csplit regex with pipe (|)

Question

i want to split file by regular expression, i have file format as below

0|t| lorem ...
some text 
138|t| title 
some text 

if i execute egrep "[0-9]+\|t\|" file | wc -l it counts occurrence correctly but if i execute csplit filename /[0-9]+\|t\|/ then it says no match found and does not split file.

seems some issue with pipe in pattern but not able to figure out solution.

Answer 1

You must realize that csplit regexes are Basic Regular Expressions (BRE) and hence would not understand the + \| etc.

Just do this:

csplit yourfile '%^[0-9]*|t|%' '/^[0-9]*|t|/' '{*}'

Then look for files named xxNN in your current directory.