[Bug] Show view stmt report error when view references invalid table

[xy720]

Describe the bug
Show view stmt report error when view references invalid table.

To Reproduce
Steps to reproduce the behavior:

1、create two tables.

CREATE TABLE `test1` (
  `a` int(11) NOT NULL COMMENT "",
  `b` int(11) NOT NULL COMMENT ""
) ENGINE=OLAP
UNIQUE KEY(`a`)
DISTRIBUTED BY HASH(`a`) BUCKETS 8

CREATE TABLE `test2` (
  `c` int(11) NOT NULL COMMENT "",
  `d` int(11) NOT NULL COMMENT ""
) ENGINE=OLAP
UNIQUE KEY(`c`)
DISTRIBUTED BY HASH(`c`) BUCKETS 8

2、create view reference table test1.

create view v_test1 as select a, b from test1 limit 1;

3、drop table test1.

drop table test1;

4、show view from test2.

show view from test2;

Expected behavior
Get the result of show view

Screenshots
Error report: unknown table test1