AdamGS commented on code in PR #20071: URL: https://github.com/apache/datafusion/pull/20071#discussion_r3250391078
########## datafusion/functions/src/core/input_file_name.rs: ########## @@ -0,0 +1,90 @@ +// Licensed to the Apache Software Foundation (ASF) under one +// or more contributor license agreements. See the NOTICE file +// distributed with this work for additional information +// regarding copyright ownership. The ASF licenses this file +// to you under the Apache License, Version 2.0 (the +// "License"); you may not use this file except in compliance +// with the License. You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, +// software distributed under the License is distributed on an +// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY +// KIND, either express or implied. See the License for the +// specific language governing permissions and limitations +// under the License. + +//! [`InputFileNameFunc`]: Implementation of the `input_file_name` function. + +use arrow::datatypes::DataType; +use datafusion_common::{Result, ScalarValue, utils::take_function_args}; +use datafusion_doc::Documentation; +use datafusion_expr::{ + ColumnarValue, ScalarFunctionArgs, ScalarUDFImpl, Signature, Volatility, +}; +use datafusion_macros::user_doc; +use std::any::Any; + +#[user_doc( + doc_section(label = "Other Functions"), + description = r#"Returns the path of the input file that produced the current row. + +Note: file paths/URIs may be sensitive metadata depending on your environment. + +This function is intended to be rewritten at file-scan time (when the file is +known). If the input file is not known (for example, if this function is +evaluated outside a file scan, or was not pushed down into one), this function +returns NULL. +"#, + syntax_example = "input_file_name()", + sql_example = r#"```sql +SELECT input_file_name() FROM t; +```"# +)] +#[derive(Debug, PartialEq, Eq, Hash)] +pub struct InputFileNameFunc { + signature: Signature, +} + +impl Default for InputFileNameFunc { + fn default() -> Self { + Self::new() + } +} + +impl InputFileNameFunc { + pub fn new() -> Self { + Self { + signature: Signature::nullary(Volatility::Volatile), + } + } +} + +impl ScalarUDFImpl for InputFileNameFunc { + fn as_any(&self) -> &dyn Any { Review Comment: should probably rebase, this isn't part of the trait anymore IMO -- 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: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
