ABAP Select data from SAP table MCYA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MCYA
*  INTO TABLE @DATA(IT_MCYA2).
*--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_MCYA INDEX 1 INTO DATA(WA_MCYA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MCYA>-MANDT = 1.
<MCYA>-EXCEP = 1.
<MCYA>-GSTRU = 1.
<MCYA>-ANNAM = 1.
<MCYA>-ANDAT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MCYA-GENAM, sy-vline,
  WA_MCYA-GEDAT, sy-vline,
  WA_MCYA-XMAIL, sy-vline,
  WA_MCYA-MNAME, sy-vline,
  WA_MCYA-XFAX, sy-vline,
  WA_MCYA-FAXNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MCYA 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_MCYA 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_MCYA INTO WA_MCYA.


*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 SXIDN, internal->external for field MNAME
CALL FUNCTION 'CONVERSION_EXIT_SXIDN_OUTPUT'
  EXPORTING
    input =                      WA_MCYA-MNAME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MCYA-MNAME.
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_MCYA_STR, 
MANDT TYPE STRING,
EXCEP TYPE STRING,
GSTRU TYPE STRING,
ANNAM TYPE STRING,
ANDAT TYPE STRING,
GENAM TYPE STRING,
GEDAT TYPE STRING,
XMAIL TYPE STRING,
MNAME TYPE STRING,
XFAX TYPE STRING,
FAXNR TYPE STRING,
FARBE TYPE STRING,
XTAGL TYPE STRING,
XWOCH TYPE STRING,
XMONAT TYPE STRING,
ALISTE TYPE STRING,
ASYSTEM TYPE STRING,
AEVENT TYPE STRING,
WAERS TYPE STRING,
ANZPER TYPE STRING,
TREND TYPE STRING,
AKTPER TYPE STRING,
XSTUND TYPE STRING,
MCPER TYPE STRING,
KURST TYPE STRING,
STATI TYPE STRING,
VERKN TYPE STRING,
EXTYP TYPE STRING,
MEBEZ TYPE STRING,
PERRI TYPE STRING,
ASYSANA TYPE STRING,
WORKF TYPE STRING,
SELSET TYPE STRING,
REC_FAX TYPE STRING,
REC_STATE TYPE STRING,
BTCH_MODUS TYPE STRING,
TDFORM TYPE STRING,
VRSIO TYPE STRING,
XDLI TYPE STRING,
DLINAM TYPE STRING,
MCPERZ TYPE STRING,
WORKF_IND TYPE STRING,
WORKF_TAB TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MCYA_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_MCYA_STR-MANDT sy-vline 
WA_MCYA_STR-EXCEP sy-vline 
WA_MCYA_STR-GSTRU sy-vline 
WA_MCYA_STR-ANNAM sy-vline 
WA_MCYA_STR-ANDAT sy-vline 
WA_MCYA_STR-GENAM sy-vline 
WA_MCYA_STR-GEDAT sy-vline 
WA_MCYA_STR-XMAIL sy-vline 
WA_MCYA_STR-MNAME sy-vline 
WA_MCYA_STR-XFAX sy-vline 
WA_MCYA_STR-FAXNR sy-vline 
WA_MCYA_STR-FARBE sy-vline 
WA_MCYA_STR-XTAGL sy-vline 
WA_MCYA_STR-XWOCH sy-vline 
WA_MCYA_STR-XMONAT sy-vline 
WA_MCYA_STR-ALISTE sy-vline 
WA_MCYA_STR-ASYSTEM sy-vline 
WA_MCYA_STR-AEVENT sy-vline 
WA_MCYA_STR-WAERS sy-vline 
WA_MCYA_STR-ANZPER sy-vline 
WA_MCYA_STR-TREND sy-vline 
WA_MCYA_STR-AKTPER sy-vline 
WA_MCYA_STR-XSTUND sy-vline 
WA_MCYA_STR-MCPER sy-vline 
WA_MCYA_STR-KURST sy-vline 
WA_MCYA_STR-STATI sy-vline 
WA_MCYA_STR-VERKN sy-vline 
WA_MCYA_STR-EXTYP sy-vline 
WA_MCYA_STR-MEBEZ sy-vline 
WA_MCYA_STR-PERRI sy-vline 
WA_MCYA_STR-ASYSANA sy-vline 
WA_MCYA_STR-WORKF sy-vline 
WA_MCYA_STR-SELSET sy-vline 
WA_MCYA_STR-REC_FAX sy-vline 
WA_MCYA_STR-REC_STATE sy-vline 
WA_MCYA_STR-BTCH_MODUS sy-vline 
WA_MCYA_STR-TDFORM sy-vline 
WA_MCYA_STR-VRSIO sy-vline 
WA_MCYA_STR-XDLI sy-vline 
WA_MCYA_STR-DLINAM sy-vline 
WA_MCYA_STR-MCPERZ sy-vline 
WA_MCYA_STR-WORKF_IND sy-vline 
WA_MCYA_STR-WORKF_TAB sy-vline      INTO ld_text SEPARATED BY SPACE.

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