You can also create an index on the result of the function[0]. [0] https://www.postgresql.org/docs/12/indexes-expressional.html https://www.postgresql.org/docs

You can also create an index on the result of the function[0]. [0] https://www.postgresql.org/docs/12/indexes-expressional.html https://www.postgresql.org/docs/12/indexes-expressional.html