ABAP Select data from SAP table MPES_RTGP_HDR_INS_UI into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MPES_RTGP_HDR_INS_UI
*  INTO TABLE @DATA(IT_MPES_RTGP_HDR_INS_UI2).
*--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_MPES_RTGP_HDR_INS_UI INDEX 1 INTO DATA(WA_MPES_RTGP_HDR_INS_UI2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MPES_RTGP_HDR_INS_UI>-PLNTY = 1.
<MPES_RTGP_HDR_INS_UI>-PLNNR = 1.
<MPES_RTGP_HDR_INS_UI>-PLNAL = 1.
<MPES_RTGP_HDR_INS_UI>-DATUV = 1.
<MPES_RTGP_HDR_INS_UI>-AENNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MPES_RTGP_HDR_INS_UI-VERWE, sy-vline,
  WA_MPES_RTGP_HDR_INS_UI-WERKS, sy-vline,
  WA_MPES_RTGP_HDR_INS_UI-STATU, sy-vline,
  WA_MPES_RTGP_HDR_INS_UI-PLNME, sy-vline,
  WA_MPES_RTGP_HDR_INS_UI-LOSVN, sy-vline,
  WA_MPES_RTGP_HDR_INS_UI-LOSBS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MPES_RTGP_HDR_INS_UI 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_MPES_RTGP_HDR_INS_UI 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_MPES_RTGP_HDR_INS_UI INTO WA_MPES_RTGP_HDR_INS_UI.


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

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

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

*Conversion exit CUNIT, internal->external for field PLNME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MPES_RTGP_HDR_INS_UI-PLNME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MPES_RTGP_HDR_INS_UI-PLNME.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ALPHA, internal->external for field SOURCE_PLNAL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MPES_RTGP_HDR_INS_UI-SOURCE_PLNAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MPES_RTGP_HDR_INS_UI-SOURCE_PLNAL.
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_MPES_RTGP_HDR_INS_UI_STR, 
PLNTY TYPE STRING,
PLNNR TYPE STRING,
PLNAL TYPE STRING,
DATUV TYPE STRING,
AENNR TYPE STRING,
VERWE TYPE STRING,
WERKS TYPE STRING,
STATU TYPE STRING,
PLNME TYPE STRING,
LOSVN TYPE STRING,
LOSBS TYPE STRING,
VAGRP TYPE STRING,
KTEXT TYPE STRING,
QKZRASTER TYPE STRING,
SLWBEZ TYPE STRING,
PPKZTLZU TYPE STRING,
KAP_ARBPL TYPE STRING,
ALTEXT TYPE STRING,
CPX_LVL TYPE STRING,
AENNR_REL_CHECK TYPE STRING,
DUMMY_PLKO_INCL_EEW_PS TYPE STRING,
DUMMY_PLVK_INCL_EEW_PS TYPE STRING,
SOURCE_PLNTY TYPE STRING,
SOURCE_PLNNR TYPE STRING,
SOURCE_PLNAL TYPE STRING,
COPY_ONLY_HEADER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MPES_RTGP_HDR_INS_UI_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_MPES_RTGP_HDR_INS_UI_STR-PLNTY sy-vline 
WA_MPES_RTGP_HDR_INS_UI_STR-PLNNR sy-vline 
WA_MPES_RTGP_HDR_INS_UI_STR-PLNAL sy-vline 
WA_MPES_RTGP_HDR_INS_UI_STR-DATUV sy-vline 
WA_MPES_RTGP_HDR_INS_UI_STR-AENNR sy-vline 
WA_MPES_RTGP_HDR_INS_UI_STR-VERWE sy-vline 
WA_MPES_RTGP_HDR_INS_UI_STR-WERKS sy-vline 
WA_MPES_RTGP_HDR_INS_UI_STR-STATU sy-vline 
WA_MPES_RTGP_HDR_INS_UI_STR-PLNME sy-vline 
WA_MPES_RTGP_HDR_INS_UI_STR-LOSVN sy-vline 
WA_MPES_RTGP_HDR_INS_UI_STR-LOSBS sy-vline 
WA_MPES_RTGP_HDR_INS_UI_STR-VAGRP sy-vline 
WA_MPES_RTGP_HDR_INS_UI_STR-KTEXT sy-vline 
WA_MPES_RTGP_HDR_INS_UI_STR-QKZRASTER sy-vline 
WA_MPES_RTGP_HDR_INS_UI_STR-SLWBEZ sy-vline 
WA_MPES_RTGP_HDR_INS_UI_STR-PPKZTLZU sy-vline 
WA_MPES_RTGP_HDR_INS_UI_STR-KAP_ARBPL sy-vline 
WA_MPES_RTGP_HDR_INS_UI_STR-ALTEXT sy-vline 
WA_MPES_RTGP_HDR_INS_UI_STR-CPX_LVL sy-vline 
WA_MPES_RTGP_HDR_INS_UI_STR-AENNR_REL_CHECK sy-vline 
WA_MPES_RTGP_HDR_INS_UI_STR-DUMMY_PLKO_INCL_EEW_PS sy-vline 
WA_MPES_RTGP_HDR_INS_UI_STR-DUMMY_PLVK_INCL_EEW_PS sy-vline 
WA_MPES_RTGP_HDR_INS_UI_STR-SOURCE_PLNTY sy-vline 
WA_MPES_RTGP_HDR_INS_UI_STR-SOURCE_PLNNR sy-vline 
WA_MPES_RTGP_HDR_INS_UI_STR-SOURCE_PLNAL sy-vline 
WA_MPES_RTGP_HDR_INS_UI_STR-COPY_ONLY_HEADER sy-vline      INTO ld_text SEPARATED BY SPACE.

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