Well, if they’re all docValues or stored=true, sure. It’d be kind of slow.. The short form is “if you can specify fl=f1,f2,f3…. for all your fields and see all your values, then it’s easy if slow”.
If that works _and_ you are on Solr 4.7+ cursorMark will help the “deep paging” issue. If they’re all docValues, you could use the /export handler to dump them all to a file and re-index that. If none of those are possible, you can do this but it’d be quite painful. Luke can reassemble a document (lossily for text fields, but in this case it’d be OK since they’re simple types) by examining the inverted index and pulling out the values. Painfully slow and you’d have to write custom code probably at the Lucene level to make it all work. Best, Erick > On May 22, 2019, at 8:11 AM, Pushkar Raste <pushkar.ra...@gmail.com> wrote: > > I know this is a long shot. I am trying move from Solr4 to Solr7. > Reindexing all the data from the source is difficult to do in a reasonable > time. All the fields are of basic types like int, long, float, double, > Boolean, date, string. > > Since these fields don’t have analyzers, I was wondering if these fields > can be retrieved while iterating over index while reading the documents. > -- > — Pushkar Raste
