René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Support for automatic replacement scans","articleBody":"**Is your feature request related to a problem or challenge? Please describe what you are trying to do.**\n\nDuckDB has a replacement scan feature in the Python API that allows it to [directly access Python variables that are Arrow-based](https://duckdb.org/docs/stable/clients/python/data_ingestion#directly-accessing-dataframes-and-arrow-objects). \n\nThis would mean that you wouldn't necessarily need to perform a `register_dataframe` step in advance; you could just query a variable directly. This would also be temporary; it wouldn't persist the dataframe as a registered object in the session.\n\n**Describe the solution you'd like**\n\nIf a table name is not found among the registered\n\nIs there some way to implement an order of operations for finding tables with a certain name? I.e. inject some code so that if a table `x` isn't found already-registered, then it can evaluate whether the Python variable `x` is Arrow-like?\n\n**Describe alternatives you've considered**\nA clear and concise description of any alternative solutions or features you've considered.\n\n**Additional context**\n\nI could implement the Python side of this, but I don't know the DataFusion API well enough to know where to find the hooks or how to connect to them.","author":{"url":"https://github.com/kylebarron","@type":"Person","name":"kylebarron"},"datePublished":"2025-09-18T16:42:34.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":0},"url":"https://github.com/1244/datafusion-python/issues/1244"}