java - Difference Between '+' and '*' operation pattern in REGEXP -


i have table candidate in db running under mysql 5.5 , trying rows table xy contains in firstname, can run below 2 queries

select firstname candidate firstname regexp '^xy.+'; select firstname candidate firstname regexp '^xy.*';

i getting same result want differences in these 2 regexp.

+ causes resulting re match 1 or more repetitions of preceding re. ab+ match ‘a’ followed non-zero number of ‘b’s; not match ‘a’.
* causes resulting re match 0 or more repetitions of preceding re, many repetitions possible. ab* match ‘a’, ‘ab’, or ‘a’ followed number of ‘b’s.


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