PostgreSQL count number of times substring occurs in text

Question

I\'m writing a PostgreSQL function to count the number of times a particular text substring occurs in another piece of text. For example, calling count(\'foobarbaz\', \'ba\'

Answer 1

There is a

str_count( src,  occurence )

function based on

SELECT (length( str ) - length(replace( str, occurrence, '' ))) / length( occurence )

and a

str_countm( src, regexp )

based on the @MikeT-mentioned

SELECT count(*) FROM regexp_matches( str, regexp, 'g')

available here: postgres-utils