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= New Features
* A Database#rename_enum_value method has been added to the pg_enum
extension. It is supported on PostgreSQL 10+:
DB.rename_enum_value(:enum_type, 'old_name', 'new_name')
= Other Improvements
* The performance of row fetching and type conversion in the
sqlanywhere adapter has been improved.
* The performance of row fetching in the sqlite adapter has been
improved.
* Calling Database#drop_table now drops any constraint validations
metadata for the table if using the constraint_validations
extension. However, modifying the table using Database#alter_table
does not affect the constraint validations metadata.
* The sqlite adapter when used with ruby-sqlite3 1.4.0+ now uses
SQLite extended result codes for a more accurate determination of
specific database errors types.
* Performance for typecasting to decimal and floats has been improved
slightly.
* Performance when merging hashes has been improved slightly.
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