jayzhan211 opened a new issue, #10207:
URL: https://github.com/apache/datafusion/issues/10207
### Is your feature request related to a problem or challenge?
Currently we can build struct table like this
```
statement ok
create table t as values (struct(1, 'a')), (struct(2, 'b'));
query ?
select * from t;
----
{c0: 1, c1: a}
{c0: 2, c1: b}
```
If we want to name them, we need to build with `named_struct`
```
statement ok
create table t as values (named_struct('number', 1, 'varchar', 'a')),
(named_struct('number', 2, 'varchar', 'b'));
query ?
select * from t;
----
{number: 1, varchar: a}
{number: 2, varchar: b}
```
I hope we can build the struct table with pre-defined type and name
```
statement error DataFusion error: This feature is not implemented:
Unsupported SQL type Custom\(ObjectName\(\[Ident \{ value: "struct",
quote_style: None \}\]\), \["n", "int", "s", "varchar"\]\)
create table t (s struct(n int, s varchar)) as values (struct(1, 'a')),
(struct(2, 'b'));
query ?
select * from t;
----
{n: 1, s: a}
{n: 2, s: b}
```
### Describe the solution you'd like
_No response_
### Describe alternatives you've considered
_No response_
### Additional context
_No response_
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