chore: extract static invoke expressions to folders based on spark grouping

native/spark-expr/src/comet_scalar_funcs.rs

@@ -20,9 +20,10 @@ use crate::scalar_funcs::hash_expressions::{
 };
 use crate::scalar_funcs::{
     spark_ceil, spark_date_add, spark_date_sub, spark_decimal_div, spark_floor, spark_hex,
-    spark_isnan, spark_make_decimal, spark_murmur3_hash, spark_read_side_padding, spark_round,
-    spark_unhex, spark_unscaled_value, spark_xxhash64, SparkChrFunc,
+    spark_isnan, spark_make_decimal, spark_murmur3_hash, spark_round, spark_unhex,
+    spark_unscaled_value, spark_xxhash64, SparkChrFunc,
 };
+use crate::spark_read_side_padding;
 use arrow_schema::DataType;
 use datafusion_common::{DataFusionError, Result as DataFusionResult};
 use datafusion_expr::registry::FunctionRegistry;

native/spark-expr/src/lib.rs

@@ -42,7 +42,9 @@ mod list;
 mod regexp;
 pub mod scalar_funcs;
 mod schema_adapter;
+mod static_invoke;
 pub use schema_adapter::SparkSchemaAdapterFactory;
+pub use static_invoke::*;
 
 pub mod spark_hash;
 mod stddev;

native/spark-expr/src/scalar_funcs.rs

@@ -20,25 +20,23 @@ use arrow::datatypes::IntervalDayTime;
 use arrow::{
     array::{
         ArrayRef, AsArray, Decimal128Builder, Float32Array, Float64Array, Int16Array, Int32Array,
-        Int64Array, Int64Builder, Int8Array, OffsetSizeTrait,
+        Int64Array, Int64Builder, Int8Array,
     },
     datatypes::{validate_decimal_precision, Decimal128Type, Int64Type},
 };
-use arrow_array::builder::{GenericStringBuilder, IntervalDayTimeBuilder};
+use arrow_array::builder::IntervalDayTimeBuilder;
 use arrow_array::types::{Int16Type, Int32Type, Int8Type};
 use arrow_array::{Array, ArrowNativeTypeOp, BooleanArray, Datum, Decimal128Array};
 use arrow_schema::{ArrowError, DataType, DECIMAL128_MAX_PRECISION};
 use datafusion::physical_expr_common::datum;
 use datafusion::{functions::math::round::round, physical_plan::ColumnarValue};
 use datafusion_common::{
-    cast::as_generic_string_array, exec_err, internal_err, DataFusionError,
-    Result as DataFusionResult, ScalarValue,
+    exec_err, internal_err, DataFusionError, Result as DataFusionResult, ScalarValue,
 };
 use num::{
     integer::{div_ceil, div_floor},
     BigInt, Signed, ToPrimitive,
 };
-use std::fmt::Write;
 use std::{cmp::min, sync::Arc};
 
 mod unhex;
@@ -390,57 +388,6 @@ pub fn spark_round(
     }
 }
 
-/// Similar to DataFusion `rpad`, but not to truncate when the string is already longer than length
-pub fn spark_read_side_padding(args: &[ColumnarValue]) -> Result<ColumnarValue, DataFusionError> {
-    match args {
-        [ColumnarValue::Array(array), ColumnarValue::Scalar(ScalarValue::Int32(Some(length)))] => {
-            match array.data_type() {
-                DataType::Utf8 => spark_read_side_padding_internal::<i32>(array, *length),
-                DataType::LargeUtf8 => spark_read_side_padding_internal::<i64>(array, *length),
-                // TODO: handle Dictionary types
-                other => Err(DataFusionError::Internal(format!(
-                    "Unsupported data type {other:?} for function read_side_padding",
-                ))),
-            }
-        }
-        other => Err(DataFusionError::Internal(format!(
-            "Unsupported arguments {other:?} for function read_side_padding",
-        ))),
-    }
-}
-
-fn spark_read_side_padding_internal<T: OffsetSizeTrait>(
-    array: &ArrayRef,
-    length: i32,
-) -> Result<ColumnarValue, DataFusionError> {
-    let string_array = as_generic_string_array::<T>(array)?;
-    let length = 0.max(length) as usize;
-    let space_string = " ".repeat(length);
-
-    let mut builder =
-        GenericStringBuilder::<T>::with_capacity(string_array.len(), string_array.len() * length);
-
-    for string in string_array.iter() {
-        match string {
-            Some(string) => {
-                // It looks Spark's UTF8String is closer to chars rather than graphemes
-                // https://stackoverflow.com/a/46290728
-                let char_len = string.chars().count();
-                if length <= char_len {
-                    builder.append_value(string);
-                } else {
-                    // write_str updates only the value buffer, not null nor offset buffer
-                    // This is convenient for concatenating str(s)
-                    builder.write_str(string)?;
-                    builder.append_value(&space_string[char_len..]);
-                }
-            }
-            _ => builder.append_null(),
-        }
-    }
-    Ok(ColumnarValue::Array(Arc::new(builder.finish())))
-}
-
 // Let Decimal(p3, s3) as return type i.e. Decimal(p1, s1) / Decimal(p2, s2) = Decimal(p3, s3).
 // Conversely, Decimal(p1, s1) = Decimal(p2, s2) * Decimal(p3, s3). This means that, in order to
 // get enough scale that matches with Spark behavior, it requires to widen s1 to s2 + s3 + 1. Since

