This is our fork, so it should read like it. `import datastore_orm` instead of
`from infi.clickhouse_orm import ...`: `infi` was the original vendor's org
namespace, and carrying someone else's org name through every import in the
consuming codebase is not a fork, it is a vendored copy that never got renamed.
The `infi` namespace package is gone entirely (src/infi/__init__.py with it),
the distribution is `datastore-orm`, and the metadata points at Hanzo rather
than at the upstream repo and author.
NOT renamed, deliberately: the migration history tables are still
`infi_clickhouse_orm_migrations`. That name is persisted state — 448 rows in
production key off it — so changing it is a data migration, not a rename. Doing
it carelessly reproduces the exact failure this fork just hit, where a package
rename orphaned the history and silently blocked every migration.
- Rename `Model.readonly` to `Model._readonly` to prevent collision with a column that has the same name
- The `field_names` argument to `Model.to_tsv` is now mandatory
2. Added attribute server_version to Database class
3. Changed Engine.create_table_sql(), Engine.drop_table_sql(), Model.create_table_sql(), Model.drop_table_sql() parameter to db from db_name
1) Divided readonly and system flags of Field model. Readonly flag only restricts insert operations, while system flag restricts also create and drop table operations
2) Added Merge engine and tests for it
3) Added docs for Merge engine
4) Added opportunity to make Field readonly. This is useful for "virtual" columns (https://clickhouse.yandex/docs/en/single/index.html#virtual-columns)
zeekay
Itai Shirav