Flat files to Teradata tables - response (4) by SteveBovy

Yes we can read and import vsam files directly   (  all Teradata formats are supported ). Only sequential read is supported.   No keyed indexing is supported.  Alternate Index ( Path Names ) are also supported for sequential read.
Usually VSAM  files are created and maintained by  COBOL or ASM programs.  This means  the format will be   UNFORMATTED ( which on the mainframe is identical to FORMATTED ). So as long as you can create a ddl schema that matches their data lay-out format you should be good to go. CHAR,  INT  and  decimal should work   ( I am not sure if  float would be compatible with a cobol float ).  You need to understand and map our types to standard corresponding IBM Cobol mainframe types.  VARCHAR might also work ( if you created data that corresponds ) with our format.