MySQL Foreign Data Wrapper 2.8.0 release notes v2
Released: 26 May 2022
Enhancements, bug fixes, and other changes in MySQL Foreign Data Wrapper 2.8.0 include:
| Type | Description |
|---|---|
| Feature | Push down ORDER BY to remote MySQL servers: When possible, consider a path that adds the ORDER BY clause to the remote SQL to get an ordered result set from the foreign server. This helps with an efficient merge join. |
| Feature | Push down LIMIT/OFFSET to remote MySQL servers: Wherever applicable, perform LIMIT and OFFSET operations on the remote server. This reduces network traffic between local PostgreSQL and remote MySQL servers. |
| Enhancement | Add character_set option. Users can now set it to an appropriate value per MySQL database. |
| Enhancement | Add sql_mode option. MySQL server can operate in different SQL modes, this option allows it to match that up. |
| Bug Fix | Introduce import_enum_as_text IMPORT FOREIGN SCHEMA option. When true, mysql_fdw implicitly maps the ENUM column to a TEXT type to import the table successfully without any failure. |
| Bug Fix | Force correct type modifiers while converting MySQL value to PostgreSQL. |
| Bug Fix | Fix text column data truncation when reading very long data. |
| Bug Fix | Do not push aggregates with VARIADIC array as MySQL does not support them. |