Method _eval

python/pathway/internals/table.py:2557–2568

Desugar expression and wrap it in given context.

(
        self, expression: expr.ColumnExpression, context: clmn.Context | None = None
    )

        return clmn.TableRestrictedRowwiseContext(self._id_column, self)

    def _eval(
        self, expression: expr.ColumnExpression, context: clmn.Context | None = None
    ) -> clmn.ColumnWithExpression:
        """Desugar expression and wrap it in given context."""
        if context is None:
            context = self._rowwise_context
        column = expression._column_with_expression_cls(
            context=context,
            universe=context.universe,
            expression=expression,
        )
        return column

    @classmethod
    def _from_schema(cls: type[TTable], schema: type[Schema]) -> TTable: