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Move repeat, replace, split_part to datafusion_functions (apache#9784)
* Fix to_timestamp benchmark * Remove reference to simd and nightly build as simd is no longer an available feature in DataFusion and building with nightly may not be a good recommendation when getting started. * Fixed missing trim() function. * Move repeat, replace, split_part to datafusion_functions
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,144 @@ | ||
| // 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. | ||
|
|
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| use std::any::Any; | ||
| use std::sync::Arc; | ||
|
|
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| use arrow::array::{ArrayRef, GenericStringArray, OffsetSizeTrait}; | ||
| use arrow::datatypes::DataType; | ||
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| use datafusion_common::cast::{as_generic_string_array, as_int64_array}; | ||
| use datafusion_common::{exec_err, Result}; | ||
| use datafusion_expr::TypeSignature::*; | ||
| use datafusion_expr::{ColumnarValue, Volatility}; | ||
| use datafusion_expr::{ScalarUDFImpl, Signature}; | ||
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| use crate::string::common::*; | ||
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| #[derive(Debug)] | ||
| pub(super) struct RepeatFunc { | ||
| signature: Signature, | ||
| } | ||
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| impl RepeatFunc { | ||
| pub fn new() -> Self { | ||
| use DataType::*; | ||
| Self { | ||
| signature: Signature::one_of( | ||
| vec![Exact(vec![Utf8, Int64]), Exact(vec![LargeUtf8, Int64])], | ||
| Volatility::Immutable, | ||
| ), | ||
| } | ||
| } | ||
| } | ||
|
|
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| impl ScalarUDFImpl for RepeatFunc { | ||
| fn as_any(&self) -> &dyn Any { | ||
| self | ||
| } | ||
|
|
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| fn name(&self) -> &str { | ||
| "repeat" | ||
| } | ||
|
|
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| fn signature(&self) -> &Signature { | ||
| &self.signature | ||
| } | ||
|
|
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| fn return_type(&self, arg_types: &[DataType]) -> Result<DataType> { | ||
| utf8_to_str_type(&arg_types[0], "repeat") | ||
| } | ||
|
|
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| fn invoke(&self, args: &[ColumnarValue]) -> Result<ColumnarValue> { | ||
| match args[0].data_type() { | ||
| DataType::Utf8 => make_scalar_function(repeat::<i32>, vec![])(args), | ||
| DataType::LargeUtf8 => make_scalar_function(repeat::<i64>, vec![])(args), | ||
| other => exec_err!("Unsupported data type {other:?} for function repeat"), | ||
| } | ||
| } | ||
| } | ||
|
|
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| /// Repeats string the specified number of times. | ||
| /// repeat('Pg', 4) = 'PgPgPgPg' | ||
| fn repeat<T: OffsetSizeTrait>(args: &[ArrayRef]) -> Result<ArrayRef> { | ||
| let string_array = as_generic_string_array::<T>(&args[0])?; | ||
| let number_array = as_int64_array(&args[1])?; | ||
|
|
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| let result = string_array | ||
| .iter() | ||
| .zip(number_array.iter()) | ||
| .map(|(string, number)| match (string, number) { | ||
| (Some(string), Some(number)) => Some(string.repeat(number as usize)), | ||
| _ => None, | ||
| }) | ||
| .collect::<GenericStringArray<T>>(); | ||
|
|
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| Ok(Arc::new(result) as ArrayRef) | ||
| } | ||
|
|
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| #[cfg(test)] | ||
| mod tests { | ||
| use arrow::array::{Array, StringArray}; | ||
| use arrow::datatypes::DataType::Utf8; | ||
|
|
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| use datafusion_common::Result; | ||
| use datafusion_common::ScalarValue; | ||
| use datafusion_expr::{ColumnarValue, ScalarUDFImpl}; | ||
|
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| use crate::string::common::test::test_function; | ||
| use crate::string::repeat::RepeatFunc; | ||
|
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| #[test] | ||
| fn test_functions() -> Result<()> { | ||
| test_function!( | ||
| RepeatFunc::new(), | ||
| &[ | ||
| ColumnarValue::Scalar(ScalarValue::Utf8(Some(String::from("Pg")))), | ||
| ColumnarValue::Scalar(ScalarValue::Int64(Some(4))), | ||
| ], | ||
| Ok(Some("PgPgPgPg")), | ||
| &str, | ||
| Utf8, | ||
| StringArray | ||
| ); | ||
|
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| test_function!( | ||
| RepeatFunc::new(), | ||
| &[ | ||
| ColumnarValue::Scalar(ScalarValue::Utf8(None)), | ||
| ColumnarValue::Scalar(ScalarValue::Int64(Some(4))), | ||
| ], | ||
| Ok(None), | ||
| &str, | ||
| Utf8, | ||
| StringArray | ||
| ); | ||
| test_function!( | ||
| RepeatFunc::new(), | ||
| &[ | ||
| ColumnarValue::Scalar(ScalarValue::Utf8(Some(String::from("Pg")))), | ||
| ColumnarValue::Scalar(ScalarValue::Int64(None)), | ||
| ], | ||
| Ok(None), | ||
| &str, | ||
| Utf8, | ||
| StringArray | ||
| ); | ||
|
|
||
| Ok(()) | ||
| } | ||
| } |
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