ABAP Select data from SAP table MPEV_OANI_SIMU into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MPEV_OANI_SIMU
*  INTO TABLE @DATA(IT_MPEV_OANI_SIMU2).
*--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_MPEV_OANI_SIMU INDEX 1 INTO DATA(WA_MPEV_OANI_SIMU2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MPEV_OANI_SIMU>-MANDT = 1.
<MPEV_OANI_SIMU>-OAN_INSTANCE_ID = 1.
<MPEV_OANI_SIMU>-OAN_ID = 1.
<MPEV_OANI_SIMU>-OAN_VERSION_NO = 1.
<MPEV_OANI_SIMU>-AUFNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MPEV_OANI_SIMU-AUFPL, sy-vline,
  WA_MPEV_OANI_SIMU-APLZL_OPR, sy-vline,
  WA_MPEV_OANI_SIMU-SFI_CONF, sy-vline,
  WA_MPEV_OANI_SIMU-CONF_ALLWD, sy-vline,
  WA_MPEV_OANI_SIMU-CONF_NOT_ALLWD_RSN, sy-vline,
  WA_MPEV_OANI_SIMU-VSNMR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MPEV_OANI_SIMU 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_MPEV_OANI_SIMU 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_MPEV_OANI_SIMU INTO WA_MPEV_OANI_SIMU.


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

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_MPEV_OANI_SIMU-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MPEV_OANI_SIMU-MATNR.
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_MPEV_OANI_SIMU_STR, 
MANDT TYPE STRING,
OAN_INSTANCE_ID TYPE STRING,
OAN_ID TYPE STRING,
OAN_VERSION_NO TYPE STRING,
AUFNR TYPE STRING,
AUFPL TYPE STRING,
APLZL_OPR TYPE STRING,
SFI_CONF TYPE STRING,
CONF_ALLWD TYPE STRING,
CONF_NOT_ALLWD_RSN TYPE STRING,
VSNMR TYPE STRING,
AUART TYPE STRING,
AUTYP TYPE STRING,
WERKS TYPE STRING,
MATNR TYPE STRING,
ARBID TYPE STRING,
UNTTO TYPE STRING,
UEBTO TYPE STRING,
UEBTK TYPE STRING,
UMREZ TYPE STRING,
UMREN TYPE STRING,
SEGMENT_TYPE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MPEV_OANI_SIMU_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_MPEV_OANI_SIMU_STR-MANDT sy-vline 
WA_MPEV_OANI_SIMU_STR-OAN_INSTANCE_ID sy-vline 
WA_MPEV_OANI_SIMU_STR-OAN_ID sy-vline 
WA_MPEV_OANI_SIMU_STR-OAN_VERSION_NO sy-vline 
WA_MPEV_OANI_SIMU_STR-AUFNR sy-vline 
WA_MPEV_OANI_SIMU_STR-AUFPL sy-vline 
WA_MPEV_OANI_SIMU_STR-APLZL_OPR sy-vline 
WA_MPEV_OANI_SIMU_STR-SFI_CONF sy-vline 
WA_MPEV_OANI_SIMU_STR-CONF_ALLWD sy-vline 
WA_MPEV_OANI_SIMU_STR-CONF_NOT_ALLWD_RSN sy-vline 
WA_MPEV_OANI_SIMU_STR-VSNMR sy-vline 
WA_MPEV_OANI_SIMU_STR-AUART sy-vline 
WA_MPEV_OANI_SIMU_STR-AUTYP sy-vline 
WA_MPEV_OANI_SIMU_STR-WERKS sy-vline 
WA_MPEV_OANI_SIMU_STR-MATNR sy-vline 
WA_MPEV_OANI_SIMU_STR-ARBID sy-vline 
WA_MPEV_OANI_SIMU_STR-UNTTO sy-vline 
WA_MPEV_OANI_SIMU_STR-UEBTO sy-vline 
WA_MPEV_OANI_SIMU_STR-UEBTK sy-vline 
WA_MPEV_OANI_SIMU_STR-UMREZ sy-vline 
WA_MPEV_OANI_SIMU_STR-UMREN sy-vline 
WA_MPEV_OANI_SIMU_STR-SEGMENT_TYPE sy-vline      INTO ld_text SEPARATED BY SPACE.

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