DATA: tabledescr TYPE REF TO cl_abap_tabledescr,
structuredescr TYPE REF TO CL_ABAP_DATADESCR.
tabledescr ?= cl_abap_tabledescr=>describe_by_data( table_type ).
call method tabledescr->GET_TABLE_LINE_TYPE
receiving P_DESCR_REF = structuredescr.
ASSERT structuredescr->absolute_name(6) = '\TYPE='.
structure_name = structuredescr->absolute_name+6(30).