ydb/yql/essentials/providers, branch main

YQL-21315: Block variant item implementation

2026-07-17T15:57:11Z

BlockVariantItem implementation commit_hash:f35a597dee3dc67ebc5be599ed9d379d7ad57802

YQL-20804: Fix Decimal type conversion

2026-07-15T11:10:17Z

#### `YQL-20804`: Fix Decimal type conversion ✎ - Enhanced type annotation system to properly handle Decimal type conversions by introducing a new `EDecimalConversionMode` configuration option that allows controlling how common types are computed for Decimal values - Modified core type annotation functions to accept and utilize a `TTypeAnnotationContext` parameter, ensuring consistent type resolution across join operations and type conversions - Updated join-related functions and peephole optimizations to pass type context information, fixing issues with Decimal type compatibility during join key processing - Added comprehensive unit tests to verify Decimal type conversion behavior and ensure proper casting between different Decimal precisions and scales - Extended type annotation infrastructure to support both strict and lenient Decimal conversion modes, improving error handling and type inference for edge cases Autodescription by Yandex Code Assistant commit_hash:f4ec01ad79cb2f3219b529118380747828075e6b

YQL-21404 implemented syscache, table, func call

2026-07-14T14:57:28Z

#### `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 Autodescription by Yandex Code Assistant commit_hash:e9a32cc848bef7b68b4f57f71a1f5f69e0de9653

YQL-21315: Implement block variant comp node

2026-07-14T09:17:28Z

#### Implement Block Variant Computational Node ✎ - Introduces a new computational node for handling variant types in block operations, supporting both tuple and struct variants - Adds type annotation and runtime support for the new variant node with proper type checking and validation - Implements block-level variant operations that can select specific alternatives from variant types based on index or member name - Includes comprehensive unit tests and integration tests covering both tuple and struct variant scenarios - Updates runtime version to 81 and integrates the new node into the compilation and execution pipeline - Provides SQL syntax support for variant operations through the `Variant` function with appropriate type handling Autodescription by Yandex Code Assistant commit_hash:a07c1a365815a271cdd34958369156fd542fd5cc

Fix YQL native YT type flags: Complete Edition

2026-07-10T13:22:51Z

- Cherry-picked original "Fix YQL native YT type flags" and "Fix YT native types handling for aux columns - 2" with additional fixes (previously reverted) - Enforce mandatory usage of the type v3 schema for output tables - Major refactoring of Skiff encoder/decoder to fix non-complex nativeness support commit_hash:2b4241624a261a690c916a7386b84cb3d483a373

YQL-21101: Make ToFlow dependent args required

2026-07-10T12:33:54Z

commit_hash:bc73ed520d5d4ef210b03b983720e6e8a6996db5

YQL-21370: Support TCoreAttr::Args at SqlCore

2026-07-10T10:56:42Z

#### Support TCoreAttr::Args at SqlCore ✎ - Introduces support for extended SQL flags with arguments in the SqlCore configuration, allowing flags to carry additional parameters for more granular control - Refactors internal flag handling to use a map-based structure instead of a simple set, enabling storage and processing of flag arguments - Updates module resolver and translation settings parsing to work with the new extended flag format, ensuring proper flag propagation and application - Adds new infrastructure for parsing and managing SQL translation flags with arguments, including dedicated parsing logic for specific flag types - Maintains backward compatibility while enabling new functionality for SQL flag configuration through gateways and command-line options Autodescription by Yandex Code Assistant commit_hash:8b26974b3bf4ff2bdaf76715cbb210a8a15e1dad

Use credentials for downloads across UDF index & UDF meta task - second attempt

2026-07-08T15:23:31Z

- Cherry-pick of original "Use credentials for downloads across UDF index & UDF meta task" - Fix wrapping up UDF resolver with QPlayer adapter commit_hash:df724df8c5b821f4c30ebf4359730107a6dbc253

YQL-21315: Block way implementation

2026-07-07T13:59:11Z

#### Block Way Implementation ✎ - Implemented the `BlockWay` function to extract variant type information from block inputs, returning either tuple indices or struct member names - Added type annotation support for `BlockWay` operations with proper handling of optional variants and different underlying types - Introduced computation node implementation for `BlockWay` that processes both tuple and struct variants efficiently - Enhanced runtime version handling to support the new `BlockWay` functionality with version 80 - Added comprehensive unit tests covering various scenarios including tuple variants, struct variants, optional variants, and edge cases - Integrated `BlockWay` into the SQL parser and program builder with proper type inference and validation - Added SQL format tests and canonical data for tuple and struct variant scenarios with and without optionality Autodescription by Yandex Code Assistant commit_hash:70a82f5d13a7c1499a9ad88fc5d9b079e352d7ef

KIKIMR-25621: Introduce multi-column statistics

2026-07-07T09:26:27Z

#### Introduce multi-column statistics support ✎ - Adds support for defining multi-column statistics in table schemas, allowing users to specify statistics for combinations of columns rather than individual columns - Introduces new SQL syntax for CREATE TABLE and ALTER TABLE statements to declare statistics with optional type specifications - Implements validation for statistics definitions, ensuring column references are valid and names are unique - Extends the query processing pipeline to handle statistics declarations during table creation and modification operations - Updates syntax highlighting and parsing rules to recognize the new statistics keyword and related constructs - Adds comprehensive unit tests covering various statistics scenarios including multi-column definitions, type specifications, and validation rules Autodescription by Yandex Code Assistant commit_hash:5ca3f8721d3e3660f2bb890c1408e420cf7c3e81