ABAP Select data from SAP table CMPECRPOPOVER into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CMPECRPOPOVER
*  INTO TABLE @DATA(IT_CMPECRPOPOVER2).
*--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_CMPECRPOPOVER INDEX 1 INTO DATA(WA_CMPECRPOPOVER2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CMPECRPOPOVER>-MANDT = 1.
<CMPECRPOPOVER>-CHANGERECORDUUID = 1.
<CMPECRPOPOVER>-CHANGENUMBER = 1.
<CMPECRPOPOVER>-CHANGERECORD = 1.
<CMPECRPOPOVER>-CHANGERECORDCATEGORY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CMPECRPOPOVER-CHANGERECORDPRIORITY, sy-vline,
  WA_CMPECRPOPOVER-CHANGERECORDSTATUS, sy-vline,
  WA_CMPECRPOPOVER-CHANGERECORDTYPE, sy-vline,
  WA_CMPECRPOPOVER-CHANGERECORDTYPEDESC, sy-vline,
  WA_CMPECRPOPOVER-CHGRECORDAPPLICATION, sy-vline,
  WA_CMPECRPOPOVER-CHGRECORDDESCRIPTIONTEXT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CMPECRPOPOVER 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_CMPECRPOPOVER 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_CMPECRPOPOVER INTO WA_CMPECRPOPOVER.


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

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

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

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

*Conversion exit ALPHA, internal->external for field PARTNER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CMPECRPOPOVER-PARTNER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CMPECRPOPOVER-PARTNER.
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_CMPECRPOPOVER_STR, 
MANDT TYPE STRING,
CHANGERECORDUUID TYPE STRING,
CHANGENUMBER TYPE STRING,
CHANGERECORD TYPE STRING,
CHANGERECORDCATEGORY TYPE STRING,
CHANGERECORDPRIORITY TYPE STRING,
CHANGERECORDSTATUS TYPE STRING,
CHANGERECORDTYPE TYPE STRING,
CHANGERECORDTYPEDESC TYPE STRING,
CHGRECORDAPPLICATION TYPE STRING,
CHGRECORDDESCRIPTIONTEXT TYPE STRING,
CREATEDBYUSER TYPE STRING,
CREATIONDATETIME TYPE STRING,
LASTCHANGEDATETIME TYPE STRING,
LASTCHANGEDBYUSER TYPE STRING,
PARENTCHANGERECORDUUID TYPE STRING,
PARTNER TYPE STRING,
PERSONFULLNAME TYPE STRING,
ROOTCHANGERECORDUUID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CMPECRPOPOVER_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_CMPECRPOPOVER_STR-MANDT sy-vline 
WA_CMPECRPOPOVER_STR-CHANGERECORDUUID sy-vline 
WA_CMPECRPOPOVER_STR-CHANGENUMBER sy-vline 
WA_CMPECRPOPOVER_STR-CHANGERECORD sy-vline 
WA_CMPECRPOPOVER_STR-CHANGERECORDCATEGORY sy-vline 
WA_CMPECRPOPOVER_STR-CHANGERECORDPRIORITY sy-vline 
WA_CMPECRPOPOVER_STR-CHANGERECORDSTATUS sy-vline 
WA_CMPECRPOPOVER_STR-CHANGERECORDTYPE sy-vline 
WA_CMPECRPOPOVER_STR-CHANGERECORDTYPEDESC sy-vline 
WA_CMPECRPOPOVER_STR-CHGRECORDAPPLICATION sy-vline 
WA_CMPECRPOPOVER_STR-CHGRECORDDESCRIPTIONTEXT sy-vline 
WA_CMPECRPOPOVER_STR-CREATEDBYUSER sy-vline 
WA_CMPECRPOPOVER_STR-CREATIONDATETIME sy-vline 
WA_CMPECRPOPOVER_STR-LASTCHANGEDATETIME sy-vline 
WA_CMPECRPOPOVER_STR-LASTCHANGEDBYUSER sy-vline 
WA_CMPECRPOPOVER_STR-PARENTCHANGERECORDUUID sy-vline 
WA_CMPECRPOPOVER_STR-PARTNER sy-vline 
WA_CMPECRPOPOVER_STR-PERSONFULLNAME sy-vline 
WA_CMPECRPOPOVER_STR-ROOTCHANGERECORDUUID sy-vline      INTO ld_text SEPARATED BY SPACE.

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