fix(types): support encoding for string type cast (#2407)

Author: Marsup

test/tsc-build/strict-checks/typeCast.ts

@@ -27,13 +27,14 @@ import { access, sql } from '../promise/baseConnection.js';
       const type: string = field.type;
       const buffer: Buffer | null = field.buffer();
       const string: string | null = field.string();
+      const stringWithEncoding: string | null = field.string('utf-8');
       const geometry:
         | { x: number; y: number }
         | { x: number; y: number }[]
         | null = field.geometry();
 
       console.log(db, length, name, table, type);
-      console.log(buffer, string, geometry);
+      console.log(buffer, string, stringWithEncoding, geometry);
 
       return next();
     },
@@ -64,13 +65,14 @@ import { access, sql } from '../promise/baseConnection.js';
       const type: string = field.type;
       const buffer: Buffer | null = field.buffer();
       const string: string | null = field.string();
+      const stringWithEncoding: string | null = field.string('utf-8');
       const geometry:
         | { x: number; y: number }
         | { x: number; y: number }[]
         | null = field.geometry();
 
       console.log(db, length, name, table, type);
-      console.log(buffer, string, geometry);
+      console.log(buffer, string, stringWithEncoding, geometry);
 
       return next();
     },
@@ -101,13 +103,14 @@ import { access, sql } from '../promise/baseConnection.js';
       const type: string = field.type;
       const buffer: Buffer | null = field.buffer();
       const string: string | null = field.string();
+      const stringWithEncoding: string | null = field.string('utf-8');
       const geometry:
         | { x: number; y: number }
         | { x: number; y: number }[]
         | null = field.geometry();
 
       console.log(db, length, name, table, type);
-      console.log(buffer, string, geometry);
+      console.log(buffer, string, stringWithEncoding, geometry);
 
       return next();
     },
@@ -138,13 +141,14 @@ import { access, sql } from '../promise/baseConnection.js';
       const type: string = field.type;
       const buffer: Buffer | null = field.buffer();
       const string: string | null = field.string();
+      const stringWithEncoding: string | null = field.string('utf-8');
       const geometry:
         | { x: number; y: number }
         | { x: number; y: number }[]
         | null = field.geometry();
 
       console.log(db, length, name, table, type);
-      console.log(buffer, string, geometry);
+      console.log(buffer, string, stringWithEncoding, geometry);
 
       return next();
     },

typings/mysql/lib/parsers/typeCast.d.ts

@@ -43,7 +43,7 @@ type Field = Type & {
   db: string;
   table: string;
   name: string;
-  string: () => string | null;
+  string: (encoding?: BufferEncoding | string | undefined) => string | null;
   buffer: () => Buffer | null;
   geometry: () => Geometry | Geometry[] | null;
 };