Method _filter

python/pathway/internals/table.py:578–585

(self, filter_expression: expr.ColumnExpression)

    @contextualized_operator
    def _filter(self, filter_expression: expr.ColumnExpression) -> Table[TSchema]:
        self._validate_expression(filter_expression)
        filtering_column = self._eval(filter_expression)
        assert self._universe == filtering_column.universe

        context = clmn.FilterContext(filtering_column, self._id_column)

        return self._table_with_context(context)

    @trace_user_frame
    @desugar