ABAP Select data from SAP table SIMA_CORV into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP SIMA_CORV 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_CORV. 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_CORV 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_CORV TYPE STANDARD TABLE OF SIMA_CORV,
      WA_SIMA_CORV TYPE SIMA_CORV,
      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_CORV> TYPE SIMA_CORV.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM SIMA_CORV
*  INTO TABLE @DATA(IT_SIMA_CORV2).
*--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_CORV INDEX 1 INTO DATA(WA_SIMA_CORV2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<SIMA_CORV>-IS_COVAR = 1.
<SIMA_CORV>-FAART = 1.
<SIMA_CORV>-BASE_DATE = 1.
<SIMA_CORV>-CPAR_ACTIVE = 1.
<SIMA_CORV>-DEF_REC = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_SIMA_CORV-DEF_REC_IND, sy-vline,
  WA_SIMA_CORV-CB_GPART, sy-vline,
  WA_SIMA_CORV-CB_VKONT, sy-vline,
  WA_SIMA_CORV-CORR_MAHNV, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_SIMA_CORV 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_CORV 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_CORV INTO WA_SIMA_CORV.


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

*Conversion exit ALPHA, internal->external for field CB_GPART
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_SIMA_CORV-CB_GPART
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_SIMA_CORV-CB_GPART.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field CB_VKONT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_SIMA_CORV-CB_VKONT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_SIMA_CORV-CB_VKONT.
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_CORV_STR, 
IS_COVAR TYPE STRING,
FAART TYPE STRING,
BASE_DATE TYPE STRING,
CPAR_ACTIVE TYPE STRING,
DEF_REC TYPE STRING,
DEF_REC_IND TYPE STRING,
CB_GPART TYPE STRING,
CB_VKONT TYPE STRING,
CORR_MAHNV TYPE STRING,END OF T_EKKO_STR.
DATA: WA_SIMA_CORV_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_CORV_STR-IS_COVAR sy-vline 
WA_SIMA_CORV_STR-FAART sy-vline 
WA_SIMA_CORV_STR-BASE_DATE sy-vline 
WA_SIMA_CORV_STR-CPAR_ACTIVE sy-vline 
WA_SIMA_CORV_STR-DEF_REC sy-vline 
WA_SIMA_CORV_STR-DEF_REC_IND sy-vline 
WA_SIMA_CORV_STR-CB_GPART sy-vline 
WA_SIMA_CORV_STR-CB_VKONT sy-vline 
WA_SIMA_CORV_STR-CORR_MAHNV sy-vline      INTO ld_text SEPARATED BY SPACE.

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