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fix(search): use to_tsquery('simple') for prefix transform to avoid German stop word collision
Words like "Wille" stem to "will" via the German Snowball stemmer, which is
also a German stop word. The prefix-transform step (websearch_to_tsquery text →
regexp_replace → to_tsquery) was passing already-stemmed lexemes back through
the German dictionary, causing them to be silently dropped as stop words. Using
the 'simple' configuration skips stop-word processing entirely while the
tsvector @@ tsquery comparison still works because lexemes are matched by
string value, not by configuration.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
2026-04-25 21:40:07 +02:00
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