Full-Text Search Implementation

Implement full-text search for this requirement:

**Table Schema:**
```sql
{{TABLE_SCHEMA}}
```

**Searchable Fields:** {{SEARCHABLE_FIELDS}}
**Search Requirements:**
- {{SEARCH_REQUIREMENTS}}

**Database System:** {{DATABASE_SYSTEM}}
**Language Requirements:** {{LANGUAGES}}

Please provide:
1. Full-text index creation
2. Search query implementation:
   - Basic search
   - Phrase search
   - Boolean operators
   - Fuzzy matching
   - Weighted ranking
3. Relevance scoring customization
4. Search result highlighting
5. Autocomplete/suggestions implementation
6. Performance optimization
7. Multi-language support
8. Comparison with external search (Elasticsearch)
9. Testing search quality