ocsigen/macaque — pull request #19 by gasche (2014-02-07 18:49:02+00:00)
Title: support unary operators (BREAKING CHANGE)

<:value< current_timestamp >> was previously special-cased in the
grammar to expand to Sql.Op.current_timestamp, while other identifiers
were interpreted as row names. I removed this special case and added
a `unit` value in SQL-land, so you can now write

<:value< current_timestamp () >>