Regular expressions can be implemented in databases with quite a bit of success. I use them for some stuff in PostgreSQL and it is blazingly fast. It shouldn't matter for complicated the regular expressions are, the simple fact that the database software only has to read a (relatively) small index file from disk instead of everything in the table (full table scan) should still speed up the search. And many databases also keep frequently used indexes in RAM.

Generally, i think of SQLite more of a desktop-type database that is integrated into a single application with a relatively small amount of data. For serious data crunching, i always choose a serious standalone database like PostgreSQL (hey, it's the same price as SQLite).

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In reply to Re^4: Documentation of REGEXP support in DBD::SQLite? by cavac
in thread Documentation of REGEXP support in DBD::SQLite? by ibm1620

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