ABAP Select data from SAP table SIMA_BASE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM SIMA_BASE
*  INTO TABLE @DATA(IT_SIMA_BASE2).
*--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_SIMA_BASE INDEX 1 INTO DATA(WA_SIMA_BASE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<SIMA_BASE>-ERNAM = 1.
<SIMA_BASE>-ERNAM_BUSINESS = 1.
<SIMA_BASE>-ERDAT = 1.
<SIMA_BASE>-AENAM = 1.
<SIMA_BASE>-AENAM_BUSINESS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_SIMA_BASE-AEDAT, sy-vline,
  WA_SIMA_BASE-INSOBJECTTYP, sy-vline,
  WA_SIMA_BASE-PARTNERACC, sy-vline,
  WA_SIMA_BASE-PARTNERACCTYP, sy-vline,
  WA_SIMA_BASE-FROMDATE, sy-vline,
  WA_SIMA_BASE-TODATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_SIMA_BASE 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_SIMA_BASE 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_SIMA_BASE INTO WA_SIMA_BASE.


*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 PARTNERACC
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_SIMA_BASE-PARTNERACC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_SIMA_BASE-PARTNERACC.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field FDGRP
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_SIMA_BASE-FDGRP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_SIMA_BASE-FDGRP.
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_SIMA_BASE_STR, 
ERNAM TYPE STRING,
ERNAM_BUSINESS TYPE STRING,
ERDAT TYPE STRING,
AENAM TYPE STRING,
AENAM_BUSINESS TYPE STRING,
AEDAT TYPE STRING,
INSOBJECTTYP TYPE STRING,
PARTNERACC TYPE STRING,
PARTNERACCTYP TYPE STRING,
FROMDATE TYPE STRING,
TODATE TYPE STRING,
FDGRP TYPE STRING,
FDZTG TYPE STRING,
XARCHIVE TYPE STRING,
AUGRP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_SIMA_BASE_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_SIMA_BASE_STR-ERNAM sy-vline 
WA_SIMA_BASE_STR-ERNAM_BUSINESS sy-vline 
WA_SIMA_BASE_STR-ERDAT sy-vline 
WA_SIMA_BASE_STR-AENAM sy-vline 
WA_SIMA_BASE_STR-AENAM_BUSINESS sy-vline 
WA_SIMA_BASE_STR-AEDAT sy-vline 
WA_SIMA_BASE_STR-INSOBJECTTYP sy-vline 
WA_SIMA_BASE_STR-PARTNERACC sy-vline 
WA_SIMA_BASE_STR-PARTNERACCTYP sy-vline 
WA_SIMA_BASE_STR-FROMDATE sy-vline 
WA_SIMA_BASE_STR-TODATE sy-vline 
WA_SIMA_BASE_STR-FDGRP sy-vline 
WA_SIMA_BASE_STR-FDZTG sy-vline 
WA_SIMA_BASE_STR-XARCHIVE sy-vline 
WA_SIMA_BASE_STR-AUGRP sy-vline      INTO ld_text SEPARATED BY SPACE.

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