native/spark-expr/src/static_invoke/char_varchar_utils/mod.rs

@@ -0,0 +1,20 @@
+// 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.
+
+mod read_side_padding;
+
+pub use read_side_padding::spark_read_side_padding;

native/spark-expr/src/static_invoke/char_varchar_utils/read_side_padding.rs

@@ -0,0 +1,76 @@
+// 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.
+
+use arrow::array::{ArrayRef, OffsetSizeTrait};
+use arrow_array::builder::GenericStringBuilder;
+use arrow_array::Array;
+use arrow_schema::DataType;
+use datafusion::physical_plan::ColumnarValue;
+use datafusion_common::{cast::as_generic_string_array, DataFusionError, ScalarValue};
+use std::fmt::Write;
+use std::sync::Arc;
+
+/// Similar to DataFusion `rpad`, but not to truncate when the string is already longer than length
+pub fn spark_read_side_padding(args: &[ColumnarValue]) -> Result<ColumnarValue, DataFusionError> {
+    match args {
+        [ColumnarValue::Array(array), ColumnarValue::Scalar(ScalarValue::Int32(Some(length)))] => {
+            match array.data_type() {
+                DataType::Utf8 => spark_read_side_padding_internal::<i32>(array, *length),
+                DataType::LargeUtf8 => spark_read_side_padding_internal::<i64>(array, *length),
+                // TODO: handle Dictionary types
+                other => Err(DataFusionError::Internal(format!(
+                    "Unsupported data type {other:?} for function read_side_padding",
+                ))),
+            }
+        }
+        other => Err(DataFusionError::Internal(format!(
+            "Unsupported arguments {other:?} for function read_side_padding",
+        ))),
+    }
+}
+
+fn spark_read_side_padding_internal<T: OffsetSizeTrait>(
+    array: &ArrayRef,
+    length: i32,
+) -> Result<ColumnarValue, DataFusionError> {
+    let string_array = as_generic_string_array::<T>(array)?;
+    let length = 0.max(length) as usize;
+    let space_string = " ".repeat(length);
+
+    let mut builder =
+        GenericStringBuilder::<T>::with_capacity(string_array.len(), string_array.len() * length);
+
+    for string in string_array.iter() {
+        match string {
+            Some(string) => {
+                // It looks Spark's UTF8String is closer to chars rather than graphemes
+                // https://stackoverflow.com/a/46290728
+                let char_len = string.chars().count();
+                if length <= char_len {
+                    builder.append_value(string);
+                } else {
+                    // write_str updates only the value buffer, not null nor offset buffer
+                    // This is convenient for concatenating str(s)
+                    builder.write_str(string)?;
+                    builder.append_value(&space_string[char_len..]);
+                }
+            }
+            _ => builder.append_null(),
+        }
+    }
+    Ok(ColumnarValue::Array(Arc::new(builder.finish())))
+}

native/spark-expr/src/static_invoke/mod.rs

@@ -0,0 +1,20 @@
+// 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.
+
+mod char_varchar_utils;
+
+pub use char_varchar_utils::spark_read_side_padding;