sphinxsearch merge indexes on different column names

Question

If i have indexA which returns id, doc_id, attrA1, attrA2 and indexB with id, group_id, attrB1, attrB2, then is it possible to merge indexer --merge indexA indexB, so that the merged index will return id, doc_id, attrA1, attrA2, attrB1, attrB2? assuming that doc_id and group_id are equal, just with different column names

Answer 1

No. Dont think indexer can do this directly.

The closest might be to directly edit the .sph files. Ie rename the attributes. eg could rename 'group_id' to 'doc_id' in the original, so will merge correctly.

Not sure what will the seperate attributes in only one or other index. I think only common attributes are preserved.