Add support for index directions #657
Merged
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As discussed on the mailing list, this PR add support for specifying the index direction when creating a new index.
Most of the changes are pretty straightforward, but in the Tds and Postgres adapters, I did have to split up the old
index_expr/1into two different functions: one to compute the index expression and one to compute the include expression. Previously they shared the same function, but now that the domains of the functions are different I don't think they should.I also added two more types to
Ecto.Migrationto make sure the type of thecolumnsfield is correct.Finally, I chose to ignore the sorting direction when generating the index name, so that functionality also had to be slightly amended.