ABAP Select data from SAP table COVMVDAT into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP COVMVDAT 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 COVMVDAT. 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 COVMVDAT 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_COVMVDAT TYPE STANDARD TABLE OF COVMVDAT,
      WA_COVMVDAT TYPE COVMVDAT,
      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: <COVMVDAT> TYPE COVMVDAT.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM COVMVDAT
*  INTO TABLE @DATA(IT_COVMVDAT2).
*--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_COVMVDAT INDEX 1 INTO DATA(WA_COVMVDAT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<COVMVDAT>-VIEW_TYPE = 1.
<COVMVDAT>-TESTKEY = 1.
<COVMVDAT>-LEV = 1.
<COVMVDAT>-PARENT = 1.
<COVMVDAT>-NAME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_COVMVDAT-PARLEV, sy-vline,
  WA_COVMVDAT-SRCSYSTEM, sy-vline,
  WA_COVMVDAT-PDEVCLASS, sy-vline,
  WA_COVMVDAT-SUCC_LEV, sy-vline,
  WA_COVMVDAT-TEXT, sy-vline,
  WA_COVMVDAT-PROZCNT1, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_COVMVDAT 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_COVMVDAT 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_COVMVDAT INTO WA_COVMVDAT.


*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_COVMVDAT_STR, 
VIEW_TYPE TYPE STRING,
TESTKEY TYPE STRING,
LEV TYPE STRING,
PARENT TYPE STRING,
NAME TYPE STRING,
PARLEV TYPE STRING,
SRCSYSTEM TYPE STRING,
PDEVCLASS TYPE STRING,
SUCC_LEV TYPE STRING,
TEXT TYPE STRING,
PROZCNT1 TYPE STRING,
PROZRBX1 TYPE STRING,
PROZRST1 TYPE STRING,
PROZCNT2 TYPE STRING,
PROZRBX2 TYPE STRING,
PROZTSTD TYPE STRING,
PROZUNICOD TYPE STRING,
LED TYPE STRING,
TOTAL TYPE STRING,
EFF TYPE STRING,
PROZTSTD_ST TYPE STRING,
TOTAL_ST TYPE STRING,
PROZTSTD_BRCH TYPE STRING,
TOTAL_BRCH TYPE STRING,
PROZ_CNT_CUM_ST TYPE STRING,
PROZ_CNT_CUM_BR TYPE STRING,
LEAF TYPE STRING,
TEXT0 TYPE STRING,
TEXT1 TYPE STRING,
TEXT2 TYPE STRING,
TEXT3 TYPE STRING,
TEXT4 TYPE STRING,
TEXT5 TYPE STRING,
TEXT6 TYPE STRING,
TEXT7 TYPE STRING,
TEXT8 TYPE STRING,
TEXT9 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_COVMVDAT_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_COVMVDAT_STR-VIEW_TYPE sy-vline 
WA_COVMVDAT_STR-TESTKEY sy-vline 
WA_COVMVDAT_STR-LEV sy-vline 
WA_COVMVDAT_STR-PARENT sy-vline 
WA_COVMVDAT_STR-NAME sy-vline 
WA_COVMVDAT_STR-PARLEV sy-vline 
WA_COVMVDAT_STR-SRCSYSTEM sy-vline 
WA_COVMVDAT_STR-PDEVCLASS sy-vline 
WA_COVMVDAT_STR-SUCC_LEV sy-vline 
WA_COVMVDAT_STR-TEXT sy-vline 
WA_COVMVDAT_STR-PROZCNT1 sy-vline 
WA_COVMVDAT_STR-PROZRBX1 sy-vline 
WA_COVMVDAT_STR-PROZRST1 sy-vline 
WA_COVMVDAT_STR-PROZCNT2 sy-vline 
WA_COVMVDAT_STR-PROZRBX2 sy-vline 
WA_COVMVDAT_STR-PROZTSTD sy-vline 
WA_COVMVDAT_STR-PROZUNICOD sy-vline 
WA_COVMVDAT_STR-LED sy-vline 
WA_COVMVDAT_STR-TOTAL sy-vline 
WA_COVMVDAT_STR-EFF sy-vline 
WA_COVMVDAT_STR-PROZTSTD_ST sy-vline 
WA_COVMVDAT_STR-TOTAL_ST sy-vline 
WA_COVMVDAT_STR-PROZTSTD_BRCH sy-vline 
WA_COVMVDAT_STR-TOTAL_BRCH sy-vline 
WA_COVMVDAT_STR-PROZ_CNT_CUM_ST sy-vline 
WA_COVMVDAT_STR-PROZ_CNT_CUM_BR sy-vline 
WA_COVMVDAT_STR-LEAF sy-vline 
WA_COVMVDAT_STR-TEXT0 sy-vline 
WA_COVMVDAT_STR-TEXT1 sy-vline 
WA_COVMVDAT_STR-TEXT2 sy-vline 
WA_COVMVDAT_STR-TEXT3 sy-vline 
WA_COVMVDAT_STR-TEXT4 sy-vline 
WA_COVMVDAT_STR-TEXT5 sy-vline 
WA_COVMVDAT_STR-TEXT6 sy-vline 
WA_COVMVDAT_STR-TEXT7 sy-vline 
WA_COVMVDAT_STR-TEXT8 sy-vline 
WA_COVMVDAT_STR-TEXT9 sy-vline      INTO ld_text SEPARATED BY SPACE.

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