In one of my project the data type of the variable to hold service consumption result is not known in design time so I have to generate the data type dynamically via code, using ABAP RTTC( runtime type creation ). For detail of RTTC and dynamic programming, please refer to sap help.
This blog will introduce a handy RTTC tool to generate any kind of complex data type in the runtime and demonstrate how to access the variable with that data type dynamically using field symbol.
one example: I need to define a variable with the following data type. The structure of the data type is only known in the runtime:
FIELD-SYMBOLS: TYPE any,
TYPE STANDARD TABLE,
TYPE STANDARD TABLE,
TYPE STANDARD TABLE.
ASSIGN lr_data->* TO .
CHECK sy-subrc = 0.
ASSIGN COMPONENT 'PRODUCTS' OF STRUCTURE TO .
CHECK sy-subrc = 0.
" create a new empty line to component PRODUCTS
APPEND INITIAL LINE TO ASSIGNING FIELD-SYMBOL().
CHECK sy-subrc = 0.
"fill the field PROD_ID for the first table line
ASSIGN COMPONENT 'PROD_ID' OF STRUCTURE TO FIELD-SYMBOL().
CHECK sy-subrc = 0.
= 'MCF-0001'.
ASSIGN COMPONENT 'COMPONENTS' OF STRUCTURE TO .
CHECK sy-subrc = 0.
" create a new empty line to component COMPONENTS
APPEND INITIAL LINE TO ASSIGNING FIELD-SYMBOL().
CHECK sy-subrc = 0.
" fill COMP_ID for the first table line
ASSIGN COMPONENT 'COMP_ID' OF STRUCTURE TO FIELD-SYMBOL().
CHECK sy-subrc = 0.
= 'COMP_0001'.
ASSIGN COMPONENT 'NOTES' OF STRUCTURE TO .
CHECK sy-subrc = 0.
" create a new empty line to component NOTES
APPEND INITIAL LINE TO ASSIGNING FIELD-SYMBOL().
CHECK sy-subrc = 0.
" fill NOTE_ID for the first table line
ASSIGN COMPONENT 'NOTE_ID' OF STRUCTURE TO FIELD-SYMBOL().
CHECK sy-subrc = 0.
= 'NOTE_0001'.
