ABAP Select data from SAP table ETRETRIEVE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ETRETRIEVE
*  INTO TABLE @DATA(IT_ETRETRIEVE2).
*--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_ETRETRIEVE INDEX 1 INTO DATA(WA_ETRETRIEVE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ETRETRIEVE>-PARAM = 1.
<ETRETRIEVE>-SCRIPT = 1.
<ETRETRIEVE>-VARID = 1.
<ETRETRIEVE>-LOGID = 1.
<ETRETRIEVE>-STARTUSER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ETRETRIEVE-SYSDATACONT, sy-vline,
  WA_ETRETRIEVE-TARGETSYSTEM, sy-vline,
  WA_ETRETRIEVE-DESTINATION, sy-vline,
  WA_ETRETRIEVE-MASTERSCRIPT, sy-vline,
  WA_ETRETRIEVE-STARTDATE, sy-vline,
  WA_ETRETRIEVE-TARGETSYSID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ETRETRIEVE 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_ETRETRIEVE 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_ETRETRIEVE INTO WA_ETRETRIEVE.


*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 ISOLA, internal->external for field TARGETLANGU
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_ETRETRIEVE-TARGETLANGU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ETRETRIEVE-TARGETLANGU.
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_ETRETRIEVE_STR, 
PARAM TYPE STRING,
SCRIPT TYPE STRING,
VARID TYPE STRING,
LOGID TYPE STRING,
STARTUSER TYPE STRING,
SYSDATACONT TYPE STRING,
TARGETSYSTEM TYPE STRING,
DESTINATION TYPE STRING,
MASTERSCRIPT TYPE STRING,
STARTDATE TYPE STRING,
TARGETSYSID TYPE STRING,
TARGETCLIENT TYPE STRING,
TARGETLANGU TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ETRETRIEVE_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_ETRETRIEVE_STR-PARAM sy-vline 
WA_ETRETRIEVE_STR-SCRIPT sy-vline 
WA_ETRETRIEVE_STR-VARID sy-vline 
WA_ETRETRIEVE_STR-LOGID sy-vline 
WA_ETRETRIEVE_STR-STARTUSER sy-vline 
WA_ETRETRIEVE_STR-SYSDATACONT sy-vline 
WA_ETRETRIEVE_STR-TARGETSYSTEM sy-vline 
WA_ETRETRIEVE_STR-DESTINATION sy-vline 
WA_ETRETRIEVE_STR-MASTERSCRIPT sy-vline 
WA_ETRETRIEVE_STR-STARTDATE sy-vline 
WA_ETRETRIEVE_STR-TARGETSYSID sy-vline 
WA_ETRETRIEVE_STR-TARGETCLIENT sy-vline 
WA_ETRETRIEVE_STR-TARGETLANGU sy-vline      INTO ld_text SEPARATED BY SPACE.

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