Parsing `interval` into `CalendarDiffTime` fails in `PostgreSQL`

[tysonzero]

I get a ConversionFailed exception with:

• errSQLType = "interval"
• errHaskellType = "CalendarDiffTime"

and a few different possible error messages depending on the value:

• errMessage = "Failed reading: no parse of \"00:00:00\""
• errMessage = "Failed reading: no parse of \"00:00:01\""
• errMessage = "Failed reading: no parse of \"1 mon\""

Note that writing seems to work just fine, I was able to insert the above rows without issue, I just can't selectTable them back.

[tysonzero]

Ah oops I just read the note, works fine with intervalstyle configured appropriately. Could still be nice to not require that setting change, although from following the code it seems like the parsing code lives in postgresql-simple anyway. Feel free to close.