Rough version of most onlineHelper and basicDDLfn

CreateAsCompiler created for use by CreateA
Most necessary functions in BasicDDLFunctions and OnlineHelper are
constructed
TableDDL now parses the original statement into just the Select part of
the statement for the building of the operator plan
Tests have been build but haven’t been run yet
TODO: complete the construction of the operator tree for the select
statement during ConcurrentDML