On MySQL and MariaDB (the compressed content_bin code path,
isCompressed() === true), three of the four regex-search constructions
in FreshRSS_EntryDAO::sqlBooleanSearch() generated invalid SQL, so the
query failed and the search silently returned zero articles:
* intext:/regex/ appended a stray closing parenthesis after
sqlRegex(...) (MySQL error 1248);
* -intext:/regex/ had the same stray parenthesis;
* -/regex/ emitted ' ANT NOT ' instead of ' AND NOT '
(MySQL error 1064).
sqlRegex() already returns a self-contained, balanced expression
(REGEXP_LIKE(expr, ?, 'flags') or expr REGEXP ?), so no extra
parenthesis is needed, matching the uncompressed (SQLite / PostgreSQL)
branches.
The existing MySQL / MariaDB unit tests for intext:/regex/ had
captured the buggy unbalanced SQL as their expected strings; they are
corrected, and new cases are added for -intext:/regex/ and -/regex/
on both flavours.
Co-authored-by: Claude Fable 5 <noreply@anthropic.com>
