ABAP Select data from SAP table GLE_MCA_VPIO into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM GLE_MCA_VPIO
*  INTO TABLE @DATA(IT_GLE_MCA_VPIO2).
*--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_GLE_MCA_VPIO INDEX 1 INTO DATA(WA_GLE_MCA_VPIO2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<GLE_MCA_VPIO>-MANDT = 1.
<GLE_MCA_VPIO>-KTOPL = 1.
<GLE_MCA_VPIO>-PRCCAT = 1.
<GLE_MCA_VPIO>-PRCTYPE = 1.
<GLE_MCA_VPIO>-SAKNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_GLE_MCA_VPIO-WAERS, sy-vline,
  WA_GLE_MCA_VPIO-POSTYPE, sy-vline,
  WA_GLE_MCA_VPIO-LEDENV, sy-vline,
  WA_GLE_MCA_VPIO-RLDNR, sy-vline,
  WA_GLE_MCA_VPIO-RBUKRS, sy-vline,
  WA_GLE_MCA_VPIO-CURTP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_GLE_MCA_VPIO 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_GLE_MCA_VPIO 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_GLE_MCA_VPIO INTO WA_GLE_MCA_VPIO.


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

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

*Conversion exit ALPHA, internal->external for field HKONT1
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_GLE_MCA_VPIO-HKONT1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GLE_MCA_VPIO-HKONT1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RCNTR1
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_GLE_MCA_VPIO-RCNTR1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GLE_MCA_VPIO-RCNTR1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field HKONT2
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_GLE_MCA_VPIO-HKONT2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GLE_MCA_VPIO-HKONT2.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RCNTR2
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_GLE_MCA_VPIO-RCNTR2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GLE_MCA_VPIO-RCNTR2.
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_GLE_MCA_VPIO_STR, 
MANDT TYPE STRING,
KTOPL TYPE STRING,
PRCCAT TYPE STRING,
PRCTYPE TYPE STRING,
SAKNR TYPE STRING,
WAERS TYPE STRING,
POSTYPE TYPE STRING,
LEDENV TYPE STRING,
RLDNR TYPE STRING,
RBUKRS TYPE STRING,
CURTP TYPE STRING,
HKONT1 TYPE STRING,
RCNTR1 TYPE STRING,
HKONT2 TYPE STRING,
RCNTR2 TYPE STRING,
TEXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_GLE_MCA_VPIO_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_GLE_MCA_VPIO_STR-MANDT sy-vline 
WA_GLE_MCA_VPIO_STR-KTOPL sy-vline 
WA_GLE_MCA_VPIO_STR-PRCCAT sy-vline 
WA_GLE_MCA_VPIO_STR-PRCTYPE sy-vline 
WA_GLE_MCA_VPIO_STR-SAKNR sy-vline 
WA_GLE_MCA_VPIO_STR-WAERS sy-vline 
WA_GLE_MCA_VPIO_STR-POSTYPE sy-vline 
WA_GLE_MCA_VPIO_STR-LEDENV sy-vline 
WA_GLE_MCA_VPIO_STR-RLDNR sy-vline 
WA_GLE_MCA_VPIO_STR-RBUKRS sy-vline 
WA_GLE_MCA_VPIO_STR-CURTP sy-vline 
WA_GLE_MCA_VPIO_STR-HKONT1 sy-vline 
WA_GLE_MCA_VPIO_STR-RCNTR1 sy-vline 
WA_GLE_MCA_VPIO_STR-HKONT2 sy-vline 
WA_GLE_MCA_VPIO_STR-RCNTR2 sy-vline 
WA_GLE_MCA_VPIO_STR-TEXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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