ABAP Select data from SAP table /AIF/IDOC_LIST_GENERATE_STRUC into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /AIF/IDOC_LIST_GENERATE_STRUC 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 /AIF/IDOC_LIST_GENERATE_STRUC. 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 /AIF/IDOC_LIST_GENERATE_STRUC 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_/AIF/IDOC_LIST_GENERATE_STRUC TYPE STANDARD TABLE OF /AIF/IDOC_LIST_GENERATE_STRUC,
      WA_/AIF/IDOC_LIST_GENERATE_STRUC TYPE /AIF/IDOC_LIST_GENERATE_STRUC,
      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: </AIF/IDOC_LIST_GENERATE_STRUC> TYPE /AIF/IDOC_LIST_GENERATE_STRUC.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /AIF/IDOC_LIST_GENERATE_STRUC
*  INTO TABLE @DATA(IT_/AIF/IDOC_LIST_GENERATE_STRUC2).
*--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_/AIF/IDOC_LIST_GENERATE_STRUC INDEX 1 INTO DATA(WA_/AIF/IDOC_LIST_GENERATE_STRUC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
</AIF/IDOC_LIST_GENERATE_STRUC>-INDEX = 1.
</AIF/IDOC_LIST_GENERATE_STRUC>-IDOC_STATUS = 1.
</AIF/IDOC_LIST_GENERATE_STRUC>-BG_LOG = 1.
</AIF/IDOC_LIST_GENERATE_STRUC>-APP_LOG = 1.
</AIF/IDOC_LIST_GENERATE_STRUC>-IDOCTYP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/AIF/IDOC_LIST_GENERATE_STRUC-MESGTYPE, sy-vline,
  WA_/AIF/IDOC_LIST_GENERATE_STRUC-EXTENSION, sy-vline,
  WA_/AIF/IDOC_LIST_GENERATE_STRUC-IS_UPDATE, sy-vline,
  WA_/AIF/IDOC_LIST_GENERATE_STRUC-ADD_DYN_SEG, sy-vline,
  WA_/AIF/IDOC_LIST_GENERATE_STRUC-IFNS, sy-vline,
  WA_/AIF/IDOC_LIST_GENERATE_STRUC-IFNAME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/AIF/IDOC_LIST_GENERATE_STRUC 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_/AIF/IDOC_LIST_GENERATE_STRUC 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_/AIF/IDOC_LIST_GENERATE_STRUC INTO WA_/AIF/IDOC_LIST_GENERATE_STRUC.


*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.
ENDFORM. 

