ABAP Select data from SAP table /AIFX/SIW_AIF_GEN into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /AIFX/SIW_AIF_GEN table and store it within an internal table, including using the newer @DATA inline declaration methods. It also shows you various ways to process this data using ABAP work area, inline declaration or field symbols including executing all the relevant CONVERSION_EXIT routines specific to /AIFX/SIW_AIF_GEN. See here for more generic Select statement tips.

Sometimes data within SAP is stored within the database table in a different format to what it is displayed to the user. These input/output conversation FM routines are what translates the data between the two formats.

There is also a full declaration of the /AIFX/SIW_AIF_GEN table where each field has a char/string type for you to simply copy and paste. This allows you to use processing that is only available to these field types such as the CONCATENATE statement.

DATA: IT_/AIFX/SIW_AIF_GEN TYPE STANDARD TABLE OF /AIFX/SIW_AIF_GEN,
      WA_/AIFX/SIW_AIF_GEN TYPE /AIFX/SIW_AIF_GEN,
      GD_STR TYPE STRING.

DATA: lo_typedescr type REF TO cl_abap_typedescr.
DATA: lv_fieldname type fieldname.

FIELD-SYMBOLS: <FIELD> TYPE any.
FIELD-SYMBOLS: </AIFX/SIW_AIF_GEN> TYPE /AIFX/SIW_AIF_GEN.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_/AIFX/SIW_AIF_GEN.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /AIFX/SIW_AIF_GEN
  INTO TABLE IT_/AIFX/SIW_AIF_GEN.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /AIFX/SIW_AIF_GEN
*  INTO TABLE @DATA(IT_/AIFX/SIW_AIF_GEN2).
*--Further methods of using ABAP code to  select data from SAP database tables

*You can also declare the header/work area using the in-line DATA declaration method
READ TABLE IT_/AIFX/SIW_AIF_GEN INDEX 1 INTO DATA(WA_/AIFX/SIW_AIF_GEN2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/AIFX/SIW_AIF_GEN ASSIGNING </AIFX/SIW_AIF_GEN>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</AIFX/SIW_AIF_GEN>-FUNC_NAME = 1.
</AIFX/SIW_AIF_GEN>-BAPI_NAME = 1.
</AIFX/SIW_AIF_GEN>-TABNAME = 1.
</AIFX/SIW_AIF_GEN>-DDTEXT = 1.
</AIFX/SIW_AIF_GEN>-FUBA_CHECK_FOR_CHECK = 1.

ENDLOOP.

LOOP AT IT_/AIFX/SIW_AIF_GEN INTO WA_/AIFX/SIW_AIF_GEN.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/AIFX/SIW_AIF_GEN-FUBA_CHECK_FOR_INTERFACE, sy-vline,
  WA_/AIFX/SIW_AIF_GEN-FUBA_INIT_FOR_ACTION, sy-vline,
  WA_/AIFX/SIW_AIF_GEN-FUBA_INIT_TRANS, sy-vline,
  WA_/AIFX/SIW_AIF_GEN-FUBA_INIT_FOR_INTERFACE, sy-vline,
  WA_/AIFX/SIW_AIF_GEN-MAPFUNCBEFORE, sy-vline,
  WA_/AIFX/SIW_AIF_GEN-FUNCTION, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/AIFX/SIW_AIF_GEN you want to display...

  WRITE:/ sy-uline.
* Aternatively use generic code to Write field values (and NAME) to screen report
  DO.
    ASSIGN COMPONENT sy-index OF STRUCTURE wa_/AIFX/SIW_AIF_GEN TO <field>.
    IF sy-subrc <> 0. EXIT. ENDIF.
    WRITE:/ 'Field Value', <field>, sy-vline.
    gd_str = <field> .
    lo_typedescr ?= CL_ABAP_DATADESCR=>DESCRIBE_BY_DATA( <field> ).
    lv_fieldname = lo_typedescr->GET_RELATIVE_NAME( ).
    WRITE:/ 'Field Name', lv_fieldname.
  ENDDO.

