > > at org.apache.solr.client.solrj.io.stream.SolrStream.read( > > SolrStream.java:207) > > ... 8 more > > > > > > Regards, > > Edwin > > > > > > On 4 May 2017 at 22:54, Joel Bernstein <joels...@gmail.com> wrote: > > > >> I suspect that there is something not quite right about the how the > >> /export > >> handler is configured. Straight out of the box in solr 6.4.2 /export > will > >> be automatically configured. Are you using a Solr instance that has been > >> upgraded in the past and doesn't have standard 6.4.2 configs? > >> > >> To really do joins properly you'll have to use the /export handler > because > >> /select will not stream entire result sets (unless they are pretty > small). > >> So your results will be missing data possibly. > >> > >> I would take a close look at the logs and see what all the exceptions > are > >> when you run the a search using qt=/export. If you can post all the > stack > >> traces that get generated when you run the search we'll probably be able > >> to > >> spot the issue. > >> > >> About the field ordering. There is support for field ordering in the > >> Streaming classes but only a few places actually enforce the order. The > >> 6.5 > >> SQL interface does keep the fields in order as does the new Tuple > >> expression in Solr 6.6. But the expressions you are working with > currently > >> don't enforce field ordering. > >> > >> > >> > >> > >> Joel Bernstein > >> http://joelsolr.blogspot.com/ > >> > >> On Thu, May 4, 2017 at 2:41 AM, Zheng Lin Edwin Yeo < > edwinye...@gmail.com > >> > > >> wrote: > >> > >> > Hi Joel, > >> > > >> > I have managed to get the Join to work, but so far it is only working > >> when > >> > I use qt="/select". It is not working when I use qt="/export". > >> > > >> > For the display of the field, is there a way to allow it to list them > in > >> > the order which I want? > >> > Currently, the display is quite random, and I can get a field in > >> > collection1, followed by a field in collection3, then collection1 > again, > >> > and then collection2. > >> > > >> > It will be good if we can arrange the field to display in the order > >> that we > >> > want. > >> > > >> > Regards, > >> > Edwin > >> > > >> > > >> > > >> > On 4 May 2017 at 09:56, Zheng Lin Edwin Yeo <edwinye...@gmail.com> > >> wrote: > >> > > >> > > Hi Joel, > >> > > > >> > > It works when I started off with just one expression. > >> > > > >> > > Could it be that the data size is too big for export after the join, > >> > which > >> > > causes the error? > >> > > > >> > > Regards, > >> > > Edwin > >> > > > >> > > On 4 May 2017 at 02:53, Joel Bernstein <joels...@gmail.com> wrote: > >> > > > >> > >> I was just testing with the query below and it worked for me. Some > of > >> > the > >> > >> error messages I was getting with the syntax was not what I was > >> > expecting > >> > >> though, so I'll look into the error handling. But the joins do work > >> when > >> > >> the syntax correct. The query below is joining to the same > collection > >> > >> three > >> > >> times, but the mechanics are exactly the same joining three > different > >> > >> tables. In this example each join narrows down the result