ABAP Select data from SAP table EAM_S_IHGNS into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP EAM_S_IHGNS 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 EAM_S_IHGNS. 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 EAM_S_IHGNS 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_EAM_S_IHGNS TYPE STANDARD TABLE OF EAM_S_IHGNS,
      WA_EAM_S_IHGNS TYPE EAM_S_IHGNS,
      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: <EAM_S_IHGNS> TYPE EAM_S_IHGNS.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM EAM_S_IHGNS
  INTO TABLE IT_EAM_S_IHGNS.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM EAM_S_IHGNS
*  INTO TABLE @DATA(IT_EAM_S_IHGNS2).
*--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_EAM_S_IHGNS INDEX 1 INTO DATA(WA_EAM_S_IHGNS2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_EAM_S_IHGNS ASSIGNING <EAM_S_IHGNS>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<EAM_S_IHGNS>-PMSOG = 1.
<EAM_S_IHGNS>-MANDT = 1.
<EAM_S_IHGNS>-OBJNR = 1.
<EAM_S_IHGNS>-COUNTER = 1.
<EAM_S_IHGNS>-COUNTERS = 1.

ENDLOOP.

LOOP AT IT_EAM_S_IHGNS INTO WA_EAM_S_IHGNS.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_EAM_S_IHGNS-GENPAUS, sy-vline,
  WA_EAM_S_IHGNS-GENNAME, sy-vline,
  WA_EAM_S_IHGNS-GENDATUM, sy-vline,
  WA_EAM_S_IHGNS-GENTIME, sy-vline,
  WA_EAM_S_IHGNS-GENVDATE, sy-vline,
  WA_EAM_S_IHGNS-GENBDATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_EAM_S_IHGNS 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_EAM_S_IHGNS 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_EAM_S_IHGNS INTO WA_EAM_S_IHGNS.


*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_EAM_S_IHGNS_STR, 
PMSOG TYPE STRING,
MANDT TYPE STRING,
OBJNR TYPE STRING,
COUNTER TYPE STRING,
COUNTERS TYPE STRING,
GENPAUS TYPE STRING,
GENNAME TYPE STRING,
GENDATUM TYPE STRING,
GENTIME TYPE STRING,
GENVDATE TYPE STRING,
GENBDATE TYPE STRING,
GENVTIME TYPE STRING,
GENBTIME TYPE STRING,
GENINAME TYPE STRING,
GENIDATE TYPE STRING,
GENITIME TYPE STRING,
GENIAKT TYPE STRING,
K_GENEHM TYPE STRING,
GENVNAME TYPE STRING,
IWERK TYPE STRING,END OF T_EKKO_STR.
DATA: WA_EAM_S_IHGNS_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_EAM_S_IHGNS_STR-PMSOG sy-vline 
WA_EAM_S_IHGNS_STR-MANDT sy-vline 
WA_EAM_S_IHGNS_STR-OBJNR sy-vline 
WA_EAM_S_IHGNS_STR-COUNTER sy-vline 
WA_EAM_S_IHGNS_STR-COUNTERS sy-vline 
WA_EAM_S_IHGNS_STR-GENPAUS sy-vline 
WA_EAM_S_IHGNS_STR-GENNAME sy-vline 
WA_EAM_S_IHGNS_STR-GENDATUM sy-vline 
WA_EAM_S_IHGNS_STR-GENTIME sy-vline 
WA_EAM_S_IHGNS_STR-GENVDATE sy-vline 
WA_EAM_S_IHGNS_STR-GENBDATE sy-vline 
WA_EAM_S_IHGNS_STR-GENVTIME sy-vline 
WA_EAM_S_IHGNS_STR-GENBTIME sy-vline 
WA_EAM_S_IHGNS_STR-GENINAME sy-vline 
WA_EAM_S_IHGNS_STR-GENIDATE sy-vline 
WA_EAM_S_IHGNS_STR-GENITIME sy-vline 
WA_EAM_S_IHGNS_STR-GENIAKT sy-vline 
WA_EAM_S_IHGNS_STR-K_GENEHM sy-vline 
WA_EAM_S_IHGNS_STR-GENVNAME sy-vline 
WA_EAM_S_IHGNS_STR-IWERK sy-vline      INTO ld_text SEPARATED BY SPACE.

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