Enhancements:

• Add support for INSERT, DELETE and UPDATE. This is a major rewrite that might cause some destabilization in existing functionality.
• Add new column option “key” to indicate primary key columns. This is needed for UPDATE and DELETE.
• Add new table option “readonly” to forbid data modifying statements.
• Improved transaction handling for data modifying statements. COMMIT, ROLLBACK and SAVEPOINT will work as expected.
• Add paths for Oracle 12.1 to the Makefile. Patch by Guillaume Lelarge.

Bugfixes:

• Don't try to push down the division operator. That would produce incorrect results for numeric data types.