[Feature][Transform] support boolean type for sql transform

Author: hawk9821

seatunnel-transforms-v2/src/main/java/org/apache/seatunnel/transform/sql/zeta/functions/SystemFunction.java

@@ -185,15 +185,15 @@ public static Object castAs(List<Object> args) {
                     } else {
                         throw new TransformException(
                                 CommonErrorCodeDeprecated.UNSUPPORTED_OPERATION,
-                                String.format("Unsupported CAST AS Boolean: %s", v2));
+                                String.format("Unsupported CAST AS Boolean: %s", v1));
                     }
                 } else if (v1 instanceof String) {
                     if (Arrays.asList("TRUE", "FALSE").contains(v1.toString().toUpperCase())) {
                         return Boolean.parseBoolean(v1.toString());
                     } else {
                         throw new TransformException(
                                 CommonErrorCodeDeprecated.UNSUPPORTED_OPERATION,
-                                String.format("Unsupported CAST AS Boolean: %s", v2));
+                                String.format("Unsupported CAST AS Boolean: %s", v1));
                     }
                 } else if (v1 instanceof Boolean) {
                     return v1;