/// Throws an Exception if an invalid payload specification is specified:
    /// there can be at most 900 fields, including up to 10 BLOB fields;
    /// field names must have between 1 and 30 characters (including only
    /// letters, digits or '_'), must start with a letter and cannot start
    /// with the "COOL_" prefix (in any lowercase/uppercase combination).

Note about these constraints:
- oracle max# columns is 1000 (COOL:900)
- mysql max# blob columns is 15 (COOL:10)
- oracle max column length is 30 (COOL:30 - mysql:64)


git-svn-id: file:///git/lcgcool.svndb/cool/trunk@8464 4525493e-7705-40b1-a816-d608a930855b