Don't return 8-bit signed integers for binary text data

Author: ayrton

__tests__/index.test.ts

@@ -629,6 +629,11 @@ describe('cast', () => {
   test('casts binary data to array of 8-bit unsigned integers', () => {
     expect(cast({ name: 'test', type: 'BLOB' }, '')).toEqual(new Uint8Array([]))
     expect(cast({ name: 'test', type: 'BLOB' }, 'Å')).toEqual(new Uint8Array([197]))
+    expect(cast({ name: 'test', type: 'VARBINARY' }, 'Å')).toEqual(new Uint8Array([197]))
+  })
+
+  test('casts binary text data to text', () => {
+    expect(cast({ name: 'test', type: 'VARBINARY', flags: 4225 }, 'table')).toEqual('table')
   })
 
   test('casts JSON string to JSON object', () => {

src/index.ts

@@ -407,13 +407,28 @@ export function cast(field: Field, value: string | null): any {
       return value
     case 'BLOB':
     case 'BIT':
-    case 'VARBINARY':
-    case 'BINARY':
     case 'GEOMETRY':
       return uint8Array(value)
+    case 'BINARY':
+    case 'VARBINARY':
+      return isText(field) ? value : uint8Array(value)
     case 'JSON':
       return value ? JSON.parse(decode(value)) : value
     default:
       return decode(value)
   }
 }
+
+enum Flags {
+  NONE = 0,
+  ISINTEGRAL = 256,
+  ISUNSIGNED = 512,
+  ISFLOAT = 1024,
+  ISQUOTED = 2048,
+  ISTEXT = 4096,
+  ISBINARY = 8192
+}
+
+function isText(field: Field): boolean {
+  return ((field.flags ?? 0) & Flags.ISTEXT) === Flags.ISTEXT
+}