ABAP Select data from SAP table APS_CCVEIT_P into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM APS_CCVEIT_P
*  INTO TABLE @DATA(IT_APS_CCVEIT_P2).
*--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_APS_CCVEIT_P INDEX 1 INTO DATA(WA_APS_CCVEIT_P2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<APS_CCVEIT_P>-ENTITYNAME = 1.
<APS_CCVEIT_P>-PARAMETERNAME = 1.
<APS_CCVEIT_P>-COUNTER = 1.
<APS_CCVEIT_P>-PARAMETERLABEL = 1.
<APS_CCVEIT_P>-DATAELEMENT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_APS_CCVEIT_P-DDICTYPE, sy-vline,
  WA_APS_CCVEIT_P-LENGTH, sy-vline,
  WA_APS_CCVEIT_P-DECIMALS, sy-vline,
  WA_APS_CCVEIT_P-ORIGINCODE, sy-vline,
  WA_APS_CCVEIT_P-SOURCEDATASOURCEALIAS, sy-vline,
  WA_APS_CCVEIT_P-SOURCEPARAMETERNAME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_APS_CCVEIT_P 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_APS_CCVEIT_P 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_APS_CCVEIT_P INTO WA_APS_CCVEIT_P.


*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_APS_CCVEIT_P_STR, 
ENTITYNAME TYPE STRING,
PARAMETERNAME TYPE STRING,
COUNTER TYPE STRING,
PARAMETERLABEL TYPE STRING,
DATAELEMENT TYPE STRING,
DDICTYPE TYPE STRING,
LENGTH TYPE STRING,
DECIMALS TYPE STRING,
ORIGINCODE TYPE STRING,
SOURCEDATASOURCEALIAS TYPE STRING,
SOURCEPARAMETERNAME TYPE STRING,
HIDDENINDICATOR TYPE STRING,
DEFAULTVALUETYPE TYPE STRING,
DEFAULTMANUALVALUE TYPE STRING,
DEFAULTSYSTEMVALUE TYPE STRING,
SEMANTICSANNOTATION TYPE STRING,
SEMANTICSVALUE TYPE STRING,
PARAM_UUID TYPE STRING,
SOURCE_DATA_SOURCE_UUID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_APS_CCVEIT_P_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_APS_CCVEIT_P_STR-ENTITYNAME sy-vline 
WA_APS_CCVEIT_P_STR-PARAMETERNAME sy-vline 
WA_APS_CCVEIT_P_STR-COUNTER sy-vline 
WA_APS_CCVEIT_P_STR-PARAMETERLABEL sy-vline 
WA_APS_CCVEIT_P_STR-DATAELEMENT sy-vline 
WA_APS_CCVEIT_P_STR-DDICTYPE sy-vline 
WA_APS_CCVEIT_P_STR-LENGTH sy-vline 
WA_APS_CCVEIT_P_STR-DECIMALS sy-vline 
WA_APS_CCVEIT_P_STR-ORIGINCODE sy-vline 
WA_APS_CCVEIT_P_STR-SOURCEDATASOURCEALIAS sy-vline 
WA_APS_CCVEIT_P_STR-SOURCEPARAMETERNAME sy-vline 
WA_APS_CCVEIT_P_STR-HIDDENINDICATOR sy-vline 
WA_APS_CCVEIT_P_STR-DEFAULTVALUETYPE sy-vline 
WA_APS_CCVEIT_P_STR-DEFAULTMANUALVALUE sy-vline 
WA_APS_CCVEIT_P_STR-DEFAULTSYSTEMVALUE sy-vline 
WA_APS_CCVEIT_P_STR-SEMANTICSANNOTATION sy-vline 
WA_APS_CCVEIT_P_STR-SEMANTICSVALUE sy-vline 
WA_APS_CCVEIT_P_STR-PARAM_UUID sy-vline 
WA_APS_CCVEIT_P_STR-SOURCE_DATA_SOURCE_UUID sy-vline      INTO ld_text SEPARATED BY SPACE.

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