fix(postgresql): Add support for named parameters for function calls in postgres

[nguyenmp]

See https://www.postgresql.org/docs/current/sql-syntax-calling-funcs.html

You can call a Postgres SQL function with positional parameters or named parameters. Named parameters can either use := or =>:

SELECT concat_lower_or_upper(a => 'Hello', b => 'World');
SELECT concat_lower_or_upper(a => 'Hello', b => 'World', uppercase => true);
SELECT concat_lower_or_upper(a => 'Hello', uppercase => true, b => 'World');
SELECT concat_lower_or_upper(a := 'Hello', uppercase := true, b := 'World');
SELECT concat_lower_or_upper('Hello', 'World', uppercase => true);