ABAP Select data from SAP table GEFS_GEOM_RET into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM GEFS_GEOM_RET
*  INTO TABLE @DATA(IT_GEFS_GEOM_RET2).
*--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_GEFS_GEOM_RET INDEX 1 INTO DATA(WA_GEFS_GEOM_RET2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<GEFS_GEOM_RET>-GEF_OBJECTID = 1.
<GEFS_GEOM_RET>-TYPE = 1.
<GEFS_GEOM_RET>-TEXT = 1.
<GEFS_GEOM_RET>-MSGID = 1.
<GEFS_GEOM_RET>-MSGNO = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_GEFS_GEOM_RET-ATTR1, sy-vline,
  WA_GEFS_GEOM_RET-ATTR2, sy-vline,
  WA_GEFS_GEOM_RET-ATTR3, sy-vline,
  WA_GEFS_GEOM_RET-ATTR4, sy-vline,
  WA_GEFS_GEOM_RET-EXCEPTION, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_GEFS_GEOM_RET 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_GEFS_GEOM_RET 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_GEFS_GEOM_RET INTO WA_GEFS_GEOM_RET.


*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_GEFS_GEOM_RET_STR, 
GEF_OBJECTID TYPE STRING,
TYPE TYPE STRING,
TEXT TYPE STRING,
MSGID TYPE STRING,
MSGNO TYPE STRING,
ATTR1 TYPE STRING,
ATTR2 TYPE STRING,
ATTR3 TYPE STRING,
ATTR4 TYPE STRING,
EXCEPTION TYPE STRING,END OF T_EKKO_STR.
DATA: WA_GEFS_GEOM_RET_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_GEFS_GEOM_RET_STR-GEF_OBJECTID sy-vline 
WA_GEFS_GEOM_RET_STR-TYPE sy-vline 
WA_GEFS_GEOM_RET_STR-TEXT sy-vline 
WA_GEFS_GEOM_RET_STR-MSGID sy-vline 
WA_GEFS_GEOM_RET_STR-MSGNO sy-vline 
WA_GEFS_GEOM_RET_STR-ATTR1 sy-vline 
WA_GEFS_GEOM_RET_STR-ATTR2 sy-vline 
WA_GEFS_GEOM_RET_STR-ATTR3 sy-vline 
WA_GEFS_GEOM_RET_STR-ATTR4 sy-vline 
WA_GEFS_GEOM_RET_STR-EXCEPTION sy-vline      INTO ld_text SEPARATED BY SPACE.

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