ABAP Select data from SAP table ESV_TCGC3 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP ESV_TCGC3 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 ESV_TCGC3. 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 ESV_TCGC3 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_ESV_TCGC3 TYPE STANDARD TABLE OF ESV_TCGC3,
      WA_ESV_TCGC3 TYPE ESV_TCGC3,
      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: <ESV_TCGC3> TYPE ESV_TCGC3.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_ESV_TCGC3.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM ESV_TCGC3
  INTO TABLE IT_ESV_TCGC3.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ESV_TCGC3
*  INTO TABLE @DATA(IT_ESV_TCGC32).
*--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_ESV_TCGC3 INDEX 1 INTO DATA(WA_ESV_TCGC32).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_ESV_TCGC3 ASSIGNING <ESV_TCGC3>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ESV_TCGC3>-MANDT = 1.
<ESV_TCGC3>-EPRID = 1.
<ESV_TCGC3>-EPRNAM = 1.
<ESV_TCGC3>-IEFILE = 1.
<ESV_TCGC3>-IEFULL = 1.

ENDLOOP.

LOOP AT IT_ESV_TCGC3 INTO WA_ESV_TCGC3.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ESV_TCGC3-IEFOW, sy-vline,
  WA_ESV_TCGC3-IEREF, sy-vline,
  WA_ESV_TCGC3-IEJOIN, sy-vline,
  WA_ESV_TCGC3-SUBCAT, sy-vline,
  WA_ESV_TCGC3-AUTHGRP, sy-vline,
  WA_ESV_TCGC3-IESEAR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ESV_TCGC3 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_ESV_TCGC3 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_ESV_TCGC3 INTO WA_ESV_TCGC3.


*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 ALPHA, internal->external for field OWNID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ESV_TCGC3-OWNID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ESV_TCGC3-OWNID.
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_ESV_TCGC3_STR, 
MANDT TYPE STRING,
EPRID TYPE STRING,
EPRNAM TYPE STRING,
IEFILE TYPE STRING,
IEFULL TYPE STRING,
IEFOW TYPE STRING,
IEREF TYPE STRING,
IEJOIN TYPE STRING,
SUBCAT TYPE STRING,
AUTHGRP TYPE STRING,
IESEAR TYPE STRING,
IDLIDSCR TYPE STRING,
IDLIDSEAR TYPE STRING,
IEOPCAT TYPE STRING,
MENID TYPE STRING,
USEPROF TYPE STRING,
OWNID TYPE STRING,
IEDEL TYPE STRING,
IEPHCON TYPE STRING,
IEUSE TYPE STRING,
IEREL TYPE STRING,
IESLST TYPE STRING,
IEMAT TYPE STRING,
IEEMUSE TYPE STRING,
IEIKEY TYPE STRING,
IENACT TYPE STRING,
TEXTCAT TYPE STRING,
COMPCAT TYPE STRING,
IERESRR TYPE STRING,
IEADMIN TYPE STRING,
IENOCDW TYPE STRING,
IESTATE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ESV_TCGC3_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_ESV_TCGC3_STR-MANDT sy-vline 
WA_ESV_TCGC3_STR-EPRID sy-vline 
WA_ESV_TCGC3_STR-EPRNAM sy-vline 
WA_ESV_TCGC3_STR-IEFILE sy-vline 
WA_ESV_TCGC3_STR-IEFULL sy-vline 
WA_ESV_TCGC3_STR-IEFOW sy-vline 
WA_ESV_TCGC3_STR-IEREF sy-vline 
WA_ESV_TCGC3_STR-IEJOIN sy-vline 
WA_ESV_TCGC3_STR-SUBCAT sy-vline 
WA_ESV_TCGC3_STR-AUTHGRP sy-vline 
WA_ESV_TCGC3_STR-IESEAR sy-vline 
WA_ESV_TCGC3_STR-IDLIDSCR sy-vline 
WA_ESV_TCGC3_STR-IDLIDSEAR sy-vline 
WA_ESV_TCGC3_STR-IEOPCAT sy-vline 
WA_ESV_TCGC3_STR-MENID sy-vline 
WA_ESV_TCGC3_STR-USEPROF sy-vline 
WA_ESV_TCGC3_STR-OWNID sy-vline 
WA_ESV_TCGC3_STR-IEDEL sy-vline 
WA_ESV_TCGC3_STR-IEPHCON sy-vline 
WA_ESV_TCGC3_STR-IEUSE sy-vline 
WA_ESV_TCGC3_STR-IEREL sy-vline 
WA_ESV_TCGC3_STR-IESLST sy-vline 
WA_ESV_TCGC3_STR-IEMAT sy-vline 
WA_ESV_TCGC3_STR-IEEMUSE sy-vline 
WA_ESV_TCGC3_STR-IEIKEY sy-vline 
WA_ESV_TCGC3_STR-IENACT sy-vline 
WA_ESV_TCGC3_STR-TEXTCAT sy-vline 
WA_ESV_TCGC3_STR-COMPCAT sy-vline 
WA_ESV_TCGC3_STR-IERESRR sy-vline 
WA_ESV_TCGC3_STR-IEADMIN sy-vline 
WA_ESV_TCGC3_STR-IENOCDW sy-vline 
WA_ESV_TCGC3_STR-IESTATE sy-vline      INTO ld_text SEPARATED BY SPACE.

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