Support batch `POST` (for columns for starters)

[soedirgo]

Feature request

Is your feature request related to a problem? Please describe.

Creating a table with multiple columns is pretty slow. Supporting batch POST would save us a couple round trips and remedy that.

Describe the solution you'd like

Make POST accept a list of objects in addition to a single object. e.g.:

POST /columns
[
  { "table_id": 123456, "name": "c1", "type": "text" },
  { "table_id": 123456, "name": "c2", "type": "text" }
]

[mahendraHegde]

@soedirgo I'd like to take a crack at it.
I understand that we need to support both object and array of objects in POST body of /columns, let me know if there anything else i need to be aware before starting.

[soedirgo]

Go for it @mahendraHegde!

we need to support both object and array of objects in POST body of /columns

Yup, ideally we also do the batch create in one db query, so we might also need to modify PostgresMetaColumns in lib (instead of just the server)

[mahendraHegde]

@soedirgo yes makes sense i will modify the PostgresMetaColumns.create to accept the array and return array. How ever i have a doubt,
since each object of the array will have table_id, so should we assume every row for the same table or are we supposed to support multiple table alter as well?

[mahendraHegde]

@soedirgo i have made the changes for single table batch update, since its my 1st contribution to this repo plz give your feedback, i will add & fix tests meanwhile.