grundprinzip commented on code in PR #38723: URL: https://github.com/apache/spark/pull/38723#discussion_r1027093850
########## python/pyspark/sql/connect/dataframe.py: ########## @@ -124,6 +125,29 @@ def withPlan(cls, plan: plan.LogicalPlan, session: "RemoteSparkSession") -> "Dat def select(self, *cols: "ExpressionOrString") -> "DataFrame": return DataFrame.withPlan(plan.Project(self._plan, *cols), session=self._session) + def selectExpr(self, *expr: Union[str, List[str]]) -> "DataFrame": + """Projects a set of SQL expressions and returns a new :class:`DataFrame`. + + This is a variant of :func:`select` that accepts SQL expressions. + + .. versionadded:: 3.4.0 + + Returns + ------- + :class:`DataFrame` + A DataFrame with new/old columns transformed by expressions. + """ + sql_expr = [] + if len(expr) == 1 and isinstance(expr[0], list): + expr = expr[0] # type: ignore[assignment] + for element in expr: + if isinstance(element, str): + sql_expr.append(SQLExpression(element)) + else: + sql_expr.extend([SQLExpression(e) for e in element]) + + return DataFrame.withPlan(plan.Project(self._plan, *sql_expr), session=self._session) Review Comment: So this becomes an unresolved attribute and just works out of the box? -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org For additional commands, e-mail: reviews-h...@spark.apache.org