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#### `YQL-21404`: Implemented syscache, table, and function call support for collations ✎
- Added support for PostgreSQL collation handling in function calls, enabling explicit collation specification via named arguments
- Implemented syscache and table catalog support for pg_collation system table to provide complete catalog information
- Enhanced type annotation and runtime compilation to properly handle collation OIDs and validate collation names
- Introduced ICU locale collation support with stable OID assignment based on locale position in generated catalog
- Added comprehensive test coverage for collation functionality including standard and ICU locales, collation validation, and error cases
- Extended SQL parsing to support COLLATE clauses and proper collation propagation in function calls
<a href="https://nda.ya.ru/t/qa0kX64r7DqvtN"><font size="2">Autodescription by Yandex Code Assistant</font></a>
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