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* impl map_keys * rename field name * add logic tests * one more * owned to clone * more tests * typo * impl * add logic tests * chore * add docs * trying to make prettier happy * Update scalar_functions.md Co-authored-by: Alex Huang <[email protected]> * reface signature * format docs * Update map_values.rs Co-authored-by: Alex Huang <[email protected]> --------- Co-authored-by: Alex Huang <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,102 @@ | ||
| // 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. | ||
|
|
||
| //! [`ScalarUDFImpl`] definitions for map_keys function. | ||
| use crate::utils::{get_map_entry_field, make_scalar_function}; | ||
| use arrow_array::{Array, ArrayRef, ListArray}; | ||
| use arrow_schema::{DataType, Field}; | ||
| use datafusion_common::{cast::as_map_array, exec_err, Result}; | ||
| use datafusion_expr::{ | ||
| ArrayFunctionSignature, ColumnarValue, ScalarUDFImpl, Signature, TypeSignature, | ||
| Volatility, | ||
| }; | ||
| use std::any::Any; | ||
| use std::sync::Arc; | ||
|
|
||
| make_udf_expr_and_func!( | ||
| MapKeysFunc, | ||
| map_keys, | ||
| map, | ||
| "Return a list of all keys in the map.", | ||
| map_keys_udf | ||
| ); | ||
|
|
||
| #[derive(Debug)] | ||
| pub(crate) struct MapKeysFunc { | ||
| signature: Signature, | ||
| } | ||
|
|
||
| impl MapKeysFunc { | ||
| pub fn new() -> Self { | ||
| Self { | ||
| signature: Signature::new( | ||
| TypeSignature::ArraySignature(ArrayFunctionSignature::MapArray), | ||
| Volatility::Immutable, | ||
| ), | ||
| } | ||
| } | ||
| } | ||
|
|
||
| impl ScalarUDFImpl for MapKeysFunc { | ||
| fn as_any(&self) -> &dyn Any { | ||
| self | ||
| } | ||
|
|
||
| fn name(&self) -> &str { | ||
| "map_keys" | ||
| } | ||
|
|
||
| fn signature(&self) -> &Signature { | ||
| &self.signature | ||
| } | ||
|
|
||
| fn return_type(&self, arg_types: &[DataType]) -> datafusion_common::Result<DataType> { | ||
| if arg_types.len() != 1 { | ||
| return exec_err!("map_keys expects single argument"); | ||
| } | ||
| let map_type = &arg_types[0]; | ||
| let map_fields = get_map_entry_field(map_type)?; | ||
| Ok(DataType::List(Arc::new(Field::new( | ||
| "item", | ||
| map_fields.first().unwrap().data_type().clone(), | ||
| false, | ||
| )))) | ||
| } | ||
|
|
||
| fn invoke(&self, args: &[ColumnarValue]) -> datafusion_common::Result<ColumnarValue> { | ||
| make_scalar_function(map_keys_inner)(args) | ||
| } | ||
| } | ||
|
|
||
| fn map_keys_inner(args: &[ArrayRef]) -> Result<ArrayRef> { | ||
| if args.len() != 1 { | ||
| return exec_err!("map_keys expects single argument"); | ||
| } | ||
|
|
||
| let map_array = match args[0].data_type() { | ||
| DataType::Map(_, _) => as_map_array(&args[0])?, | ||
| _ => return exec_err!("Argument for map_keys should be a map"), | ||
| }; | ||
|
|
||
| Ok(Arc::new(ListArray::new( | ||
| Arc::new(Field::new("item", map_array.key_type().clone(), false)), | ||
| map_array.offsets().clone(), | ||
| Arc::clone(map_array.keys()), | ||
| None, | ||
| ))) | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,102 @@ | ||
| // 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. | ||
|
|
||
| //! [`ScalarUDFImpl`] definitions for map_values function. | ||
| use crate::utils::{get_map_entry_field, make_scalar_function}; | ||
| use arrow_array::{Array, ArrayRef, ListArray}; | ||
| use arrow_schema::{DataType, Field}; | ||
| use datafusion_common::{cast::as_map_array, exec_err, Result}; | ||
| use datafusion_expr::{ | ||
| ArrayFunctionSignature, ColumnarValue, ScalarUDFImpl, Signature, TypeSignature, | ||
| Volatility, | ||
| }; | ||
| use std::any::Any; | ||
| use std::sync::Arc; | ||
|
|
||
| make_udf_expr_and_func!( | ||
| MapValuesFunc, | ||
| map_values, | ||
| map, | ||
| "Return a list of all values in the map.", | ||
| map_values_udf | ||
| ); | ||
|
|
||
| #[derive(Debug)] | ||
| pub(crate) struct MapValuesFunc { | ||
| signature: Signature, | ||
| } | ||
|
|
||
| impl MapValuesFunc { | ||
| pub fn new() -> Self { | ||
| Self { | ||
| signature: Signature::new( | ||
| TypeSignature::ArraySignature(ArrayFunctionSignature::MapArray), | ||
| Volatility::Immutable, | ||
| ), | ||
| } | ||
| } | ||
| } | ||
|
|
||
| impl ScalarUDFImpl for MapValuesFunc { | ||
| fn as_any(&self) -> &dyn Any { | ||
| self | ||
| } | ||
|
|
||
| fn name(&self) -> &str { | ||
| "map_values" | ||
| } | ||
|
|
||
| fn signature(&self) -> &Signature { | ||
| &self.signature | ||
| } | ||
|
|
||
| fn return_type(&self, arg_types: &[DataType]) -> datafusion_common::Result<DataType> { | ||
| if arg_types.len() != 1 { | ||
| return exec_err!("map_values expects single argument"); | ||
| } | ||
| let map_type = &arg_types[0]; | ||
| let map_fields = get_map_entry_field(map_type)?; | ||
| Ok(DataType::List(Arc::new(Field::new( | ||
| "item", | ||
| map_fields.last().unwrap().data_type().clone(), | ||
| true, | ||
| )))) | ||
| } | ||
|
|
||
| fn invoke(&self, args: &[ColumnarValue]) -> datafusion_common::Result<ColumnarValue> { | ||
| make_scalar_function(map_values_inner)(args) | ||
| } | ||
| } | ||
|
|
||
| fn map_values_inner(args: &[ArrayRef]) -> Result<ArrayRef> { | ||
| if args.len() != 1 { | ||
| return exec_err!("map_values expects single argument"); | ||
| } | ||
|
|
||
| let map_array = match args[0].data_type() { | ||
| DataType::Map(_, _) => as_map_array(&args[0])?, | ||
| _ => return exec_err!("Argument for map_values should be a map"), | ||
| }; | ||
|
|
||
| Ok(Arc::new(ListArray::new( | ||
| Arc::new(Field::new("item", map_array.value_type().clone(), true)), | ||
| map_array.offsets().clone(), | ||
| Arc::clone(map_array.values()), | ||
| None, | ||
| ))) | ||
| } |
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