cycquery.ops.Keep

class Keep(cols)

Bases: QueryOp

Keep only the specified columns in a table.

Parameters:

cols (Union[str, List[str]]) – The columns to keep.

Examples

>>> Keep("col1")(table)
>>> Keep(["col1", "col2"])(table)

Initialize the operation.

Methods

__call__(table)

Process the table.

Parameters:

table (Union[Select, Subquery, Table, DBTable]) – Table on which to perform the operation.

Returns:

Processed table.

Return type:

sqlalchemy.sql.selectable.Subquery

__init__(cols)

Initialize the operation.