pá 15. 3. 2019 v 17:16 odesílatel Tom Lane <tgl@sss.pgh.pa.us> napsal:
Chapman Flack <chap@anastigmatix.net> writes: > So the proposal seems roughly equivalent to making string_to_array's > second parameter optional default null, and array_to_string's second > parameter optional default ''.
In that case why bother? It'll just create a cross-version compatibility hazard for next-to-no keystroke savings. If the cases were so common that they could be argued to be sane "default" behavior, I might feel differently --- but if you were asked in a vacuum what the default delimiters ought to be, I don't think you'd say "no delimiter".
My motivation is following - sometimes I need to convert string to array of chars. Using NULL as separator is possible, but it is not intuitive. When you use string_to_array function without separator, then only one possible semantic is there - separation by chars.
I understand so there is a possible collision and possible meaning of missing parameter like default value. But in this case this meaning, semantic is not practical.