  
*Redo loop but convert all fields from internal to out value  
LOOP AT IT_/AIFX/SIW_AIF_GEN INTO WA_/AIFX/SIW_AIF_GEN.


*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Convert all fields to display/output versions using conversion routines
  PERFORM convert_all_field_values CHANGING wa_EKKO.
	 
ENDLOOP.

  
*&---------------------------------------------------------------------*
*& Form convert_all_field_values
*&---------------------------------------------------------------------*
FORM convert_all_field_values CHANGING p_EKKO LIKE wa_EKKO.
DATA: ld_input(1000) TYPE c, ld_output(1000) TYPE C.

*Conversion exit ROOTS, internal->external for field RECTYPERAW
CALL FUNCTION 'CONVERSION_EXIT_ROOTS_OUTPUT'
  EXPORTING
    input =                      WA_/AIFX/SIW_AIF_GEN-RECTYPERAW
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/AIFX/SIW_AIF_GEN-RECTYPERAW.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field SPRAS
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_/AIFX/SIW_AIF_GEN-SPRAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/AIFX/SIW_AIF_GEN-SPRAS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ROOTS, internal->external for field RECTYPESAP
CALL FUNCTION 'CONVERSION_EXIT_ROOTS_OUTPUT'
  EXPORTING
    input =                      WA_/AIFX/SIW_AIF_GEN-RECTYPESAP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/AIFX/SIW_AIF_GEN-RECTYPESAP.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_/AIFX/SIW_AIF_GEN_STR, 
FUNC_NAME TYPE STRING,
BAPI_NAME TYPE STRING,
TABNAME TYPE STRING,
DDTEXT TYPE STRING,
FUBA_CHECK_FOR_CHECK TYPE STRING,
FUBA_CHECK_FOR_INTERFACE TYPE STRING,
FUBA_INIT_FOR_ACTION TYPE STRING,
FUBA_INIT_TRANS TYPE STRING,
FUBA_INIT_FOR_INTERFACE TYPE STRING,
MAPFUNCBEFORE TYPE STRING,
FUNCTION TYPE STRING,
VALMAPFUNCTION TYPE STRING,
MAPFUNCTION TYPE STRING,
FUNC_GRP_NAME TYPE STRING,
NS TYPE STRING,
IFNAME TYPE STRING,
IFVERSION TYPE STRING,
DDICSTRUCTURE TYPE STRING,
DDICSTRUCTURERAW TYPE STRING,
RECTYPERAW TYPE STRING,
IF_DDTEXT TYPE STRING,
SPRAS TYPE STRING,
IFACTION TYPE STRING,
ACTDESC TYPE STRING,
ECH TYPE STRING,
PREFIX TYPE STRING,
PACKAGE_NAME TYPE STRING,
MSG_TBL TYPE STRING,
MODULE_NAME TYPE STRING,
SCREEN_NUMBER TYPE STRING,
WEIGHTING TYPE STRING,
RES_NS TYPE STRING,
RES_ALRT TYPE STRING,
FIELDNAME TYPE STRING,
IMPORT_PARAMETER TYPE STRING,
NS_OUTPUT TYPE STRING,
IFNAME_OUTPUT TYPE STRING,
IFVERSION_OUTPUT TYPE STRING,
RECTYPESAP TYPE STRING,
IF_DDTEXT_OUTPUT TYPE STRING,
EXTENSION_TEMPLATE TYPE STRING,
INCLUDE_FILE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/AIFX/SIW_AIF_GEN_STR type T_EKKO_STR.

DATA: ld_text TYPE string.

