Steven White [swhite4...@gmail.com] wrote: > If I have 50 fields in a Solr doc and I index them without doing any > <copyField> to a catch-all-field called "all_text". During search I use > "fq" to list all the 50 fields to search on. Now how different is this > from not using "fq" and searching against my catch-all-field of "all_text" > using "q"?
One potential use it to have the catch-all-field perform severe normalization to match more queries but rank those extra matches lower than a direct hit in a specific field. The same effect can be accomplished by having differently analyzed versions of the same logical field: Having a single catch-all is just easy to do. Another reason can be performance: fq-matching against all fields is heavier than matching against a few fields and the catch-all. - Toke Eskildsen
