Exporting Table and Index Definitions 
This section describes the menu item Export structures of tables and indexes of the export/import menu.
With this function, you can export the definitions of one or more tables or indexes. The function creates import scripts with which you can recreate the tables and the indexes. See
Structure Import.A table definition contains table and column comments and the table constraints.
SAPDBA exports indexes that refer to a table even if they are stored in another tablespace. (Most of the indexes in the SAP database are stored in a different tablespace than that of the tables to which the indexes refer).