datafusion_common/utils/
string_utils.rs

1// Licensed to the Apache Software Foundation (ASF) under one
2// or more contributor license agreements.  See the NOTICE file
3// distributed with this work for additional information
4// regarding copyright ownership.  The ASF licenses this file
5// to you under the Apache License, Version 2.0 (the
6// "License"); you may not use this file except in compliance
7// with the License.  You may obtain a copy of the License at
8//
9//   http://www.apache.org/licenses/LICENSE-2.0
10//
11// Unless required by applicable law or agreed to in writing,
12// software distributed under the License is distributed on an
13// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
14// KIND, either express or implied.  See the License for the
15// specific language governing permissions and limitations
16// under the License.
17
18//! Utilities for working with strings
19
20use arrow::array::{Array, AsArray};
21use arrow::datatypes::DataType;
22
23/// Convenient function to convert an Arrow string array to a vector of strings
24pub fn string_array_to_vec(array: &dyn Array) -> Vec<Option<&str>> {
25    match array.data_type() {
26        DataType::Utf8 => array.as_string::<i32>().iter().collect(),
27        DataType::LargeUtf8 => array.as_string::<i64>().iter().collect(),
28        DataType::Utf8View => array.as_string_view().iter().collect(),
29        _ => unreachable!(),
30    }
31}
datafusion_common/utils/string_utils.rs

datafusion_common/utils/
string_utils.rs
