TODO

Schema features

Support table constraints
Support enums
Support views
Support materialized views
Support ON CONFLICT
Support additional DDL statements
Support functions
Support exclusion constraints
Support ON DELETE/ON UPDATE of fkey constraints

Query features

Support Non-inner joins
Support CTEs
Support recursive CTEs
Support DISTINCT (ON)
Support HAVING
Support window queries
Support subquery expressions (EXISTS/IN/NOT IN/ANY/SOME/ALL)
Support row comparisons (IN/NOT IN/ANY/SOME/ALL)
Support TRUNCATE

Internal features

Disk persistence
WAL logging
Networking
Multiple clients
Transactions
Triggers

Tech debt

Rewrite non-null types into constraints
Non-hack planning for merge joins
Implement Mark+Restore on indexes directly
Break Node iface into optional components
Combine alias and projection nodes (if possible)