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This pull request significantly improves PostgreSQL array type handling and conversion in the `pgsql` driver, providing more accurate type mapping and conversion logic, especially for array types. It introduces comprehensive documentation, refactors conversion logic to use the `pq` package for array types, and adds extensive unit tests to ensure correctness and error handling. Additionally, minor enhancements and clarifications are made to upsert formatting and table field queries. ### PostgreSQL Array Type Handling and Conversion * Refactored `CheckLocalTypeForField` and `ConvertValueForLocal` methods in `contrib/drivers/pgsql/pgsql_convert.go` to accurately map PostgreSQL array types (such as `_int2`, `_int4`, `_int8`, `_float4`, `_float8`, `_bool`, `_varchar`, `_text`, `_char`, `_bpchar`, `_numeric`, `_decimal`, `_money`, `_bytea`) to their corresponding Go types, using the `pq` package for conversion. Added detailed documentation and mapping tables for supported types. [[1]](diffhunk://#diff-a3b1e68bfa29fbcfda7c703bbe875fa82e958f6c3ad942ef82193a9dd8ad67e2R46-R63) [[2]](diffhunk://#diff-a3b1e68bfa29fbcfda7c703bbe875fa82e958f6c3ad942ef82193a9dd8ad67e2L56-R103) [[3]](diffhunk://#diff-a3b1e68bfa29fbcfda7c703bbe875fa82e958f6c3ad942ef82193a9dd8ad67e2R112-R209) * Added comprehensive unit tests in `contrib/drivers/pgsql/pgsql_z_unit_convert_test.go` to verify type mapping and conversion for all supported array types, including error cases for invalid input. ### Utility and API Improvements * Added a new `Bools()` method to the `gvar.Var` type in `container/gvar/gvar_slice.go` for converting values to `[]bool`, with corresponding unit tests in `container/gvar/gvar_z_unit_slice_test.go`. [[1]](diffhunk://#diff-32e887e540e0170f785508d105cb794e4d54d854b53b6950973c80022973c490R11-R15) [[2]](diffhunk://#diff-01453eca4d4b3e35d07ca105cb924c6441d0cd9df6cbcc337a89832c8d53057fR24-R41) ### SQL Formatting and Documentation * Improved documentation and formatting in the upsert logic of `contrib/drivers/pgsql/pgsql_format_upsert.go` to clarify the use of `EXCLUDED` in PostgreSQL's `ON CONFLICT DO UPDATE`. * Enhanced readability of the table field query in `contrib/drivers/pgsql/pgsql_table_fields.go` by reformatting SQL and clarifying field extraction. --------- Co-authored-by: hailaz <739476267@qq.com> Co-authored-by: houseme <housemecn@gmail.com>