Parsing tnsnames.ora using regex

Question

I am attempting to pull some information from my tnsnames file using regex. I started with the following pattern:

MYSCHEMA *? = *?[\\W\\w\\S\\s]*\\(HOST *?= *

Answer 1

This expression parse the schema with one address on address_list, etc. Hope this helps.

--begin (?>((?[\n][\s][^(][\w_.]+)[\s]=[\s]))(?>(?[\n\s(]DESCRIPTION[\s=\s](?>(?[\n\s(]*ADDRESS_LIST[\s=\s]*[\n\s(]ADDRESS[\s=\s](?([\n\s(]COMMUNITY)([\n\s(]COMMUNITY[\s=\s](?[\w.)]+))|())[\s\n](?([\n\s(]PROTOCOL)([\n\s(]PROTOCOL[\s=\s](?[\w.)]+))|())[\s\n](?([\n\s(]HOST)([\n\s(]HOST[\s=\s](?[\w.)]+))|())[\s\n](?([\n\s(]PORT)([\n\s(]PORT[\s=\s](?[\w.)]+))|())[\s\n](?())())|())))[\s\n](?>(?[\n][\s][(]CONNECT_DATA\s*[=]\s*[\n](?([(]SID\s[=]\s*)(([(]SID\s*[=]\s*(?[\w.]+)\s*[)]))|())[\s\n](?([(]SERVER\s[=]\s*)(([(]SERVER\s*[=]\s*(?[\w.]+)\s*[)]))|())[\s\n]*(?([(]SERVICE_NAME\s*[=]\s*)(([(]SERVICE_NAME\s*[=]\s*(?[\w.]+)\s*[)]))|())[\s\n](?())())|())))[\s\n](?())())|()))) *--end

Undoubtedly, the problem is the multiple that is in the form of writing that file. As you say the file must be unique, this is solved by using the TNS_ADMIN variable.