ralsei.task.add_columns¶

Module Contents¶

Classes¶

API¶

class ralsei.task.add_columns.AddColumnsTask¶

Bases: ralsei.task.base.TaskImpl

Base class for a task that adds columns to a table

All you have to do is call _prepare_columns() from within ralsei.task.TaskImpl.prepare().

output, _exists() and _delete() are implemented for you, leaving only the ralsei.task.TaskImpl._run() part

_table : ralsei.types.Table = None¶

_columns : list[ralsei.types.ColumnRendered] = None¶

_add_columns : ralsei.db_actions.AddColumns = None¶

_drop_columns : ralsei.db_actions.DropColumns = None¶

_prepare_columns(table: ralsei.graph.Resolves[ralsei.types.Table], columns: collections.abc.Sequence[ralsei.types.ColumnBase], *, if_not_exists: bool = False)¶

property output : Any¶

_exists(conn: ralsei.connection.ConnectionEnvironment) → bool¶

_delete(conn: ralsei.connection.ConnectionEnvironment)¶