feat: BREAKING - Parse unknown types as string (#238)

Author: Soremwar

decode.ts

@@ -167,7 +167,11 @@ function decodeText(value: Uint8Array, typeOid: number): any {
     case Oid.timestamptz_array:
       return decodeDatetimeArray(strValue);
     default:
-      throw new Error(`Don't know how to parse column type: ${typeOid}`);
+      // A separate category for not handled values
+      // They might or might not be represented correctly as strings,
+      // returning them to the user as raw strings allows them to parse
+      // them as they see fit
+      return strValue;
   }
 }
 

tests/data_types.ts

@@ -890,3 +890,17 @@ testClient(async function circleArray() {
 
   assertEquals(rows[0][0][0], { point, radius });
 });
+
+testClient(async function unhandledType() {
+  const { rows: exists } = await CLIENT.queryArray(
+    "SELECT EXISTS (SELECT TRUE FROM PG_TYPE WHERE UPPER(TYPNAME) = 'DIRECTION')",
+  );
+  if (exists[0][0]) {
+    await CLIENT.queryArray("DROP TYPE DIRECTION;");
+  }
+  await CLIENT.queryArray("CREATE TYPE DIRECTION AS ENUM ( 'LEFT', 'RIGHT' )");
+  const { rows: result } = await CLIENT.queryArray("SELECT 'LEFT'::DIRECTION;");
+  await CLIENT.queryArray("DROP TYPE DIRECTION;");
+
+  assertEquals(result[0][0], "LEFT");
+});