crate/crate — pull request #1209 by mfussenegger (2014-09-29 12:19:58+00:00)
Title: add getSafe to functions; rename getColumnInfo to getReferenceInfo

Moves the null check logic from the AbstractDataAnalysis into the Functions
class as both getFunctionInfo and getFunctionImplementation will probably be
removed in the upcoming relations change.

Renamed getColumnInfo to getReferenceInfo as it actually returns a
ReferenceInfo.