ABAP Select data from SAP table ILCMCONTEXTENTAG into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ILCMCONTEXTENTAG
*  INTO TABLE @DATA(IT_ILCMCONTEXTENTAG2).
*--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_ILCMCONTEXTENTAG INDEX 1 INTO DATA(WA_ILCMCONTEXTENTAG2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ILCMCONTEXTENTAG>-MANDT = 1.
<ILCMCONTEXTENTAG>-LGLCNTNTMCNTXTENTITYUUID = 1.
<ILCMCONTEXTENTAG>-LGLCNTNTMCONTEXTUUID = 1.
<ILCMCONTEXTENTAG>-LGLCNTNTMENTITY = 1.
<ILCMCONTEXTENTAG>-LGLCNTNTMENTITYTYPE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ILCMCONTEXTENTAG-LGLCNTNTMTECHENTITYTYPE, sy-vline,
  WA_ILCMCONTEXTENTAG-LGLCNTNTMENTITYNAME, sy-vline,
  WA_ILCMCONTEXTENTAG-ORGANIZATIONBPNAME1, sy-vline,
  WA_ILCMCONTEXTENTAG-ORGANIZATIONBPNAME2, sy-vline,
  WA_ILCMCONTEXTENTAG-LGLCNTNTMCUSTOMERFIRSTNAME, sy-vline,
  WA_ILCMCONTEXTENTAG-LGLCNTNTMCUSTOMERSECONDNAME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ILCMCONTEXTENTAG 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_ILCMCONTEXTENTAG 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_ILCMCONTEXTENTAG INTO WA_ILCMCONTEXTENTAG.


*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_ILCMCONTEXTENTAG_STR, 
MANDT TYPE STRING,
LGLCNTNTMCNTXTENTITYUUID TYPE STRING,
LGLCNTNTMCONTEXTUUID TYPE STRING,
LGLCNTNTMENTITY TYPE STRING,
LGLCNTNTMENTITYTYPE TYPE STRING,
LGLCNTNTMTECHENTITYTYPE TYPE STRING,
LGLCNTNTMENTITYNAME TYPE STRING,
ORGANIZATIONBPNAME1 TYPE STRING,
ORGANIZATIONBPNAME2 TYPE STRING,
LGLCNTNTMCUSTOMERFIRSTNAME TYPE STRING,
LGLCNTNTMCUSTOMERSECONDNAME TYPE STRING,
COMPANYCODENAME TYPE STRING,
SALESORGANIZATIONNAME TYPE STRING,
PURCHASINGORGANIZATIONNAME TYPE STRING,
LGLCNTNTMBUSPARTNERFIRSTNAME TYPE STRING,
LGLCNTNTMBUSPARTNERSECONDNAME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ILCMCONTEXTENTAG_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_ILCMCONTEXTENTAG_STR-MANDT sy-vline 
WA_ILCMCONTEXTENTAG_STR-LGLCNTNTMCNTXTENTITYUUID sy-vline 
WA_ILCMCONTEXTENTAG_STR-LGLCNTNTMCONTEXTUUID sy-vline 
WA_ILCMCONTEXTENTAG_STR-LGLCNTNTMENTITY sy-vline 
WA_ILCMCONTEXTENTAG_STR-LGLCNTNTMENTITYTYPE sy-vline 
WA_ILCMCONTEXTENTAG_STR-LGLCNTNTMTECHENTITYTYPE sy-vline 
WA_ILCMCONTEXTENTAG_STR-LGLCNTNTMENTITYNAME sy-vline 
WA_ILCMCONTEXTENTAG_STR-ORGANIZATIONBPNAME1 sy-vline 
WA_ILCMCONTEXTENTAG_STR-ORGANIZATIONBPNAME2 sy-vline 
WA_ILCMCONTEXTENTAG_STR-LGLCNTNTMCUSTOMERFIRSTNAME sy-vline 
WA_ILCMCONTEXTENTAG_STR-LGLCNTNTMCUSTOMERSECONDNAME sy-vline 
WA_ILCMCONTEXTENTAG_STR-COMPANYCODENAME sy-vline 
WA_ILCMCONTEXTENTAG_STR-SALESORGANIZATIONNAME sy-vline 
WA_ILCMCONTEXTENTAG_STR-PURCHASINGORGANIZATIONNAME sy-vline 
WA_ILCMCONTEXTENTAG_STR-LGLCNTNTMBUSPARTNERFIRSTNAME sy-vline 
WA_ILCMCONTEXTENTAG_STR-LGLCNTNTMBUSPARTNERSECONDNAME sy-vline      INTO ld_text SEPARATED BY SPACE.

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