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

TYPES: BEGIN OF T_/AIF/IDOC_LIST_GENERATE_STRUC_STR, 
INDEX TYPE STRING,
IDOC_STATUS TYPE STRING,
BG_LOG TYPE STRING,
APP_LOG TYPE STRING,
IDOCTYP TYPE STRING,
MESGTYPE TYPE STRING,
EXTENSION TYPE STRING,
IS_UPDATE TYPE STRING,
ADD_DYN_SEG TYPE STRING,
IFNS TYPE STRING,
IFNAME TYPE STRING,
IFVER TYPE STRING,
DESCRIPTION TYPE STRING,
PREFIX_STR TYPE STRING,
SAP_STRUC TYPE STRING,
RAW_STRUC TYPE STRING,
INF_TYPE TYPE STRING,
PERS_TYPE TYPE STRING,
SEL_TYPE TYPE STRING,
LOG_TYPE TYPE STRING,
PREFIX_INF TYPE STRING,
SHORT_NAME TYPE STRING,
IDOC_VARIANT TYPE STRING,
KEEP_SEGMENTS TYPE STRING,
DIRECTION TYPE STRING,
MESCOD TYPE STRING,
MESFCT TYPE STRING,
JOBNAME TYPE STRING,
JOBCOUNT TYPE STRING,
DEVCLASS TYPE STRING,
WORK_TR TYPE STRING,
CUST_TR TYPE STRING,
RFCDEST TYPE STRING,
ADD_KEEP_SEG TYPE STRING,
REPLACE_NAME_PRE_SLASH TYPE STRING,
CHECKED TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/AIF/IDOC_LIST_GENERATE_STRUC_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_/AIF/IDOC_LIST_GENERATE_STRUC_STR-INDEX sy-vline 
WA_/AIF/IDOC_LIST_GENERATE_STRUC_STR-IDOC_STATUS sy-vline 
WA_/AIF/IDOC_LIST_GENERATE_STRUC_STR-BG_LOG sy-vline 
WA_/AIF/IDOC_LIST_GENERATE_STRUC_STR-APP_LOG sy-vline 
WA_/AIF/IDOC_LIST_GENERATE_STRUC_STR-IDOCTYP sy-vline 
WA_/AIF/IDOC_LIST_GENERATE_STRUC_STR-MESGTYPE sy-vline 
WA_/AIF/IDOC_LIST_GENERATE_STRUC_STR-EXTENSION sy-vline 
WA_/AIF/IDOC_LIST_GENERATE_STRUC_STR-IS_UPDATE sy-vline 
WA_/AIF/IDOC_LIST_GENERATE_STRUC_STR-ADD_DYN_SEG sy-vline 
WA_/AIF/IDOC_LIST_GENERATE_STRUC_STR-IFNS sy-vline 
WA_/AIF/IDOC_LIST_GENERATE_STRUC_STR-IFNAME sy-vline 
WA_/AIF/IDOC_LIST_GENERATE_STRUC_STR-IFVER sy-vline 
WA_/AIF/IDOC_LIST_GENERATE_STRUC_STR-DESCRIPTION sy-vline 
WA_/AIF/IDOC_LIST_GENERATE_STRUC_STR-PREFIX_STR sy-vline 
WA_/AIF/IDOC_LIST_GENERATE_STRUC_STR-SAP_STRUC sy-vline 
WA_/AIF/IDOC_LIST_GENERATE_STRUC_STR-RAW_STRUC sy-vline 
WA_/AIF/IDOC_LIST_GENERATE_STRUC_STR-INF_TYPE sy-vline 
WA_/AIF/IDOC_LIST_GENERATE_STRUC_STR-PERS_TYPE sy-vline 
WA_/AIF/IDOC_LIST_GENERATE_STRUC_STR-SEL_TYPE sy-vline 
WA_/AIF/IDOC_LIST_GENERATE_STRUC_STR-LOG_TYPE sy-vline 
WA_/AIF/IDOC_LIST_GENERATE_STRUC_STR-PREFIX_INF sy-vline 
WA_/AIF/IDOC_LIST_GENERATE_STRUC_STR-SHORT_NAME sy-vline 
WA_/AIF/IDOC_LIST_GENERATE_STRUC_STR-IDOC_VARIANT sy-vline 
WA_/AIF/IDOC_LIST_GENERATE_STRUC_STR-KEEP_SEGMENTS sy-vline 
WA_/AIF/IDOC_LIST_GENERATE_STRUC_STR-DIRECTION sy-vline 
WA_/AIF/IDOC_LIST_GENERATE_STRUC_STR-MESCOD sy-vline 
WA_/AIF/IDOC_LIST_GENERATE_STRUC_STR-MESFCT sy-vline 
WA_/AIF/IDOC_LIST_GENERATE_STRUC_STR-JOBNAME sy-vline 
WA_/AIF/IDOC_LIST_GENERATE_STRUC_STR-JOBCOUNT sy-vline 
WA_/AIF/IDOC_LIST_GENERATE_STRUC_STR-DEVCLASS sy-vline 
WA_/AIF/IDOC_LIST_GENERATE_STRUC_STR-WORK_TR sy-vline 
WA_/AIF/IDOC_LIST_GENERATE_STRUC_STR-CUST_TR sy-vline 
WA_/AIF/IDOC_LIST_GENERATE_STRUC_STR-RFCDEST sy-vline 
WA_/AIF/IDOC_LIST_GENERATE_STRUC_STR-ADD_KEEP_SEG sy-vline 
WA_/AIF/IDOC_LIST_GENERATE_STRUC_STR-REPLACE_NAME_PRE_SLASH sy-vline 
WA_/AIF/IDOC_LIST_GENERATE_STRUC_STR-CHECKED sy-vline      INTO ld_text SEPARATED BY SPACE.

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