CREATE VIEW over a TINYBLOB column reports `ERR_CONVERTOR` but it actually creates a usable view in `polardbx-sql`

[123lpygithub]

polardbx-sql reports a CREATE VIEW failure for a minimal TINYBLOB projection, but the view object is nevertheless created successfully and remains visible and usable afterwards.
This is a concrete DDL state/return mismatch: the client receives an error, while the schema change has already committed.

polardbx-sql version: 5.4.19-SNAPSHOT

How to repeat:

DROP DATABASE IF EXISTS t1;
CREATE DATABASE t1;
USE t1;

CREATE TABLE t (
  c1 TINYBLOB
);

CREATE VIEW V AS
SELECT c1 FROM t;

SHOW CREATE VIEW V;

Observed behavior:
CREATE VIEW V AS SELECT c1 FROM t; returns:

ERR-CODE: [PXC-4602][ERR_CONVERTOR] convertor error:
Unsupported convert: [com.alibaba.polardbx.optimizer.core.datatype.Blob,java.lang.Integer]

But SHOW CREATE VIEW V; immediately succeeds and shows the created view definition.