LOOP AT IT_EKKO INTO WA_EKKO.
  MOVE-CORRESPONDING wa_EKKO TO WA_EKKO_STR.
  CONCATENATE: sy-vline
WA_/AIFX/SIW_AIF_GEN_STR-FUNC_NAME sy-vline 
WA_/AIFX/SIW_AIF_GEN_STR-BAPI_NAME sy-vline 
WA_/AIFX/SIW_AIF_GEN_STR-TABNAME sy-vline 
WA_/AIFX/SIW_AIF_GEN_STR-DDTEXT sy-vline 
WA_/AIFX/SIW_AIF_GEN_STR-FUBA_CHECK_FOR_CHECK sy-vline 
WA_/AIFX/SIW_AIF_GEN_STR-FUBA_CHECK_FOR_INTERFACE sy-vline 
WA_/AIFX/SIW_AIF_GEN_STR-FUBA_INIT_FOR_ACTION sy-vline 
WA_/AIFX/SIW_AIF_GEN_STR-FUBA_INIT_TRANS sy-vline 
WA_/AIFX/SIW_AIF_GEN_STR-FUBA_INIT_FOR_INTERFACE sy-vline 
WA_/AIFX/SIW_AIF_GEN_STR-MAPFUNCBEFORE sy-vline 
WA_/AIFX/SIW_AIF_GEN_STR-FUNCTION sy-vline 
WA_/AIFX/SIW_AIF_GEN_STR-VALMAPFUNCTION sy-vline 
WA_/AIFX/SIW_AIF_GEN_STR-MAPFUNCTION sy-vline 
WA_/AIFX/SIW_AIF_GEN_STR-FUNC_GRP_NAME sy-vline 
WA_/AIFX/SIW_AIF_GEN_STR-NS sy-vline 
WA_/AIFX/SIW_AIF_GEN_STR-IFNAME sy-vline 
WA_/AIFX/SIW_AIF_GEN_STR-IFVERSION sy-vline 
WA_/AIFX/SIW_AIF_GEN_STR-DDICSTRUCTURE sy-vline 
WA_/AIFX/SIW_AIF_GEN_STR-DDICSTRUCTURERAW sy-vline 
WA_/AIFX/SIW_AIF_GEN_STR-RECTYPERAW sy-vline 
WA_/AIFX/SIW_AIF_GEN_STR-IF_DDTEXT sy-vline 
WA_/AIFX/SIW_AIF_GEN_STR-SPRAS sy-vline 
WA_/AIFX/SIW_AIF_GEN_STR-IFACTION sy-vline 
WA_/AIFX/SIW_AIF_GEN_STR-ACTDESC sy-vline 
WA_/AIFX/SIW_AIF_GEN_STR-ECH sy-vline 
WA_/AIFX/SIW_AIF_GEN_STR-PREFIX sy-vline 
WA_/AIFX/SIW_AIF_GEN_STR-PACKAGE_NAME sy-vline 
WA_/AIFX/SIW_AIF_GEN_STR-MSG_TBL sy-vline 
WA_/AIFX/SIW_AIF_GEN_STR-MODULE_NAME sy-vline 
WA_/AIFX/SIW_AIF_GEN_STR-SCREEN_NUMBER sy-vline 
WA_/AIFX/SIW_AIF_GEN_STR-WEIGHTING sy-vline 
WA_/AIFX/SIW_AIF_GEN_STR-RES_NS sy-vline 
WA_/AIFX/SIW_AIF_GEN_STR-RES_ALRT sy-vline 
WA_/AIFX/SIW_AIF_GEN_STR-FIELDNAME sy-vline 
WA_/AIFX/SIW_AIF_GEN_STR-IMPORT_PARAMETER sy-vline 
WA_/AIFX/SIW_AIF_GEN_STR-NS_OUTPUT sy-vline 
WA_/AIFX/SIW_AIF_GEN_STR-IFNAME_OUTPUT sy-vline 
WA_/AIFX/SIW_AIF_GEN_STR-IFVERSION_OUTPUT sy-vline 
WA_/AIFX/SIW_AIF_GEN_STR-RECTYPESAP sy-vline 
WA_/AIFX/SIW_AIF_GEN_STR-IF_DDTEXT_OUTPUT sy-vline 
WA_/AIFX/SIW_AIF_GEN_STR-EXTENSION_TEMPLATE sy-vline 
WA_/AIFX/SIW_AIF_GEN_STR-INCLUDE_FILE sy-vline      INTO ld_text SEPARATED BY SPACE.

*Add any further fields from structure WA_EKKO_STR you want to CONCATENATE...
ENDLOOP.
ENDFORM.