'_ALL' AS all was to go in your
sql_query - in the definition of a disk index, to create a new ‘fake’ field, called
Not to go in the SphinxQL query itself.
Only now notice your index is called
rt so perahaps its Real Time Index?
Createing such a field will need a new
rt_field in the index definition, but also possibly the index recreateing from scratch, because each ‘INSERT INTO’ the index, will need to send data for the field.
INSERT INTO rt (id,all,ft_subject,ts_sent) VALUES ($id, '_all', $content, $ts_sent)
all field is literally a hardcoded string.