Hi, Gábor! On Apr 14, Gábor Kövesdán wrote:

Hi,

I'm a student interested in this GSoC project. I already participated in GSoC several times, one of those involved porting the TRE regex engine to FreeBSD. I also worked on some optimizations for that. Since then I've started the PhD course in modeling and domain-specific languages, which made me more familiar with the theory of parsing and automata. I'm experienced in C and I can get along with C++. I'd like to ask what are the exact requirements of this project? Is it about plugging in an existing regexp engine into MariaDB, like RE2 or TRE? Or writing a new implementation? Could you please give me some pointers where to look at the code to see how regexes are used in MariaDB? Also, what other preliminary research should I do to write a good application?

This task is about plugging an existing regexp engine into MariaDB. And about adding REGEX_REPLACE function, but that's at most 10% of the task, probably less. (I'll show to do it, it's really simple) Pointers. There's regex/ subdirectory in the source tree. The API is in the regex/my_regex.h. If you grep the source code for API functions, like my_regcomp, my_regexec, etc - you'll see where they are used. Preliminary research - only about chosing a regex library to use in MariaDB. You should be able to explain why we should use this library and not some other one. Regards, Sergei