ABAP Select data from SAP table QCERT_DATA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM QCERT_DATA
*  INTO TABLE @DATA(IT_QCERT_DATA2).
*--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_QCERT_DATA INDEX 1 INTO DATA(WA_QCERT_DATA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<QCERT_DATA>-VBELN = 1.
<QCERT_DATA>-POSNR = 1.
<QCERT_DATA>-ERNAM = 1.
<QCERT_DATA>-ERDAT = 1.
<QCERT_DATA>-ERZET = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_QCERT_DATA-VGPOS, sy-vline,
  WA_QCERT_DATA-VGBEL, sy-vline,
  WA_QCERT_DATA-CHARG, sy-vline,
  WA_QCERT_DATA-KUNAG, sy-vline,
  WA_QCERT_DATA-KUNNR, sy-vline,
  WA_QCERT_DATA-MATNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_QCERT_DATA 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_QCERT_DATA 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_QCERT_DATA INTO WA_QCERT_DATA.


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

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

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

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

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_QCERT_DATA-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_QCERT_DATA-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field POSEX
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_QCERT_DATA-POSEX
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_QCERT_DATA-POSEX.
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_QCERT_DATA_STR, 
VBELN TYPE STRING,
POSNR TYPE STRING,
ERNAM TYPE STRING,
ERDAT TYPE STRING,
ERZET TYPE STRING,
VGPOS TYPE STRING,
VGBEL TYPE STRING,
CHARG TYPE STRING,
KUNAG TYPE STRING,
KUNNR TYPE STRING,
MATNR TYPE STRING,
KDMAT TYPE STRING,
AUDAT TYPE STRING,
BSTKD TYPE STRING,
POSEX TYPE STRING,
BSTDK TYPE STRING,
CTYP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_QCERT_DATA_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_QCERT_DATA_STR-VBELN sy-vline 
WA_QCERT_DATA_STR-POSNR sy-vline 
WA_QCERT_DATA_STR-ERNAM sy-vline 
WA_QCERT_DATA_STR-ERDAT sy-vline 
WA_QCERT_DATA_STR-ERZET sy-vline 
WA_QCERT_DATA_STR-VGPOS sy-vline 
WA_QCERT_DATA_STR-VGBEL sy-vline 
WA_QCERT_DATA_STR-CHARG sy-vline 
WA_QCERT_DATA_STR-KUNAG sy-vline 
WA_QCERT_DATA_STR-KUNNR sy-vline 
WA_QCERT_DATA_STR-MATNR sy-vline 
WA_QCERT_DATA_STR-KDMAT sy-vline 
WA_QCERT_DATA_STR-AUDAT sy-vline 
WA_QCERT_DATA_STR-BSTKD sy-vline 
WA_QCERT_DATA_STR-POSEX sy-vline 
WA_QCERT_DATA_STR-BSTDK sy-vline 
WA_QCERT_DATA_STR-CTYP sy-vline      INTO ld_text SEPARATED BY SPACE.

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