YQL-16277: Expand SqlCombine via LPartitionsByKeys

2026-07-15T08:59:35Z

#### Expand SqlCombine via LPartitionsByKeys ✎ - Replaced `PartitionsByKeys` with `LPartitionsByKeys` to enhance the SqlCombine expansion logic - Modified the lambda expression structure to directly use `partitionStream` parameter instead of intermediate `partitionList`, simplifying the stream processing pipeline - Updated the chopper handler to work directly with the stream input, improving efficiency and consistency in data processing - Adjusted canondata checksum due to structural changes in the generated query plan Autodescription by Yandex Code Assistant commit_hash:2b5dc46308ee7316727feefecffabfed91ebfef6

YQL-16277: Implement ExpandSqlCombine optimizer

2026-06-29T12:49:32Z

#### Implement SqlCombine optimizer and enhance ListJoinCore type checking ✎ - Introduce ExpandSqlCombine optimizer to handle SQL COMBINE operations, enabling efficient execution of combine operations with proper key handling and sorting - Refactor ListJoinCore type annotation logic to use tuples instead of structs for key types, improving type safety and consistency in multi-key scenarios - Add auxiliary constants for consistent naming of input prefixes and key members in join operations - Update MKQL compiler and type annotation components to support the new SqlCombine expansion and improved type checking - Enhance test coverage with new test cases for various SqlCombine scenarios including single key, multi-key, optional keys, and type mismatches - Adjust existing tests and canonical data to reflect the changes in type handling and naming conventions Autodescription by Yandex Code Assistant commit_hash:376f67bfed851d0e4f7ac354d22220ba4f4737e2

ydb/yql/essentials/core/yql_sql_combine_expander.cpp, branch main

YQL-16277: Expand SqlCombine via LPartitionsByKeys

YQL-16277: Implement ExpandSqlCombine optimizer