val function should return numeric value from string up to first non-digit character, considering first decimal point also:
val('1,2TEST') should return 1.2 val('1,2,3') should return 1.2 val('-1,2,3') should return -1.2
SELECT coalesce(nullif('0'||substring(Translate($1,',','.'), '^-?[0-9]+\.?[0-9]*$'),''),'0')::numeric; select val('1,2%') How to force it to return 1.2 ?
It should work starting from Postgres 9.0
Removing the $ from your regexp pattern should work for the 4 provided examples.
You cannot remove stuff from the end of a string if you require that the end of said string match what you want to return.
