ABAP Select data from SAP table ESO_S_MPLA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ESO_S_MPLA
*  INTO TABLE @DATA(IT_ESO_S_MPLA2).
*--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_ESO_S_MPLA INDEX 1 INTO DATA(WA_ESO_S_MPLA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ESO_S_MPLA>-WARPL = 1.
<ESO_S_MPLA>-WARPL_EXT = 1.
<ESO_S_MPLA>-ERSDT = 1.
<ESO_S_MPLA>-ERNAM = 1.
<ESO_S_MPLA>-AEDAT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ESO_S_MPLA-AENAM, sy-vline,
  WA_ESO_S_MPLA-WPTXT, sy-vline,
  WA_ESO_S_MPLA-STRAT, sy-vline,
  WA_ESO_S_MPLA-ABRHO, sy-vline,
  WA_ESO_S_MPLA-KUNUM, sy-vline,
  WA_ESO_S_MPLA-KUNUM_EXT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ESO_S_MPLA 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_ESO_S_MPLA 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_ESO_S_MPLA INTO WA_ESO_S_MPLA.


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

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

*Conversion exit ISOLA, internal->external for field LANGU
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_ESO_S_MPLA-LANGU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ESO_S_MPLA-LANGU.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field HUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_ESO_S_MPLA-HUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ESO_S_MPLA-HUNIT.
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_ESO_S_MPLA_STR, 
WARPL TYPE STRING,
WARPL_EXT TYPE STRING,
ERSDT TYPE STRING,
ERNAM TYPE STRING,
AEDAT TYPE STRING,
AENAM TYPE STRING,
WPTXT TYPE STRING,
STRAT TYPE STRING,
ABRHO TYPE STRING,
KUNUM TYPE STRING,
KUNUM_EXT TYPE STRING,
LTKNZ TYPE STRING,
LVORM TYPE STRING,
ANZPS TYPE STRING,
ABNUM TYPE STRING,
LANGU TYPE STRING,
VSPOS TYPE STRING,
VSNEG TYPE STRING,
TOPOS TYPE STRING,
TONEG TYPE STRING,
SFAKT TYPE STRING,
STICH TYPE STRING,
HORIZ TYPE STRING,
ANDOR TYPE STRING,
BEGRU TYPE STRING,
MPTYP TYPE STRING,
HUNIT TYPE STRING,
STADT TYPE STRING,
SZAEH TYPE STRING,
PLAN_SORT TYPE STRING,
PUFFP TYPE STRING,
PUFFN TYPE STRING,
START_DATE TYPE STRING,
START_TIME TYPE STRING,
MCP_SF TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ESO_S_MPLA_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_ESO_S_MPLA_STR-WARPL sy-vline 
WA_ESO_S_MPLA_STR-WARPL_EXT sy-vline 
WA_ESO_S_MPLA_STR-ERSDT sy-vline 
WA_ESO_S_MPLA_STR-ERNAM sy-vline 
WA_ESO_S_MPLA_STR-AEDAT sy-vline 
WA_ESO_S_MPLA_STR-AENAM sy-vline 
WA_ESO_S_MPLA_STR-WPTXT sy-vline 
WA_ESO_S_MPLA_STR-STRAT sy-vline 
WA_ESO_S_MPLA_STR-ABRHO sy-vline 
WA_ESO_S_MPLA_STR-KUNUM sy-vline 
WA_ESO_S_MPLA_STR-KUNUM_EXT sy-vline 
WA_ESO_S_MPLA_STR-LTKNZ sy-vline 
WA_ESO_S_MPLA_STR-LVORM sy-vline 
WA_ESO_S_MPLA_STR-ANZPS sy-vline 
WA_ESO_S_MPLA_STR-ABNUM sy-vline 
WA_ESO_S_MPLA_STR-LANGU sy-vline 
WA_ESO_S_MPLA_STR-VSPOS sy-vline 
WA_ESO_S_MPLA_STR-VSNEG sy-vline 
WA_ESO_S_MPLA_STR-TOPOS sy-vline 
WA_ESO_S_MPLA_STR-TONEG sy-vline 
WA_ESO_S_MPLA_STR-SFAKT sy-vline 
WA_ESO_S_MPLA_STR-STICH sy-vline 
WA_ESO_S_MPLA_STR-HORIZ sy-vline 
WA_ESO_S_MPLA_STR-ANDOR sy-vline 
WA_ESO_S_MPLA_STR-BEGRU sy-vline 
WA_ESO_S_MPLA_STR-MPTYP sy-vline 
WA_ESO_S_MPLA_STR-HUNIT sy-vline 
WA_ESO_S_MPLA_STR-STADT sy-vline 
WA_ESO_S_MPLA_STR-SZAEH sy-vline 
WA_ESO_S_MPLA_STR-PLAN_SORT sy-vline 
WA_ESO_S_MPLA_STR-PUFFP sy-vline 
WA_ESO_S_MPLA_STR-PUFFN sy-vline 
WA_ESO_S_MPLA_STR-START_DATE sy-vline 
WA_ESO_S_MPLA_STR-START_TIME sy-vline 
WA_ESO_S_MPLA_STR-MCP_SF sy-vline      INTO ld_text SEPARATED BY SPACE.

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