ABAP Select data from SAP table ESH_S_OM_SYSREL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ESH_S_OM_SYSREL
*  INTO TABLE @DATA(IT_ESH_S_OM_SYSREL2).
*--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_ESH_S_OM_SYSREL INDEX 1 INTO DATA(WA_ESH_S_OM_SYSREL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ESH_S_OM_SYSREL>-MANDT = 1.
<ESH_S_OM_SYSREL>-SYSREL_GUID = 1.
<ESH_S_OM_SYSREL>-SYSREL = 1.
<ESH_S_OM_SYSREL>-COMPONENT = 1.
<ESH_S_OM_SYSREL>-COMPONENT_REL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ESH_S_OM_SYSREL-SP_LEVEL, sy-vline,
  WA_ESH_S_OM_SYSREL-TEMPLATE_TYPE, sy-vline,
  WA_ESH_S_OM_SYSREL-BACKEND_NAME, sy-vline,
  WA_ESH_S_OM_SYSREL-VERSION_ID, sy-vline,
  WA_ESH_S_OM_SYSREL-MOD_STATUS, sy-vline,
  WA_ESH_S_OM_SYSREL-AENAM_MODEL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ESH_S_OM_SYSREL 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_ESH_S_OM_SYSREL 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_ESH_S_OM_SYSREL INTO WA_ESH_S_OM_SYSREL.


*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_ESH_S_OM_SYSREL_STR, 
MANDT TYPE STRING,
SYSREL_GUID TYPE STRING,
SYSREL TYPE STRING,
COMPONENT TYPE STRING,
COMPONENT_REL TYPE STRING,
SP_LEVEL TYPE STRING,
TEMPLATE_TYPE TYPE STRING,
BACKEND_NAME TYPE STRING,
VERSION_ID TYPE STRING,
MOD_STATUS TYPE STRING,
AENAM_MODEL TYPE STRING,
TIMESTMP_MODEL TYPE STRING,
AENAM_MODEL_C TYPE STRING,
TIMESTMP_MODEL_C TYPE STRING,
NO_EXTRACTION TYPE STRING,
SYSREL_TYPE TYPE STRING,
BASIS_SWC TYPE STRING,
DEVCLASS TYPE STRING,
APPL_COMP TYPE STRING,
SW_COMP TYPE STRING,
REPORTGEN_MINREL TYPE STRING,
REPORTGEN_MIN_SP TYPE STRING,
GTABKEY_HASHCODE TYPE STRING,
MODNAM_SEG TYPE STRING,
TIMESTMP_MOD_SEG TYPE STRING,
AREA_MOD_SEG TYPE STRING,
CRENAM_SEG TYPE STRING,
TIMESTMP_CRE_SEG TYPE STRING,
AREA_CRE_SEG TYPE STRING,
AENAM_SEG TYPE STRING,
TIMESTMP_AEN_SEG TYPE STRING,
ORG_SYSREL_GUID TYPE STRING,
UPDATE_FLAG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ESH_S_OM_SYSREL_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_ESH_S_OM_SYSREL_STR-MANDT sy-vline 
WA_ESH_S_OM_SYSREL_STR-SYSREL_GUID sy-vline 
WA_ESH_S_OM_SYSREL_STR-SYSREL sy-vline 
WA_ESH_S_OM_SYSREL_STR-COMPONENT sy-vline 
WA_ESH_S_OM_SYSREL_STR-COMPONENT_REL sy-vline 
WA_ESH_S_OM_SYSREL_STR-SP_LEVEL sy-vline 
WA_ESH_S_OM_SYSREL_STR-TEMPLATE_TYPE sy-vline 
WA_ESH_S_OM_SYSREL_STR-BACKEND_NAME sy-vline 
WA_ESH_S_OM_SYSREL_STR-VERSION_ID sy-vline 
WA_ESH_S_OM_SYSREL_STR-MOD_STATUS sy-vline 
WA_ESH_S_OM_SYSREL_STR-AENAM_MODEL sy-vline 
WA_ESH_S_OM_SYSREL_STR-TIMESTMP_MODEL sy-vline 
WA_ESH_S_OM_SYSREL_STR-AENAM_MODEL_C sy-vline 
WA_ESH_S_OM_SYSREL_STR-TIMESTMP_MODEL_C sy-vline 
WA_ESH_S_OM_SYSREL_STR-NO_EXTRACTION sy-vline 
WA_ESH_S_OM_SYSREL_STR-SYSREL_TYPE sy-vline 
WA_ESH_S_OM_SYSREL_STR-BASIS_SWC sy-vline 
WA_ESH_S_OM_SYSREL_STR-DEVCLASS sy-vline 
WA_ESH_S_OM_SYSREL_STR-APPL_COMP sy-vline 
WA_ESH_S_OM_SYSREL_STR-SW_COMP sy-vline 
WA_ESH_S_OM_SYSREL_STR-REPORTGEN_MINREL sy-vline 
WA_ESH_S_OM_SYSREL_STR-REPORTGEN_MIN_SP sy-vline 
WA_ESH_S_OM_SYSREL_STR-GTABKEY_HASHCODE sy-vline 
WA_ESH_S_OM_SYSREL_STR-MODNAM_SEG sy-vline 
WA_ESH_S_OM_SYSREL_STR-TIMESTMP_MOD_SEG sy-vline 
WA_ESH_S_OM_SYSREL_STR-AREA_MOD_SEG sy-vline 
WA_ESH_S_OM_SYSREL_STR-CRENAM_SEG sy-vline 
WA_ESH_S_OM_SYSREL_STR-TIMESTMP_CRE_SEG sy-vline 
WA_ESH_S_OM_SYSREL_STR-AREA_CRE_SEG sy-vline 
WA_ESH_S_OM_SYSREL_STR-AENAM_SEG sy-vline 
WA_ESH_S_OM_SYSREL_STR-TIMESTMP_AEN_SEG sy-vline 
WA_ESH_S_OM_SYSREL_STR-ORG_SYSREL_GUID sy-vline 
WA_ESH_S_OM_SYSREL_STR-UPDATE_FLAG sy-vline      INTO ld_text SEPARATED BY SPACE.

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