Last Modified
2013-05-30 13:54:21 +0000
Requires

Description

The columns_introspection extension attempts to introspect the selected columns for a dataset before issuing a query. If it thinks it can guess correctly at the columns the query will use, it will return the columns without issuing a database query. This method is not fool-proof, it's possible that some databases will use column names that Sequel does not expect.

To attempt to introspect columns for a single dataset:

ds.extension(:columns_introspection)

To attempt to introspect columns for all datasets on a single database:

DB.extension(:columns_introspection)

To attempt to introspect columns for all datasets on all databases:

Sequel.extension :columns_introspection
Sequel::Dataset.introspect_all_columns