Fix a mismatch between the type of jdbc query result and the datatype

[Zhumengze]

Proposed changes

Issue Number: close #xxx

Problem Summary:

The value type obtained by rs.getObject(index + 1) is inconsistent with the field type obtained by flink Context, resulting in a conversion failure in encapsulating flink RowData. For example, the java type corresponding to TINYINT is Java.lang. Byte, while the java type obtained by rs.getObject(index + 1) is Java.lang. Integer, which has a type conversion problem. SMALLINT had the same problem.

Checklist(Required)

1. Does it affect the original behavior: (Yes/No/I Don't know)
   NO
2. Has unit tests been added: (Yes/No/No Need)
   NO
3. Has document been added or modified: (Yes/No/No Need)
   NO
4. Does it need to update dependencies: (Yes/No)
   NO
5. Are there any changes that cannot be rolled back: (Yes/No)
   NO

Further comments

If this is a relatively large or complex change, kick off the discussion at [email protected] by explaining why you chose the solution you did and what alternatives you considered, etc...

[JNSimba]

Thank you for your contribution. Could you add some test cases for this PR?

[Zhumengze]

@JNSimba No problem,I will submit a new pr later.