SQL Query Views

[trueqbit]

Views in SQL are virtual tables based on the result-set of a SELECT statement, also known as query views.

With sqlite_orm, views are defined using make_view() which leverages C++ reflection to automatically map columns from the SELECT statement to struct fields.

SQL views created with make_view() don't require explicit column definitions - the columns are automatically determined from the view's object type through reflection.

struct HighEarner {
    int64 id;
    std::string name;
    double salary;
};

make_view<HighEarner>(
    "high_earners",
    select(columns(&Employee::id, &Employee::name, &Employee::salary), where(c(&Employee::salary) > 0.0)))

Resolves the following discussions and tickets:

• Can there be support for creating views in sqlite_orm? #968
• Are views now supported? #1437
• Using views #306
• Is there support for sqlite *view* in sqlite_orm? #1438

Note: There are no tests executed yet as no github action platform (Linux Ubuntu) provides gcc-16 binaries. However I tested the "view" example and unit tests in a local Windows Subsystem for Linux (WSL) environment.