ABAP Select data from SAP table MEPOHEADER_IS_DATA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MEPOHEADER_IS_DATA
*  INTO TABLE @DATA(IT_MEPOHEADER_IS_DATA2).
*--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_MEPOHEADER_IS_DATA INDEX 1 INTO DATA(WA_MEPOHEADER_IS_DATA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MEPOHEADER_IS_DATA>-DUMMY = 1.
<MEPOHEADER_IS_DATA>-MSR_ID = 1.
<MEPOHEADER_IS_DATA>-FORCE_ID = 1.
<MEPOHEADER_IS_DATA>-FORCE_CNT = 1.
<MEPOHEADER_IS_DATA>-RELOC_ID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MEPOHEADER_IS_DATA-RELOC_SEQ_ID, sy-vline,
  WA_MEPOHEADER_IS_DATA-SOURCE_LOGSYS, sy-vline,
  WA_MEPOHEADER_IS_DATA-VZSKZ, sy-vline,
  WA_MEPOHEADER_IS_DATA-POHF_TYPE, sy-vline,
  WA_MEPOHEADER_IS_DATA-EQ_EINDT, sy-vline,
  WA_MEPOHEADER_IS_DATA-EQ_WERKS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MEPOHEADER_IS_DATA 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_MEPOHEADER_IS_DATA 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_MEPOHEADER_IS_DATA INTO WA_MEPOHEADER_IS_DATA.


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

*Conversion exit ALPHA, internal->external for field SOURCE_LOGSYS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MEPOHEADER_IS_DATA-SOURCE_LOGSYS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MEPOHEADER_IS_DATA-SOURCE_LOGSYS.
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_MEPOHEADER_IS_DATA_STR, 
DUMMY TYPE STRING,
MSR_ID TYPE STRING,
FORCE_ID TYPE STRING,
FORCE_CNT TYPE STRING,
RELOC_ID TYPE STRING,
RELOC_SEQ_ID TYPE STRING,
SOURCE_LOGSYS TYPE STRING,
VZSKZ TYPE STRING,
POHF_TYPE TYPE STRING,
EQ_EINDT TYPE STRING,
EQ_WERKS TYPE STRING,
FIXPO TYPE STRING,
EKGRP_ALLOW TYPE STRING,
WERKS_ALLOW TYPE STRING,
CONTRACT_ALLOW TYPE STRING,
PSTYP_ALLOW TYPE STRING,
FIXPO_ALLOW TYPE STRING,
KEY_ID_ALLOW TYPE STRING,
AUREL_ALLOW TYPE STRING,
DELPER_ALLOW TYPE STRING,
EINDT_ALLOW TYPE STRING,
LTSNR_ALLOW TYPE STRING,
OTB_LEVEL TYPE STRING,
OTB_COND_TYPE TYPE STRING,
KEY_ID TYPE STRING,
OTB_VALUE TYPE STRING,
OTB_CURR TYPE STRING,
OTB_RES_VALUE TYPE STRING,
OTB_SPEC_VALUE TYPE STRING,
SPR_RSN_PROFILE TYPE STRING,
BUDG_TYPE TYPE STRING,
OTB_STATUS TYPE STRING,
OTB_REASON TYPE STRING,
CHECK_TYPE TYPE STRING,
CON_OTB_REQ TYPE STRING,
CON_PREBOOK_LEV TYPE STRING,
CON_DISTR_LEV TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MEPOHEADER_IS_DATA_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_MEPOHEADER_IS_DATA_STR-DUMMY sy-vline 
WA_MEPOHEADER_IS_DATA_STR-MSR_ID sy-vline 
WA_MEPOHEADER_IS_DATA_STR-FORCE_ID sy-vline 
WA_MEPOHEADER_IS_DATA_STR-FORCE_CNT sy-vline 
WA_MEPOHEADER_IS_DATA_STR-RELOC_ID sy-vline 
WA_MEPOHEADER_IS_DATA_STR-RELOC_SEQ_ID sy-vline 
WA_MEPOHEADER_IS_DATA_STR-SOURCE_LOGSYS sy-vline 
WA_MEPOHEADER_IS_DATA_STR-VZSKZ sy-vline 
WA_MEPOHEADER_IS_DATA_STR-POHF_TYPE sy-vline 
WA_MEPOHEADER_IS_DATA_STR-EQ_EINDT sy-vline 
WA_MEPOHEADER_IS_DATA_STR-EQ_WERKS sy-vline 
WA_MEPOHEADER_IS_DATA_STR-FIXPO sy-vline 
WA_MEPOHEADER_IS_DATA_STR-EKGRP_ALLOW sy-vline 
WA_MEPOHEADER_IS_DATA_STR-WERKS_ALLOW sy-vline 
WA_MEPOHEADER_IS_DATA_STR-CONTRACT_ALLOW sy-vline 
WA_MEPOHEADER_IS_DATA_STR-PSTYP_ALLOW sy-vline 
WA_MEPOHEADER_IS_DATA_STR-FIXPO_ALLOW sy-vline 
WA_MEPOHEADER_IS_DATA_STR-KEY_ID_ALLOW sy-vline 
WA_MEPOHEADER_IS_DATA_STR-AUREL_ALLOW sy-vline 
WA_MEPOHEADER_IS_DATA_STR-DELPER_ALLOW sy-vline 
WA_MEPOHEADER_IS_DATA_STR-EINDT_ALLOW sy-vline 
WA_MEPOHEADER_IS_DATA_STR-LTSNR_ALLOW sy-vline 
WA_MEPOHEADER_IS_DATA_STR-OTB_LEVEL sy-vline 
WA_MEPOHEADER_IS_DATA_STR-OTB_COND_TYPE sy-vline 
WA_MEPOHEADER_IS_DATA_STR-KEY_ID sy-vline 
WA_MEPOHEADER_IS_DATA_STR-OTB_VALUE sy-vline 
WA_MEPOHEADER_IS_DATA_STR-OTB_CURR sy-vline 
WA_MEPOHEADER_IS_DATA_STR-OTB_RES_VALUE sy-vline 
WA_MEPOHEADER_IS_DATA_STR-OTB_SPEC_VALUE sy-vline 
WA_MEPOHEADER_IS_DATA_STR-SPR_RSN_PROFILE sy-vline 
WA_MEPOHEADER_IS_DATA_STR-BUDG_TYPE sy-vline 
WA_MEPOHEADER_IS_DATA_STR-OTB_STATUS sy-vline 
WA_MEPOHEADER_IS_DATA_STR-OTB_REASON sy-vline 
WA_MEPOHEADER_IS_DATA_STR-CHECK_TYPE sy-vline 
WA_MEPOHEADER_IS_DATA_STR-CON_OTB_REQ sy-vline 
WA_MEPOHEADER_IS_DATA_STR-CON_PREBOOK_LEV sy-vline 
WA_MEPOHEADER_IS_DATA_STR-CON_DISTR_LEV sy-vline      INTO ld_text SEPARATED BY SPACE.

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