Save a DB_Table as a data link

[radeusgd]

Similarly to #11294, we want to be able to save a specific DB_Table as a data link.

This should create a data link that will connect to the same database and then read the query that the DB_Table.to_sql returns, and reconstruct the DB_Table view (although it will have a different underlying structure - instead of all the IR used to construct the query it will just contain the SQL code using From_Spec.Query).

This behaves essentially like storing a VIEW for the query represented by the DB_Table.

If the underlying connection does not support saving as data link (e.g. SQLite), it should raise a user-friendly error.

[enso-bot]

Radosław Waśko reports a new STANDUP for yesterday (2024-10-17):

Progress: Working on saving queries. Thinking what to do with prepared statement interpolations. Implemented serialization of SQL_Statement and tests for it. Updated datalink schema. It should be finished by 2024-10-21.

Next Day: Next day I will be working on the same task. Add logic for constructing a table from SQL Statement, deserializing tables in data links. Add tests.

[enso-bot]

Radosław Waśko reports a new STANDUP for the provided date (2024-10-18):

Progress: Working on constructing table from SQL and integrating that with datalinks (parsing etc.). Simplifying datalink logic to single constructor. It should be finished by 2024-10-21.

Next Day: Next day I will be working on the same task. Add tests for Postgres, update other datalinks too and enable tests.

[enso-bot]

Radosław Waśko reports a new STANDUP for today (2024-10-21):

Progress: Added tests, finished implementation. Added feature detecting temporary tables in data link and warning about them. Put up the PR. It should be finished by 2024-10-21.

Next Day: Next day I will be working on the #9812 task. Switch to types work for a bit.