set. > >> > >> > >> > >> hashJoin(parallel(collection2, > >> > >> workers=3, > >> > >> sort="id asc", > >> > >> innerJoin(search(collection2, q="*:*", > >> > >> fl="id", > >> > >> sort="id asc", qt="/export", partitionKeys="id"), > >> > >> search(collection2, > >> > >> q="year_i:42", fl="id, year_i", sort="id asc", qt="/export", > >> > >> partitionKeys="id"), > >> > >> on="id")), > >> > >> hashed=search(collection2, q="day_i:7", fl="id, > >> day_i", > >> > >> sort="id asc", qt="/export"), > >> > >> on="id") > >> > >> > >> > >> Joel Bernstein > >> > >> http://joelsolr.blogspot.com/ > >> > >> > >> > >> On Wed, May 3, 2017 at 1:29 PM, Joel Bernstein <joels...@gmail.com > > > >> > >> wrote: > >> > >> > >> > >> > Start off with just this expression: > >> > >> > > >> > >> > search(collection2, > >> > >> > q=*:*, > >> > >> > fl="a_s,b_s,c_s,d_s,e_s", > >> > >> > sort="a_s asc", > >> > >> > qt="/export") > >> > >> > > >> > >> > And then check the logs for exceptions. > >> > >> > > >> > >> > Joel Bernstein > >> > >> > http://joelsolr.blogspot.com/ > >> > >> > > >> > >> > On Wed, May 3, 2017 at 12:35 PM, Zheng Lin Edwin Yeo < > >> > >> edwinye...@gmail.com > >> > >> > > wrote: > >> > >> > > >> > >> >> Hi Joel, > >> > >> >> > >> > >> >> I am getting this error after I change add qt=/export and > removed > >> the > >> > >> rows > >> > >> >> param. Do you know what could be the reason? > >> > >> >> > >> > >> >> { > >> > >> >> "error":{ > >> > >> >> "metadata":[ > >> > >> >> "error-class","org.apache.solr.common.SolrException", > >> > >> >> "root-error-class","org.apache.http. > MalformedChunkCodingExc > >> e > >> > >> >> ption"], > >> > >> >> "msg":"org.apache.http.MalformedChunkCodingException: CRLF > >> > >> expected > >> > >> >> at > >> > >> >> end of chunk", > >> > >> >> "trace":"org.apache.solr.common.SolrException: > >> > >> >> org.apache.http.MalformedChunkCodingException: CRLF expected at > >> end > >> > of > >> > >> >> chunk\r\n\tat > >> > >> >> org.apache.solr.client.solrj.io.stream.TupleStream.lambda$wr > >> > >> >> iteMap$0(TupleStream.java:79)\r\n\tat > >> > >> >> org.apache.solr.response.JSONWriter.writeIterator(JSONRespon > >> > >> >> seWriter.java:523)\r\n\tat > >> > >> >> org.apache.solr.response.TextResponseWriter.writeVal(TextRes > >> > >> >> ponseWriter.java:175)\r\n\tat > >> > >> >> org.apache.solr.response.JSONWriter$2.put(JSONResponseWriter > >> > >> >> .java:559)\r\n\tat > >> > >> >> org.apache.solr.client.solrj.io.stream.TupleStream.writeMap( > >> > >> >> TupleStream.java:64)\r\n\tat > >> > >> >> org.apache.solr.response.JSONWriter.writeMap(JSONResponseWri > >> > >> >> ter.java:547)\r\n\tat > >> > >> >> org.apache.solr.response.TextResponseWriter.writeVal(TextRes > >> > >> >> ponseWriter.java:193)\r\n\tat > >> > >> >> org.apache.solr.response.JSONWriter.writeNamedListAsMapWithD > >> > >> >> ups(JSONResponseWriter.java:209)\r\n\tat > >> > >> >> org.apache.solr.response.JSONWriter.writeNamedList(JSONRespo > >> > >> >> nseWriter.java:325)\r\n\tat > >> > >> >> org.apache.solr.response.JSONWriter.writeResponse(JSONRespon > >> > >> >> seWriter.java:120)\r\n\tat > >> > >> >> org.apache.solr.response.JSONResponseWriter.write(JSONRespon > >> > >> >> seWriter.java:71)\r\n\tat > >> > >> >> org.apache.solr.response.QueryResponseWriterUtil.writeQueryR > >> > >> >> esponse(QueryResponseWriterUtil.java:65)\r\n\tat > >> > >> >> org.apache.solr.servlet.HttpSolrCall.writeResponse(HttpSolrC > >> > >> >> all.java:732)\r\n\tat > >> > >> >> org.apache.solr.servlet.HttpSolrCall.call(HttpSolrCall.java: > >> > >> 473)\r\n\tat > >> > >> >> org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDisp > >> > >> >> atchFilter.java:345)\r\n\tat > >> > >> >> org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDisp > >> > >> >> atchFilter.java:296)\r\n\tat > >> > >> >> org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilte > >> > >> >> r(ServletHandler.java:1691)\r\n\tat > >> > >> >> org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHan > >> > >> >> dler.java:582)\r\n\tat > >> > >> >> org.eclipse.jetty.server.handler.ScopedHandler.handle(Scoped > >> > >> >> Handler.java:143)\r\n\tat > >> > >> >> org.eclipse.jetty.security.SecurityHandler.handle(SecurityHa > >> > >> >> ndler.java:548)\r\n\tat > >> > >> >> org.eclipse.jetty.server.session.SessionHandler.doHandle( > >> > >> >> SessionHandler.java:226)\r\n\tat > >> > >> >> org.eclipse.jetty.server.handler.ContextHandler.doHandle( > >> > >> >> ContextHandler.java:1180)\r\n\tat > >> > >> >> org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHand > >> > >> >> ler.java:512)\r\n\tat > >> > >> >> org.eclipse.jetty.server.session.SessionHandler.doScope( > >> > >> >> SessionHandler.java:185)\r\n\tat > >> > >> >> org.eclipse.jetty.server.handler.ContextHandler.doScope( > >> > >> >> ContextHandler.java:1112)\r\n\tat > >> > >> >> org.eclipse.jetty.server.handler.ScopedHandler.handle(Scoped > >> > >> >> Handler.java:141)\r\n\tat > >> > >> >> org.eclipse.jetty.server.handler.ContextHandlerCollection.ha > >> > >> >> ndle(ContextHandlerCollection.java:213)\r\n\tat > >> > >> >> org.eclipse.jetty.server.handler.HandlerCollection.handle( > >> > >> >> HandlerCollection.java:119)\r\n\tat > >> > >> >> org.eclipse.jetty.server.handler.HandlerWrapper.handle(Handl > >> > >> >> erWrapper.java:134)\r\n\tat > >> > >> >> org.eclipse.jetty.server.Server.handle(Server.java:534)\r\n\tat > >> > >> >> org.eclipse.jetty.server.HttpChannel.handle(HttpChannel. > >> > >> java:320)\r\n\tat > >> > >> >> org.eclipse.jetty.server.HttpConnection.onFillable(HttpConne > >> > >> >> ction.java:251)\r\n\tat > >> > >> >> org.eclipse.jetty.io.AbstractConnection$ReadCallback. > >> > >> >> succeeded(AbstractConnection.java:273)\r\n\tat > >> > >> >> org.eclipse.jetty.io.FillInterest.fillable(FillInterest. > >> > >> java:95)\r\n\tat > >> > >> >> org.eclipse.jetty.io.SelectChannelEndPoint$2.run(SelectChann > >> > >> >> elEndPoint.java:93)\r\n\tat > >> > >> >> org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume > >> > >> >> .executeProduceConsume(ExecuteProduceConsume.java:303)\r\n\tat > >> > >> >> org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume > >> > >> >> .produceConsume(ExecuteProduceConsume.java:148)\r\n\tat > >> > >> >> org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume > >> > >> >> .run(ExecuteProduceConsume.java:136)\r\n\tat > >> > >> >> org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(Queued > >> > >> >> ThreadPool.java:671)\r\n\tat > >> > >> >> org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedT > >> > >> >> hreadPool.java:589)\r\n\tat > >> > >> >> java.lang.Thread.run(Thread.java:745)\r\nCaused by: > >> > >> >> org.apache.http.MalformedChunkCodingException: CRLF expected at > >> end > >> > of > >> > >> >> chunk\r\n\tat > >> > >> >> org.apache.http.impl.io.ChunkedInputStream.getChunkSize(Chun > >> > >> >> kedInputStream.java:255)\r\n\tat > >> > >> >> org.apache.http.impl.io.ChunkedInputStream.nextChunk(Chunked > >> > >> >> InputStream.java:227)\r\n\tat > >> > >> >> org.apache.http.impl.io.ChunkedInputStream.read(ChunkedInput > >> > >> >> Stream.java:186)\r\n\tat > >> > >> >> org.apache.http.impl.io.ChunkedInputStream.read(ChunkedInput > >> > >> >> Stream.java:215)\r\n\tat > >> > >> >> org.apache.http.impl.io.ChunkedInputStream.close(ChunkedInpu > >> > >> >> tStream.java:316)\r\n\tat > >> > >> >> org.apache.http.conn.BasicManagedEntity.streamClosed(BasicMa > >> > >> >> nagedEntity.java:164)\r\n\tat > >> > >> >> org.apache.http.conn.EofSensorInputStream.checkClose(EofSens > >> > >> >> orInputStream.java:228)\r\n\tat > >> > >> >> org.apache.http.conn.EofSensorInputStream.close(EofSensorInp > >> > >> >> utStream.java:174)\r\n\tat > >> > >> >> sun.nio.cs.StreamDecoder.implClose(StreamDecoder.java:378)\ > >> r\n\tat > >> > >> >> sun.nio.cs.StreamDecoder.close(StreamDecoder.java:193)\r\n\tat > >> > >> >> java.io.InputStreamReader.close(InputStreamReader.java:199)\ > >> r\n\tat > >> > >> >> org.apache.solr.client.solrj.io.stream.JSONTupleStream.close > >> > >> >> (JSONTupleStream.java:92)\r\n\tat > >> > >> >> org.apache.solr.client.solrj.io.stream.SolrStream.close(Solr > >> > >> >> Stream.java:193)\r\n\tat > >> > >> >> org.apache.solr.client.solrj.io.stream.CloudSolrStream.close > >> > >> >> (CloudSolrStream.java:464)\r\n\tat > >> > >> >> org.apache.solr.client.solrj.io.stream.HashJoinStream.close( > >> > >> >> HashJoinStream.java:231)\r\n\tat > >> > >> >> org.apache.solr.client.solrj.io.stream.ExceptionStream.close > >> > >> >> (ExceptionStream.java:93)\r\n\tat > >> > >> >> org.apache.solr.handler.StreamHandler$TimerStream.close( > >> > >> >> StreamHandler.java:452)\r\n\tat > >> > >> >> org.apache.solr.client.solrj.io.stream.TupleStream.lambda$wr > >> > >> >> iteMap$0(TupleStream.java:71)\r\n\t... > >> > >> >> 40 more\r\n", > >> > >> >> "code":500}} > >> > >> >> > >> > >> >> > >> > >> >> Regards, > >> > >> >> Edwin > >> > >> >> > >> > >> >> > >> > >> >> On 4 May 2017 at 00:00, Joel Bernstein <joels...@gmail.com> > >> wrote: > >> > >> >> > >> > >> >> > I've reformatted the expression below and made a few changes. > >> You > >> > >> have > >> > >> >> put > >> > >> >> > things together properly. But these are MapReduce joins that > >> > require > >> > >> >> > exporting the entire result sets. So you will need to add > >> > qt=/export > >> > >> to > >> > >> >> all > >> > >> >> > the searches and remove the rows param. In Solr 6.6. there is > a > >> new > >> > >> >> > "shuffle" expression that does this automatically. > >> > >> >> > > >> > >> >> > To test things you'll want to break down each expression and > >> make > >> > >> sure > >> > >> >> it's > >> > >> >> > behaving as expected. > >> > >> >> > > >> > >> >> > For example first run each search. Then run the innerJoin, not > >> in > >> > >> >> parallel > >> > >> >> > mode. Then run it in parallel mode. Then try the whole thing. > >> > >> >> > > >> > >> >> > hashJoin(parallel(collection2, > >> > >> >> > innerJoin(search(collection2, > >> > >> >> > q=*:*, > >> > >> >> > > >> > >> >> > fl="a_s,b_s,c_s,d_s,e_s", > >> > >> >> > > sort="a_s > >> > >> asc", > >> > >> >> > > >> > >> >> partitionKeys="a_s", > >> > >> >> > > >> > qt="/export"), > >> > >> >> > search(collection1, > >> > >> >> > q=*:*, > >> > >> >> > > >> > >> >> > fl="a_s,f_s,g_s,h_s,i_s,j_s", > >> > >> >> > > sort="a_s > >> > >> asc", > >> > >> >> > > >> > >> >> partitionKeys="a_s", > >> > >> >> > > >> > qt="/export"), > >> > >> >> > on="a_s"), > >> > >> >> > workers="2", > >> > >> >> > sort="a_s asc"), > >> > >> >> > hashed=search(collection3, > >> > >> >> > q=*:*, > >> > >> >> > fl="a_s,k_s,l_s", > >> > >> >> > sort="a_s asc", > >> > >> >> > qt="/export"), > >> > >> >> > on="a_s") > >> > >> >> > > >> > >> >> > Joel Bernstein > >> > >> >> > http://joelsolr.blogspot.com/ > >> > >> >> > > >> > >> >> > On Wed, May 3, 2017 at 11:26 AM, Zheng Lin Edwin Yeo < > >> > >> >> edwinye...@gmail.com > >> > >> >> > > > >> > >> >> > wrote: > >> > >> >> > > >> > >> >> > > Hi Joel, > >> > >> >> > > > >> > >> >> > > Thanks for the clarification. > >> > >> >> > > > >> > >> >> > > Would like to check, is this the correct way to do the join? > >> > >> >> Currently, I > >> > >> >> > > could not get any results after putting in the hashJoin for > >> the > >> > >> 3rd, > >> > >> >> > > smallerStream collection (collection3). > >> > >> >> > > > >> > >> >> > > http://localhost:8983/solr/collection1/stream?expr= > >> > >> >> > > hashJoin(parallel(collection2 > >> > >> >> > > , > >> > >> >> > > innerJoin( > >> > >> >> > > search(collection2, > >> > >> >> > > q=*:*, > >> > >> >> > > fl="a_s,b_s,c_s,d_s,e_s", > >> > >> >> > > sort="a_s asc", > >> > >> >> > > partitionKeys="a_s", > >> > >> >> > > rows=200), > >> > >> >> > > search(collection1, > >> > >> >> > > q=*:*, > >> > >> >> > > fl="a_s,f_s,g_s,h_s,i_s,j_s", > >> > >> >> > > sort="a_s asc", > >> > >> >> > > partitionKeys="a_s", > >> > >> >> > > rows=200), > >> > >> >> > > on="a_s"), > >> > >> >> > > workers="2", > >> > >> >> > > sort="a_s asc"), > >> > >> >> > > hashed=search(collection3, > >> > >> >> > > q=*:*, > >> > >> >> > > fl="a_s,k_s,l_s", > >> > >> >> > > sort="a_s asc", > >> > >> >> > > rows=200), > >> > >> >> > > on="a_s") > >> > >> >> > > &indent=true > >> > >> >> > > > >> > >> >> > > > >> > >> >> > > Regards, > >> > >> >> > > Edwin > >> > >> >> > > > >> > >> >> > > > >> > >> >> > > On 3 May 2017 at 20:59, Joel Bernstein <joels...@gmail.com> > >> > wrote: > >> > >> >> > > > >> > >> >> > > > 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 > >> > >> >> > > > > >> >> > >> > >> >> > > > > >> > > >> > >> >> > > > > >> > > >> > >> >> > > > > >> > >> > >> >> > > > > > > >> > >> >> > > > > > > >> > >> >> > > > > > >> > >> >> > > > > >> > >> >> > > > >> > >> >> > > >> > >> >> > >> > >> > > >> > >> > > >> > >> > >> > > > >> > > > >> > > >> > > > > >