vscode improvements

[herenickname]

Thanks for the plugin, it's awesome, I hope you continue to support it.

@xialvjun @darky I don't know exactly which side this process takes place on (vscode or typescript plugin) but I would really like that when writing a query with a specific table (FROM users) I would get the columns of particular table, not from others.

Got: Expected:

It would be very cool to have autocomplete for columns when writing queries like

SELECT users.id
             ^^ - show available columns of users table here
FROM users

And while writing queries like

SELECT 
       ^^ - show available columns of users table here
FROM users

without specifying a table (take from "FROM" sql part)