Ecto.Migration.create

You're seeing just the function create, go back to Ecto.Migration module for more information.

create(index)

Creates one of the following:

an index
a table with only the :id primary key
a constraint

When reversing (in a change/0 running backwards), indexes are only dropped if they exist, and no errors are raised. To enforce dropping an index, use drop/1.

Examples

create index("posts", [:name])
create table("version")
create constraint("products", "price_must_be_positive", check: "price > 0")