Add DESCRIBE statement

[pythonbrad]

resolve #1113

gluesql> CREATE TABLE person(id INT PRIMARY KEY, name TEXT, age INT NOT NULL, alive BOOLEAN DEFAULT true);
gluesql> DESCRIBE person;

Field	Type	Null	Key	Default
id	INT	false	PRIMARY KEY
name	TEXT	true
age	INT	false
alive	BOOLEAN	true		TRUE

[pythonbrad]

Auto-increment is not yet implemented in GlueSQL, but I have included the extra column for it.

[devgony]

Currently we don't have any fields to show on extra.
Looks like it would be better to remove extra.

[devgony]

It would be better to wrap verbose tuple with struct like..

struct ExplainTableRow {
   name: String,
   data_type: DataType,
   nullable: bool,
   key: String,
   default: String,
}

[pythonbrad]

@devgony , I applied your reviews

[devgony]

Thank you for quick commit.
Can you do the cargo fmt and push again?

[pythonbrad]

Thank you for quick commit.

Can you do the cargo fmt and push again?

Please, can you check the pkg/javascript/web/src/payload.rs ? The json result

[coveralls]

Pull Request Test Coverage Report for Build 6310736809

• 150 of 151 (99.34%) changed or added relevant lines in 7 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 99.187%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
core/src/executor/execute.rs	17	18	94.44%

Totals
Change from base Build 6282500644:	0.0%
Covered Lines:	50388
Relevant Lines:	50801

---

💛 - Coveralls

[devgony]

Thank you for quick commit.
Can you do the cargo fmt and push again?

Please, can you check the pkg/javascript/web/src/payload.rs ? The json result

It seems like working well on web as well 👍

[pythonbrad]

hi @panarch
is the pr ok ?