ABAP Select data from SAP table MEMOACT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MEMOACT
*  INTO TABLE @DATA(IT_MEMOACT2).
*--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_MEMOACT INDEX 1 INTO DATA(WA_MEMOACT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MEMOACT>-INDIC = 1.
<MEMOACT>-ACTID = 1.
<MEMOACT>-APACT = 1.
<MEMOACT>-DATUM = 1.
<MEMOACT>-UZEIT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MEMOACT-UNAME, sy-vline,
  WA_MEMOACT-OTYPE, sy-vline,
  WA_MEMOACT-OBJID, sy-vline,
  WA_MEMOACT-REFID, sy-vline,
  WA_MEMOACT-IDTXT, sy-vline,
  WA_MEMOACT-RECTK, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MEMOACT 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_MEMOACT 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_MEMOACT INTO WA_MEMOACT.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_MEMOACT_STR, 
INDIC TYPE STRING,
ACTID TYPE STRING,
APACT TYPE STRING,
DATUM TYPE STRING,
UZEIT TYPE STRING,
UNAME TYPE STRING,
OTYPE TYPE STRING,
OBJID TYPE STRING,
REFID TYPE STRING,
IDTXT TYPE STRING,
RECTK TYPE STRING,
PERNR TYPE STRING,
PERNR1 TYPE STRING,
PERNR2 TYPE STRING,
PLDAT TYPE STRING,
PLTIM TYPE STRING,
LETEX TYPE STRING,
NOTEX TYPE STRING,
LEMOD TYPE STRING,
REMEM TYPE STRING,
GEBNR TYPE STRING,
ZIMNR TYPE STRING,
RCTK2 TYPE STRING,
RCTK3 TYPE STRING,
RCTK4 TYPE STRING,
ENAME TYPE STRING,
LANGT TYPE STRING,
WWDAT TYPE STRING,
WWTIM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MEMOACT_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_MEMOACT_STR-INDIC sy-vline 
WA_MEMOACT_STR-ACTID sy-vline 
WA_MEMOACT_STR-APACT sy-vline 
WA_MEMOACT_STR-DATUM sy-vline 
WA_MEMOACT_STR-UZEIT sy-vline 
WA_MEMOACT_STR-UNAME sy-vline 
WA_MEMOACT_STR-OTYPE sy-vline 
WA_MEMOACT_STR-OBJID sy-vline 
WA_MEMOACT_STR-REFID sy-vline 
WA_MEMOACT_STR-IDTXT sy-vline 
WA_MEMOACT_STR-RECTK sy-vline 
WA_MEMOACT_STR-PERNR sy-vline 
WA_MEMOACT_STR-PERNR1 sy-vline 
WA_MEMOACT_STR-PERNR2 sy-vline 
WA_MEMOACT_STR-PLDAT sy-vline 
WA_MEMOACT_STR-PLTIM sy-vline 
WA_MEMOACT_STR-LETEX sy-vline 
WA_MEMOACT_STR-NOTEX sy-vline 
WA_MEMOACT_STR-LEMOD sy-vline 
WA_MEMOACT_STR-REMEM sy-vline 
WA_MEMOACT_STR-GEBNR sy-vline 
WA_MEMOACT_STR-ZIMNR sy-vline 
WA_MEMOACT_STR-RCTK2 sy-vline 
WA_MEMOACT_STR-RCTK3 sy-vline 
WA_MEMOACT_STR-RCTK4 sy-vline 
WA_MEMOACT_STR-ENAME sy-vline 
WA_MEMOACT_STR-LANGT sy-vline 
WA_MEMOACT_STR-WWDAT sy-vline 
WA_MEMOACT_STR-WWTIM sy-vline      INTO ld_text SEPARATED BY SPACE.

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