chore(query): make soundex a mod

Author: sundy-li

src/query/functions-v2/src/scalars/mod.rs

@@ -22,6 +22,7 @@ mod boolean;
 mod control;
 mod datetime;
 mod math;
+mod soundex;
 mod string;
 mod string_multi_args;
 

src/query/functions-v2/src/scalars/soundex.rs

@@ -0,0 +1,44 @@
+// Copyright 2021 Datafuse Labs.
+//
+// Licensed 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.
+
+pub(crate) struct Soundex;
+
+impl Soundex {
+    #[inline(always)]
+    pub fn number_map(i: char) -> Option<u8> {
+        match i.to_ascii_lowercase() {
+            'b' | 'f' | 'p' | 'v' => Some(b'1'),
+            'c' | 'g' | 'j' | 'k' | 'q' | 's' | 'x' | 'z' => Some(b'2'),
+            'd' | 't' => Some(b'3'),
+            'l' => Some(b'4'),
+            'm' | 'n' => Some(b'5'),
+            'r' => Some(b'6'),
+            _ => Some(b'0'),
+        }
+    }
+
+    #[inline(always)]
+    pub fn is_drop(c: char) -> bool {
+        matches!(
+            c.to_ascii_lowercase(),
+            'a' | 'e' | 'i' | 'o' | 'u' | 'y' | 'h' | 'w'
+        )
+    }
+
+    // https://github.com/mysql/mysql-server/blob/3290a66c89eb1625a7058e0ef732432b6952b435/sql/item_strfunc.cc#L1919
+    #[inline(always)]
+    pub fn is_uni_alphabetic(c: char) -> bool {
+        ('a'..='z').contains(&c) || ('A'..='Z').contains(&c) || c as i32 >= 0xC0
+    }
+}

src/query/functions-v2/src/scalars/string.rs

@@ -30,6 +30,8 @@ use common_expression::Value;
 use common_expression::ValueRef;
 use itertools::izip;
 
+use super::soundex::Soundex;
+
 pub fn register(registry: &mut FunctionRegistry) {
     registry.register_passthrough_nullable_1_arg::<StringType, StringType, _, _>(
         "upper",
@@ -673,34 +675,3 @@ fn vectorize_string_to_string_2_arg(
         }
     }
 }
-
-struct Soundex;
-
-impl Soundex {
-    #[inline(always)]
-    fn number_map(i: char) -> Option<u8> {
-        match i.to_ascii_lowercase() {
-            'b' | 'f' | 'p' | 'v' => Some(b'1'),
-            'c' | 'g' | 'j' | 'k' | 'q' | 's' | 'x' | 'z' => Some(b'2'),
-            'd' | 't' => Some(b'3'),
-            'l' => Some(b'4'),
-            'm' | 'n' => Some(b'5'),
-            'r' => Some(b'6'),
-            _ => Some(b'0'),
-        }
-    }
-
-    #[inline(always)]
-    fn is_drop(c: char) -> bool {
-        matches!(
-            c.to_ascii_lowercase(),
-            'a' | 'e' | 'i' | 'o' | 'u' | 'y' | 'h' | 'w'
-        )
-    }
-
-    // https://github.com/mysql/mysql-server/blob/3290a66c89eb1625a7058e0ef732432b6952b435/sql/item_strfunc.cc#L1919
-    #[inline(always)]
-    fn is_uni_alphabetic(c: char) -> bool {
-        ('a'..='z').contains(&c) || ('A'..='Z').contains(&c) || c as i32 >= 0xC0
-    }
-}