How about adding null as an alteration.
Would this be robust?
Regards,
David
On Tue, 25 Jan 2022 at 14:25, David G. Johnston <david.g.johnston@xxxxxxxxx> wrote:
On Tue, Jan 25, 2022 at 6:56 AM Shaozhong SHI <shishaozhong@xxxxxxxxx> wrote:select form from mytable where form ~ '^Canal$|^Drain$|^Foreshore$|^inlandRiver$|^Lake$|^lockOrFlightOfLocks$|^Marsh$|^Researvoir$|^Sea$|^tidalRiver$|^Transfer$'You do not need to repeat the boundary metacharacters on each branch. You can assert their presence just once and then use parentheses to group the alternations.form ~ '^(?Canal|Drain|etc...)$'David J.
