On Monday, February 4, 2019, David Rowley <[email protected]> wrote:
> On Tue, 5 Feb 2019 at 01:12, Daniel Gustafsson <[email protected]> wrote: > > We may also want to use the + metacharacter instead of * in a few > places, since > > the intent is to always match something, where matching nothing should be > > considered an error: > > > > - qr/^ALTER TEXT SEARCH DICTIONARY > dump_test.alt_ts_dict1 OWNER TO .*;/m, > > + qr/^ALTER TEXT SEARCH DICTIONARY > dump_test\.alt_ts_dict1 OWNER TO .*;/m, > > I looked for instances of * alone and didn't see any. I only saw ones > prefixed with ".", in which case, isn't that matching 1 or more chars > already? No. In Regex the following are equivalent: .* == .{0,} .+ == .{1,} . == .{1} A “*” by itself would either be an error or, assuming the preceding character is a space (so it visually looks alone) would be zero or more consecutive spaces. In the above “...OWNER TO<space>;” is a valid match. David J.
