[amirouche]

How would this work? You could boost the query term for instance, like it possible to boost the column score in postgresql but that is all. Otherwise allowing user to provide their own ranking function (which is itself an art) would not be pratical performance wise. It should be noted that search engine interface, the search box is already a DSL for the underlying algorithm that support OR/AND and NOT.

[ganeshkrishnan]

Its not postgres or RDBMS for text search. Its usually bigdata. For example we use apache spark to query parquet files on HDFS