EXTREME Dynamic List of Field Symbols

Question

Hi All,
This requirement have created lots of issues fo me and oculd not reach it, hence i am here :
Internal table 1 with 'a' columns                    Internal Table 2  with 'b' columns
a1    a2     a3                                                b1      b2      b3
11     22    150                                               10      20       30
Note: BOTH ARE FIELD-SYMBOL INTERNAL TABLE of TYPE ANY and HAVE NO STRUCTURE UNTIL RUNTIME
What I want is a
- Get a List of How many columns are in FIELD SYMBOL Internal Table 1 at RUNTIME.
- DYNAMIC MAPPING TABLE that reads the HEADER OF COLUMNS and its DATA maps them in a Internal table at RUNTIME.
Col1    Col2     Col3    Col4
a1      11         b1        10
a2      22         b2        20
a3      150       b3       30

Answer 1

Hi,
- Get a List of How many columns are in FIELD SYMBOL Internal Table 1 at RUNTIME.
You will have to use RTTS class for that. Something like:
lo_sdescr ?= cl_abap_typedescr=>describe_by_data_ref( lo_data ). "lo_data containing ref. to your field-symbols
LOOP AT lo_sdescr->components INTO ls_component.
ENDLOOP
- DYNAMIC MAPPING TABLE that reads the HEADER OF COLUMNS and its DATA maps them in a Internal table at RUNTIME.
I don't see the need of a dynamic itab here, since the number/type of column seems to be fixed...
If needed, build it up using RTTS as well.
Kr,
m.